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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Fish feeding interactions in a subtropical coastal system in the southwestern Atlantic

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Autor(es):
Soares, L. S. H. [1] ; Arantes, L. P. L. [1] ; Lamas, R. A. [1] ; Lima, F. A. [1] ; Pucci, M. C. J. [1] ; Rossi-Wongtschowski, C. L. D. B. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, Praca Oceanog 191, BR-05508120 Sao Paulo, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: OCEAN & COASTAL MANAGEMENT; v. 164, n. SI, p. 115-127, OCT 1 2018.
Citações Web of Science: 1
Resumo

Feeding interactions, which determine the dynamics, productivity and stability of an ecosystem to a large extent, constitute fundamental knowledge for understanding the functionality of an ecosystem. Within an integrated working context, this study aimed to identify the major prey for the fish species of Araca Bay through an analysis of stomach contents. Araca Bay is a sheltered, low tide terrace that presents seasonal hydrodynamics, primary productivity and organism communities. A total of 1253 stomachs from 28 fish species were sampled in March 2013 and January 2014 (austral summer) and in June 2013 (austral winter). A hierarchical cluster analysis (Bray-Curtis similarity index) was performed on the matrix of the index of relative importance (IRI%) of the food items of 15 species collected in both seasons. Five and four major trophic groups were recorded for the summer and winter, respectively (SIMPROF). A two-way PERMANOVA test showed significant differences in the prey compositions among the trophic groups but not the seasons. The annual dendrogram showed four trophic groups: shrimp feeders (8 species), teleostean fish feeders (2 species), copepod feeders (2 species), and benthic invertebrate feeders (3 species). Seasonal species shifts among the trophic groups related to the seasonal recruitment of relatively abundant fish species during the summer were recorded mainly between the teleostean fish feeder and shrimp feeder groups. Overall, the seasonal dynamics of the waters and the consequent prey abundance influenced the resource availability. Resource partitioning and feeding plasticity allowed the species to optimize the use of available prey in the bay. These results represent a contribution toward understanding the local food web, to construct a trophic model, and to contribute to its sustainable integrated management. (AU)

Processo FAPESP: 11/50317-5 - Biodiversidade e funcionamento de um ecossistema costeiro subtropical: subsídios para gestão integrada
Beneficiário:Antonia Cecília Zacagnini Amaral
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático