Morphometrics and length structure of Micropogonias furnieri (Desmarest, 1823) (Perciformes, Sciaenidae) in Guanabara bay, State of Rio de Janeiro, Brazil

Authors

  • Magda Fernandes de ANDRADE-TUBINO Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade Federal do Rio de Janeiro (UFRJ / Programa de Pós-Graduação em Ecologia (PPGE), Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ)
  • Luiza Balster FIORE-CORREIA Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade Federal do Rio de Janeiro (UFRJ)
  • Marcelo VIANNA Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade Federal do Rio de Janeiro (UFRJ) / Programa de Pós-Graduação em Ecologia (PPGE), Departamento de Ecologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ)

Keywords:

demersal fish, bottom trawl, bycatch, Micropogonias furnieri, length-weight relationship, morphometrics

Abstract

The white mouth croaker Micropogonias furnieri is the most common species of Sciaenidae in Guanabara Bay, southeastern coast of Brazil. Data from monthly trawls taken from a shrimp boat between May 2003 and June 2005 showed that white mouth croakers are regularly present year round; the catch was entirely composed of juveniles. The length-weight relationship for pooled sexes was represented by the equation Wt = 0.0053*Lt 3.183. Significant seasonal differences in the condition factor were not observed (p>0.05). Regarding the morphometric characterization of this population stratum, most of the characters examined showed isometric growth, except for Pre-anal Distance, which showed positive allometry, and Eye Diameter, which showed negative allometry. Morphometric aspects of the population in Guanabara Bay seem to be similar to those from coastal populations of southeastern Brazil (population I), which differ from populations on the southern coast.

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Published

2018-11-05

Issue

Vol. 35 No. 2 (2009): BOLETIM DO INSTITUTO DE PESCA

Section

Scientific Article

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