Abstract
Feeding behavior is stimulated when fish are fed diets supplemented with Antarctic krill, Euphausia superba, meal. An electrophysiological method was used to study the olfactory and gustatory responses of sea bream, Pagrus major, to extracts of krill meal, non-muscle krill meal, and white fish meal. It was observed that the non-muscle krill meal elicited the strongest responses; non-muscle krill meal gave about 1.5 times and krill meal 1.2 times the response of the white fish meal. Amino acid analysis of the meals indicated that non-muscle krill meal was high in sarcosine, proline, glutamic acid, arginine and glucosamine. These amino acids are believed to be the cause of the gustatory and olfactory responses observed. Several diets containing these amino acids were tested for feeding stimulation in sea bream. It was shown that sea bream feeding was stimulated mainly by proline, glycine and glucosamine.
Published Version
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