Avaliação da dieta de Astyanax altiparanae Garutti & Britski, 2000 (Osteichthyes, Tetragonopterinae) antes e após a formação do reservatório de Salto Caxias, Estado do Paraná, Brasil

Fernanda Aparecida da Silva Cassemiro; Norma Segatti Hahn; Rosemara Fugi

doi:10.4025/actascibiolsci.v24i0.2314

Astyanax altiparanae Garutti & Britski, 2000 (Osteichthyes, Tetragonopterinae) diet before and after the formation of Salto Caxias Reservoir, state of Paraná, Brazil

Authors

Fernanda Aparecida da Silva Cassemiro UEM Author
Norma Segatti Hahn UEM Author
Rosemara Fugi UEM Author

DOI:

https://doi.org/10.4025/actascibiolsci.v24i0.2314

Keywords:

dieta, Astyanax altiparanae, variações temporais, reservatório

Abstract

Astyanax altiparanae (Osteichthyes, Tetragonopterinae) diet was evaluated before and after the Salto Caxias (Iguaçu river) dam closure, in order to investigate this species trophic adaptability. Samples were taken from March 1997 to February 2000, and the contents of 583 stomachs were analyzed, separated and volumetrically quantified. During the river phase, the species showed a tendency to herbivory and, during the reservoir phase, to omnivory. Group analysis (DCA) showed two distinct temporal groups: specimens with more specialized diet, collected in phase river, and specimens collected after dam closure, with mixed diet. The results suggest that A. altiparanae has high trophic adaptability and may succeed in the new environment.

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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

2008-05-13

Issue

Vol. 24 (2002)

Section

Biology Sciences

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How to Cite

Astyanax altiparanae Garutti & Britski, 2000 (Osteichthyes, Tetragonopterinae) diet before and after the formation of Salto Caxias Reservoir, state of Paraná, Brazil. (2008). Acta Scientiarum. Biological Sciences, 24, 419-425. https://doi.org/10.4025/actascibiolsci.v24i0.2314