اثرات اندازه ماهي و تعداد توبركل سر روي شاخص گنادو سوماتيك و برخي خصوصيات اسپرم شناختي در ماهي سفيد Rutilus Frisii kuttum kamensky 1901

Effects offish size and breeding tubercles on gonadosomatic index and some spermatological parameters in the Mahisefid Rutilus Frisii kuttum kamensky 1901

The tubercles of teleosts are induced by several sex hormones and fan off shortly after spawning. During this study which was carried out in Gorganrood for 3 months, the correlation between secondary sexual characters and fish size with gonadosomatic Index and spermatological parameters (spermatocrit, sperm volume, sperm concentration and duration of sperm motility) of Mahisefid Rutilus frissi kutum kamensky 190I was investigated. 10 samples semen of Mahisefid was gathered with 5cc syringes and immediately were transferred to laboratory with ice flask and based on the number of their breeding tubercles divided to 3 categories: tubercles>100 (I treatment), 80-100 (2 treatment), and tubercles <80 (3 treatment). With increase of head tubercles, total length (P<0.05), sperm volume (P0.05). The results of Pearson test indicated that head tubercles with total length, total weight and gonad weight (P0.05) were found between gonadosomatic index with sperm parameters and fish size.