عنوان مقاله [English]
This study was carried out (2010) in the Shahid Beheshti Sturgeon Rearing and Propagation Center and International Sturgeon Research Institute (Rasht). For this research 11 wild male brood fish of Persian Sturgeon were used. Each broodfish received hormonal injection twice in 3-7days intervaland then sperm samples were stripped. Sperm from 6 brood fish used for second time were collected. The results showed that the mean rate of sperm motility in the first and second sperm stripping were 78.5±5.43% and 50.0±20.25% respectively.Also the mean duration of sperm motility in the first and second stripping were 315.83±162.16 and 212.5±110.53 seconds respectively. The mean sperm density in the first and second sperm stripping were 2.1±1.3×109 and 0.55±0.34×109/ml respectively and also the mean spermatocrit level in the first and second sperm stripping was 9.33±3.32 and 3.42%±3.35 respectively. Similarly mean sperm pH was 8.41±0.53 and 8.05±0.33 in the first and second stripping respectively. Based on results obtained rate of sperm motility, spermatocrit and sperm density were significantly different (P<0.05) between the two stages of sperm stripping. Despite of decrease in duration of sperm motility and sperm pH in the second stage of stripping, there was no significant difference (P>0.05) between the two repetitions.