Reproductive Biology of Lizard Fish, Saurida tumbil (Forskal) in the Jizan Region of the Red Sea بيولوجية التكاثر للسمكة السحلية Saurida tumbil في منطقة جيزان في البحرالاحمر
1996
A. BAKHSH
The reproductive biology of lizard fish Saurida tumbil in the Jizan region of the Red Sea was studied during 1986. Females outnumbered males and attained larger size than males. Among young individuals male s were more numerous than females, while in older age groups the females were more num erous. There is no significant difference in length-weight relation ship between the sexes . The equa tion for the two sexes are found to be log w = - log 1.954 + 2.958 log L Th e smallest size at first maturity was 11cm for males and 13cm for females. About 50% of the fem ales were mature at a length of 19 cm. Th e spawning of males and femal es extended throughout the year. The greatest amount of spawning was observed during winter . Gonado-carcass ratio of fem ales was high from October to May . Spawning is often concentrated at the time of the year when prevailing winds or current s ar e at their weakest. Monthly vari ations in the visceral carcass ratio and relative condition were analysed for both sexe s in relation to spawning activity. Thi s species is carnivorous and feeds mainly on fish . تمت دراسة بيولوجية التكاثر لسمكة السحلية Saurida tumbil في منطقة جيزان في البحر الأحمر عام 1986م ، وقد وجد أن الإناث أكبر حجما أو أكثر عددا من الذكور في الأطوار البالغة أما في الأطوار اليافعة فالذكور أكثر تعدادا من الإناث. ولا توجد علاقة إحصائية بين الوزن والطول لكلا الجنسين، وبالتالي تم توحيد معادلاتهما لتصبح كالآتي :
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