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Tissue depletion and energy utilisation during routine metabolism by sub‐adult Tilapia rendalli boulenger
Author(s) -
Caulton M. S.
Publication year - 1978
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1978.tb03407.x
Subject(s) - biology , catabolism , energy metabolism , tilapia , starvation , fish <actinopterygii> , metabolism , energetics , zoology , protein catabolism , energy requirement , basal metabolic rate , biochemistry , food science , ecology , endocrinology , fishery , amino acid , psychology , regression , psychoanalysis
The amount of fat and protein used by young Tilapia rendalli during starvation can be quantitatively assessed and correlated to the condition of the fish. It was shown that fish in good condition used fat in preference to protein during catabolism, irrespective of the time period of starvation, but this rapidly reversed as condition declined and fish in medium and poor condition utilised more protein than fat to maintain routine metabolism. The amount of energy required during routine metabolism was not affected by the ratio of fat to protein used and a mean energy requirement for these fish (varying between 40 and 60 g in mass) was estimated as 45.03 J g‐ 1 d ‐1 at 23°C. This estimate of routine metabolic energy requirement can be equated to oxygen consumption using an oxy‐energy coefficient of 13.68 J mg O 2 ‐1 .