Biologia alimentar e reprodutiva do peixe-cachorro (Oligosarcus Jenynsii Günther, 1864) na região do alto rio Uruguai - Brasil - DOI: 10.4025/actascibiolsci.v26i2.1632

Samara Hermes Silva; Samira Meurer; Evoy Zaniboni Filho

doi:10.4025/actascibiolsci.v26i2.1632

Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632

Samara Hermes Silva UFSC
Samira Meurer UFSC
Evoy Zaniboni Filho UFSC

DOI: https://doi.org/10.4025/actascibiolsci.v26i2.1632

Abstract

The aim of this study was to analyze feeding habit and reproductive aspects of Oligosarcus jenynsii of the upper Uruguay river. A total of 246 specimens of O. jenynsii were captured: 127 were females, 78 were males and the sex of 41 specimens could not be identified. Total length and weight ranged from 35 to 310mm and 0.3 to 330g, respectively. Highest average replection index values were observed during autumn (1.9% ± 1.4). The species was carnivorous with a tendency to piscivory. The sex ratio was 1.6 female: 1 male. According to variations of average gonadosomatic index, the frequency distribution of maturity stages, and the relative distribution of oocyte diameter, O. jenynsii presents a multiple spawning, breeding from winter to spring. Size at maturity was estimated as 164mm for both males and females. The absolute fecundity average was 20,727

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Author Biography

Samara Hermes Silva, UFSC

possui graduação em Ciências Biológicas pela Universidade Federal de Santa Catarina (2000) e mestrado em Aquicultura pela Universidade Federal de Santa Catarina (2003) . Atualmente é Bolsista do Fundação de Amparo a Pesquisa e Extensão Universitária. Tem experiência na área de Recursos Pesqueiros e Engenharia de Pesca , com ênfase em Recursos Pesqueiros de Águas Interiores. Atuando principalmente nos seguintes temas: Ictioplâncton, ovos e larvas de peixe, rio Uruguai, distribuição espacial, ciclo nictemeral Currículo Lattes

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Published

2008-04-01

How to Cite

Silva, S. H., Meurer, S., & Zaniboni Filho, E. (2008). Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632. Acta Scientiarum. Biological Sciences, 26(2), 175-179. https://doi.org/10.4025/actascibiolsci.v26i2.1632

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Issue

Vol 26 No 2 (2004)

Section

Biology Sciences

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