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Objectives : To study some aspects of reproductive biology of Pomadasys jubelini (Cuvier, 1830) in the three lagoons complex (Grand-Lahou, Ebrie and Aby) of Cote d’Ivoire in relation to sex ratio, size at first maturity, spawning season and fecundity. Methodology and results : Fish were sampled with gill nets from January 2007 to December 2008. The whole sample consisted in 2284 specimens with fork length ranging from 8.50 to 32.70 cm and weight from 8.00 to 780.72 g. The sex ratio was in favour of males with 1:0.82, 1:0.63 and 1:0.56 respectively in Grand- Lahou, Ebrie and Aby lagoons. The length at first maturity was 14.48 cm (males) and 15.92 cm (females) in Grand-Lahou lagoon, 12.13 cm (males) and 14.70 cm (females) in Ebrie lagoon, and 14.03 cm (males) and 15.08 cm (females) in Aby lagoon. Both monthly gonadosomatic index and macroscopically determined gonad stages indicated that P. jubelini spawned from November to April in three lagoons. The absolute fecundity ranged from 46856 to 131208 eggs (Grand-Lahou lagoon), 46184 to 126959 eggs (Ebrie lagoon), and from 17184 to 129459 (Aby lagoon). The frequency distribution of oocytes diameters was unimodal. Conclusion and application : The results suggest that P. jubelini has very good parameters and can be used as farmed fish. Key words: Pomadasys jubelini , Sex ratio, Sexual maturity, Spawning, Fecundity, Lagoons, Cote d’Ivoire.

Reproductive biology of the Sompat grunt, Pomadasys jubelini (Cuvier, 1830) in Côte d’Ivoire lagoons complex (West Africa)