絶食時におけるハマチの血液,肝すい臓の化学成分などの変化について
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概要
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Accompanying the progress in fish culture, the control of fish diseases is a serious problem in this country. Recently the estimation of biochemical components in serum has been employed in the diagnosis of diseased fish. However, evaluation of the results is somewhat difficult owing to the scanty information on the clinical chemistry of fishes. Decreased appetite is frequently observed in many kinds of fishes as an initial disease symptom. Accordingly, a better understanding of the physiological changes in serum following fasting should not be disregarded in the diagnosis of fish. In the present paper, the effect of starvation on the chemical components in serum, hepatopancreas and muscle of yellowtail (Seriola quinqueradiate) is described. Yellowtail of average weight 265g were kept without food for 50 days and, after a definite time, were sacrificed for chemical analysis. The glycogen level in the hepatopancreas decreased after 2 days of fasting. This decrease persisted until the 22nd day after which a slight increase was recognized. Although the fat content in the muscle and hepatopancreas dropped sharply within 3 days, a fairly large amount of oil was observed around the 10th and 32nd days in muscle and hepatopancreas, respectively. Serum β-lipoprotein, total cholesterol and protein decreased drastically after 2 to 5 days of fasting. The triglyceride content, which decreased during the initial 5 days showed a conspicuous increase 22 and 32 days later. On prolonged starvation a new fraction was recognized in the electrophoretic pattern of the serum glycoprotein. GPT activity in the serum increased after 32 and 50 days but that of GOT did not change during the 50 days.
- 日本水産學會の論文