<b>Seasonal and ontogenetic diet patterns of the freshwater pufferfish <i>Colomesus asellus</i> (Müller & Troschel, 1849) in the upper-middle Tocantins River

  • Renata Bartolette Universidade Federal de Sergipe
  • Daniela Cristina Oliveira Rosa Universidade Federal do Rio de Janeiro
  • Bruno Eleres Soares Universidade Federal do Rio de Janeiro
  • Danielle Antunes Beserra Universidade Federal do Rio de Janeiro
  • Miriam Pilz Albrecht Universidade Federal do Rio de Janeiro
  • Marcelo Fulgêncio Guedes Brito Universidade Federal de Sergipe

Resumo

 

We described the feeding habits of Colomesus asellus from riverbanks of the upper-middle Tocantins River, Central Brazil. Two sampling expeditions were carried out in August (dry season) and in October (rainy season) of 2013, downstream from the Lajeado Hydroelectric Power Plant, Tocantins state. The diet of C. asellus was characterized and compared between juveniles and adults and between individuals captured in the dry season and in the rainy season. Individuals exhibited marked temporal segregation, with a predominance of adults on the riverbanks during the dry season and the predominance of juveniles in the rainy season. The diet of this species was based on diverse benthic prey, mostly Ephemeroptera nymphs (Insecta). Contrary to our expectations, the diet composition of C. asellus was not influenced by seasonal changes or ontogenetic factors, but the size of individuals determined the number of prey consumed. Thus, C. asellus can be classified in its trophic ecology as an insectivore without relation with fish size and seasonality.

 

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Publicado
2018-03-28
Como Citar
Bartolette, R., Rosa, D. C. O., Soares, B. E., Beserra, D. A., Albrecht, M. P., & Brito, M. F. G. (2018). <b>Seasonal and ontogenetic diet patterns of the freshwater pufferfish <i>Colomesus asellus</i&gt; (Müller & Troschel, 1849) in the upper-middle Tocantins River. Acta Scientiarum. Biological Sciences, 40(1), e35282. https://doi.org/10.4025/actascibiolsci.v40i1.35282
Seção
Zoologia

 

0.6
2019CiteScore
 
 
31st percentile
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0.6
2019CiteScore
 
 
31st percentile
Powered by  Scopus