Diet and Feeding Behaviour of the Black-and-White Ruffed Lemur (Varecia variegata variegata) in the Betampona Reserve, Eastern Madagascar / Adam Britt  

Public ISBD Titre : Diet and Feeding Behaviour of the Black-and-White Ruffed Lemur (Varecia variegata variegata) in the Betampona Reserve, Eastern Madagascar Type de document : texte imprimé Auteurs : Adam Britt, Auteur Année de publication : 2000 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS LEMURIENS:Biologie, Ecologie, Densité Mots-clés : FEEDING BEHAVIOUR  DIET  VARECIA  BLACK AND WHITE RUFFED LEMUR  FEEDING POSTURES  SUPPORT USE  VERTICAL SPACE Résumé : The feeding behaviour and diet of the black-and-white ruffed lemur (Varecia variegata variegata) was investigated in the Betampona Reserve, eastern Madagascar. The highly frugivorous diet of this subspecies was confirmed – feeding on fruits accounting for 92.0% of feeding records. Most feeding at Betampona was observed at 10–25 m above the forest floor amongst flexible, small (0.5–5.0 cm diameter) and oblique/horizontal (0–45°) supports. The Varecia spent on average 21.7% (± 1.5) of their daily activity budget feeding and employ a variety of postures that enable them to harvest fruits in the rain forest canopy. The suspensory postures were the most important in allowing Varecia to compete with other smaller-bodied frugivores. Titre du périodique : Folia Primatologica Volume : 71(3):133-141 En ligne : https://doi.org/10.1159/000021741 Diet and Feeding Behaviour of the Black-and-White Ruffed Lemur (Varecia variegata variegata) in the Betampona Reserve, Eastern Madagascar [texte imprimé] / Adam Britt, Auteur . - 2000. Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS LEMURIENS:Biologie, Ecologie, Densité Mots-clés : FEEDING BEHAVIOUR  DIET  VARECIA  BLACK AND WHITE RUFFED LEMUR  FEEDING POSTURES  SUPPORT USE  VERTICAL SPACE Résumé : The feeding behaviour and diet of the black-and-white ruffed lemur (Varecia variegata variegata) was investigated in the Betampona Reserve, eastern Madagascar. The highly frugivorous diet of this subspecies was confirmed – feeding on fruits accounting for 92.0% of feeding records. Most feeding at Betampona was observed at 10–25 m above the forest floor amongst flexible, small (0.5–5.0 cm diameter) and oblique/horizontal (0–45°) supports. The Varecia spent on average 21.7% (± 1.5) of their daily activity budget feeding and employ a variety of postures that enable them to harvest fruits in the rain forest canopy. The suspensory postures were the most important in allowing Varecia to compete with other smaller-bodied frugivores. Titre du périodique : Folia Primatologica Volume : 71(3):133-141 En ligne : https://doi.org/10.1159/000021741

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Population Density and Home Range Size of Indri indri in a Protected Low Altitude Rain Forest / Kellie D. G. Glessner

Public ISBD Titre : Population Density and Home Range Size of Indri indri in a Protected Low Altitude Rain Forest Type de document : texte imprimé Auteurs : Kellie D. G. Glessner, Auteur ; Adam Britt, Auteur Année de publication : 2005 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS LEMURIENS:Biologie, Ecologie, Densité Mots-clés : POPULATION DENSITY  HOME RANGE  INDRI INDRI  HABITAT DISTURBANCE  CONSERVATION Résumé : We report the results of a census of Indri indri conducted in Betampona Nature Reserve, a lowland rain forest in eastern Madagascar. In addition, we conducted a year-long study of the ranging behavior of 3 groups in the southwestern region of the reserve. We used 2 methods to calculate population density and home range size, and to provide minimum and maximum estimates. Population density of Indri indri ranged from 6.9–13.2 individuals/km2 in Betampona. Mean home range size is 27 ha. The values for population density and home range size are intermediate between values for Indri indri in selectively logged and undisturbed montane rain forest. Our results suggest a relationship between habitat disturbance, population density and home range size for the species. Recent increases in habitat disturbance appear to cause an increase in population density and a decrease in home range size. The results are consistent with ones for other folivorous primate populations. Further research on habitat requirements of Indri and availability in Betampona is necessary to investigate the possibility of translocating Indri from nearby forest fragments into Betampona. Titre du périodique : International Journal of Primatology Volume : 26(4): 855-872 Population Density and Home Range Size of Indri indri in a Protected Low Altitude Rain Forest [texte imprimé] / Kellie D. G. Glessner, Auteur ; Adam Britt, Auteur . - 2005. Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : LEMURIENS LEMURIENS:Biologie, Ecologie, Densité Mots-clés : POPULATION DENSITY  HOME RANGE  INDRI INDRI  HABITAT DISTURBANCE  CONSERVATION Résumé : We report the results of a census of Indri indri conducted in Betampona Nature Reserve, a lowland rain forest in eastern Madagascar. In addition, we conducted a year-long study of the ranging behavior of 3 groups in the southwestern region of the reserve. We used 2 methods to calculate population density and home range size, and to provide minimum and maximum estimates. Population density of Indri indri ranged from 6.9–13.2 individuals/km2 in Betampona. Mean home range size is 27 ha. The values for population density and home range size are intermediate between values for Indri indri in selectively logged and undisturbed montane rain forest. Our results suggest a relationship between habitat disturbance, population density and home range size for the species. Recent increases in habitat disturbance appear to cause an increase in population density and a decrease in home range size. The results are consistent with ones for other folivorous primate populations. Further research on habitat requirements of Indri and availability in Betampona is necessary to investigate the possibility of translocating Indri from nearby forest fragments into Betampona. Titre du périodique : International Journal of Primatology Volume : 26(4): 855-872

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