Temporal and spatial patterns on the settlement of reef fish larvae in a South Atlantic reef, Bahia, Brazil.

The larval settlement of reef fish - the moment in which the larvae establish on the reefs - is a critical phase and a determinant process in the structure of the adult assemblage. Artificial Reef Moorings (ARMs) were used to verify temporal and spatial variation on the settlement of competent fish larvae in the Itacolomis Reefs, located on the north portion of the Abrolhos Bank, Brazil. A total of 459 individuals settled on the ARMs, representing 8 families and 11 species. Cluster analysis showed spatial patterns, in relation to depth and protected versus non-protected area, and temporal patterns (season). The Carangidae was the most representative family, followed by Lutjanidae and Monacanthidae. The highest number of taxonomic groups was recorded during summer. Some groups, such as Pomacentridae (Abudefduf saxatilis), Labridae, Serranidae (Serranus sp. and Mycteroperca bonaci), Blenniidae and Chaenopsidae were registered only during summer. Non-protected areas had the highest richness and abundance, whereas protected areas were important for some species, registered exclusively there. The information presented here may support the development of detailed studies for the management and conservation of reef fish communities in this region.