マダイ稚魚の脂質蓄積と絶食耐性〔英文〕

概要

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In order to evaluate the quality of artificial seed of red sea bream Pagrus major which might influence recruitment efficiency, various sized artificial seed were submitted to analysis of body constituents and starvation test in relating to survival in the natural environment. Lipid contents of muscle and intraperitoneal fat body (IPF) increased with the progress of growth. Gradual increase in triglycerides (TG) was found in muscle. TG of IPF became con-stant at 35mm in body length. Starvation tolerance increased with growth processed and was higher in the larger fish. The fish with a high starvation tolerance could consume preferentially TG in muscle and IPF during starvation by supressing exhaustion of muscle protein. Starvation tolerance cosely correlated to TG level which was subject to fish size rather than age. Accordingly, low starvation tolerance of smaller fish could be explained owing to low TG accumulation.