Investigating the relationship between blood indices and stages of sexual maturity in unmatured great sturgeon (Huso huso)
Subject Areas : Journal of Aquatic Sciences
1 - IFRO
Keywords: Great sturgeon, Maturity, Sturgeon, Gonadal growth,
Abstract :
Understanding the relationship between gonadic stages and blood indices and the awareness of blood changes in immature fishes will provide a broad perspective regarding the determination of the most suitable time of hormone induction and reducing the long-term reproduction time of valuable sturgeon fish. In this research, the effect of gonadal characteristics on biochemical and hormonal indicators of blood was investigated. First, a piece of fish was removed by biopsy surgery, and the different stages of processing were examined by the hematoxine-eosin method. Blood glucose was measured by enzymatic method, calcium and magnesium by spectrophotometric method, sodium and potassium by flame photometer and cortisol, testosterone, progesterone and estradiol hormones were measured by RIA method with gamma counter. The results of statistical studies showed that among blood biochemical factors in males only magnesium has a significant and inverse relationship and in females only glucose and sodium have a significant direct relationship. Among steroid hormones, testosterone in males and cortisol in females had a significant direct relationship (p<0.01). Therefore, it can be stated that in males, with the progress of the stages of sexual maturity, blood magnesium decreases and testosterone increases. In the female gender, with the progress of the stages of sexual maturity, blood cortisol increases, and the lack of correlation between progesterone and estradiol hormones in the female gender is probably due to the immaturity of the fish. In the end, it can be stated that by using these connections and changes in blood levels,
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