Biological aspects of little tunny Euthynnus alletteratus from Spanish and Portuguese waters.

Authors: Saber, S. (Sámar); Ortiz-de-Urbina-Gutiérrez, J.M. (José María); Lino, P.G. (Pedro G.); Gómez-Vives, M.J. (María José); Coelho, R. (Rui); Muñoz-Lechuga, R. (Rubén); Macías-López, A.D. (Ángel David);

handle: 10261/326594 , 10508/14923

Biological aspects of little tunny Euthynnus alletteratus from Spanish and Portuguese waters.

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Abstract

This study provides information on some biological aspects of Euthynnus alletteratus from the western Mediterranean (Spanish coast) and in the Atlantic Ocean (south of Iberian Peninsula). A total of 1266 individuals were measured between 2003 and 2017. The L-W relationship was calculated with W equal to 0.01242 FL3.058 . Histological analysis of the ovaries and the monthly variation of the gonadosomatic index for both sexes suggested that the spawning season for Euthynnus alletteratus in the western Mediterranean Sea takes place from June to August. The lengths at first maturity (L50) were estimated to be 50.1 cm and 43.4 cm FL for female and male, respectively. Age at first maturity (A50) was calculated.

Country

Spain

Related Organizations

Spanish Institute of Oceanography
Spain

Keywords

Centro Oceanográfico de Málaga, Pesquerías

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