Declining metabolic scaling parallels an ontogenetic change from elongate to deep-bodied shapes in juvenile Brown trout  

作　　者：Jorge-Ruben Sanchez-Gonzalez Alfredo G.Nicieza 

机构地区：[1]Department of Organisms andSystems Biology,University of Oviedo,33006O Oviedo,Spain [2]Biodiversity Research Institute(IMIB),University of Oviedo-Principality of Asturias-CSIC,33600 Mieres,Spain [3]Department of Animal Science-Wildlife Section,University of Lleida,25006 Lleida,Spain

出　　处：《Current Zoology》2023年第3期294-303,共10页动物学报（英文版）

基　　金：This work was supported by the Principality of Asturias(grant no.CN-07-164);the Spanish Government(grants no.MEC-CGL2004-03239/BOS and MMA/86-2003-1);FICYT(predoctoral fellowship BPO4-147 to J.R.S.G.)。

摘　　要：Body shape and metabolic rate can be important determinants of animal performance,yet often their effects on influential traits are evaluated in a non-integrated way.This creates an important gap because the integration between shape and metabolism may be crucial to evaluate metabolic scaling theories.Here,we measured standard metabolic rate in 1-and 2-years old juvenile brown trout Salmo trutta,and used a geometric morphometrics approach to extricate the effects of ontogeny and size on the link between shape and metabolic scaling.We evidenced near-isometric ontogenetic scaling of metabolic rate with size,but also a biphasic pattern driven by a significant change in metabolic scaling,from positive to negative allometry.Moreover,the change in metabolic allometry parallels an ontogenetic change from elongate to deep-bodied shapes.This is consistent with the dynamic energy budget(DEB)and surface area(SA)theories,but not with the resource transport network theory which predicts increasing allometric exponents for trends towards more robust,three-dimensional bodies.In addition,we found a relationship between body shape and size independent metabolic rate,with a positive correlation between robustness and metabolic rate,which fits well within the view of Pace-of-Life Syndromes(POLS).Finally,our results align with previous studies that question the universality of metabolic scaling exponents and propose other mechanistic models explaining the diversity of metabolic scaling relationships or emphasizing the potential contribution of ecological factors.

关 键 词：biphasic allometric scaling metabolic rate ontogenetic allometry shape SURFACE-AREA TROUT 

分 类 号：Q95[生物学—动物学]