海産魚のチアミナ-ゼ1の研究-8-カタクチイワシによって飼育したハマチのチアミン要求量

概要

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The thiamine requirement of the yellowtail fed with anchovy was investigated. Yellowtail with an average weight of 13.3g were fed anchovy with or without added thiamine nitrate for 48days. The tiamine nitrate used was coated with fat in order to prevent its decomposition by the thiaminase I present in the anchovy. Both the fish that were fed anchovy as the sole food source during the entire period and those that received an additional 0.25mg of thiamine nitrate per 1kg of body weight per day, showed retardation of growth and high mortality. At the end of the experiment, the survival rate of the above fish were 4.4 and 30%, respectively. In these fish, the thiamine in ordinary muscle, serum triglyceride, serum cholesterol, hemoglobin, the hematocrit value, and the number of erythrocytes all decreased remarkably, and the pyruvic acid in the blood increased. However, these signs of thiamine defferency could be completely prevented by administering more than 1mg per day of thiamine nitrate per 1kg of body weight of the yellowtail.
日本水産學會の論文