| Titre : |
Reef fishes of northeast Madagascar |
| Type de document : |
texte imprimé |
| Auteurs : |
Melita Samoilys, Auteur ; Bemahafaly Randriamanantsoa, Auteur |
| Editeur : |
Conservation International |
| Année de publication : |
2011 |
| Importance : |
p 29-39 |
| Langues : |
Anglais (eng) |
| Catégories : |
SCIENCES DE LA MER
|
| Mots-clés : |
POISSONS DES CORAUX NORD OUEST DE MADAGASCAR TAXONOMIE |
| Résumé : |
Comprehensive surveys and analyses of coral reef fish diversity are few in the Western Iindian Oocean (WIO), thus our understanding of patterns in reef fish diversity and species tichness across the WIO region is still poor.
A region centred around southern Tanzania/northern Mozambique and Northern Madagascar has beeb proposed as a centre of coral diversity in the WIO, driven by the Indian Ocean current patterns (Obura 2008). It is likely that coral reef fishes follow similar gradient patterns and this hypothesis is currently under investigation by CORDIO EastAfrica’s Core region project : is there a WIO coral triangle ? funded by the Western Indian Ocean Marine Science Association. The northern tip of Madagascar represents a key location in this proposed centre of coral reef diversity with the first CI marine RAP in 2002 establishing the northwest tip of Madagascar as having the highest diversity of hard corals of any site in the Indian Ocean and over 750 reef-associated fish species . To date, only the northwestern side of Madagascar has been surveyed, therefore the current RAP set out to record species diversity in reef fishes on the far northeastern coastline of Madagascar.
In contrast to fish diversity studies, many surveys and analyses of patterns in the population abundance of coral reef fishes across the WIO have been done, with a growing literature on the effects of fishing , the impacts of marine parks and reserves , and the effects of coral reef bleaching on reef fish communities and abundance. Certain trophic groups of reef fish , particularly the herbivores, have been shown to play critical role in coral reef resilience by controlling macro-algal communities and preventing coral-algal phase shifts. The IUCN Climate Change and Coral reefs working group has outlined protocols to quantify resistance and resilience indicators for coral reefs, including reef fishes which serve as useful indicators of reef health status and vulnerability. These attributes provided a second and separate focus of the RAP3 fish surveys : to collect data on the population abundance of selected reef fish taxa to compliment the coral and benthic reef resilience surveys, in order to assess the health of the coral reefs on this previously un-surveyed cost of northeastern Madagascar. |
| Numéro du document : |
A 10359/MAR 22 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
GESTION DE L'ENVIRONNEMENT MARIN |
| Bull2 (Theme secondaire) : |
GESTION DES RESSOURCES MARINES |
Reef fishes of northeast Madagascar [texte imprimé] / Melita Samoilys, Auteur ; Bemahafaly Randriamanantsoa, Auteur . - Conservation International, 2011 . - p 29-39. Langues : Anglais ( eng)
| Catégories : |
SCIENCES DE LA MER
|
| Mots-clés : |
POISSONS DES CORAUX NORD OUEST DE MADAGASCAR TAXONOMIE |
| Résumé : |
Comprehensive surveys and analyses of coral reef fish diversity are few in the Western Iindian Oocean (WIO), thus our understanding of patterns in reef fish diversity and species tichness across the WIO region is still poor.
A region centred around southern Tanzania/northern Mozambique and Northern Madagascar has beeb proposed as a centre of coral diversity in the WIO, driven by the Indian Ocean current patterns (Obura 2008). It is likely that coral reef fishes follow similar gradient patterns and this hypothesis is currently under investigation by CORDIO EastAfrica’s Core region project : is there a WIO coral triangle ? funded by the Western Indian Ocean Marine Science Association. The northern tip of Madagascar represents a key location in this proposed centre of coral reef diversity with the first CI marine RAP in 2002 establishing the northwest tip of Madagascar as having the highest diversity of hard corals of any site in the Indian Ocean and over 750 reef-associated fish species . To date, only the northwestern side of Madagascar has been surveyed, therefore the current RAP set out to record species diversity in reef fishes on the far northeastern coastline of Madagascar.
In contrast to fish diversity studies, many surveys and analyses of patterns in the population abundance of coral reef fishes across the WIO have been done, with a growing literature on the effects of fishing , the impacts of marine parks and reserves , and the effects of coral reef bleaching on reef fish communities and abundance. Certain trophic groups of reef fish , particularly the herbivores, have been shown to play critical role in coral reef resilience by controlling macro-algal communities and preventing coral-algal phase shifts. The IUCN Climate Change and Coral reefs working group has outlined protocols to quantify resistance and resilience indicators for coral reefs, including reef fishes which serve as useful indicators of reef health status and vulnerability. These attributes provided a second and separate focus of the RAP3 fish surveys : to collect data on the population abundance of selected reef fish taxa to compliment the coral and benthic reef resilience surveys, in order to assess the health of the coral reefs on this previously un-surveyed cost of northeastern Madagascar. |
| Numéro du document : |
A 10359/MAR 22 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
GESTION DE L'ENVIRONNEMENT MARIN |
| Bull2 (Theme secondaire) : |
GESTION DES RESSOURCES MARINES |
|
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