Abstract
ABSTRACTThe aim of the present study was to analyze the reproductive aspects of the fat snook, Centropomus parallelus, in a tropical estuary. During the study period, 187 specimens were collected, including 73 females and 114 males. The length at first sexual maturity was estimated to be 224 mm for the females and 141 mm for the males. An extensive reproductive period, January to August, was observed for the females based on the gonadosomatic index. For the males, the highest values were from July to October. Sexual segregation was observed in length classes, with predominance of males and females in the smaller and larger sizes, respectively. This pattern, observed in protandric hermaphrodites, has been confirmed with the identification of an individual in sexual transition. The average relative fecundity was 14,260 oocytes. The average absolute fecundity was 491,036 oocytes/female, and the average size of the vitellogenic oocytes was 435 µm. Management actions are suggested for better conservation of the species.
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