ハマチ用精製基本飼料の検討〔ハマチの栄養要求に関する研究-1-〕

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In order to establish a basal diet suitable for a nutritional requirement study of yellowtail Seriola quinqueradiata, the nutritive values of two pruified test diets used previously for yellowtail were tested by comparing the effects of the diets on the growth of young yellowtail and on the feed efficiency. The casein (T-diet) and casein gelatin (Y-diet) diets were the test diets. When fed the T-diet, fish in the 10g (average body weight) size group exhibited high growth and the diet produced high feed efficiency. However, fish in the 20g or 40g (average body weight) size group when fed the same diet experienced low growth with high mortalities; the feed efficiency also was low. The fish in the 10g size group fed on the Y-diet exhibited high feed intake, but their growth was quite poor, As a result, the feed efficiency of the Y-diet was extremely low. The low nutritive value of the Y-diet was thought to be attributable to its low pH (4.7). Therefore, the diet was ad-justed to pH 6.7 with 3% sodium hydroxied (Yp-diet). This diet produced high growth of fish and high feed efficiency, and its nutritive value was superior to those of T-diet and Y-diet. From these results, we propose that the Yp-diet (pH about 6.7) composed of 64.2% casein, 13.5% gelatin, 90% pollack liver oil, 7.0% mineral mixture, 3.0% vitamin mixture, 2.3% supple-mental amino acids, and 1.0% attractants can be used as a provisional basal diet for the nutritional study of yellowtails.
日本水産學會の論文

ハマチ用精製基本飼料の検討〔ハマチの栄養要求に関する研究-1-〕

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