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Biochemical composition and nutritive value of krill ( Euphausia superba Dana)
Author(s) -
Sidhu G. S.,
Montgomery W. A.,
Holloway Gwenda L.,
Johnson A. R.,
Walker D. M.
Publication year - 1970
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740210606
Subject(s) - euphausia , krill , antarctic krill , food science , casein , composition (language) , dry matter , chemistry , polyunsaturated fatty acid , threonine , biology , botany , biochemistry , fishery , fatty acid , enzyme , serine , linguistics , philosophy
Frozen samples of Antarctic krill ( Euphausia superba Dana) were found to contain 71·4% moisture, and on a dry matter basis 24·6% lipid, 49% protein (N × 6·25), 2·5% chitin, and 9·8% ash. Fatty acids from the crude lipid fraction were made up of 43·8% saturated, 32·8% mono‐unsaturated, and 23·4% polyunsaturated types. Krill protein concentrate prepared as a light, free‐flowing powder by isopropanol extraction of krill contained 74·3% crude protein, 15·4% ash, 6% chitin and 0·3% lipid, and was rich in lysine, arginine, tryptophan, and threonine. The protein efficiency ratio of this concentrate was found to be the same as that of casein. The significance of these results in relation to those obtained for other fish protein concentrates is discussed.