Maturity and growth of female dusky rockfish (Sebastes variabilis) in the central Gulf of Alaska
2010
Chilton, Elizabeth A.
The dusky rockfish (Sebastes variabilis) has recently beenresurrected as a distinct species in the genus Sebastes. Reproductive biology and growth were examined for this redescribed species in the central Gulf of Alaska. Age and length at 50% maturity were 9.2 years and 365 mm fork length, respectively, which are lower than previously reported. Fertilized ova and eyed embryos were observed in April and evidence of postparturition was not observeduntil May. The gonadosomatic index decreased with the onset of postparturition in May. Von Bertalanffy growth parameters for female dusky rockfish, estimated from the maturity samples, were significantly different from growth parameters derived from Gulf of Alaska fishery-independentsurvey data.
显示更多 [+] 显示较少 [-]