Identification of Feeding Stimulants for Yellowtail in Muscle Extract of Jack Mackerel.

Accession number;01A0744153
Title;Identification of Feeding Stimulants for Yellowtail in Muscle Extract of Jack Mackerel.
Author; HOSOKAWA HIDETSUYO (Kochi Univ., Fac. of Agric.) TAKII KENJI (Kochi Univ., Fac. of Agric.) SHIMENO SADAO (Kochi Univ., Fac. of Agric.) TAKEDA MASAHIKO (Kochi Univ., Fac. of Agric.)
Journal Title;Suisan Zoshoku
Journal Code:Y0285A
ISSN:0371-4217
VOL.49;NO.2;PAGE.225-229(2001)
Figure&Table&Reference;TBL.6, REF.30
Pub. Country;Japan
Language;Japanese
Abstract;To identify the feeding stimulants for yellowtail, Seriola quinqueradiata in muscle extract of jack mackerel, Trachurus japonicus, various synthetic extracts simulating the composition of the natural extract were prepared, and a series of feeding trials was conducted using purified casein diets flavored with them. A complete synthetic extract containing all 3 groups of components(amino acids, nucleotides and organic bases) exhibited a comparable feeding stimulant activity to that of the natural extract. When nucleotides were omitted from the complete synthetic extract, the activity disappeared. However, synthetic extracts lacking one of the other 2 groups still showed very strong activities, near to that of the complete synthetic extract. Among the synthetic extracts containing one of the 3 groups, only the extract containing nucleotides exhibited very strong activity. Omission tests conducted on the group of nucleotides showed that inosinic acid was responsible for the activity, while the other constituents, such as inosine, adenylic acid, adenosine diphosphate and adenosine triphosphate, made little contribution, if any. Therefore, the activity of the natural extract was thought to be mainly due to inosinic acid. In tests of individual nucleotides, adenosine diphosphate and adenosine triphosphate were also found to be stimulative at concentrations greatly exceeding that in the natural extract. (author abst.)
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