駿河湾産深海鮫の卵油について

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Succeeding the previous works egg oil of deep-sea benthonic sharks caught by long line in Suruga Bay was analysed (Table 1). Egg lipids were separated after saponification to fatty acids and unsaponifiable matters which were further classified on a Florisil column into hydrocarbon, cholesterol, and glyceryl ether fractions. Compositions of fatty acids and long-chain alcohol groups of glyceryl ethers were determined by gas chromatography. Contents of unsaponifiable matters (21-44%) and hydrocarbons (10-31%) were remarkably lower and the differences among the shark species, therefore, were smaller than those of the liver oil reported in the previous papers (Tables 1 and 2). While cholesterol contents of egg oil were very high ranging between 33 and 59mg/g (Table 3), glyceryl ether contents and the compositions of its long-chain alcohol groups were similar to the liver oil (Tables 3 and 4). Fatty acid compositions showed high amounts of highly unsaturated acids such as 20:5 and 22:6 acids (Table 5). In regard to the results of samples No. 10-13 attached to embryos the egg lipids seemed unchanged during growth of the embryos as far as the investigated components were concerned (Tables 2 and 3). Moreover, about a quarter of the egg oil was transfered to the embryo liver after minor changes were occurred in fatty acid and glyceryl ether compositions (Tables 4 and 5). Abnormal sample of No. 9 having no form of each egg but bulky egg-stuff in uteri showed severely low percentages of oil and of the unsaponifiables (Table 1).
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駿河湾産深海鮫の卵油について

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