Estrutura populacional de Poecilia vivípara Bloch & Schneider, 1801 (Atheriniformes, Poeciliidae) do rio Ceará-Mirim - Rio Grande do Norte

Renata Swany Soares Nascimento; Helio de Castro Bezerra Gurgel

doi:10.4025/actascibiolsci.v22i0.2923

Populational structure of Poecilia vivipara Block & Schneider, 1801 (Atheriniformes, Poeciliidae) of Ceará-Mirim river, State of Rio Grande do Norte

Authors

Renata Swany Soares Nascimento UFRN Author
Helio de Castro Bezerra Gurgel UFRN Author

DOI:

https://doi.org/10.4025/actascibiolsci.v22i0.2923

Keywords:

Poecilia vivípara, estrutura populacional, sazonalidade, peixes

Abstract

With the aim of clarifying aspects of the populational structure of Poecilia vivipara in the Ceará-Mirim river, State of Rio Grande do Norte, a total of 3,390 specimens were captured in monthly collections June 1995 trough May 1997, using nets and sieves. Results showed that females, prevailed in the proportion of 8:1, in the whole period as well as seasonaly. The total length classes distribution for separate sexes indicated that females reaches greatest lengths than males with no difference between dry and rainy seasons. The species growth is of the alometric positive type as suggested by the &Teta; value (3,86). No correlation between abiotic factors (photoperiod duration, rainfall, temperature and river water level) and the population structure was found

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Author Biography

Helio de Castro Bezerra Gurgel, UFRN

possui graduação em Ciências Biológicas pela Universidade Federal do Rio Grande do Norte (1975), mestrado em Zoologia pela Universidade Federal do Paraná (1979) e doutorado em Ecologia e Recursos Naturais pela Universidade Federal de São Carlos (1992). Atualmente é professor adjunto iv da Universidade Federal do Rio Grande do Norte. Tem experiência na área de Zoologia, com ênfase em Ictiologia, atuando principalmente nos seguintes temas: peixe, rio ceara-mirim, estrutura populacional, reprodução e alimentação Currículo Lattes

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Published

2008-05-09

Issue

Vol. 22 (2000)

Section

Biology Sciences

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How to Cite

Populational structure of Poecilia vivipara Block & Schneider, 1801 (Atheriniformes, Poeciliidae) of Ceará-Mirim river, State of Rio Grande do Norte. (2008). Acta Scientiarum. Biological Sciences, 22, 415-422. https://doi.org/10.4025/actascibiolsci.v22i0.2923