Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil

Authors

  • Rodrigo Silvestre Martins Universidade de São Paulo
  • Paulo Ricardo Schwingel Universidade do Vale do Itajaí

DOI:

https://doi.org/10.1590/S1679-87592012000200007

Keywords:

Zeidae, size structure, sex ratio, maturity, bathymetry, southern Brazil

Abstract

Biological aspects of sailfin dory, Zenopsis conchifer, were studied from 839 individuals obtained from deep-sea commercial bottom trawling off southern Brazil at depths up to 526 m in 2002 and 2003. Samples included fish from 101 mm Lt and 15 g up to 640 mm Lt and 2,9 g. The sex-ratio was 50% at 150 mm Lt and between 300-350 mm Lt, with females outnumbering males in the remaining size classes. Reproductive activity seems to peak between July and August (austral winter). Size at attainment of 50% maturity (Lt50) was 311 mm Lt in females. The mean length and maturity of the specimens increased with depth, suggesting that larger fish concentrate in deeper waters.

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Published

2012-06-01

Issue

Section

naodefinida

How to Cite

Biological aspects of the Sailfin dory Zenopsis conchifer (Lowe, 1852) caught by deep-sea trawling fishery off southern Brazil. (2012). Brazilian Journal of Oceanography, 60(2), 171-179. https://doi.org/10.1590/S1679-87592012000200007