Reproduction of Scomberomorus sierra (Percoidei: Scombridae) in the Central Mexican Pacific coast

Elaine  Espino-Barr; Manuel  Gallardo-Cabello; Rubí Anadely  Nava-Ortega; Marcos  Puente-Gómez; Arturo  Garcia-Boa

Reproduction of Scomberomorus sierra (Percoidei: Scombridae) in the Central Mexican Pacific coast

Autores

Elaine Espino-Barr

Manuel Gallardo-Cabello

Rubí Anadely Nava-Ortega

Marcos Puente-Gómez

Arturo Garcia-Boa

Editor

Universidad de Colima

Descripción

To know the reproductive cycle of Scomberomorus sierra, from January 2003 to March 2004, individuals were monthly obtained in the coast of Colima, Mexico. Individuals were obtained with hand lines, troll and gillnet, which helped obtain different lengths and age groups. Sex ratio was 1:1.03 female: males. Average length of sexual maturity L50 = 54.3 cm of total length (TL, cm) in both males and females with 3.79 years of age, length of first maturity (L25) for both was 47.3 cm corresponding to 3.08 years of age. The gonadosomatic index was at its maximum values in March and August. The allometric relationship between the liver weight and the fish weight is isometric (b = 1.004). Monthly values of the hepatosomatic index are higher in March, May, and November - December. The condition factors show two main seasons of wellness. Total fecundity was 416,483 to 4’354,860 oocytes for females of 4 to 15 years old. Relative fecundity was average: 703.7 oocytes·g-1 (312.6 - 1,438.4 oocytes·g-1 in females from 4 to 15 years old). Average oocytes diameter was 0.44 mm (0.34 - 0.59 mm). The species should be protected from fishing from February to May and August to October, and under 50 cm TL.