LHRHポリマ-ペレットによるアユの最終成熟・排卵促進の試み〔英文〕

概要

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A nonbiodegradable copolymer pellet of luteinizing hormone-releasing hormone (LHRH) was first examined to induce final oocyte maturation and ovulation in ayu Plecoglossus altivelis. LHRH copolymer pellet (100 or 50μg/pellet/fish) induced ovulation in all fish on 3 days following implantation and their success rates were much higher than those of pituitary homogenates used in the present study. Ultrastructural observation showed a marked degranulation in the gonadotropic cells of the fish treated with the copolymer pellet. In vitro experiment showed that copolymer pellet released native LHRH at a retatively constant rate for 75 days. These results suggest that LHRH copolymer pellet used in this study is useful for a long time treatment of LHRH to induce sexual maturation in fish.
日本水産學會の論文