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Resumen del producto
Valdez Zenil, J., R., Rodiles Hernández, A.F., González Acosta, M., Mendoza Carranza & E., Barba Macías
(2014).
Length–weight and length–length relationships, gonadosomatic indices and size at first maturity of Eugerres mexicanus (Steindachner, 1863) (Percoidei: Gerreidae) from the Usumacinta River, Mexico.
Journal of Applied Ichthyology.
30(1): 218-220.
DOI: 10.1111/jai.12267.
Length–weight and length–length relationships, gonadosomatic indices and size at first maturity of Eugerres mexicanus (Steindachner, 1863) (Percoidei: Gerreidae) from the Usumacinta River, Mexico
José Valdez Zenil, Rocío Rodiles Hernández, Adrián Felipe González Acosta, Manuel Mendoza Carranza y Everardo Barba Macías
This study examines the length-weight (L-W) and length-length (L-L) relationships, gonadosomatic indices, and size at sexual maturity for individuals of the endemic Mexican mojarra, Eugerres mexicanus (Steindachner, 1863) from the Usumacinta River Basin, Tabasco, Mexico. From April 2008 to January 2010, 360 specimens were examined, including 151 (41.9%) male, 179 (49.7%) female and 30 unsexed(8.3%) individuals. Overall female:male ratio was 1.2 : 1. Gonadosomatic index (GSI) values indicate increased reproductive activity during February, with significant differences between males (GSI = 2.07) and females (GSI = 5.48). Themean size at first maturity (L50) was 17.3 cm TL for males and 20.5 cm TL for females.
Palabras clave: peces; índice gonadosomático; Gerreidae; Eugerres mexicanus; Crecimiento; Madurez sexual
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