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Shallow reef fish communities of South Bahia coast, Brazil

Abstracts

This study aims to describe for the first time the fish community structure of five shallow reefs located off the cities of Santa Cruz de Cabrália and Porto Seguro (Araripe-AR, Itacipanema-IT, Alagados-AL, Naufrágio-NA and Recife de Fora Marine Park-RF Reefs), South Bahia, Northeastern Brazil. Fish density and richness were assessed through stationary point counts of 2 m radius for small cryptic species and 3 m for more conspicuous species. A total of 1 802 fishes belonging to 23 families and 54 species were observed. The most abundant species were the pomacentrids Stegastes fuscus and Abudefduf saxatilis. No significant differences were found for species richness or density of conspicuous species, but density of small cryptic species was low on reefs with high bottom rugosity, where there were more holes and crevices available. Herbivores were dominant on AR, AL and RF, invertivores on AL and both groups were dominant on IT. Some habitat variables such as rugosity and benthic cover were strongly correlated to species and sites. High bottom heterogeneity was found among reefs but they still presented similar species composition, richness and density. Within small-scale studies, such similarities in composition and richness are to be expected for reef fish communities, as most of the species concerned have a wide distribution range.

Fish Community; Reef Ecology; Bahia Reefs


Este trabalho descreve pela primeira vez as comunidades de peixes em cinco recifes rasos de Santa Cruz de Cabrália e Porto Seguro (Araripe-AR, Itacipanema-IT, Alagados-AL, Naufrágio-NA e Recife de Fora Marine Park-RF), sul da Bahia, nordeste do Brasil. A densidade e riqueza foram obtidas utilizando censos estacionários de 2 m de raio para espécies pequenas e criptobênticas e 3 m de raio para espécies conspícuas. Um total de 1802 peixes pertencentes a 23 famílias e 54 espécies foram registrados, sendo as espécies mais abundantes dos pomacentrídeos Stegastes fuscus e Abudefduf saxatilis. Nenhuma diferença significativa foi encontrada para a riqueza entre os recifes e também para a densidade de espécies vágeis. Entretanto, a densidade de espécies criptobênticas foi mais alta em lugares com maior rugosidade. Herbívoros foram dominantes nos recifes AR, AL e RF, invertívoros em AL e a dominância dos dois grupos ocorreram em IT. Algumas variáveis ambientais como rugosidade e cobertura bentônica estão fortemente relacionadas às espécies e diferentes recifes. Estes são fisicamente heterogêneos, mas a composição e riqueza de espécies similares, o que seria esperado em comunidades recifais abrangendo estudos em pequena-escala, pois peixes recifais estão amplamente distribuídos.

Comunidade de peixes; Ecologia de recifes; Recifes da Bahia


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Publication Dates

  • Publication in this collection
    14 Feb 2011
  • Date of issue
    2010

History

  • Accepted
    06 Aug 2010
  • Reviewed
    14 July 2010
  • Received
    04 June 2009
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