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Ecological influences and morphological correlates of resting and maximal metabolic rates across teleost fish species

Killen, Shaun S., Glazier, Douglas S., Rezende, Enrico L., Clark, Timothy D., Atkinson, David, Willener, Astrid S. T. and Halsey, Lewis G. 2016, Ecological influences and morphological correlates of resting and maximal metabolic rates across teleost fish species, American naturalist, vol. 187, no. 5, pp. 592-606, doi: 10.1086/685893.

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Title Ecological influences and morphological correlates of resting and maximal metabolic rates across teleost fish species
Author(s) Killen, Shaun S.
Glazier, Douglas S.
Rezende, Enrico L.
Clark, Timothy D.
Atkinson, David
Willener, Astrid S. T.
Halsey, Lewis G.
Journal name American naturalist
Volume number 187
Issue number 5
Start page 592
End page 606
Total pages 15
Publisher University of Chicago Press
Place of publication Chicago, Ill.
Publication date 2016-05
ISSN 1537-5323
Keyword(s) aerobic scope
energetics
metabolic scaling
physiological ecology
teleost fish
Animal Fins
Animals
Basal Metabolism
Ecosystem
Energy Metabolism
Fishes
Gills
Muscle Proteins
Phylogeny
Swimming
Summary Rates of aerobic metabolism vary considerably across evolutionary lineages, but little is known about the proximate and ultimate factors that generate and maintain this variability. Using data for 131 teleost fish species, we performed a large-scale phylogenetic comparative analysis of how interspecific variation in resting metabolic rates (RMRs) and maximum metabolic rates (MMRs) is related to several ecological and morphological variables. Mass- and temperature-adjusted RMR and MMR are highly correlated along a continuum spanning a 30- to 40-fold range. Phylogenetic generalized least squares models suggest that RMR and MMR are higher in pelagic species and that species with higher trophic levels exhibit elevated MMR. This variation is mirrored at various levels of structural organization: gill surface area, muscle protein content, and caudal fin aspect ratio (a proxy for activity) are positively related with aerobic capacity. Muscle protein content and caudal fin aspect ratio are also positively correlated with RMR. Hypoxia-tolerant lineages fall at the lower end of the metabolic continuum. Different ecological lifestyles are associated with contrasting levels of aerobic capacity, possibly reflecting the interplay between selection for increased locomotor performance on one hand and tolerance to low resource availability, particularly oxygen, on the other. These results support the aerobic capacity model of the evolution of endothermy, suggesting elevated body temperatures evolved as correlated responses to selection for high activity levels.
Language eng
DOI 10.1086/685893
Field of Research 070403 Fisheries Management
070401 Aquaculture
060299 Ecology not elsewhere classified
06 Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, University of Chicago
Persistent URL http://hdl.handle.net/10536/DRO/DU:30105043

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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