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- W2028171570 abstract "The objective of this study was to characterize biochemical indices of oxidative metabolism in trabecular cardiac muscle of female rainbow trout over a 200-fold size range. We also examined scaling effects on plasma concentrations of protein, albumin, and non-esterified fatty acids (NEFA). Animals were sampled from four size categories (<20 g, 100–200 g, 300–400 g and >2 kg). Ventricle mass relative to body mass was size-dependent, with the smallest trout having smaller hearts. Total protein in cardiac tissue was 20% higher in animals weighing over 300 g compared to fish less than 200 g. Plasma albumin and protein were increased 50–70% in trout over 100 g compared to fish smaller than 20 g. NEFA in plasma were similar for all animals. Activities of carnitine palmitoyltransferase and cytochrome oxidase were elevated 53% and 38%, respectively, in trabecular cardiac muscle of the largest trout compared to the smallest animals. Citrate synthase activity was independent of heart size, suggesting that the increase in oxidative capacity was not due to an increase in mitochondrial density. The increased capacity to bind and transport fatty acids in blood and the higher oxidative capacity of cardiac muscle may reflect a metabolic adaptation for increased oxidation of fatty acids and ventricular performance in larger female trout. These findings are not consistent with the scaling paradigm of oxidative metabolism and may reflect changes in ventricular architecture with ontogeny." @default.
- W2028171570 created "2016-06-24" @default.
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- W2028171570 date "1999-04-01" @default.
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- W2028171570 title "Effects of body size on biochemical characteristics of trabecular cardiac muscle and plasma of rainbow trout (Oncorhynchus mykiss)" @default.
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- W2028171570 doi "https://doi.org/10.1016/s1095-6433(99)00023-9" @default.
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