Biological aspects of little tunny Euthynnus alletteratus from Spanish and Portuguese waters.
2018
Saber-Rodríguez, 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, D.
English. This study provides information on some biological aspects of Euthynnus alletteratus from thewestern 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 wascalculated with W equal to 0.01242 FL3.058. Histological analysis of the ovaries and the monthlyvariation of the gonadosomatic index for both sexes suggested that the spawning season forEuthynnus alletteratus in the western Mediterranean Sea takes place from June to August. Thelengths at first maturity (L50) were estimated to be 50.1 cm and 43.4 cm FL for female andmale, respectively. Age at first maturity (A50) was calculated.
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