養殖マダイの生理学的研究-1-若年魚の血液,肝すい臓などの化学成分の季節変化

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Red sea breams, Chrysophrys major, 43g body weight on the average were raised on commercial diet for more than one year, and the fish were sacrificed at intervals of about one month for the chemical analysis. Glycogen content of the hepatopancreas increased from June to August, maintained high level by the end of November, and decreased thereafter. Fat content showed similar trend for the first several months, but moved contrariwise from November 1977 to February 1978. Fat in the viscera (excluding hepatopancreas, kidney, heart and gill) increased appreciably from June to September, and then decreased gradually. Chemical constituents and enzymatic activities in plasma were rather stable except several components. Plasma inorganic phosphorus and alkaline phosphatase activity increased in accordance with rise of water temperature. GOT activity was elevated two times in 1977. The first elevation was observed from February to April with wide individual variation, and the second one from July to September. The farmer may be due to light hemolysis and some kind of unidentified disorder in hepatopancreas and/or other organs caused by improper low temperature for the fish and the latter to the promotion of the metabolic activity of the red sea bream.
日本水産學會の論文