Abstract

The reproductive biology of Guabino in the Cordoba´s Caribbean sea, Colombia, was studied. Individuals collected between january and december/2005, with lengths ranging 20.0 - 38.1 (25.8 ± 4.1) cm of total length (TL) and 68.0 – 538.0 (169.7 ± 92.1) g of total weight were analized. The gonads were placed in Gilson solution, the Vazzoler scale was applicated and sexual proportion, maturity index, spawning season, the length at first maturity, ovocites’s diameter and fecundity were estimated. 80 females and 30 males were observed, with sexual proportion female: male of 2.7:1, different to expected. Spawning season of Guabino is extended from february to november, with reproductive peaks in march and august. The length at first maturity was estimated in 24.9, 28.7 and 25.9 cm TL for females, males and combined sexes, respectively. Ovocites’s diameter were 251?33 µ and fecundity was estimated in 157935 ± 96005 ovocites, with better equation F= 23601.90 WG 1.30, n = 46, r= 0.85

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