Individuals exhibit consistent differences in their metabolic rates across changing thermal conditions

Auer, S. K., Salin, K., Anderson, G. J. and Metcalfe, N. B. (2018) Individuals exhibit consistent differences in their metabolic rates across changing thermal conditions. Comparative Biochemistry and Physiology. Part A: Molecular and Integrative Physiology, 217, pp. 1-6. (doi:10.1016/j.cbpa.2017.11.021) (PMID:29223611)

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Abstract

Metabolic rate has been linked to growth, reproduction, and survival at the individual level and is thought to have far reaching consequences for the ecology and evolution of organisms. However, differences in metabolic rate among individuals must be consistent (i.e. repeatable) over at least some portion of their lifetime in order to predict their longer-term effects on population dynamics and how they will respond to selection. Previous studies demonstrate that metabolic rates are repeatable under constant conditions but potentially less so in more variable environments. We measured the standard (= minimum) metabolic rate, maximum metabolic rate, and aerobic scope (= interval between standard and maximum rates) in juvenile brown trout (Salmo trutta) after 5weeks acclimation to each of three consecutive test temperatures (10, 13, and then 16°C) that simulated the warming conditions experienced throughout their first summer of growth. We found that metabolic rates are repeatable over a period of months under changing thermal conditions: individual trout exhibited consistent differences in all three metabolic traits across increasing temperatures. Initial among-individual differences in metabolism are thus likely to have significant consequences for fitness-related traits over key periods of their life history.

Item Type:Articles
Keywords:Aerobic scope, consistency, maximum metabolic rate, stability, standard metabolic rate, thermal repeatability.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Anderson, Mr Graeme and Auer, Dr Sonya and Metcalfe, Professor Neil and Salin, Dr Karine
Authors: Auer, S. K., Salin, K., Anderson, G. J., and Metcalfe, N. B.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Comparative Biochemistry and Physiology. Part A: Molecular and Integrative Physiology
Publisher:Elsevier
ISSN:1095-6433
ISSN (Online):1531-4332
Published Online:06 December 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Comparative Biochemistry and Physiology. Part A: Molecular and Integrative Physiology 217:1-6
Publisher Policy:Reproduced under a Creative Commons License

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