Relationship between post-ovulation time and fertilization rate of eggs in artificial insemination of yellowtail, Seriola quinqueradiata
H.Chuda, T. Nakao, T. Arakawa, M. Matsuyama-2001
Nippon
Suisan Gakkaishi, 67(5): 874-880 (from Current Contents)
Abstract:
This study examined the relationship between
post-ovulation time and fertilization rates of artificially inseminated eggs
of yellowtail, Seriola quinqueradiata. Ovulation was induced by a single
injection of HCG (500 IU/kg) and occurred between 36 and 54 hours. The
fertilization rates of the eggs collected from eleven fish decreased with
time after ovulation from 92.5% (0 hour) to 16.7% (48 hours). The hatching
rates of the eggs collected from the eleven fish also decreased, and were
50.3% (peak), 10.6% and finally 0% at 0, 12 and 24 hours after ovulation,
respectively. These results suggest that artificial insemination of
yellowtail must be carried out immediately after ovulation in order to
obtain eggs of good quality.
(Nagasaki Prefectural Inst Fisheries, Nagasaki
8512213, Japan, e-mail: chuda@marinelabo.nagasaki.nagasaki.jp)