Effects of body chemical components on the allometric scaling of the resting metabolic rate in four species of cyprinids.

摘要: Metabolic scaling is hypothesized to be affected by ontogenetic changes in the body chemical composition because several components do not consume significant amounts of oxygen but contribute more mass (M) as a fish grows. We tested this hypothesis assessing resting metabolic rate (RMR) and compositions lipid, protein, ash, water four species cyprinids, Hypophthalmichthys molitrix (M range 9.5–218.3 g), Cyprinus carpio 14.6–226.9 g), Carassius auratus 4.5–323.2 g), Ctenopharyngodon idellus 5.8–274.2 g). The consumption fasting was determined using continuous flow respirometer at 25 °C used assess RMR. Then, bodies were dried constant weight determine proximate compositions. No correlations detected between RMR masses water, or ash after controlling for wet any species. exponents lipid and/or significantly >1; however, represented only small proportion all These results suggest that increasing explains limited part scaling, factors other than inert may have greater contribution. There no difference exponent dry species, suggesting either has effect on exponent.