بررسي مقايسه اي سطوح برخي از هورمون هاي استروئيدي جنسي سرم خون در مولدين نارس و بالغ كفال طلايي درياي خزر (Liza auratus)

Comparative survey of some sexual steroid hormones levels of blood Serum in immature and mature breeders of grey mullet (Liza auratus) in Caspian Sea

The effect of gonadotropine hormones on gamesomeness and reproduction process in teleosts takes place via steroid hormones. Investigation in changing processes of sexual steroid in different stages includes suitable indicators to select reproduction pattern in fish. In this research, sexual steroid hormones of testosterone. Ma- hydroxy progesterone and 17/?- steroidal of immature and mature breederʹs blood serum were measured by radio immunoassay method. The results showed that there is no meaningful difference in surveyed parameters in immature and mature fish of grey mullet. The average of testosterone hormone in immature fish measured 0.11 ng/ml and in mature fish 0.1 ng/ml. The average of Ma - hydroxy progesterone hormone in immature fish was 0.09 ng/ml and in mature fish 0.03 ng/ml. The average of 17/?- hydroxy progesterone hormone in immature fish was 5.7 ng/ml and in mature fish 5.5 ng/ml. There was no meaningful difference in all examinations in 95% rate. The reason can be presence of steroid hormones in migration behaviors.