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Antipredator Vocalization Usage in the Male Ring-Tailed Lemur (Lemur catta) / Laura M. Bolt ; Michelle L. Sauther ; Frank P. Cuozzo ; Ibrahim Antho Youssouf Jacky
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Titre : Antipredator Vocalization Usage in the Male Ring-Tailed Lemur (Lemur catta) Type de document : texte imprimé Auteurs : Laura M. Bolt ; Michelle L. Sauther ; Frank P. Cuozzo ; Ibrahim Antho Youssouf Jacky Année de publication : 2015 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : MALE VOCALIZATION ANTIPREDATOR BEHAVIOR ALARM CALL VOCALIZATION RATE MALE DOMINANCE PREDATOR ABUNDANCE. PREDATOR CONFUSION HYPOTHESIS GROUP MAINTENANCE HYPOTHESIS PREDATION RISK ALLOCATION HYPOTHESIS LEMUR CATTA Résumé : The ring-tailed lemur (Lemur catta) is a group-living strepsirrhine primate endemic to Madagascar that faces considerable predation pressure from aerial and terrestrial predators. This species engages in mobbing and vigilance behavior in response to predators, and has referential alarm vocalizations. Because L. catta is female dominant, less is known about the alarm calls of males. We tested 3 hypotheses for male antipredator vocalization behavior on L. catta at the Bezà Mahafaly Special Reserve in Madagascar: the predator confusion, group maintenance, and predation risk allocation hypotheses. We found support for 2 hypotheses. When a male L. catta made an antipredator call, other group members vocalized in response. Dominant males did not make alarm calls at higher rates than subordinate males. Predators were more abundant on the western side of Parcel 1, but an even greater number of antipredator vocalizations occurred in this area than predator abundance warranted. We show that male L. catta consistently participated in group-level antipredator vocalization usage in high-risk locations. Although female L. catta are known to hold the primary role in group defense, male L. catta are also key participants in group-wide behaviors that may confuse or drive away predators. Titre du périodique : Folia Primatologica Volume : 86 : 124-133 En ligne : https://doi.org/10.1159/000369064 Antipredator Vocalization Usage in the Male Ring-Tailed Lemur (Lemur catta) [texte imprimé] / Laura M. Bolt ; Michelle L. Sauther ; Frank P. Cuozzo ; Ibrahim Antho Youssouf Jacky . - 2015.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : MALE VOCALIZATION ANTIPREDATOR BEHAVIOR ALARM CALL VOCALIZATION RATE MALE DOMINANCE PREDATOR ABUNDANCE. PREDATOR CONFUSION HYPOTHESIS GROUP MAINTENANCE HYPOTHESIS PREDATION RISK ALLOCATION HYPOTHESIS LEMUR CATTA Résumé : The ring-tailed lemur (Lemur catta) is a group-living strepsirrhine primate endemic to Madagascar that faces considerable predation pressure from aerial and terrestrial predators. This species engages in mobbing and vigilance behavior in response to predators, and has referential alarm vocalizations. Because L. catta is female dominant, less is known about the alarm calls of males. We tested 3 hypotheses for male antipredator vocalization behavior on L. catta at the Bezà Mahafaly Special Reserve in Madagascar: the predator confusion, group maintenance, and predation risk allocation hypotheses. We found support for 2 hypotheses. When a male L. catta made an antipredator call, other group members vocalized in response. Dominant males did not make alarm calls at higher rates than subordinate males. Predators were more abundant on the western side of Parcel 1, but an even greater number of antipredator vocalizations occurred in this area than predator abundance warranted. We show that male L. catta consistently participated in group-level antipredator vocalization usage in high-risk locations. Although female L. catta are known to hold the primary role in group defense, male L. catta are also key participants in group-wide behaviors that may confuse or drive away predators. Titre du périodique : Folia Primatologica Volume : 86 : 124-133 En ligne : https://doi.org/10.1159/000369064 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Bushmeat hunting and use in the Makira Forest, north-eastern Madagascar: a conservation and livelihoods issue / Christopher D. Golden
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Titre : Bushmeat hunting and use in the Makira Forest, north-eastern Madagascar: a conservation and livelihoods issue Type de document : texte imprimé Auteurs : Christopher D. Golden, Auteur Année de publication : 2009 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CRYPTOPROCTA FEROX EULEMUR ALBIFRONS HAPALEMUR GRISEUS INDRI INDRI LEMURS MADAGASCAR SUSTAINABILITY ASSESSMENT VARECIA VARIEGATA Résumé : In the 2003 Durban Vision the Malagasy government committed to tripling the amount of protected areas in Madagascar by 2009. This extensive expansion needs to involve an assessment of the potential impacts on the people who rely on forest resources for subsistence. Wildlife for human consumption (bushmeat) is one such resource that has received great attention on mainland Africa but has largely been ignored in Madagascar until recently. In terms of biomass, hunting in Madagascar appears to be on a lesser scale compared to areas of mainland Africa. However, because of the life-history characteristics associated with hunted primate and carnivore species in Madagascar even small-scale hunting is a major threat to long-term conservation. In this study I used semi-structured interviews to quantify annual rates of bushmeat harvest in 14 villages adjacent to the Makira Forest in north-eastern Madagascar. Interviews revealed that 23 mammal species were hunted for consumption, providing a new insight into the scale and frequency of bushmeat use. Harvest data and life-history information were sufficient to allow quantitative assessments of sustainability for four species of lemur (black and white ruffed lemur Varecia variegata, indri Indri indri, eastern bamboo lemur Hapalemur griseus and white-fronted brown lemur Eulemur albifrons) and a species of the carnivore family Eupleridae (fossa Cryptoprocta ferox). Model results suggest hunting of these species is probably unsustainable. This research presents clear evidence that hunting is a major conservation and livelihoods issue in Madagascar and needs to be considered in the planning stages of protected area development to address better the needs of local people. Titre du périodique : Oryx Volume : 43 (3): 386-392 En ligne : DOI: https://doi.org/10.1017/S0030605309000131 Bushmeat hunting and use in the Makira Forest, north-eastern Madagascar: a conservation and livelihoods issue [texte imprimé] / Christopher D. Golden, Auteur . - 2009.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CRYPTOPROCTA FEROX EULEMUR ALBIFRONS HAPALEMUR GRISEUS INDRI INDRI LEMURS MADAGASCAR SUSTAINABILITY ASSESSMENT VARECIA VARIEGATA Résumé : In the 2003 Durban Vision the Malagasy government committed to tripling the amount of protected areas in Madagascar by 2009. This extensive expansion needs to involve an assessment of the potential impacts on the people who rely on forest resources for subsistence. Wildlife for human consumption (bushmeat) is one such resource that has received great attention on mainland Africa but has largely been ignored in Madagascar until recently. In terms of biomass, hunting in Madagascar appears to be on a lesser scale compared to areas of mainland Africa. However, because of the life-history characteristics associated with hunted primate and carnivore species in Madagascar even small-scale hunting is a major threat to long-term conservation. In this study I used semi-structured interviews to quantify annual rates of bushmeat harvest in 14 villages adjacent to the Makira Forest in north-eastern Madagascar. Interviews revealed that 23 mammal species were hunted for consumption, providing a new insight into the scale and frequency of bushmeat use. Harvest data and life-history information were sufficient to allow quantitative assessments of sustainability for four species of lemur (black and white ruffed lemur Varecia variegata, indri Indri indri, eastern bamboo lemur Hapalemur griseus and white-fronted brown lemur Eulemur albifrons) and a species of the carnivore family Eupleridae (fossa Cryptoprocta ferox). Model results suggest hunting of these species is probably unsustainable. This research presents clear evidence that hunting is a major conservation and livelihoods issue in Madagascar and needs to be considered in the planning stages of protected area development to address better the needs of local people. Titre du périodique : Oryx Volume : 43 (3): 386-392 En ligne : DOI: https://doi.org/10.1017/S0030605309000131 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Captive conditions of pet lemurs in Madagascar Type de document : texte imprimé Auteurs : Kim Reuter ; Melissa S. Schaefer Année de publication : 2016 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : LEMURS MADAGASCAR AFRICA PET TRADE CAPTURE Résumé : Live extraction of wildlife is a threat to biodiversity and can compromise animal welfare standards. Studies of the captive environments and welfare of pet primates are known, but none has focused on Madagascar. We aimed to expand knowledge about the captive conditions of pet lemurs in Madagascar. We hypothesized that captive lemurs would often be kept in restrictive settings, including small cages, would be fed foods inconsistent with their natural diets and, as a result, would be in bad physical or psychological health. Data were collected via a web-based survey (n = 253 reports) and from the websites and social media pages of 25 hotels. Most lemurs seen by respondents were either kept on a rope/leash/chain or in a cage (67%), though some lemurs were habituated and were not restrained (28%). Most of the time (72%) cages were considered small, and lemurs were rarely kept in captivity together with other lemurs (81% of lemurs were caged alone). Pet lemurs were often fed foods inconsistent with their natural diets, and most (53%) were described as being in bad health. These findings point to a need to undertake outreach to pet lemur owners in Madagascar about the captivity requirements of primates. Titre du périodique : Folia Primatologica Volume : 87:48-63 En ligne : https://doi.org/10.1159/000444582 Captive conditions of pet lemurs in Madagascar [texte imprimé] / Kim Reuter ; Melissa S. Schaefer . - 2016.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : LEMURS MADAGASCAR AFRICA PET TRADE CAPTURE Résumé : Live extraction of wildlife is a threat to biodiversity and can compromise animal welfare standards. Studies of the captive environments and welfare of pet primates are known, but none has focused on Madagascar. We aimed to expand knowledge about the captive conditions of pet lemurs in Madagascar. We hypothesized that captive lemurs would often be kept in restrictive settings, including small cages, would be fed foods inconsistent with their natural diets and, as a result, would be in bad physical or psychological health. Data were collected via a web-based survey (n = 253 reports) and from the websites and social media pages of 25 hotels. Most lemurs seen by respondents were either kept on a rope/leash/chain or in a cage (67%), though some lemurs were habituated and were not restrained (28%). Most of the time (72%) cages were considered small, and lemurs were rarely kept in captivity together with other lemurs (81% of lemurs were caged alone). Pet lemurs were often fed foods inconsistent with their natural diets, and most (53%) were described as being in bad health. These findings point to a need to undertake outreach to pet lemur owners in Madagascar about the captivity requirements of primates. Titre du périodique : Folia Primatologica Volume : 87:48-63 En ligne : https://doi.org/10.1159/000444582 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Climate change, predictive modeling and lemur health: Assessing impacts of changing climate on health and conservation in Madagascar / Meredith A. Barrett
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Titre : Climate change, predictive modeling and lemur health: Assessing impacts of changing climate on health and conservation in Madagascar Type de document : texte imprimé Auteurs : Meredith A. Barrett ; Jason L. Brown ; Randall E. Junge ; Anne D. Yoder Année de publication : 2013 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CLIMATE CHANGE CONSERVATION LEMUR MADAGASCAR PARASITE SPECIES DISTRIBUTION MODELING Résumé : Deforestation and a changing climate threaten the health and survival of lemurs in Madagascar. An important component of lemur health, parasite infection can reduce fitness and survival outcomes. Future lemur parasite richness, abundance and distribution may be highly influenced by climate change. Current knowledge of lemur parasites is narrow in geographic and temporal scope, with sampling at a limited number of sites, and thus far, there have been no attempts to assess the effects of climate change on lemur parasite distributions. We used geospatial tools to predict the distributions of six lemur parasites of high frequency and pathogenic potential. We then assessed how anticipated climate shifts in Madagascar may alter the distributions of these lemur parasites in the future. Under current climate conditions, we found that the focal parasites exhibited widespread potential distributions across Madagascar, covering 12–26% of surface land area and 40–86% of forested area. Our analyses also showed that parasites responded differently to projected climate changes, with shifts ranging from a contraction of current distributions by 7% to an expansion of 60%. A predicted net expansion in parasite distribution may expose naive lemur hosts to new parasites, which could have a profound effect on lemur health. Those parasites with the greatest potential for harmful effects are predicted to experience the largest expansion in range. Predicting these changing distributions will be critical for assessing population health, improving protected area design, preparing for reintroduction efforts and addressing potential parasite risk in lemurs, humans and domestic animals. Titre du périodique : Biological Conservation Volume : 157: 409-422 En ligne : https://doi.org/10.1016/j.biocon.2012.09.003 Climate change, predictive modeling and lemur health: Assessing impacts of changing climate on health and conservation in Madagascar [texte imprimé] / Meredith A. Barrett ; Jason L. Brown ; Randall E. Junge ; Anne D. Yoder . - 2013.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CLIMATE CHANGE CONSERVATION LEMUR MADAGASCAR PARASITE SPECIES DISTRIBUTION MODELING Résumé : Deforestation and a changing climate threaten the health and survival of lemurs in Madagascar. An important component of lemur health, parasite infection can reduce fitness and survival outcomes. Future lemur parasite richness, abundance and distribution may be highly influenced by climate change. Current knowledge of lemur parasites is narrow in geographic and temporal scope, with sampling at a limited number of sites, and thus far, there have been no attempts to assess the effects of climate change on lemur parasite distributions. We used geospatial tools to predict the distributions of six lemur parasites of high frequency and pathogenic potential. We then assessed how anticipated climate shifts in Madagascar may alter the distributions of these lemur parasites in the future. Under current climate conditions, we found that the focal parasites exhibited widespread potential distributions across Madagascar, covering 12–26% of surface land area and 40–86% of forested area. Our analyses also showed that parasites responded differently to projected climate changes, with shifts ranging from a contraction of current distributions by 7% to an expansion of 60%. A predicted net expansion in parasite distribution may expose naive lemur hosts to new parasites, which could have a profound effect on lemur health. Those parasites with the greatest potential for harmful effects are predicted to experience the largest expansion in range. Predicting these changing distributions will be critical for assessing population health, improving protected area design, preparing for reintroduction efforts and addressing potential parasite risk in lemurs, humans and domestic animals. Titre du périodique : Biological Conservation Volume : 157: 409-422 En ligne : https://doi.org/10.1016/j.biocon.2012.09.003 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Competition for dead trees between humans and aye-ayes (Daubentonia madagascariensis) in central eastern Madagascar / Rose T Miller
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Titre : Competition for dead trees between humans and aye-ayes (Daubentonia madagascariensis) in central eastern Madagascar Type de document : texte imprimé Auteurs : Rose T Miller, Auteur ; Jean-Luc Raharison, Auteur ; Mitchell T. Irwin, Auteur Année de publication : 2017 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CONSERVATION DEFORESTATION FOREST DEGRADATION HABITAT LOSS RESOURCE COMPETITION Résumé : The destruction and degradation of forest habitats are major threats to the sustainability of lemur populations in Madagascar. Madagascan landscapes often contain forest fragments that represent refuges for native fauna, while also being used for firewood and timber by local human populations. As undisturbed forest becomes increasingly scarce, understanding resource competition between humans and wildlife in disturbed habitats will be increasingly important. We tested the hypothesis that Malagasy and aye-ayes (Daubentonia madagascariensis) compete for the limited number of dead trees in rainforest fragments at Tsinjoarivo, Madagascar. We surveyed 2.16 ha within five fragments (range 5-228 ha) surrounding human settlements to quantify the density of dead trees and traces of both human and aye-aye activity. Neither aye-aye nor human traces were distributed according to the availability of particular trees species, and aye-ayes and Malagasy apparently preferred several different species. Although overlap was recorded in tree species used, human use tended to be positively correlated with a species' desirability as firewood, while a negative relationship was seen for aye-ayes. Both consumers used trees of similar diameter at breast height, but those used by aye-ayes tended to be older, suggesting that human use might precede usefulness for aye-ayes. Finally, the density of dead trees and aye-aye traces were highest in smaller fragments, but human traces did not vary across fragment size. Although further study is needed to better quantify the aye-aye diet in this region, these data suggest that aye-ayes and local people compete for dead trees, and this competition could constitute a pressure on aye-aye populations. Titre du périodique : Primates Volume : 53:367-375 En ligne : DOI: 10.1007/s10329-016-0585-4 Competition for dead trees between humans and aye-ayes (Daubentonia madagascariensis) in central eastern Madagascar [texte imprimé] / Rose T Miller, Auteur ; Jean-Luc Raharison, Auteur ; Mitchell T. Irwin, Auteur . - 2017.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CONSERVATION DEFORESTATION FOREST DEGRADATION HABITAT LOSS RESOURCE COMPETITION Résumé : The destruction and degradation of forest habitats are major threats to the sustainability of lemur populations in Madagascar. Madagascan landscapes often contain forest fragments that represent refuges for native fauna, while also being used for firewood and timber by local human populations. As undisturbed forest becomes increasingly scarce, understanding resource competition between humans and wildlife in disturbed habitats will be increasingly important. We tested the hypothesis that Malagasy and aye-ayes (Daubentonia madagascariensis) compete for the limited number of dead trees in rainforest fragments at Tsinjoarivo, Madagascar. We surveyed 2.16 ha within five fragments (range 5-228 ha) surrounding human settlements to quantify the density of dead trees and traces of both human and aye-aye activity. Neither aye-aye nor human traces were distributed according to the availability of particular trees species, and aye-ayes and Malagasy apparently preferred several different species. Although overlap was recorded in tree species used, human use tended to be positively correlated with a species' desirability as firewood, while a negative relationship was seen for aye-ayes. Both consumers used trees of similar diameter at breast height, but those used by aye-ayes tended to be older, suggesting that human use might precede usefulness for aye-ayes. Finally, the density of dead trees and aye-aye traces were highest in smaller fragments, but human traces did not vary across fragment size. Although further study is needed to better quantify the aye-aye diet in this region, these data suggest that aye-ayes and local people compete for dead trees, and this competition could constitute a pressure on aye-aye populations. Titre du périodique : Primates Volume : 53:367-375 En ligne : DOI: 10.1007/s10329-016-0585-4 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Cooperative rescue and predator fatality involving a group-living strepsirrhine, Coquerel’s sifaka (Propithecus coquereli), and a Madagascar ground boa (Acrantophis madagascariensis) / Charlie J Gardner
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Titre : Cooperative rescue and predator fatality involving a group-living strepsirrhine, Coquerel’s sifaka (Propithecus coquereli), and a Madagascar ground boa (Acrantophis madagascariensis) Type de document : texte imprimé Auteurs : Charlie J Gardner ; Patrick Radolalaina ; Mahandry Rajerison ; Harry W. Greene Année de publication : 2015 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BEHAVIOR KIN SELECTION LEMUR MOBBING PREDATOR-PREY INTERACTION SNAKE Résumé : The interactions between primates and their snake predators are of interest because snakes have influenced the evolution of primate visual systems and predation has driven the evolution of primate behaviour, including group living. However, there are few accounts of primate–snake interactions in the wild. We report an incident from Northwest Madagascar in which a large female Madagascar ground boa (Acrantophis madagascariensis) captured an adult female Coquerel’s sifaka (Propithecus coquereli); upon capture, the prey’s group members proceeded to bite and scratch the snake until it released the prey, which survived. However, a broken mandible suffered by the boa during the incident led to its death by starvation 2 months later. Our observations demonstrate that, in addition to improved predator detection and deterrence (i.e., mobbing), active defence against some predators may provide an additional benefit to group living in Coquerel’s sifaka, and suggest that predation on group-living primates may be more costly for predators than attacking a solitary species of similar body size. Titre du périodique : Primates Volume : 56: 127-129 En ligne : https://doi.org/10.1007/s10329-015-0462-6 Cooperative rescue and predator fatality involving a group-living strepsirrhine, Coquerel’s sifaka (Propithecus coquereli), and a Madagascar ground boa (Acrantophis madagascariensis) [texte imprimé] / Charlie J Gardner ; Patrick Radolalaina ; Mahandry Rajerison ; Harry W. Greene . - 2015.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BEHAVIOR KIN SELECTION LEMUR MOBBING PREDATOR-PREY INTERACTION SNAKE Résumé : The interactions between primates and their snake predators are of interest because snakes have influenced the evolution of primate visual systems and predation has driven the evolution of primate behaviour, including group living. However, there are few accounts of primate–snake interactions in the wild. We report an incident from Northwest Madagascar in which a large female Madagascar ground boa (Acrantophis madagascariensis) captured an adult female Coquerel’s sifaka (Propithecus coquereli); upon capture, the prey’s group members proceeded to bite and scratch the snake until it released the prey, which survived. However, a broken mandible suffered by the boa during the incident led to its death by starvation 2 months later. Our observations demonstrate that, in addition to improved predator detection and deterrence (i.e., mobbing), active defence against some predators may provide an additional benefit to group living in Coquerel’s sifaka, and suggest that predation on group-living primates may be more costly for predators than attacking a solitary species of similar body size. Titre du périodique : Primates Volume : 56: 127-129 En ligne : https://doi.org/10.1007/s10329-015-0462-6 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Direct and Indirect Impacts of Raptor Predation on Lemurs in Southeastern Madagascar / Sarah M. Karpanty
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Titre : Direct and Indirect Impacts of Raptor Predation on Lemurs in Southeastern Madagascar Type de document : texte imprimé Auteurs : Sarah M. Karpanty Année de publication : 2006 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CONSERVATION LEMURS MADAGASCAR PREDATION RAPTORS Résumé : I calculated rates of predation by 2 species of diurnal raptors, Polyboroides radiatus and Accipiter henstii, on the lemur community of Ranomafana National Park, Madagascar from 2700 h of observation and 470 prey deliveries at 7 nests of each hawk species. The 2 hawks consumed 7 of 12 lemurs found in the park region, with a body mass of 63–3500 g and including diurnal and nocturnal species of all group sizes. Calculations of predation rates indicate that raptor predation is a significant cause of mortality for lemur populations relative to other causes. Minimum rates of predation by Polyboroides radiatus and Accipiter henstii on Microcebus rufus, Cheirogaleus major, Avahi laniger, Hapalemur griseus, Eulemur fulvus rufus, Eulemur rubriventer, and Varecia variegata resulted in the raptors removing of 1–21% of the population per yr, similar to other rates of predation on primates documented in the literature. Modeling of lemur populations under varying levels of raptor predation pressure that I calculated found that one may attribute 3–17% of adult, juvenile, and infant mortality for nocturnal lemurs and 2–66% of adult, juvenile, and infant mortality for diurnal lemurs to diurnal raptor predation. Raptor predation may significantly depress intrinsic growth rates and carrying capacity of Avahi laniger, Hapalemur griseus, Eulemur fulvus rufus, Eulemur rubriventer, and Varecia variegata owing to their low fecundities, long life spans, and long age to sexual maturation. Nocturnal lemurs may best avoid predation by diurnal raptors by exhibiting a solitary lifestyle and cryptic antipredator tactics, whereas, diurnal lemurs benefit less by increasing group size than by using specific antipredator tactics Titre du périodique : International Journal of Primatology Volume : 27( 239-261) En ligne : https://doi.org/10.1007/s10764-005-9008-x Direct and Indirect Impacts of Raptor Predation on Lemurs in Southeastern Madagascar [texte imprimé] / Sarah M. Karpanty . - 2006.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CONSERVATION LEMURS MADAGASCAR PREDATION RAPTORS Résumé : I calculated rates of predation by 2 species of diurnal raptors, Polyboroides radiatus and Accipiter henstii, on the lemur community of Ranomafana National Park, Madagascar from 2700 h of observation and 470 prey deliveries at 7 nests of each hawk species. The 2 hawks consumed 7 of 12 lemurs found in the park region, with a body mass of 63–3500 g and including diurnal and nocturnal species of all group sizes. Calculations of predation rates indicate that raptor predation is a significant cause of mortality for lemur populations relative to other causes. Minimum rates of predation by Polyboroides radiatus and Accipiter henstii on Microcebus rufus, Cheirogaleus major, Avahi laniger, Hapalemur griseus, Eulemur fulvus rufus, Eulemur rubriventer, and Varecia variegata resulted in the raptors removing of 1–21% of the population per yr, similar to other rates of predation on primates documented in the literature. Modeling of lemur populations under varying levels of raptor predation pressure that I calculated found that one may attribute 3–17% of adult, juvenile, and infant mortality for nocturnal lemurs and 2–66% of adult, juvenile, and infant mortality for diurnal lemurs to diurnal raptor predation. Raptor predation may significantly depress intrinsic growth rates and carrying capacity of Avahi laniger, Hapalemur griseus, Eulemur fulvus rufus, Eulemur rubriventer, and Varecia variegata owing to their low fecundities, long life spans, and long age to sexual maturation. Nocturnal lemurs may best avoid predation by diurnal raptors by exhibiting a solitary lifestyle and cryptic antipredator tactics, whereas, diurnal lemurs benefit less by increasing group size than by using specific antipredator tactics Titre du périodique : International Journal of Primatology Volume : 27( 239-261) En ligne : https://doi.org/10.1007/s10764-005-9008-x Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Effets de la degradation de la foret sur la population de Cheirogaleus spp. (E. Geoffroy, 1812) dans la foret littorale de Sainte-Luce (Sud-Est de Madagascar) / Tolona Herinaivo ANDRIANASOLO
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Titre : Effets de la degradation de la foret sur la population de Cheirogaleus spp. (E. Geoffroy, 1812) dans la foret littorale de Sainte-Luce (Sud-Est de Madagascar) Type de document : texte imprimé Auteurs : Tolona Herinaivo ANDRIANASOLO Editeur : Université d'Antananarivo Année de publication : 2004 Importance : 105p Présentation : 60 réf, 36ill, 32 tab Note générale : Diplôme d’Études Approfondies, Département de Paléontologie et d'Anthropologie Biologique Langues : Français (fre) Langues originales : Français (fre) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CHEIROGALEUS SPP DEGRADATION DE LA FORET MICROHABITAT HABITAT Résumé : Du mois de novembre 2000 au mois de janvier 2001, des études sur les effets de la dégradation de la forêt sur la population de Cheirogaleus spp. dans le fragment S9 de la forêt littorale de Sainte-Luce, Sud Est de Madagascar a été effectuée. Bien que le fragment d'étude soit en bonne condition, la partie intacte et la partie dégradée de celle-ci, par la méthode de relevé linéaire, basée sur la stratification de la forêt ont été délimitées. Les animaux ont été observés par la méthode de transect linéaire. La comparaison de la densité de Cheirogaleus spp. dans les deux parties de la forêt ont montré que la dégradation modérée de la forêt n'a pas eu d'effets sur la densité de l'espèce. Au niveau du microhabitat, la dégradation de la forêt se présente comme la diminution du nombre des arbres de diamètre moyen (5 ? DHP ? 9,9 cm), l’augmentation des distances entre les arbres à DHP>10 cm dans la partie dégradée et l’augmentation en nombre des végétaux dont le diamètre de la tige est inférieur à 5 cm La dégradation n’a pas eu d’effets sur les arbres à DHP?10 cm et sur la distance entre l’arbre fréquenté et l’arbre de diamètre moyen. Au niveau de l’utilisation de l’habitat, la dégradation de la forêt n’a pas eu d’effets apparents sur l’orientation et la dimension du support utilisé. Cette dégradation de la forêt n’a pas eu d’effets sur la hauteur totale de l’arbre fréquenté, les dimensions et la forme de la couronne. La dégradation de la forêt a eu des effets sur les espèces d’arbres fréquentés dans les deux parties de la forêt qui présentent un faible similarité. Les observations des espèces de lémuriens : Avahi laniger, Microcebus rufus, Eulemur collaris et Cheirogaleus spp. sympatriques dans ce fragment de forêt ont montré que ces quatre espèces ne montrent pas de compétition au niveau de la séparation de l’habitat utilisé. Les caractéristiques des microhabitats de ces espèces ont peu de différences. En ligne : http://biblio.univ-antananarivo.mg/pdfs/andrianasoloTolonaH_SN_M2_04.pdf Effets de la degradation de la foret sur la population de Cheirogaleus spp. (E. Geoffroy, 1812) dans la foret littorale de Sainte-Luce (Sud-Est de Madagascar) [texte imprimé] / Tolona Herinaivo ANDRIANASOLO . - Université d'Antananarivo, 2004 . - 105p : 60 réf, 36ill, 32 tab.
Diplôme d’Études Approfondies, Département de Paléontologie et d'Anthropologie Biologique
Langues : Français (fre) Langues originales : Français (fre)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : CHEIROGALEUS SPP DEGRADATION DE LA FORET MICROHABITAT HABITAT Résumé : Du mois de novembre 2000 au mois de janvier 2001, des études sur les effets de la dégradation de la forêt sur la population de Cheirogaleus spp. dans le fragment S9 de la forêt littorale de Sainte-Luce, Sud Est de Madagascar a été effectuée. Bien que le fragment d'étude soit en bonne condition, la partie intacte et la partie dégradée de celle-ci, par la méthode de relevé linéaire, basée sur la stratification de la forêt ont été délimitées. Les animaux ont été observés par la méthode de transect linéaire. La comparaison de la densité de Cheirogaleus spp. dans les deux parties de la forêt ont montré que la dégradation modérée de la forêt n'a pas eu d'effets sur la densité de l'espèce. Au niveau du microhabitat, la dégradation de la forêt se présente comme la diminution du nombre des arbres de diamètre moyen (5 ? DHP ? 9,9 cm), l’augmentation des distances entre les arbres à DHP>10 cm dans la partie dégradée et l’augmentation en nombre des végétaux dont le diamètre de la tige est inférieur à 5 cm La dégradation n’a pas eu d’effets sur les arbres à DHP?10 cm et sur la distance entre l’arbre fréquenté et l’arbre de diamètre moyen. Au niveau de l’utilisation de l’habitat, la dégradation de la forêt n’a pas eu d’effets apparents sur l’orientation et la dimension du support utilisé. Cette dégradation de la forêt n’a pas eu d’effets sur la hauteur totale de l’arbre fréquenté, les dimensions et la forme de la couronne. La dégradation de la forêt a eu des effets sur les espèces d’arbres fréquentés dans les deux parties de la forêt qui présentent un faible similarité. Les observations des espèces de lémuriens : Avahi laniger, Microcebus rufus, Eulemur collaris et Cheirogaleus spp. sympatriques dans ce fragment de forêt ont montré que ces quatre espèces ne montrent pas de compétition au niveau de la séparation de l’habitat utilisé. Les caractéristiques des microhabitats de ces espèces ont peu de différences. En ligne : http://biblio.univ-antananarivo.mg/pdfs/andrianasoloTolonaH_SN_M2_04.pdf Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Les effets des facteurs anthropiques sur les espèces Varecia rubra et Eulemur albifrons dans la presqu'ile Masoala / Herinantenaina Norosoa Rakotonirina
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Titre : Les effets des facteurs anthropiques sur les espèces Varecia rubra et Eulemur albifrons dans la presqu'ile Masoala Type de document : texte imprimé Auteurs : Herinantenaina Norosoa Rakotonirina Année de publication : 2013 Langues : Français (fre) Langues originales : Français (fre) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : HABITATS LEMURIENS DIURNES VARECIA RUBRA ET EULEMUR ALBIFRONS PARC NATIONAL
MASOALARésumé : L’habitat des lémuriens est gravement menacé. Celui des Varecia rubra et des
Eulemur albifrons est victime d’une déforestation. Des relevés sur les caractéristiques des
arbres et leurs conséquences sur la densité de ces lémuriens dans la partie ouest de la
péninsule de Masoala ont été apportés par ce travail. Les données brutes sont entrées dans le
logiciel Excel avant d’être analyser. 38 lémuriens ont été recensés à Ambodiforaha et 130 à
Andranobe sur un terrain de 77,78ha pour chacun. La forêt d’Ambodiforaha a subi une
destruction anthropique très intense due aux actions des villageois et à la coupe illicite des
bois précieux. Par conséquent la densité de ces lémuriens dans cette zone est très faible.
Varecia rubra fréquente surtout des arbres de grande taille (supérieure à 12m) et E. albifrons
des individus inférieurs à 12m. Ces lémuriens avec leur habitat jouent des rôles
fondamentaux sur la vie de l’Homme et de tout être vivants. La conservation de la
biodiversité doit être alors incluse dans tous les disciplines et tous les niveaux scolaires pour
qu’elle devienne une habitude pour tout le mondeEn ligne : http://biblio.univ-antananarivo.mg/pdfs/rakotonirinaHerinantenainaN_ENS_CPN_13.p [...] Les effets des facteurs anthropiques sur les espèces Varecia rubra et Eulemur albifrons dans la presqu'ile Masoala [texte imprimé] / Herinantenaina Norosoa Rakotonirina . - 2013.
Langues : Français (fre) Langues originales : Français (fre)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : HABITATS LEMURIENS DIURNES VARECIA RUBRA ET EULEMUR ALBIFRONS PARC NATIONAL
MASOALARésumé : L’habitat des lémuriens est gravement menacé. Celui des Varecia rubra et des
Eulemur albifrons est victime d’une déforestation. Des relevés sur les caractéristiques des
arbres et leurs conséquences sur la densité de ces lémuriens dans la partie ouest de la
péninsule de Masoala ont été apportés par ce travail. Les données brutes sont entrées dans le
logiciel Excel avant d’être analyser. 38 lémuriens ont été recensés à Ambodiforaha et 130 à
Andranobe sur un terrain de 77,78ha pour chacun. La forêt d’Ambodiforaha a subi une
destruction anthropique très intense due aux actions des villageois et à la coupe illicite des
bois précieux. Par conséquent la densité de ces lémuriens dans cette zone est très faible.
Varecia rubra fréquente surtout des arbres de grande taille (supérieure à 12m) et E. albifrons
des individus inférieurs à 12m. Ces lémuriens avec leur habitat jouent des rôles
fondamentaux sur la vie de l’Homme et de tout être vivants. La conservation de la
biodiversité doit être alors incluse dans tous les disciplines et tous les niveaux scolaires pour
qu’elle devienne une habitude pour tout le mondeEn ligne : http://biblio.univ-antananarivo.mg/pdfs/rakotonirinaHerinantenainaN_ENS_CPN_13.p [...] Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Evaluating effects of deforestation, hunting, and El Niño events on a threatened lemur / Amy E. Dunham ; Elizabeth M. Erhart ; Deborah J. Overdorff ; Patricia C. Wright
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Titre : Evaluating effects of deforestation, hunting, and El Niño events on a threatened lemur Type de document : texte imprimé Auteurs : Amy E. Dunham, Auteur ; Elizabeth M. Erhart, Auteur ; Deborah J. Overdorff, Auteur ; Patricia C. Wright, Auteur Année de publication : 2008 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : DEMOGRAPHY EL NINO ENDANGERED SPECIES EXTINCTION RISKS MANAGEMENT POPULATION MODELS POPULATION VIABILITY ANALYSIS PROPITHECUS ADWARDSI LEMURS MADAGASCAR Résumé : Madagascar ranks as one of the world’s top extinction hotspots because of its high endemism and high rate of habitat degradation. Global climate phenomena such as El Niño Southern Oscillations may have confounding impacts on the island’s threatened biota but these effects are less well known. We performed a demographic study of Propithecus edwardsi, a lemur inhabiting the eastern rainforest of Madagascar, to evaluate the impact of deforestation, hunting, and El Niño on its population and to re-evaluate present endangerment categorization under the IUCN. Over 18 years of demographic data, including survival and fecundity rates were used to parameterize a stochastic population model structured with three stage classes (yearlings, juveniles, and adults). Results demonstrate that hunting and deforestation are the most significant threats to the population. Analysis of several plausible scenarios and combinations of threat revealed that a 50% population decline within three generations was very likely, supporting current IUCN classification. However, the analysis also suggested that changing global cycles may pose further threat. The average fecundity of lemurs was over 65% lower during El Niño years. While not as severe as deforestation or hunting, if El Niño events remain at the current high frequency there may be negative consequences for the population. We suggest that it is most critical for this species continued survival to create more protected areas, not only to thwart hunting and deforestation, but also to give this endangered lemur a better chance to recover from and adapt to altered climate cycles in the future. Titre du périodique : Biological Conservation Volume : 14(1): 287-297 En ligne : https://doi.org/10.1016/j.biocon.2007.10.006 Evaluating effects of deforestation, hunting, and El Niño events on a threatened lemur [texte imprimé] / Amy E. Dunham, Auteur ; Elizabeth M. Erhart, Auteur ; Deborah J. Overdorff, Auteur ; Patricia C. Wright, Auteur . - 2008.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : DEMOGRAPHY EL NINO ENDANGERED SPECIES EXTINCTION RISKS MANAGEMENT POPULATION MODELS POPULATION VIABILITY ANALYSIS PROPITHECUS ADWARDSI LEMURS MADAGASCAR Résumé : Madagascar ranks as one of the world’s top extinction hotspots because of its high endemism and high rate of habitat degradation. Global climate phenomena such as El Niño Southern Oscillations may have confounding impacts on the island’s threatened biota but these effects are less well known. We performed a demographic study of Propithecus edwardsi, a lemur inhabiting the eastern rainforest of Madagascar, to evaluate the impact of deforestation, hunting, and El Niño on its population and to re-evaluate present endangerment categorization under the IUCN. Over 18 years of demographic data, including survival and fecundity rates were used to parameterize a stochastic population model structured with three stage classes (yearlings, juveniles, and adults). Results demonstrate that hunting and deforestation are the most significant threats to the population. Analysis of several plausible scenarios and combinations of threat revealed that a 50% population decline within three generations was very likely, supporting current IUCN classification. However, the analysis also suggested that changing global cycles may pose further threat. The average fecundity of lemurs was over 65% lower during El Niño years. While not as severe as deforestation or hunting, if El Niño events remain at the current high frequency there may be negative consequences for the population. We suggest that it is most critical for this species continued survival to create more protected areas, not only to thwart hunting and deforestation, but also to give this endangered lemur a better chance to recover from and adapt to altered climate cycles in the future. Titre du périodique : Biological Conservation Volume : 14(1): 287-297 En ligne : https://doi.org/10.1016/j.biocon.2007.10.006 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Evidence of Invasive Felis silvestris Predation on Propithecus verreauxi at Beza Mahafaly Special Reserve, Madagascar / Diane K. Brockman
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Titre : Evidence of Invasive Felis silvestris Predation on Propithecus verreauxi at Beza Mahafaly Special Reserve, Madagascar Type de document : texte imprimé Auteurs : Diane K. Brockman ; Laurie R. Godfrey ; Luke, J. Dollar, Auteur ; Joelisoa Ratsirarson Année de publication : 2008 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BEHAVIOR BEZA MAHAFALY SPECIAL RESERVE FELIS SYLVESTRIS PREDATION PROPITHECUS VERREAUXI SKELETAL REMAINS Résumé : Increasing evidence supports the idea that endemic avian and mammalian predators have profoundly impacted primate populations in Madagascar (Goodman, S. M. Predation on lemurs. In S. M. Goodman, & J. P. Benstead (Eds.), The natural history of Madagascar (pp. 1221–1228). Chicago: University of Chicago Press, (2003).). The role in regulating lemur populations of the 3 introduced mammalian carnivorans —small Indian civets (Viverricula indica, Desmarest 1804), domestic dogs (Canis lupus familiaris, Linnaeus 1758), and invasive wildcats (Felis silvestris, Schreber 1775)— is less clear, but recent evidence suggests that the latter 2 are becoming important predators of diurnal lemurs. We report evidence for invasive wildcat predation on sifaka (Propithecus verreauxi verreauxi) in Parcel 1 at Beza Mahafaly Special Reserve, Madagascar, including skeletal remains of apparent Propithecus sifaka victims, observations of wildcat predatory behavior, and behavioral responses of the lemurs in the presence of wildcats. Titre du périodique : International Journal of Primatology Volume : 29: 135-152 En ligne : https://doi.org/10.1007/s10764-007-9145-5 Evidence of Invasive Felis silvestris Predation on Propithecus verreauxi at Beza Mahafaly Special Reserve, Madagascar [texte imprimé] / Diane K. Brockman ; Laurie R. Godfrey ; Luke, J. Dollar, Auteur ; Joelisoa Ratsirarson . - 2008.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BEHAVIOR BEZA MAHAFALY SPECIAL RESERVE FELIS SYLVESTRIS PREDATION PROPITHECUS VERREAUXI SKELETAL REMAINS Résumé : Increasing evidence supports the idea that endemic avian and mammalian predators have profoundly impacted primate populations in Madagascar (Goodman, S. M. Predation on lemurs. In S. M. Goodman, & J. P. Benstead (Eds.), The natural history of Madagascar (pp. 1221–1228). Chicago: University of Chicago Press, (2003).). The role in regulating lemur populations of the 3 introduced mammalian carnivorans —small Indian civets (Viverricula indica, Desmarest 1804), domestic dogs (Canis lupus familiaris, Linnaeus 1758), and invasive wildcats (Felis silvestris, Schreber 1775)— is less clear, but recent evidence suggests that the latter 2 are becoming important predators of diurnal lemurs. We report evidence for invasive wildcat predation on sifaka (Propithecus verreauxi verreauxi) in Parcel 1 at Beza Mahafaly Special Reserve, Madagascar, including skeletal remains of apparent Propithecus sifaka victims, observations of wildcat predatory behavior, and behavioral responses of the lemurs in the presence of wildcats. Titre du périodique : International Journal of Primatology Volume : 29: 135-152 En ligne : https://doi.org/10.1007/s10764-007-9145-5 Exemplaires
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Titre : Illegal Trade of Wild-Captured Lemur catta within Madagascar Type de document : texte imprimé Auteurs : Marni LaFleur ; Clarke, T.A. ; Kim Reuter ; Melissa S. Schaefer ; Casey terHorst Année de publication : 2019 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : STREPSIRRHINE RING-TAILED LEMUR PET WIDLLIFE TRAFFICKING CONSERVATION Résumé : Lemur catta is the most reported illegal captive lemur. We document 286 L. catta that were held in illegal captive conditions in Madagascar. Coastal tourist destinations are “hot spots” for sightings. Many of the L. catta reported were in businesses (49%) and were perceived to be held captive for the purpose of generating income (41%). Infant/juvenile L. catta were overwhelmingly observed annually in December (41%) and may suffer high mortality rates given that they are not weaned during this month of the year. Population growth modeling suggests that known capture rates may be sustainable in all but small populations of 500 individuals and when infants/juveniles are targeted. However, of the seven remaining populations of L. catta with more than 100 individuals, only one is known to contain more than 500 animals, and we present evidence here that infants/juveniles are targeted. Moreover L. catta face significant other threats including habitat loss, bushmeat hunting, and climate change. Several actions could reduce the illegal capture and ownership of L. catta in Madagascar such as tourist behavior change initiatives, enforcement of laws, and alternative livelihoods for local people. These interventions are urgently needed and could be adapted to protect other exploited wildlife in the future Titre du périodique : Folia Primatologica Volume : 87:48-63 En ligne : https://doi.org/10.1159/000496970 Illegal Trade of Wild-Captured Lemur catta within Madagascar [texte imprimé] / Marni LaFleur ; Clarke, T.A. ; Kim Reuter ; Melissa S. Schaefer ; Casey terHorst . - 2019.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : STREPSIRRHINE RING-TAILED LEMUR PET WIDLLIFE TRAFFICKING CONSERVATION Résumé : Lemur catta is the most reported illegal captive lemur. We document 286 L. catta that were held in illegal captive conditions in Madagascar. Coastal tourist destinations are “hot spots” for sightings. Many of the L. catta reported were in businesses (49%) and were perceived to be held captive for the purpose of generating income (41%). Infant/juvenile L. catta were overwhelmingly observed annually in December (41%) and may suffer high mortality rates given that they are not weaned during this month of the year. Population growth modeling suggests that known capture rates may be sustainable in all but small populations of 500 individuals and when infants/juveniles are targeted. However, of the seven remaining populations of L. catta with more than 100 individuals, only one is known to contain more than 500 animals, and we present evidence here that infants/juveniles are targeted. Moreover L. catta face significant other threats including habitat loss, bushmeat hunting, and climate change. Several actions could reduce the illegal capture and ownership of L. catta in Madagascar such as tourist behavior change initiatives, enforcement of laws, and alternative livelihoods for local people. These interventions are urgently needed and could be adapted to protect other exploited wildlife in the future Titre du périodique : Folia Primatologica Volume : 87:48-63 En ligne : https://doi.org/10.1159/000496970 Exemplaires
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Titre : Infant Killing, Wounding and Predation in Eulemur and Lemur Type de document : texte imprimé Auteurs : Alison Jolly ; S. Caless ; Lisa Gould ; Michael E. Pereira ; A Pitts ; R.E. Pride ; H.D. Rabenandrasana ; J.D. Walker ; T. Zafison, Auteur Année de publication : 2000 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFANTICIDE SEASONAL BREEDING FEMALE AGGRESSION IMMIGRANT MALES Résumé : Infant killing by primates is highly controversial. Sexual selection of infanticidal males has been disputed, especially for seasonally breeding species, in which death of an infant does not advance conception of the next infant. We report attacks, infants found wounded, and predation in seasonally breeding Eulemur and Lemur at Berenty, Beza Mahafaly and Duke University Primate Center, and review cases seen elsewhere. Observed attacks leading to wounds or death conservatively total twelve by extratroop males, two by troop males, and seven by troop females. Eulemur are occasional vertebrate predators, whose prey includes infant Lemur catta. Wounds inflicted by lemurs are usually abdominal canine slashes or bites to the head, with rare eating, a pattern distinct from carnivore and raptor kills. Infant killing as inferred from corpses is more frequent than previously thought, but still rare. Adaptive advantages of killing plausibly include eliminating resource competitors of females, and sexual selection on males. Titre du périodique : International Journal of Primatology Volume : 21: 21-40 En ligne : https://doi.org/10.1023/A:1005467411880 Infant Killing, Wounding and Predation in Eulemur and Lemur [texte imprimé] / Alison Jolly ; S. Caless ; Lisa Gould ; Michael E. Pereira ; A Pitts ; R.E. Pride ; H.D. Rabenandrasana ; J.D. Walker ; T. Zafison, Auteur . - 2000.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFANTICIDE SEASONAL BREEDING FEMALE AGGRESSION IMMIGRANT MALES Résumé : Infant killing by primates is highly controversial. Sexual selection of infanticidal males has been disputed, especially for seasonally breeding species, in which death of an infant does not advance conception of the next infant. We report attacks, infants found wounded, and predation in seasonally breeding Eulemur and Lemur at Berenty, Beza Mahafaly and Duke University Primate Center, and review cases seen elsewhere. Observed attacks leading to wounds or death conservatively total twelve by extratroop males, two by troop males, and seven by troop females. Eulemur are occasional vertebrate predators, whose prey includes infant Lemur catta. Wounds inflicted by lemurs are usually abdominal canine slashes or bites to the head, with rare eating, a pattern distinct from carnivore and raptor kills. Infant killing as inferred from corpses is more frequent than previously thought, but still rare. Adaptive advantages of killing plausibly include eliminating resource competitors of females, and sexual selection on males. Titre du périodique : International Journal of Primatology Volume : 21: 21-40 En ligne : https://doi.org/10.1023/A:1005467411880 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Infanticide and partial cannibalism in free-ranging Coquerel’s sifaka (Propithecus coquereli) / Malcolm S. Ramsay
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Titre : Infanticide and partial cannibalism in free-ranging Coquerel’s sifaka (Propithecus coquereli) Type de document : texte imprimé Auteurs : Malcolm S. Ramsay ; Benjamin Morrison ; Samantha M. Stead Année de publication : 2020 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFATICIDE PARTIAL CANNIBALISM LEMURS PROPITHECUS MADAGASCAR Résumé : Infanticide has been observed across many primate taxa, but the extent of its occurrence is not fully understood due to difficulty in observation and uneven reporting. Several hypotheses have been proposed to explain why infanticide occurs in primates and whether it benefits some individuals within a social group. Here we report on a case of infanticide, followed by partial consumption of the infant, in a population of Coquerel’s sifaka (Propithecus coquereli) at Mariarano, Northwest Madagascar. We witnessed an adult male sifaka kill and consume part of an infant, a member of his own social group, as well as the mother’s reaction to the infanticide. Following the infanticide, the mother of the deceased infant left the social group after repeated agonistic encounters with the other group members. We evaluate how this event relates to the predictions of four common hypotheses. Further research on Coquerel’s sifaka is needed to determine the frequency of infanticide in this species, and in lemurs more generally, because infanticide is currently poorly understood in this taxon. Titre du périodique : Primates Volume : 61 :575-581 En ligne : https://doi.org/10.1007/s10329-020-00828-z Infanticide and partial cannibalism in free-ranging Coquerel’s sifaka (Propithecus coquereli) [texte imprimé] / Malcolm S. Ramsay ; Benjamin Morrison ; Samantha M. Stead . - 2020.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFATICIDE PARTIAL CANNIBALISM LEMURS PROPITHECUS MADAGASCAR Résumé : Infanticide has been observed across many primate taxa, but the extent of its occurrence is not fully understood due to difficulty in observation and uneven reporting. Several hypotheses have been proposed to explain why infanticide occurs in primates and whether it benefits some individuals within a social group. Here we report on a case of infanticide, followed by partial consumption of the infant, in a population of Coquerel’s sifaka (Propithecus coquereli) at Mariarano, Northwest Madagascar. We witnessed an adult male sifaka kill and consume part of an infant, a member of his own social group, as well as the mother’s reaction to the infanticide. Following the infanticide, the mother of the deceased infant left the social group after repeated agonistic encounters with the other group members. We evaluate how this event relates to the predictions of four common hypotheses. Further research on Coquerel’s sifaka is needed to determine the frequency of infanticide in this species, and in lemurs more generally, because infanticide is currently poorly understood in this taxon. Titre du périodique : Primates Volume : 61 :575-581 En ligne : https://doi.org/10.1007/s10329-020-00828-z Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Infanticide in Propithecus diadema edwardsi: An Evaluation of the Sexual Selection Hypothesis / Elizabeth M. Erhart
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Titre : Infanticide in Propithecus diadema edwardsi: An Evaluation of the Sexual Selection Hypothesis Type de document : texte imprimé Auteurs : Elizabeth M. Erhart, Auteur ; Deborah J. Overdorff, Auteur Année de publication : 1998 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFANTICIDE PROSIMIAN SEXUAL SELECTION MADAGASCAR Résumé : Infanticide might be described as a reproductive strategy employed by anthropoid primate males when they immigrate into new groups. But infanticide has rarely been observed in wild prosimian primates. For the Malagasy lemurs this may reflect one or more of the following: strict breeding seasons; relative monomorphism in canine tooth and body size; small group sizes; male–female dominance relations; and male–female dyads within groups. We addressed the following questions: Do prosimian males commit infanticide in circumstances similar to those in which anthropoids do? and Is there any reproductive advantage for a highly seasonal breeder to commit infanticide? To help answer these questions, we describe the death of a 24-hr-old infant male Propithecus diadema edwardsi from wounds received during a fight between his mother, her adult daughter, and a newly immigrant male. Interbirth intervals between surviving offspring are 2 years for Propithecus diadema edwardsi; therefore, a male could dramatically shorten the time between reproductive windows by killing an infant. Whether this tactic would be favored by sexual selection cannot be addressed until more information has been collected on the length of interbirth interval due to infanticide relative to that of infant death by other causes; how social factors such as stability of breeding relationships affect long-term male reproductive success; how effective female counterstrategies are to prevent infanticide and/or whether they choose to mate with males that commit infanticide; and how often males that kill infants subsequently sire infants, particularly in groups that contain a resident male. Titre du périodique : International Journal of Primatology Volume : 19 (1): 73-81 En ligne : https://doi.org/10.1023/A:1020306910493 Infanticide in Propithecus diadema edwardsi: An Evaluation of the Sexual Selection Hypothesis [texte imprimé] / Elizabeth M. Erhart, Auteur ; Deborah J. Overdorff, Auteur . - 1998.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : INFANTICIDE PROSIMIAN SEXUAL SELECTION MADAGASCAR Résumé : Infanticide might be described as a reproductive strategy employed by anthropoid primate males when they immigrate into new groups. But infanticide has rarely been observed in wild prosimian primates. For the Malagasy lemurs this may reflect one or more of the following: strict breeding seasons; relative monomorphism in canine tooth and body size; small group sizes; male–female dominance relations; and male–female dyads within groups. We addressed the following questions: Do prosimian males commit infanticide in circumstances similar to those in which anthropoids do? and Is there any reproductive advantage for a highly seasonal breeder to commit infanticide? To help answer these questions, we describe the death of a 24-hr-old infant male Propithecus diadema edwardsi from wounds received during a fight between his mother, her adult daughter, and a newly immigrant male. Interbirth intervals between surviving offspring are 2 years for Propithecus diadema edwardsi; therefore, a male could dramatically shorten the time between reproductive windows by killing an infant. Whether this tactic would be favored by sexual selection cannot be addressed until more information has been collected on the length of interbirth interval due to infanticide relative to that of infant death by other causes; how social factors such as stability of breeding relationships affect long-term male reproductive success; how effective female counterstrategies are to prevent infanticide and/or whether they choose to mate with males that commit infanticide; and how often males that kill infants subsequently sire infants, particularly in groups that contain a resident male. Titre du périodique : International Journal of Primatology Volume : 19 (1): 73-81 En ligne : https://doi.org/10.1023/A:1020306910493 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Influences des Pressions Anthropiques sur les Lémuriens d’Anantaka, dans la Partie Est du Plateau de Makira, Maroantsetra, Madagascar / D. Rasolofoson
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Titre : Influences des Pressions Anthropiques sur les Lémuriens d’Anantaka, dans la Partie Est du Plateau de Makira, Maroantsetra, Madagascar Type de document : texte imprimé Auteurs : D. Rasolofoson, Auteur ; G. Rakotondratsimba, Auteur ; O. Rakotonirainy, Auteur ; LMA Rakotozafy, Auteur ; JH Ratsimbazafy, Auteur ; L Rabetafika, Auteur ; RM Randrianarison, Auteur Année de publication : 2007 Langues : Français (fre) Langues originales : Français (fre) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : ACTIVITES HUMAINES, LEMURIENS MAKIRA MADAGASCAR Résumé : L’équipe de Groupe d’Etude et de Recherche sur les Primates de Madagascar (GERP), pour contribuer dans la protection, a prospecté et suivi 12 sites dans la forêt de Makira dont Anantaka pendant les mois de septembre et octobre 2005 et 2006. A l’aide des lignes - inventaire, la densité relative de la population de lémuriens a été obtenue par des observations directes tandis que les pressions humaines ont été inventoriées par l‘évaluation des surfaces d‘incidence des activités humaines. Des activités anthropiques sur les lémuriens ont été identifiées. Les influences de chaque type de pression sur les espèces de Lémuriens (trois diurnes strictes, une cathémérale et dix nocturnes) répertoriées à travers 12 sites ont été analysées à partir du coefficient de corrélation R de Spearman entre chaque facteur menaçant par rapport à chaque effectif de lémurien. Ainsi, d’une part, on a déduit que le site d’Anantaka, avec ses 14 espèces lémuriennes, est le plus riche en espèces de lémuriens. Et d’autre part, on a constaté que plus le nombre de village est abondant et plus leur distance par rapport à la forêt est rapprochée et que les impacts de pression sur l’écosystème forestier augmente avec des activités relatives comme la chasse, les coupes illicites, les défrichements de la forêt primaire, les défrichements des forêts secondaires et la transformation des forêts en tavy ou en kijana (prairie) ainsi que les exploitations minières illicites. A part cette dégradation de la biodiversité, la décadence de la moralité à la fois sur les notions du civisme et le concept du fady (tabou) en l’encontre des Aye aye par exemple, se trouve sur une situation bouleversante, puisque les gens ne considèrent plus ni les valeurs culturelles pour la conservation de la forêt ni les lois régissant la gestion forestière et les chasses des animaux sauvages. Ces critères classifient le site d’Anantaka dans la cible focale de conservation du fait que la couverture forestière d’Anantaka présente encore 75 % de forêt, 25 % est transformée en savoka et en prairie. C’est ainsi que l’indispensablement d’une priorité en matière de conservation des lémuriens pour conserver la niche écologique exceptionnelle d’Anantaka. La conservation de Makira serait optimale avec l’intégration de la population riveraine du site d’Anantaka dans la gestion rationnelle de leurs ressources naturelles et avec l’intervention de l’éducation environnementale dans quelques localités dont les Communautés de base (COBA) et avec l’appui technique émanant des associations dans l’élaboration d’un plan de développement touchant surtout l’agriculture et d’un projet qui assurera la surveillance et le contrôle du secteur par des missions de suivi - évaluation Titre du périodique : Madagascar Conservation & Development Volume : 2 (1) En ligne : DOI: 10.4314/mcd.v2i1.44126 Influences des Pressions Anthropiques sur les Lémuriens d’Anantaka, dans la Partie Est du Plateau de Makira, Maroantsetra, Madagascar [texte imprimé] / D. Rasolofoson, Auteur ; G. Rakotondratsimba, Auteur ; O. Rakotonirainy, Auteur ; LMA Rakotozafy, Auteur ; JH Ratsimbazafy, Auteur ; L Rabetafika, Auteur ; RM Randrianarison, Auteur . - 2007.
Langues : Français (fre) Langues originales : Français (fre)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : ACTIVITES HUMAINES, LEMURIENS MAKIRA MADAGASCAR Résumé : L’équipe de Groupe d’Etude et de Recherche sur les Primates de Madagascar (GERP), pour contribuer dans la protection, a prospecté et suivi 12 sites dans la forêt de Makira dont Anantaka pendant les mois de septembre et octobre 2005 et 2006. A l’aide des lignes - inventaire, la densité relative de la population de lémuriens a été obtenue par des observations directes tandis que les pressions humaines ont été inventoriées par l‘évaluation des surfaces d‘incidence des activités humaines. Des activités anthropiques sur les lémuriens ont été identifiées. Les influences de chaque type de pression sur les espèces de Lémuriens (trois diurnes strictes, une cathémérale et dix nocturnes) répertoriées à travers 12 sites ont été analysées à partir du coefficient de corrélation R de Spearman entre chaque facteur menaçant par rapport à chaque effectif de lémurien. Ainsi, d’une part, on a déduit que le site d’Anantaka, avec ses 14 espèces lémuriennes, est le plus riche en espèces de lémuriens. Et d’autre part, on a constaté que plus le nombre de village est abondant et plus leur distance par rapport à la forêt est rapprochée et que les impacts de pression sur l’écosystème forestier augmente avec des activités relatives comme la chasse, les coupes illicites, les défrichements de la forêt primaire, les défrichements des forêts secondaires et la transformation des forêts en tavy ou en kijana (prairie) ainsi que les exploitations minières illicites. A part cette dégradation de la biodiversité, la décadence de la moralité à la fois sur les notions du civisme et le concept du fady (tabou) en l’encontre des Aye aye par exemple, se trouve sur une situation bouleversante, puisque les gens ne considèrent plus ni les valeurs culturelles pour la conservation de la forêt ni les lois régissant la gestion forestière et les chasses des animaux sauvages. Ces critères classifient le site d’Anantaka dans la cible focale de conservation du fait que la couverture forestière d’Anantaka présente encore 75 % de forêt, 25 % est transformée en savoka et en prairie. C’est ainsi que l’indispensablement d’une priorité en matière de conservation des lémuriens pour conserver la niche écologique exceptionnelle d’Anantaka. La conservation de Makira serait optimale avec l’intégration de la population riveraine du site d’Anantaka dans la gestion rationnelle de leurs ressources naturelles et avec l’intervention de l’éducation environnementale dans quelques localités dont les Communautés de base (COBA) et avec l’appui technique émanant des associations dans l’élaboration d’un plan de développement touchant surtout l’agriculture et d’un projet qui assurera la surveillance et le contrôle du secteur par des missions de suivi - évaluation Titre du périodique : Madagascar Conservation & Development Volume : 2 (1) En ligne : DOI: 10.4314/mcd.v2i1.44126 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Live capture and ownership of lemurs in Madagascar: extent and conservation implications / Kim Reuter
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Titre : Live capture and ownership of lemurs in Madagascar: extent and conservation implications Type de document : texte imprimé Auteurs : Kim Reuter, Auteur ; Haley Gilles, Auteur ; Abigail R. Wills, Auteur ; Brent J. Sewall, Auteur Année de publication : 2015 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : AFRICA CONSERVATION LIVE CAPTURE PET PRIMATE WILDLIFE TRADE Résumé : Overexploitation is a significant threat to biodiversity, with live capture of millions of animals annually. An improved understanding of live capture of primates is needed, especially for Madagascar's threatened lemurs. Our objectives were to provide the first quantitative estimates of the prevalence, spatial extent, correlates and timing of lemur ownership, procurement methods, within-country movements, and numbers and duration of ownership. Using semi-structured interviews of 1,093 households and 61 transporters, across 17 study sites, we found that lemur ownership was widespread and affected a variety of taxa. We estimate that 28,253 lemurs have been affected since 2010. Most lemurs were caught by owners and kept for either short (? 1 week) or long (? 3 years) periods. The live capture of lemurs in Madagascar is not highly organized but may threaten several Endangered and Critically Endangered species. Titre du périodique : Oryx Volume : 50(2): 344-354 En ligne : https://doi.org/10.1017/S003060531400074X Live capture and ownership of lemurs in Madagascar: extent and conservation implications [texte imprimé] / Kim Reuter, Auteur ; Haley Gilles, Auteur ; Abigail R. Wills, Auteur ; Brent J. Sewall, Auteur . - 2015.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : AFRICA CONSERVATION LIVE CAPTURE PET PRIMATE WILDLIFE TRADE Résumé : Overexploitation is a significant threat to biodiversity, with live capture of millions of animals annually. An improved understanding of live capture of primates is needed, especially for Madagascar's threatened lemurs. Our objectives were to provide the first quantitative estimates of the prevalence, spatial extent, correlates and timing of lemur ownership, procurement methods, within-country movements, and numbers and duration of ownership. Using semi-structured interviews of 1,093 households and 61 transporters, across 17 study sites, we found that lemur ownership was widespread and affected a variety of taxa. We estimate that 28,253 lemurs have been affected since 2010. Most lemurs were caught by owners and kept for either short (? 1 week) or long (? 3 years) periods. The live capture of lemurs in Madagascar is not highly organized but may threaten several Endangered and Critically Endangered species. Titre du périodique : Oryx Volume : 50(2): 344-354 En ligne : https://doi.org/10.1017/S003060531400074X Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : A National-Level Assessment of Lemur Hunting Pressure in Madagascar Type de document : texte imprimé Auteurs : Cortini Borgerson, Auteur ; Steig E. Johnson, Auteur ; Emma Hall, Auteur ; Kerry A. Brown, Auteur ; Pamela R. Narvaez-Torres, Auteur ; Be Jean Rodolph Rasolofoniaina, Auteur ; Be Noel Razafindrapaoly, Auteur ; Samuel D. Merson, Auteur ; Katherine E.T. Thompson, Auteur ; Sheila M Holmes, Auteur ; Edward E. Louis Jr, Auteur ; Christopher D. Golden, Auteur Année de publication : 2021 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT HUNTING LEMURS MADAGASCAR PRIMATE WIDLLIFE Résumé : Hunting is one of the greatest threats to nonhuman primates worldwide. Despite Madagascar’s status as a primate mega-diversity country, a critical lack of information on the hunting of lemurs at the national scale persists. Here, we synthesize the current state of knowledge of the annual rates of household-level lemur hunting near ten protected areas, representing most ecoregions in Madagascar. We examine geographic and taxonomic variation in lemur hunting, including an analysis of hunting relative to species density, extinction risk, and intrinsic ecological characteristics of species. We found that lemurs are commonly hunted across Madagascar; the rural households in our study ate, on average, more than one lemur each year, or a median of 4.1% of the lemur species’ population size where densities are known. However, this pressure varied significantly across sites and species, reaching its highest levels in the northeastern rainforest region. While hunting levels are concerning for numerous threatened species, hunting pressure was driven primarily by species availability, and among ecological traits, small body size was related to increased hunting; however, conservation status showed no such relationship. This first national-level assessment of hunting, including one-third of Madagascar’s lemur species and more than a tenth of the world’s primates, identifies regional variation and lemur taxa at acute risk from hunting—important steps toward developing targeted strategies to conserve one of the world’s most threatened groups of vertebrates. Titre du périodique : International Journal of Primatology Volume : 43: 92-113 En ligne : https://doi.org/10.1007/s10764-021-00215-5 A National-Level Assessment of Lemur Hunting Pressure in Madagascar [texte imprimé] / Cortini Borgerson, Auteur ; Steig E. Johnson, Auteur ; Emma Hall, Auteur ; Kerry A. Brown, Auteur ; Pamela R. Narvaez-Torres, Auteur ; Be Jean Rodolph Rasolofoniaina, Auteur ; Be Noel Razafindrapaoly, Auteur ; Samuel D. Merson, Auteur ; Katherine E.T. Thompson, Auteur ; Sheila M Holmes, Auteur ; Edward E. Louis Jr, Auteur ; Christopher D. Golden, Auteur . - 2021.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT HUNTING LEMURS MADAGASCAR PRIMATE WIDLLIFE Résumé : Hunting is one of the greatest threats to nonhuman primates worldwide. Despite Madagascar’s status as a primate mega-diversity country, a critical lack of information on the hunting of lemurs at the national scale persists. Here, we synthesize the current state of knowledge of the annual rates of household-level lemur hunting near ten protected areas, representing most ecoregions in Madagascar. We examine geographic and taxonomic variation in lemur hunting, including an analysis of hunting relative to species density, extinction risk, and intrinsic ecological characteristics of species. We found that lemurs are commonly hunted across Madagascar; the rural households in our study ate, on average, more than one lemur each year, or a median of 4.1% of the lemur species’ population size where densities are known. However, this pressure varied significantly across sites and species, reaching its highest levels in the northeastern rainforest region. While hunting levels are concerning for numerous threatened species, hunting pressure was driven primarily by species availability, and among ecological traits, small body size was related to increased hunting; however, conservation status showed no such relationship. This first national-level assessment of hunting, including one-third of Madagascar’s lemur species and more than a tenth of the world’s primates, identifies regional variation and lemur taxa at acute risk from hunting—important steps toward developing targeted strategies to conserve one of the world’s most threatened groups of vertebrates. Titre du périodique : International Journal of Primatology Volume : 43: 92-113 En ligne : https://doi.org/10.1007/s10764-021-00215-5 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Novel approach for quantifying illegal bushmeat consumption reveals high consumption of protected species in Madagascar / Julie H. Razafimanahaka
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Titre : Novel approach for quantifying illegal bushmeat consumption reveals high consumption of protected species in Madagascar Type de document : texte imprimé Auteurs : Julie H. Razafimanahaka ; Richard K. B. Jenkins ; Daudet Andriafidison ; Felicien Randrianandrianina ; Victor Rakotomboavonjy ; Aidan Keane ; Julia P.G. Jones Année de publication : 2012 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT CONSERVATION EFFECTIVENESS ENFORCEMENT HUNTING LEMUR MADAGASCAR POACHING RANDOMIZED RESPONSE TECHNIQUE Résumé : Information on the extent of bushmeat hunting is needed to assess the likely impact on hunted species, to provide information on the opportunity cost to local people of conservation, and to judge the efficacy of interventions at reducing pressure. However, where hunting is illegal, or socially unacceptable, respondents may not answer honestly to direct questions about hunting or consumption of bushmeat. We adapted a specialized method for investigating sensitive behaviours (the randomized response technique, RRT) and questioned 1,851 people in Madagascar about their consumption of six species, using either RRT or direct questions. For most species at most sites RRT and direct questions returned similar estimates of the proportion of the population who had consumed bushmeat in the previous year. However, RRT resulted in significantly higher estimates of bushmeat consumption in communities surrounding a protected area, where conservation activities made such questions sensitive. RRT has been predominately used in Europe and the USA; we demonstrate that it can provide a valuable approach for studying rule-breaking among people with poor literacy in low income countries. Between 12 and 33% of people across our sites had eaten brown lemur (Eulemur spp.), and 12–29% had eaten sifaka (Propithecus spp.) in the previous year. These results add to the growing body of evidence that hunting of protected species in Madagascar is a serious problem requiring urgent action. Conservation interventions to tackle bushmeat hunting will make questions about hunting or consumption more sensitive, increasing the need for researchers to use appropriate approaches for asking sensitive questions. Titre du périodique : Oryx Volume : 46(4): 584-592 En ligne : https://doi.org/10.1017/S0030605312000579 Novel approach for quantifying illegal bushmeat consumption reveals high consumption of protected species in Madagascar [texte imprimé] / Julie H. Razafimanahaka ; Richard K. B. Jenkins ; Daudet Andriafidison ; Felicien Randrianandrianina ; Victor Rakotomboavonjy ; Aidan Keane ; Julia P.G. Jones . - 2012.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT CONSERVATION EFFECTIVENESS ENFORCEMENT HUNTING LEMUR MADAGASCAR POACHING RANDOMIZED RESPONSE TECHNIQUE Résumé : Information on the extent of bushmeat hunting is needed to assess the likely impact on hunted species, to provide information on the opportunity cost to local people of conservation, and to judge the efficacy of interventions at reducing pressure. However, where hunting is illegal, or socially unacceptable, respondents may not answer honestly to direct questions about hunting or consumption of bushmeat. We adapted a specialized method for investigating sensitive behaviours (the randomized response technique, RRT) and questioned 1,851 people in Madagascar about their consumption of six species, using either RRT or direct questions. For most species at most sites RRT and direct questions returned similar estimates of the proportion of the population who had consumed bushmeat in the previous year. However, RRT resulted in significantly higher estimates of bushmeat consumption in communities surrounding a protected area, where conservation activities made such questions sensitive. RRT has been predominately used in Europe and the USA; we demonstrate that it can provide a valuable approach for studying rule-breaking among people with poor literacy in low income countries. Between 12 and 33% of people across our sites had eaten brown lemur (Eulemur spp.), and 12–29% had eaten sifaka (Propithecus spp.) in the previous year. These results add to the growing body of evidence that hunting of protected species in Madagascar is a serious problem requiring urgent action. Conservation interventions to tackle bushmeat hunting will make questions about hunting or consumption more sensitive, increasing the need for researchers to use appropriate approaches for asking sensitive questions. Titre du périodique : Oryx Volume : 46(4): 584-592 En ligne : https://doi.org/10.1017/S0030605312000579 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Past environmental changes affected lemur population dynamics prior to human impact in Madagascar / Helena Teixeira
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Titre : Past environmental changes affected lemur population dynamics prior to human impact in Madagascar Type de document : texte imprimé Auteurs : Helena Teixeira ; Vincent Montade ; Jordi Salmona ; Julia Metzger ; Laurent Bremond ; Thomas Kasper ; Gerhard Daut ; Sylvie Rouland ; Sandratrinirainy Ranarilalatiana ; Lounès Chikhi ; Hermann Behling ; Rakotondravony, Romule- Radespiel, Ute Année de publication : 2021 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : MICROCEBUS ARNHOLDI ENVRIONMENTAL CHANGE MADAGASCAR ANTROPOGENIC IMPACT Résumé : Quaternary climatic changes have been invoked as important drivers of species diversification worldwide. However, the impact of such changes on vegetation and animal population dynamics in tropical regions remains debated. To overcome this uncertainty, we integrated high-resolution paleoenvironmental reconstructions from a sedimentary record covering the past 25,000 years with demographic inferences of a forest-dwelling primate species (Microcebus arnholdi), in northern Madagascar. Result comparisons suggest that climate changes through the African Humid Period (15.2 – 5.5 kyr) strongly affected the demographic dynamics of M. arnholdi. We further inferred a population decline in the last millennium which was likely shaped by the combination of climatic and anthropogenic impacts. Our findings demonstrate that population fluctuations in Malagasy wildlife were substantial prior to a significant human impact. This provides a critical knowledge of climatically driven, environmental and ecological changes in the past, which is essential to better understand the dynamics and resilience of current biodiversity. Titre du périodique : Communications Biology Volume : 4 : 1084 En ligne : https://doi.org/10.1038/s42003-021-02620-1 Past environmental changes affected lemur population dynamics prior to human impact in Madagascar [texte imprimé] / Helena Teixeira ; Vincent Montade ; Jordi Salmona ; Julia Metzger ; Laurent Bremond ; Thomas Kasper ; Gerhard Daut ; Sylvie Rouland ; Sandratrinirainy Ranarilalatiana ; Lounès Chikhi ; Hermann Behling ; Rakotondravony, Romule- Radespiel, Ute . - 2021.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : MICROCEBUS ARNHOLDI ENVRIONMENTAL CHANGE MADAGASCAR ANTROPOGENIC IMPACT Résumé : Quaternary climatic changes have been invoked as important drivers of species diversification worldwide. However, the impact of such changes on vegetation and animal population dynamics in tropical regions remains debated. To overcome this uncertainty, we integrated high-resolution paleoenvironmental reconstructions from a sedimentary record covering the past 25,000 years with demographic inferences of a forest-dwelling primate species (Microcebus arnholdi), in northern Madagascar. Result comparisons suggest that climate changes through the African Humid Period (15.2 – 5.5 kyr) strongly affected the demographic dynamics of M. arnholdi. We further inferred a population decline in the last millennium which was likely shaped by the combination of climatic and anthropogenic impacts. Our findings demonstrate that population fluctuations in Malagasy wildlife were substantial prior to a significant human impact. This provides a critical knowledge of climatically driven, environmental and ecological changes in the past, which is essential to better understand the dynamics and resilience of current biodiversity. Titre du périodique : Communications Biology Volume : 4 : 1084 En ligne : https://doi.org/10.1038/s42003-021-02620-1 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Predation on Hapalemur griseus griseus by Boa manditra (Boidae) in the Littoral Forest of Eastern Madagascar / Daniel Rakotondravony
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Titre : Predation on Hapalemur griseus griseus by Boa manditra (Boidae) in the Littoral Forest of Eastern Madagascar Type de document : texte imprimé Auteurs : Daniel Rakotondravony ; Goodman, Steven M. ; Voahangy Soarimalala Année de publication : 1998 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : HAPALEMUR GRISEUS GRISEUS BAMBOO LEMUR MADAGASCAR BOIDAE BOA MANDITRA PREDATOR Résumé : Over the past decade it has become abundantly clear that levels of predation on lemurs are much higher than previously surmised. These predators vary from large carnivores (Cryptoprocta ferox) that prey on large diurnal and medium-sized nocturnal primates smaller diurnal carnivores (e.g. Galidia elegans)that take nocturnal primates from day nests , and diurnal birds of prey (e.g. Polyboroides radiatus, Buteo brachypterus, Accipiter henstii)that feed on both nocturnal and diurnal lemurs to nocturnal owls (e.g. Tyto alba, T. soumagnei, Asio madagascariensis)that feed on small to medium-sized nocturnal primates . In addition, snakes, particularly boa constrictors, have been reported to feed on Malagasy prosimians , although well documented acts of predation are few. Herein we report an incident of snake predation on the gentle bamboo lemur (Hapalemur griseus griseus. Titre du périodique : Folia Primatologica Volume : 69: 405-408 En ligne : https://doi.org/10.1159/000021662 Predation on Hapalemur griseus griseus by Boa manditra (Boidae) in the Littoral Forest of Eastern Madagascar [texte imprimé] / Daniel Rakotondravony ; Goodman, Steven M. ; Voahangy Soarimalala . - 1998.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : HAPALEMUR GRISEUS GRISEUS BAMBOO LEMUR MADAGASCAR BOIDAE BOA MANDITRA PREDATOR Résumé : Over the past decade it has become abundantly clear that levels of predation on lemurs are much higher than previously surmised. These predators vary from large carnivores (Cryptoprocta ferox) that prey on large diurnal and medium-sized nocturnal primates smaller diurnal carnivores (e.g. Galidia elegans)that take nocturnal primates from day nests , and diurnal birds of prey (e.g. Polyboroides radiatus, Buteo brachypterus, Accipiter henstii)that feed on both nocturnal and diurnal lemurs to nocturnal owls (e.g. Tyto alba, T. soumagnei, Asio madagascariensis)that feed on small to medium-sized nocturnal primates . In addition, snakes, particularly boa constrictors, have been reported to feed on Malagasy prosimians , although well documented acts of predation are few. Herein we report an incident of snake predation on the gentle bamboo lemur (Hapalemur griseus griseus. Titre du périodique : Folia Primatologica Volume : 69: 405-408 En ligne : https://doi.org/10.1159/000021662 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Vigilance induite et épiage interspécifique d'Eulemur rufifrons envers la communauté aviaire de la foret de Kirindy/CNFEREF, Morondava / Tolotra Finaritra Randimbiarison
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Titre : Vigilance induite et épiage interspécifique d'Eulemur rufifrons envers la communauté aviaire de la foret de Kirindy/CNFEREF, Morondava Type de document : texte imprimé Auteurs : Tolotra Finaritra Randimbiarison Editeur : Université d'Antananarivo Année de publication : 2019 Importance : 46p Présentation : 94réf, 11ill, 5 tab Note générale : Master, Faculté des Sciences, Mention Zoologie et Biodiversité Animale Langues : Français (fre) Langues originales : Français (fre) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : EULEMUR RUFIFRONS VIGILANCE EPIAGE INTERSPECIFIQUE PLAYBACK PREDATION CRIS D’ALARME KIRINDY/CNFEREF Résumé : Les primates utilisent plusieurs stratégies pour lutter contre la prédation. Le lémur à front
roux, Eulemur rufifrons en adopte plusieurs dont la vigilance et l’épiage interspécifique. La capacité
de cette espèce à discerner les cris d’alarmes d’animaux autre que les lémuriens n’a jamais été testée.
Cette étude vise à explorer la capacité de cette espèce à reconnaître les cris d’alarme des oiseaux
sympatriques de la forêt de Kirindy/CNFEREF durant la saison des pluies. En outre, elle vise
également à évaluer l’influence du sexe, de la position spatiale de l’individu et de l’environnement
sur sa vigilance. Des vocalisations de prédateurs aériens de ce lémurien ont été présentées sur des
oiseaux avec qui il partage des prédateurs en commun. Les réponses potentielles obtenues, en plus de
vocalisations contrôles et celles de prédateurs ont été présentées sur 16 lémurs à front roux. Des
observations sur les déclencheurs de vigilance ont été également effectuées. Eulemur rufifrons a réagi
par une vigilance importante en scrutant le ciel pour les prédateurs aériens (Polyboroïdes radiatus
7,68 ± 3,68 s ; Buteo brachypterus : 9,02 ± 4,43 s). Eulemur rufifrons rufifrons arrive effectivement
à reconnaitre les cris d’alarmes du drongo malgache (Dicrurus forficatus : : 8,90 ± 6,56 s). Elles
provoquent chez E. rufifrons une vigilance importante en scrutant dans toutes les directions. Ce type
de réaction montre que ces cris d’alarme est perçu par E. rufifrons comme un danger plus général
qu’une présence d’un prédateur aérien. Ni le sexe, ni la position spatiale de l’individu, ni
l’environnement n’influence la vigilance induite d’E. rufifrons. Mise à part les individus de mêmes
espèces, ce sont les oiseaux qui induisent le plus de réaction de vigilance chez E. rufifrons. Cela
suggère que la pression d’un prédateur en commun est suffisante pour le développement d’une
reconnaissance interspécifique oiseaux-lémurien, de cris d’alarmeEn ligne : http://biblio.univ-antananarivo.mg/pdfs/randimbiarisonTolotraF_SN_MAST_19.pdf Vigilance induite et épiage interspécifique d'Eulemur rufifrons envers la communauté aviaire de la foret de Kirindy/CNFEREF, Morondava [texte imprimé] / Tolotra Finaritra Randimbiarison . - Université d'Antananarivo, 2019 . - 46p : 94réf, 11ill, 5 tab.
Master, Faculté des Sciences, Mention Zoologie et Biodiversité Animale
Langues : Français (fre) Langues originales : Français (fre)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : EULEMUR RUFIFRONS VIGILANCE EPIAGE INTERSPECIFIQUE PLAYBACK PREDATION CRIS D’ALARME KIRINDY/CNFEREF Résumé : Les primates utilisent plusieurs stratégies pour lutter contre la prédation. Le lémur à front
roux, Eulemur rufifrons en adopte plusieurs dont la vigilance et l’épiage interspécifique. La capacité
de cette espèce à discerner les cris d’alarmes d’animaux autre que les lémuriens n’a jamais été testée.
Cette étude vise à explorer la capacité de cette espèce à reconnaître les cris d’alarme des oiseaux
sympatriques de la forêt de Kirindy/CNFEREF durant la saison des pluies. En outre, elle vise
également à évaluer l’influence du sexe, de la position spatiale de l’individu et de l’environnement
sur sa vigilance. Des vocalisations de prédateurs aériens de ce lémurien ont été présentées sur des
oiseaux avec qui il partage des prédateurs en commun. Les réponses potentielles obtenues, en plus de
vocalisations contrôles et celles de prédateurs ont été présentées sur 16 lémurs à front roux. Des
observations sur les déclencheurs de vigilance ont été également effectuées. Eulemur rufifrons a réagi
par une vigilance importante en scrutant le ciel pour les prédateurs aériens (Polyboroïdes radiatus
7,68 ± 3,68 s ; Buteo brachypterus : 9,02 ± 4,43 s). Eulemur rufifrons rufifrons arrive effectivement
à reconnaitre les cris d’alarmes du drongo malgache (Dicrurus forficatus : : 8,90 ± 6,56 s). Elles
provoquent chez E. rufifrons une vigilance importante en scrutant dans toutes les directions. Ce type
de réaction montre que ces cris d’alarme est perçu par E. rufifrons comme un danger plus général
qu’une présence d’un prédateur aérien. Ni le sexe, ni la position spatiale de l’individu, ni
l’environnement n’influence la vigilance induite d’E. rufifrons. Mise à part les individus de mêmes
espèces, ce sont les oiseaux qui induisent le plus de réaction de vigilance chez E. rufifrons. Cela
suggère que la pression d’un prédateur en commun est suffisante pour le développement d’une
reconnaissance interspécifique oiseaux-lémurien, de cris d’alarmeEn ligne : http://biblio.univ-antananarivo.mg/pdfs/randimbiarisonTolotraF_SN_MAST_19.pdf Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Who hunts lemurs and why they hunt them / Cortini Borgerson ; Margaret A. McKean ; Michael R. Sutherland ; Laurie R. Godfrey
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Titre : Who hunts lemurs and why they hunt them Type de document : texte imprimé Auteurs : Cortini Borgerson, Auteur ; Margaret A. McKean, Auteur ; Michael R. Sutherland, Auteur ; Laurie R. Godfrey, Auteur Année de publication : 2016 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT LEMURS CONSERVATION HUNTING HUMAN HEALTH CHILD MALNUTRITION POVERTY MASOALA MADAGASCAR Résumé : The main threats to lemurs are habitat loss and hunting. Conservation policies often assume that people will decrease lemur hunting if they understand government prohibitions on hunting, are educated and/or involved in ecotourism, have access to affordable meat, and/or are healthy and financially secure. Yet these assumptions are often not well tested where conservation policies are implemented. We interviewed every member of a focal village in one of the most biodiverse places on earth, the Masoala peninsula of Madagascar. The factors that best predicted the decision to hunt lemurs were poverty, poor health, and child malnutrition. Knowledge of laws, level of education, involvement in ecotourism, traditional cultural values, taste preferences, opportunity, and human–wildlife conflict had no impact on lemur hunting. Our results suggest that the welfare of humans and lemurs are linked. The key to discouraging illegal hunting and improving the viability of Endangered lemur populations may be improving rural human health and welfare. Titre du périodique : Biological Conservation Volume : 197 : 124-130 En ligne : https://doi.org/10.1016/j.biocon.2016.02.012 Who hunts lemurs and why they hunt them [texte imprimé] / Cortini Borgerson, Auteur ; Margaret A. McKean, Auteur ; Michael R. Sutherland, Auteur ; Laurie R. Godfrey, Auteur . - 2016.
Langues : Anglais (eng) Langues originales : Anglais (eng)
Catégories : LEMURIENS
LEMURIENS:Menaces et PressionsMots-clés : BUSHMEAT LEMURS CONSERVATION HUNTING HUMAN HEALTH CHILD MALNUTRITION POVERTY MASOALA MADAGASCAR Résumé : The main threats to lemurs are habitat loss and hunting. Conservation policies often assume that people will decrease lemur hunting if they understand government prohibitions on hunting, are educated and/or involved in ecotourism, have access to affordable meat, and/or are healthy and financially secure. Yet these assumptions are often not well tested where conservation policies are implemented. We interviewed every member of a focal village in one of the most biodiverse places on earth, the Masoala peninsula of Madagascar. The factors that best predicted the decision to hunt lemurs were poverty, poor health, and child malnutrition. Knowledge of laws, level of education, involvement in ecotourism, traditional cultural values, taste preferences, opportunity, and human–wildlife conflict had no impact on lemur hunting. Our results suggest that the welfare of humans and lemurs are linked. The key to discouraging illegal hunting and improving the viability of Endangered lemur populations may be improving rural human health and welfare. Titre du périodique : Biological Conservation Volume : 197 : 124-130 En ligne : https://doi.org/10.1016/j.biocon.2016.02.012 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire