title: Effect of body size on organ-specific mitochondrial respiration rate of the largemouth bronze gudgeon.
abstract: The effects of body size on the mitochondrial respiration rate were assessed in the heart, brain, gill, liver, and red muscle of largemouth bronze gudgeon, Coreius guichenoti, from the Yangtze River. Body mass had a significant influence on the state 3 oxygen consumption rate of the mitochondria from the heart, gill, and red muscle. The relationships between body mass (M, g) and state 3 oxygen consumption rate (V(state 3), nmol O min(-1) mg(-1)) of the mitochondria were represented by the following: V(state 3) = 3.56M(0.71) for heart, V(state 3) = 4.64M(0.50) for red muscle, and V(state 3) = 473.73M(-0.82) for gill. There was a significant difference in V(state 3), V(state 4), and respiratory control ratio among organs and all were highest in the heart. Our results suggest that the relationship between mitochondrial respiratory rate and body size varies among organs. The high mitochondrial respiratory rate in the heart of the largemouth gudgeon suggests that it has the highest oxidative capacity.
authors.affiliation: Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Science, Southwest University, Chongqing 400715, China. luoguo@swu.edu.cn
authors.forename: Yiping
authors.initials: Y
authors.lastname: Luo
authors.forename: Wen
authors.initials: W
authors.lastname: Wang
authors.forename: Yurong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qingda
authors.initials: Q
authors.lastname: Huang
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D049628:Body Size / Q000502:physiology*; D001921:Brain / Q000378:metabolism; D019069:Cell Respiration / Q000502:physiology*; D002681:China; D003530:Cyprinidae / Q000502:physiology*; D005880:Gills / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D018482:Muscle, Skeletal / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism; D010101:Oxygen Consumption / Q000502:physiology