Intraspecific metabolic scaling exponent depends on red blood cell size in fishes

The Journal of Experimental Biology
Yiping LuoQingda Huang

Abstract

The metabolic-level boundaries (MLB) hypothesis and the cell metabolism (CM) hypothesis have been proposed to explain the body mass scaling of metabolic rate. The MLB hypothesis focuses mainly on the influence of the metabolic level on the relative importance of volume and surface area constraints. The CM hypothesis focuses on the variation of cell size as the body grows. The surface area to volume ratio of individual cells may vary among species with different cell sizes, by which surface area constraints on metabolic scaling may change according to the MLB hypothesis. The present study aimed to extend the MLB and the CM hypotheses by proposing that, in addition to metabolic level, the varying cell surface area constraints among species also influence the intraspecific scaling exponents. The red blood cell area (S), and intraspecific scaling exponents for resting (bR) and maximum metabolic rates of four species of cyprinids were assessed. The scaling exponents varied among species, but mass-specific resting metabolic rates (RMR) of each species were similar. No significant correlation was found between S and mass-specific RMR among species. As predicted, a significantly negative relationship exists between S and bR among speci...Continue Reading

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Citations

Jan 7, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Wei XiongYiping Luo
Mar 24, 2018·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Xiao LvYiping Luo
Jun 11, 2020·PeerJ·Qian LiYiping Luo
Apr 4, 2021·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Yanqiu ZhuYiping Luo
May 3, 2021·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Xiurong YeJian Li

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