The study of sex and pituitary hormone levels and stress factors in serum of Persian sturgeon (Acipenser persicus) broodstocks catched in coast of Guilan

The main goal was comparing some main sex and pituitary hormones of serum such as testosterone, 17β estradiol, GTH-I, GTH-II and stress indicators as cortisol and glucose in both male and female bloodstocks of Persian sturgeon (Acipenser Persicus) , which were catched from sea and assessing the relation of matural level with this sex hormones and the stress of migration and catching in this fish species. Sampling fourteen males and females serum has been done there from winter to spring 2013, in some Guilan sturgeon fishery stations. The results of gonadal examination showed that the broodstocks were in IV and V mature levels. After comparing serum steroids, there were much statistical significant differences in amount of testosterone in males (123.41±32.18 ng/ml) and females (44.87±18.92 ng/ml) (p˂0.05). But in the amounts of 17β estradiol, GTH-I and GTH-II, there were no statistical significant differences between males and females (p˃0.05). All of hormones were seen in males more than in females. After comparing stress factors as cortisol (587.42 ng/ml in males and 608.42 ng/ml in females) and glucose (138/85±31.02 mg/dl in males and 136/85±26 mg/dl in females) there were no statistical significant difference between males and females; but levels of this factors were much more than normal levels (p˃0.05).