Estrutura populacional de Serrasalmus spilopleura Kner, 1860 (Pisces, Serrasalmidae) da lagoa de Extremoz, Estado do Rio Grande do Norte, Brasil

Ricardo de Meiroz Grilo Raposo; Helio de Castro Bezerra Gurgel

doi:10.4025/actascibiolsci.v23i0.2736

Population structure of Serrasalmus spilopleura Kner, 1860 (Pisces, Serrasalmidae) from the Extremoz Lake, state of Rio Grande do Norte, Brazil

Ricardo de Meiroz Grilo Raposo UFRN
Helio de Castro Bezerra Gurgel UNP

DOI: https://doi.org/10.4025/actascibiolsci.v23i0.2736

Abstract

Several aspects of the population structure of Serrasalmus spilopleura Kner, 1860, from the Extremoz Lake (5^o 42’76” S and 35^o 17’ 69” W), state of Rio Grande do Norte, are approached. From July 1998 to April 1999, 337 specimens were collected in each phase of the moon, with 5 gill-nets, knots spaces varying between 2,0 to 5,0 cm in four distinct points, with collection every five hours, timetable (17h00 - 22h00). The sexual proportion was 1:1, with a slight decrease of females during the winter; length classes during the entire period under analysis ranged between 6,0 and 17,0 cm, with a predominance of 9.0- 10,0 cm in all seasons; spring was the only exception since variation ranged between 11,0 and 12,0 cm. No significant relationship between total weight and total length for the sex groups was found. The value of θ = 3,2493 shows a positive allometric growth for the species

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Author Biography

Helio de Castro Bezerra Gurgel, UNP

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

How to Cite

Raposo, R. de M. G., & Gurgel, H. de C. B. (2008). Population structure of Serrasalmus spilopleura Kner, 1860 (Pisces, Serrasalmidae) from the Extremoz Lake, state of Rio Grande do Norte, Brazil. Acta Scientiarum. Biological Sciences, 23, 409-414. https://doi.org/10.4025/actascibiolsci.v23i0.2736

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Issue

Vol 23 (2001)

Section

Biology Sciences

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