Factors influencing spatial distribution of fish communities on a fringing reef at Mauritius, S.W. Indian Ocean

This paper analyses the spatial patterns of fish communities on a narrow fringing reef of Mauritius and identifies some controlling factors. Canonical Correspondence Analysis revealed that the location in the reef ecosystem, the living coral coverage, and the proximity to a dredged area were the major factors controlling the distribution and abundance of fish species. Two distinct communities were observed across the fringing reef, representing a land-ocean gradient. The low diversity of fish species, and also of invertebrates such as corals, molluscs, and echinoderms is probably a consequence of the narrowness of the fringing reef and of anthropogenic impacts, notably the high pollution by nutrients.