Spanish 
Chinese 
Russian 
German 
French 
Japanese 
Portuguese 
Hindi 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: eudriano@usp.br |
|
| 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.
