Abstract

To investigate effect of on sexual maturation in spotted seabass, Lateolabrax maculatus the sexual maturation, photoperiods were established to natural photoperiod, 9L:15D, 11L:13D, 13L:11D and 15L:9D. After rearing for 90 days from August 11 to November 10, gonadosomatic index (GSI) and hormones were analyzed. In the female, GSI was in the natural photoperiod, in 9L:15D, while the GSI of male was in the natural photoperiod, in 9L:15D and in 15L:9D and the lowest in 15L:9D, respectively. The blood estradiol (E2) of female was in the natural photoperiod, and the highest value of in 9L:15D. The male was similar to the female with in the natural photo period and in 9L:15D. The testosterone (T) of male was in the natural photoperiod, but the hightest value of in 9L:15D. These results provide basic information from sexual maturation of spotted seabass.

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