Abstract

The Parassi mullet Mugil incilis (Hancock, 1830) is a commercially important fish in the insular and continental colom-bian Caribbean. 356 individuals were collected for this study and the length-weight relationship and condition factor were estimated through TW = aTLb and Cf = TW/TLb, respectively. The sizes ranged between 18.9 and 45.0 cm TL, the total weight between 62.0 and 718.0 g, the mean length in the catch was 29.2 cm TL, and was observed that 42.0% of females were caught below the length at first maturity estimated for the species. 219 females, 132 males and 5 undifferentiated were found, with sexual proportion female: male 1.7:1, differently than expected; and sexual dimorphism in size, reaching larger sizes females than males. The length–weight relationship for both sexes was TW = 0.018 (± 0.09) TL 2.78 (± 0.06), n = 356, r = 0.97, with negative allometric growth coefficient and high correlation. The growth coefficient ranged between 2.23 (January) and 3.09 (July l), being isometric six months of the year and negative allometric in the rest, with significant statis-tical difference between them. The condition factor ranged from 0,006 (July) and 0.103 (January), without statistically sig-nificant differences; confirming the premise of the inverse relationship between this parameter and the growth coefficient of length-weight relationship of Parassi mullet.

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