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Brazilian Journal of Oceanography

versão impressa ISSN 1679-8759versão On-line ISSN 1982-436X

Resumo

CAMPOS, Dafne Marcelle de Almeida Ramos et al. Trophic relationships among fish assemblages in a mudflat within Brazilian marine protected area. Braz. j. oceanogr. [online]. 2015, vol.63, n.2, pp.135-146. ISSN 1679-8759.  http://dx.doi.org/10.1590/S1679-87592015091306302.

The present study on the temporal variations in diet and the trophic guilds of dominant fish species in a tidal mudflat, during the dry and rainy seasons. We aimed at classifying the diet composition of 17 species in the Mamanguape river estuary, northeastern Brazil, identifying the dominant food components and evaluating the effects of seasonality on the guild organization. Diet varied little between species and seasons; during the rainy season, the diets seemed to be more heterogeneous. According to the importance of prey in the diets, 5 primary feeding guilds were identified: (1) Detritivore, (2) Zooplanktivore, (3) Zoobenthivore-epifaune, (4) Zoobenthivore-infaune, and (5) Piscivore. Most fishes fed on a diverse range of food items but relied heavily on the zooplankton preys. Several fish species showed a tendency for a specialised diet, with almost all species showing some degree of opportunistic feeding. A high degree of diet overlap was found among some species; however, the presence of exploitative competition could not be determined.

Palavras-chave : Diet; Feeding Ecology; Fish Community; Diet Overlap; Estuary.

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