Chakraborty SC ; Ross LG ; Ross B ;

Aquaculture Nutrition vol. 1 (3)   pp. 179-187, 1995

Inst. Aquacul., Stirling Univ., Stirling FK9 4LA, Scotland, UK

The total energy budget of 65 plus or minus 8.0 g common carp, Cyprinus carpio L., was studied in the laboratory. The pattern of energy allocation varied with dietary protein content and ration levels. The energy lost as heat of metabolism, R, was found to increase with dietary protein level and total ration. Energy lost as faeces, F, varied from 19% to 24% of consumption, C, but did not appear to be related to either protein content or ration levels. The energy equivalent of nitrogenous excretion, U, as a proportion of C increased with an increase in dietary protein but decreased with an increase of ration level. Regression equations were developed from the data to allow prediction of respiratory energy losses, faecal losses and excretory losses. The balance of energy budgets compiled from experiments conducted over an 18-day period was between 66% and 82%. Observed growth was always less than predicted growth, so the predictive models overestimated growth. The data presented form the basis for the first reported study of total energy budgets in Cyprinus carpio

Fish culture ;  Feeding experiments ;  Proteins ;  Metabolism ;  Energy budget ;  Growth ;  Bioenergetics ;  Feed composition ;  Cyprinus carpio ;