Sobreposição alimentar e partição de recursos alimentares entre espécies de peixes de um estuário tropical no Nordeste do Brasil

Autores

  • Adna Ferreira Silva Garcia Universidade do Rio Grande Av. Itália, Km 8, Carreiros. 96201-900 - Rio Grande, RS - Brasil Telefone: (53) 3233-6539
  • Ana Lúcia Vendel Universidade Estadual da Paraíba

Resumo

Foram estudadas a sobreposição alimentar e a partilha de recursos entre nove espécies de peixes carnívoros capturados em águas rasas do estuário do rio Paraíba do Norte, Paraíba, Brasil. Os peixes foram amostrados com rede de arrasto de praia, entre janeiro e dezembro de 2008. Ao todo, foram analisados 958 estômagos. Crustacea foi o recurso alimentar dominante para Lutjanus alexandrei, L. jocu e Bathygobius soporator, enquanto Telostei foram consumidos principalmente por Centropomus undecimalis e C. parallelus. Em contraste, Polychaeta foram predados principalmente por Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergii e S. parkeri. Embora a maioria das espécies faça uso de itens alimentares semelhantes, elas o fazem em diferentes proporções e quantidades. No geral, a sobreposição de nicho entre as espécies foi baixa (< 0,60), mas houve casos em que duas espécies tiveram nicho alimentar altamente sobreposto (entre 0,72 e 0,97). Estes resultados corroboram a hipótese de que a partilha de recursos alimentares determina a coexistência de espécies em ambientes tropicais estuarinos.

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Biografia do Autor

Adna Ferreira Silva Garcia, Universidade do Rio Grande Av. Itália, Km 8, Carreiros. 96201-900 - Rio Grande, RS - Brasil Telefone: (53) 3233-6539

Doutoranda em Biologia de Ambientes Aquáticos Continentais Programa de Pós-graduação em Biologia de Ambientes Aquáticos Continentais (FURG)

Ana Lúcia Vendel, Universidade Estadual da Paraíba

Curso de Ciências Biológicas Departamento de Biologia Áreas: Ictiologia e Ecologia de Estuários

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Publicado

2016-09-30

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GARCIA, A. F. S.; VENDEL, A. L. Sobreposição alimentar e partição de recursos alimentares entre espécies de peixes de um estuário tropical no Nordeste do Brasil. Gaia Scientia, [S. l.], v. 10, n. 4, 2016. Disponível em: https://periodicos.ufpb.br/ojs2/index.php/gaia/article/view/24892. Acesso em: 26 set. 2022.

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