海藻餌料および無給餌によるクロアワビエキス成分の変化

Abstract

The influence of diet on the contents of free amino acids, homarine, glycogen, organic acids, and D- and L-lactic acids were investigated in five soft parts (adductor muscle, central part of the foot muscle, rim of the foot muscle, mantle, and mid-gut gland) of juvenile disk abalone Haliotis discus fed with arame Eisenia bicyciis, with tunomata Chondrus ocellatus, and starved for a period of 46 days.The rate of gain in body weight was highest in the disk abalone fed with arame, while the moisture content was highest in the abalone fed with tunomata. The abalone fed with amame contained the largest amount of homarine. The level of glycogen in the abalone fed with amame was five times as high as that of starved abalone, and three times as high as that fed with tunomata. The content of D-lactic acid was higher than that of L-lactic acid and their ratios differed in diet and starvation. The total amounts of free aminos acid in the adductor muscle and the central part of the foot muscle were highest in the abalone fed with arame, followed by starved abalone, and were lowest in the abalone fed with tunomata. Taste-active components such as glutamic acid, glycine, and so on were rich in the abalone fed with arame, which appeared to be most tasteful.