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Abstract
BackgroundA rapid marine fish biodiversity assessment and subsequent surveys were conducted at D’Arros Island and St. Joseph Atoll, Amirantes, Republic of Seychelles.ResultsDive surveys recorded the first national occurrence of 16 reef associated fish species. Ten species had regionally cosmopolitan distributions in the West Indian Ocean and their occurrence in Seychelles was expected and confirmed. The occurrence of an additional six species represented range extensions of between approximately 2000 and 4300 km further than previously reported.ConclusionsThe results of this assessment suggest that the current ichthyofaunal diversity of the Amirantes Island group in the Republic of Seychelles may be underestimated and future surveys are likely to reveal the presence of additional species.
Highlights
A rapid marine fish biodiversity assessment and subsequent surveys were conducted at D’Arros Island and St
New marine fish records from Seychelles after Smith and Smith (1969) comprehensive account were last reported by Randall and van Egmond (1994), who recorded 108 new species nationally
At least 35 of these species were found within the Amirantes Island group, highlighting the potentially rich fish diversity associated with the area (Randall and van Egmond 1994)
Summary
A rapid marine fish biodiversity assessment and subsequent surveys were conducted at D’Arros Island and St. There are two primary island regions in Seychelles, the Inner Islands (45 primarily granitic islands in the north including the main Island Mahé) and the Outer Islands which include the Amirantes Island Group. The latter group is comprised of 11 low lying sand cays with a total land area of 11.5 km (Stoddart 1984). D’Arros Island and St. Joseph Atoll make up 3.03 km of low lying land which encompass a variety of marine habitats; including a deep channel separating the islands, platform reefs, an atoll with an extensive lagoon, mangroves and seagrass meadows (primarily Thalassodendron ciliatum) (Stoddart et al 1979; Stoddart 1984)
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