Trophic relationships among fish assemblages in a mudflat within Brazilian marine protected area
| Autor: | Dafne Marcelle de Almeida Ramos Campos, Adna Ferreira da Silva, Natalice dos Santos Sales, Ronnie Enderson Mariano Carvalho Cunha Oliveira, Andre Luiz Machado Pessanha |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Brazilian Journal of Oceanography, Vol 63, Iss 2, Pp 135-146 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1982-436X 1679-8759 |
| DOI: | 10.1590/S1679-87592015091306302 |
| Popis: | Abstract 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. |
| Databáze: | Directory of Open Access Journals |
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