The effects of broodstock age on consecutive spawning performance of wild-caught ablated Fenneropenaeus
2010
Daryaei, A.R. | Yahyavi, M. | Kamrani, A.
The effects of broodstock age on consecutive spawning performance of wild-caught ablated Fenneropenaeus indicus females in four age groups 6, 8, 12, and 14 months old were studied. Assessment duration was 30 days. Age groups were determined based on carapace length of broodstock caught from Jask fishing ground. Maximum female partnership percentage in consecutive spawning was for 12 months old group. Correlation between egg production and hatch in each spawning with number of spawning in 12 months old broodstock was weaker than other groups but this relation has negative and significant (r = -0.38, P<0.01). Average hatch rate in 8 and 12 months old group showed no significant difference (P>0.05) but others groups had significantly higher hatch rate (P<0.05). In general, 12 month group of wild-caught ablated Fenneropenaeus indicus females showed much higher number of egg produced, hatch percentage, females partnership percentage for 4 spawning in the 30 days period.
显示更多 [+] 显示较少 [-]