The Investigation of Reproduction Indices of Scomberoides commersonnianus in the North- West of Persian Gulf

Scomberoides commersonnianusis one of the important commercial species of Carangidae, which has great nutritional value. Determining the maturity and spawning time is essential in studies of biology, behavior, fishery management and aquaculture. Gonadosomatic and hepatosomatic indices, length at 50% maturity, sex ratio for the determination of reproduction time and sex maturity were investigated in the present study during a 15-month period of sampling. The results showed that there was no significant difference in sex ratio between males and females. LM 50% was estimated at 59.5 cm for females and 50.2 cm for males. This fish spawns once a year and the spawning period lasts from April to August. Also, the gonadosomatic index peaks in June.