Partição de recursos alimentares entre duas espécies de Bryconamericus Eingenmann, 1970 da bacia do rio Iguaçu, Brasil- DOI: 10.4025/actascibiolsci.v26i4.1534

Márcia Regina Russo; Norma Segatti Hahn; Carla Simone Pavanelli

doi:10.4025/actascibiolsci.v26i4.1534

Resource partitioning between two species of Bryconamericus Eigenmann, 1907 from the Iguaçu river basin, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1534

Márcia Regina Russo UEM
Norma Segatti Hahn UEM
Carla Simone Pavanelli UEM

DOI: https://doi.org/10.4025/actascibiolsci.v26i4.1534

Abstract

Diets of two species of Bryconamericus Eigenmann, 1907 called Bryconamericus sp. 1 and Bryconamericus sp. 2, were compared. Collections were made monthly, from March 1997 to February 1998, on the Iguaçu River, State of Paraná. Both species are insectivores, but Bryconamericus sp. 1 feed predominantly on larvae of aquatic insects and Bryconamericus sp. 2 feed on terrestrial insects. In Bryconamericus sp. 1, the mouth is sub-inferior with slightly thick upper lip, while in Bryconamericus sp. 2 the mouth is anterior with reduced lip; teeth are different in both species, confirming differences in feeding tactics. The length of the intestine is significantly longer in Bryconamericus sp. 1. This particularity and the low overlap values (< 0.60) suggest that interspecific differences in feeding habits play an important role, allowing species coexistence

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Author Biography

Norma Segatti Hahn, UEM

Graduada em Ciências Biológicas pela Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP)(1978), mestrado (1983) e doutorado (1992) em Ciências Biológicas (Zoologia) pela Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP-Rio Claro). Atualmente é Prof. Associado nível C da Universidade Estadual de Maringá, atuando como docente e orientadora no curso de Graduação em Ciências Biológicas e no programa de Pós- graduação em Ecologia de Ambientes Aquáticos Continentais. Tem experiência na área de Ecologia, com ênfase em Ecologia de Ecossistemas, atuando principalmente nos seguintes temas: peixes, alimentação, reservatórios, planície de inundação Currículo Lattes

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Published

2008-03-31

How to Cite

Russo, M. R., Hahn, N. S., & Pavanelli, C. S. (2008). Resource partitioning between two species of Bryconamericus Eigenmann, 1907 from the Iguaçu river basin, Brazil - DOI: 10.4025/actascibiolsci.v26i4.1534. Acta Scientiarum. Biological Sciences, 26(4), 431-436. https://doi.org/10.4025/actascibiolsci.v26i4.1534

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Issue

Vol 26 No 4 (2004)

Section

Biology Sciences

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