Fator de condição e aspectos reprodutivos de fêmeas de Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) no rio Amambai, de Mato Grosso do Sul - DOI: 10.4025/actascibiolsci.v28i2.1030

Silvana Lima dos Santos; Lucilene Finoto Viana; Sidnei Eduardo Lima-Junior

doi:10.4025/actascibiolsci.v28i2.1030

**Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State** - DOI: 10.4025/actascibiolsci.v28i2.1030

Authors

Silvana Lima dos Santos UEMS Author
Lucilene Finoto Viana UEMS Author
Sidnei Eduardo Lima-Junior UEMS Author

DOI:

https://doi.org/10.4025/actascibiolsci.v28i2.1030

Keywords:

Pimelodella cf gracilis, época de desova, fator de condição, reprodução, rio Amambai

Abstract

The aim of this study is to describe the seasonal variations of condition factor and of the gonadal development cycle of Pimelodella cf. gracilis in Amambai River (MS, Brazil). The length and weight of 232 individuals were measured to calculate the Allometric Condition Factor. For the females (n=162), we also obtained the ovarian weight and the gonadal maturity stages in order to calculate the GSI and the relative frequency (%) of this stages at each season of the year. Results indicate that the highest GSI values were registered in spring and summer. Thus, we concluded that the spawning season of this species occurs between October and April. However, it was not possible to identify more precisely when this event occurs. The highest values of condition factor were observed in summer, as a probable consequence of the more intensive feeding activity that individuals demonstrate during the spring.

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Author Biography

Sidnei Eduardo Lima-Junior, UEMS

Bacharel, Mestre e Doutor em Ciências Biológicas pela Universidade Estadual Paulista (Unesp), Campus de Rio Claro. Atualmente é Professor Adjunto de Ensino Superior na Universidade Estadual de Mato Grosso do Sul (UEMS). Tem experiência nas áreas de Zoologia e Ecologia, com ênfase em Ictiologia - Biologia e Ecologia de peixes - e Monitoramento Ambiental. É Pró-Reitor de Pesquisa e Pós-Graduação da UEMS desde setembro de 2007 Currículo Lattes

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Published

2008-03-07

Issue

Vol. 28 No. 2 (2006)

Section

Ecology and Limnology

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How to Cite

Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030. (2008). Acta Scientiarum. Biological Sciences, 28(2), 129-134. https://doi.org/10.4025/actascibiolsci.v28i2.1030