鯨油の研究-XII. Calanus cristatus脂質(その1) : 北洋ナガス鯨胃中のCalanus cristatus

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Calanus cristatus, collected in the stomach of fin whale caught at the Northern Pacific Ocean, was extracted by alcohol, acetone and ether, and reddish brown oil was obtained. The content of oil of the specime ?? was 58.63 pe ?? cent. in dry matter, and the amount of unsaponifiable matter of the oil was 43.1 per cent. The mixed fatty acids of this lipid are composed of 16% saturated acids (myristic 9%, palmitic 7% and trace of C18) and 84% unsaturated acids (C14 3%, C16 10%, C18 14%, C20 29% and C22 28%). The observed existence of large amount of unsaturated C20 and C22 acids is noteworthy. Our results indicates that the Calanus cristatus which feed on diatoms and other marine phytoplankton having a fat containing a relatively small amount of unsaturated C20, and only a little of C22 acids, comes to possess a fat having significant amounts of unsaturated C20 and C22 acids.
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