Incubation rate and larvae size of Persian sturgeon ( Acipenser persicus Borodin 1897) in relation to sperm restripping.

In this study, 11 wild male brood fish were used and their mean ages were 15.08 ± 1.66. The luteinizing hormone-releasing hormone analogue (LH-RH-A2) was used to stimulate twice in few days interval (3-7 days) and then semen samples were stripped. The results showed that there was significant difference among the percentage of motile spermatozoa, sperm density and spermatocrit during two strippings ( P < 0.05). The duration of sperm motility in first and second stripping was 315/83 ± 162.16 and 212.5 ± 110.53 s respectively. Also, sperm pH was 8.41 ± 0.53 and 8.05 ± 0.33 in first and second stripping respectively. There was significant differences between hatching rate, as well as larvae size significantly changed in both hatching and initiation of active feeding ( P < 0.05). [ABSTRACT FROM AUTHOR]