Dinâmica da reprodução e da nutrição de Salminus maxillosus Valenciennes, 1849 (Pisces, Characidae) do rio Mogi Guaçu, Estado de São Paulo, Brasil

Geraldo Barbieri; Fernando André Salles; Marcos Antonio Cestarolli

doi:10.4025/actascibiolsci.v23i0.2698

Reproductive and nutritional dynamics of Salminus maxillosus Valenciennes, 1849 (Pisces, Characidae) at Mogi Guaçu river, state of São Paulo, Brazil

Geraldo Barbieri Instituto de Pesca
Fernando André Salles Instituto de Pesca
Marcos Antonio Cestarolli Instituto de Pesca

DOI: https://doi.org/10.4025/actascibiolsci.v23i0.2698

Abstract

The reproductive and nutritional dynamics of Salminus maxillosus Val. were studied in 327 specimens (195 females and 132 males) collected in the Mogi Guaçu river, São Paulo, Brazil from August, 1996 to July, 1997. Reproductive dynamics were assessed through analysis of monthly variation in gonadosomatic index, hepatosomatic index, relative frequencies of gonadal maturity stages and first sexual maturation size. Reproduction occurred from November to January (the highest values recorded in December),when the highest water temperatures and pluviometric index were observed. The size of S. maxillosus at first sexual maturation (Lpm) was calculated to be 346.7 mm (males) and 447.4 mm (females), the age being two years for both males and females. The L₁₀₀ values calculated were 525.0 mm for males and 625.0 mm for females, respectively. The nutritional dynamics were estimated through analysis of the monthly variation and the relative frequency of the repletion stages. S. maxillosus from Mogi Guaçu River is in its optimum feeding condition before and during the reproductive season

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Author Biography

Geraldo Barbieri, Instituto de Pesca

Possui graduação em História Natural pela Universidade Estadual Paulista Júlio de Mesquita Filho (1966) , mestrado em Ciências Biológicas (Zoologia) pela Universidade de São Paulo (1974) e doutorado em Ciências Biológicas (Zoologia) pela Universidade de São Paulo (1976) . Tem experiência na área de Recursos Pesqueiros e Engenharia de Pesca , com ênfase em Recursos Pesqueiros de Águas Interiores. Atuando principalmente nos seguintes temas: Crescimento, Crescimento Relativo, Geophagus Brasiliensis, Pisces, População Peixe e Represa. Currículo Lattes

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Published

2008-05-09

How to Cite

Barbieri, G., Salles, F. A., & Cestarolli, M. A. (2008). Reproductive and nutritional dynamics of Salminus maxillosus Valenciennes, 1849 (Pisces, Characidae) at Mogi Guaçu river, state of São Paulo, Brazil. Acta Scientiarum. Biological Sciences, 23, 441-444. https://doi.org/10.4025/actascibiolsci.v23i0.2698

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Issue

Vol 23 (2001)

Section

Biology Sciences

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