Journal of Marine Biology & Oceanography ISSN: 2324-8661

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Research Article, J Mar Biol Oceanogr Vol: 1 Issue: 2

Sex Ratio and Length-Weight Relationship for Five Marine Fish Species from Brazil

M. R. Oliveira1, E. F. S. Costa2*, A. S. Araújo3, E. K. R. Pessoa1, M. M. Carvalho4, L. F. M. Cavalcante4 and S. Chellappa4
1Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
2Universidade de São Paulo, Laboratório de Ecologia Reprodutiva e do Recrutamento de Organismos Marinhos, Praça do Oceanográfico, 191, São Paulo, SP, Brazil
3Universidade Federal do Amapá, Campus Universitário Marco Zero do Equador, Macapá, AP, Brasil
4Departamento de Oceanografia e Limnologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
Corresponding author : E. F. S. Costa
Universidade de São Paulo, Laboratório de Ecologia Reprodutiva e do Recrutamento de Organismos Marinhos, Praça do Oceanográfico, 191, São Paulo, SP, Brazil
Tel: +55 11 3091-6577; Fax: +55 11 3091-6607
E-mail: [email protected]
Received: November 12, 2012 Accepted: December 11, 2012 Published: December 17, 2012
Citation: Oliveira MR, Costa EFS, Araújo AS, Pessoa EKR, Carvalho MM, et al. (2012) Sex Ratio and Length-Weight Relationship for Five Marine Fish Species from Brazil. J Mar Biol Oceanogr 1:2. doi:10.4172/2324-8661.1000103

Abstract

Sex Ratio and Length-Weight Relationship for Five Marine Fish Species from Brazil

This study estimated the sex ratio and length-weight relationships for five marine fish species, Mugil curema (Valenciennes, 1836), Chloroscombrus chrysurus (Linnaeus, 1766), Opisthonema oglinum (Lesueur, 1818), Hemiramphus brasiliensis (Linnaeus, 1758) and Lutjanus synagris, (Linnaeus, 1758) from the Brazilian coastal waters. Fish were collected on monthly basis by local fishermen using diversified fishing gears, such as, beach seine net, ballyhoo fishing net, gillnets and hand lines. The population of Mugil curema showed the expected ratio of 1:1. However, predominance of male C. chrysurus, O. oglinum and L. synagris, and females of H. brasiliensis were recorded. In general, the b exponent ranged from 2.6243 (C. chrysurus) to 3.3647 (L. synagris). The results indicated a negative allometric growth for the species O. oglinum and C. chrysurus, and an isometric growth for M. curema and H. brasiliensis. Moreover, an isometric and a positive allometric growth were recorded for females and males of L. synagris.

 

Keywords: Length-weight relationship; Sex ratio; Marine fish; Brazilian coastal waters

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