胎盤性生殖腺刺激ホルモン(HCG)の多回投与のアユの排卵並びに卵質に与える影響について〔英文〕

概要

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The effects of repeated treatments of HCG on ovulation and egg qualities in ayu were investigated in this study. HCG 1000 or 750 IU-treated fish indicated high percentages of fertilization and hatching, whereas in HCG 500 or 100 IU-treated fish values were very low. Other indices such as egg stage and water content of eggs were also different between groups receiving single or repeated injections of HCG. In correspondence to the change in egg qualities the fish treated with 1000 or 750 IU showed an increase in body weight. But the groups receiving repeated injections of HCG 500 or 100 IU showed a decrease in body weight. Thus body weight change may be an appropriate index for determing egg quality. In the groups treated with repeated injections of HCG 500 or 100 IU the serum corticoids were higher than in the saline or HCG 1000 IU group. Furthermore, the relationship between these high titers of corticoids and egg quality was discudded.
日本水産學會の論文