ホルモン投与による雌ウナギの成熟促進と成熟中の肝臓および血液性状の変化について

概要

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Catadromous female eel, Anguilla japonica, caught at the mouth of the Shimanto River, Kochi Pref., on November 10, 1972, and kept in small tanks without food were treated with dipropionic acid estradiol and gonadotropin from autumn to spring of the following year to induce ovarian maturation. Of nine samples treated with both hormones, four appeared to possess mature eggs, attaining a degree comparable to the migratory nucleusstage. The liver of these samples became enlagred with growth of the ovary, and were characterized by vacuoles located in the cytoplasm of numerous hepatic cells. It was also confirmed chemically that the liver of these fish contained a large amount of crude lipid. Hematocrit value, hemoglobin content and erythrocyte count were lower than those of untreated ones to a certain degree.
日本水産學會の論文