WEIGHT X LENGTH RELATIONSHIP AND LENGTH CONVERSION OF YELLOWFIN TUNA, Thunnus albacares, FROM FISHERIES ASSOCIATED WITH AN OFFSHORE BUOY IN THE WESTERN EQUATORIAL ATLANTIC

Authors

  • Guelson Batista da Silva Universidade Federal Rural do Semi-Árido;
  • Antônio Adauto Fonteles-Filho

DOI:

https://doi.org/10.32360/acmar.v44i2.165

Keywords:

yellowfin tuna, Thunnus albacares, morphometry, fish aggregation device.

Abstract

This paper presents the estimate of the weight-length relationship for the Thunnus albacares fishery associated with an offshore buoy in the Equatorial Atlantic, as well as the length conversion to access the actual population structure that is being exploited. Data were obtained from May, 2010 to April, 2011 in the landings at the fishing pier of Areia Branca, Northeast Brazil, and on board during a research cruise in February, 2011. We sampled a total of 348 individuals of T. albacares but the estimates of the length conversion equation data were derived from 174 individuals and to the weight x length relationship data from 201 individuals. By linear regression analysis the following conversion formula of pectoral fin-fork length on fork length data was obtained: FL = 6.0522 + 1.2445 PFFL. The relationship between log-length and logweight data is represented by the regression ln DWT= -10.711+ 2.9347 ln FL, whose potential equation is WT = 0.0000223 x FL2.935.

Author Biographies

Guelson Batista da Silva, Universidade Federal Rural do Semi-Árido;

Professor, Departamento de Ciências Animais.

Antônio Adauto Fonteles-Filho

Professor Aposentado da Universidade Federal do Ceará, Instituto de Ciências do Mar.

Published

2011-09-01

Issue

Section

Artigos originais