Study of some reproduction parameters of Arabian catfish shark (Chiloscyllium arabicum, Gubanov, 1980) in Hormozgan, Persian Gulf

This study was done to investigate of some reproductive parameters of Arabian carpetshark, Chiloscyllium arabicum. A total of 750 specimens of Arabian carpetshark were collected, of which190 samples were male (49.86%), and 191 were female (50.13%). The overall sex ratio wasobtained (0.99: 1.00) (p>0.05). Condition factor of female (1.29±0.003) was significantly more than male shark (1.17±0.002). The highest of condition factor was obtained in April and November for male (1.27±0.003) and female (1.42±0.003) respectively. Also, the lowest of this factor was observed in July for male (0.98±0.002), in April for female (1.09±0.004). The beginning of the rise in gonadosomatic index was from April which reach to maximum value in June (5.99). After a negligible decrease of GSI in July, reaching the lowest value in November (0.44). In this study, maximum and minimum of fecundity were 38 eggs (71.6 cm in total length and 1624 g in weight) and 10 eggs (52.6 cm in total length and 516 g in weight) respectively. Maximum of female shark with egg and embryo was observed in June. Also, 24 embryos were counted from May to August.