New Zealand Journal of Marine and Freshwater Research abstracts

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Chemical composition and nutritive value of antarctic krill {Euphausia superba) and southern blue whiting {Micromesistius austral is)

G. P. SAVAGE*

M. J. FOULDS

Department of Agricultural Biochemistry and Nutrition
University of Newcastle-upon-Tyne
NE1 7RU, United Kingdom

Abstract Freeze-dried or oven-dried antarctic krill (Euphausia superba) and southern blue whiting (Micromesistius australis) (SBW) were analysed for their proximate and amino acid contents. Each sample was then combined into semi-purified diets and fed to male weanling rats. The krill and SBW meal provided the sole source of protein in each diet. The true digestibility of the protein of all diets was consistently high (94.0-96.6%). The mean biological value (BV) of the SBW meal was 78.7, similar to that of white fish meal (81.0). The krill meal had significantly lower £K(mean 65.9), which could be significantly improved on addition of 0.1% DL-methionine (BV 75.6) or 0.1% cystine (BV 72.9).

Keywords antarctic krill; southern blue whiting; meals; chemical composition; true digestibility; biological value; net protein utilisation; protein efficiency ratio.

New Zealand Journal of Marine and Freshwater Research, 1987, Vol. 21: 599-604 0028-8330/87/2104-0599$2.50/0 © Crown copyright 1987 Received 29 October 1986; accepted 5 February 1987

PDF file of entire paper: medium quality (460K); (scanned from paper original: notes about this process)

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