Aiming to analyze the diversity of fish fauna on the beach of Jaguaribe, at Itamaracá island, four collections had been carried through April and November 2003, and March and August 2004, made with beach seine net. A total of 25 species and 24 genus were recorded comprised in seven orders and 15 families. The Perciformes order was most frequent representing 82.25% of the total of sampled fishes. It had predominance of representatives of the Sciaenidae (49.40%), and the species most abundant was Ophioscion punctatissimus Meek & Hildebrand, 1925 enclosing about 40.77% of the species total. For the analysis of diversity of Shannon, the month of November was what it got greater diversity (0.805) and equitability (0.843) and, the month of March, what it got the lesser diversity (0.562) and equitability (0.540). The density of fishes increases during dry periods suggesting that pluviometric variations could be structuring fish community at local scale.
Fish fauna; Diversity; Jaguaribe Beach; Northeastern Brazil
