Open AccessPROTEIN UTILIZATION IN THE FRESHWATER SHRIMP Macrobrachium rosenbergii
Author(s) -
Clifford H. C.,
Brick R. W.
Publication year - 1978
Publication title -
proceedings of the annual meeting ‐ world mariculture society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 60
eISSN - 1749-7345
pISSN - 0164-0399
DOI - 10.1111/j.1749-7345.1978.tb00243.x
Subject(s) - respiratory quotient , excretion , macrobrachium rosenbergii , nutrient , carbohydrate , biology , catabolism , food science , nitrogen , shrimp , assimilation (phonology) , biochemistry , chemistry , zoology , metabolism , fishery , ecology , linguistics , philosophy , organic chemistry , prawn
Experimental diets were fed to juvenile Macrobrachium rosenbergii with subsequent measurement of metabolic response in terms of oxygen consumption and nitrogen excretion. Dietary formulation was evaluated by correlating observed metabolic response with levels of protein, lipid and carbohydrate in the diet. Rates of oxygen uptake and nitrogen production were also used to quantify sparing and specific dynamic action (SDA), 2 physiological processes known to influence nutrient utilization. Comparative analysis of the magnitude of sparing and SDA as well as calculation of several closely related qualitative indices of assimilation (atomic O:N, respiratory quotient) provide a suitable means of determining the dietary formulation producing the most efficient utilization of dietary protein. Preliminary results indicate that protein influences the magnitude Of SDA in the 15–25% range of dietary protein levels; levels in excess of 25% had no effect on SDA. In addition, SDA appears to be a threshold phenomenon, operating independently on the quantity of food intake. Measurements of exogenous nitrogen excretion and corresponding O:N ratios suggest that a fat:carbohydrate ratio of 1:3‐1:4 results in more efficient utilization of dietary protein than ratios of 1:l or 1:2, which result in excessive mobilization of protein for catabolic purposes.