Aerobic scope measurements of fishes in an era of climate change: respirometry, relevance and recommendations
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It is the intention of this paper to encourage transparency and accuracy in future studies that measure the aerobic metabolism of fishes, and to highlight the fundamental issues with assuming broad relevance of the OCLTT hypothesis.Abstract:
Measurements of aerobic scope [the difference between minimum and maximum oxygen consumption rate (![Graphic][1] and ![Graphic][2] , respectively)] are increasing in prevalence as a tool to address questions relating to fish ecology and the effects of climate change. However, there are underlying issues regarding the array of methods used to measure aerobic scope across studies and species. In an attempt to enhance quality control before the diversity of issues becomes too great to remedy, this paper outlines common techniques and pitfalls associated with measurements of ![Graphic][3] , ![Graphic][4] and aerobic scope across species and under different experimental conditions. Additionally, we provide a brief critique of the oxygen- and capacity-limited thermal tolerance (OCLTT) hypothesis, a concept that is intricately dependent on aerobic scope measurements and is spreading wildly throughout the literature despite little evidence for its general applicability. It is the intention of this paper to encourage transparency and accuracy in future studies that measure the aerobic metabolism of fishes, and to highlight the fundamental issues with assuming broad relevance of the OCLTT hypothesis.
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Citations
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Energetic savings and cardiovascular dynamics of a marine euryhaline fish (Myoxocephalus scorpius) in reduced salinity
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References
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The Respiratory Metabolism and Swimming Performance of Young Sockeye Salmon
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Climate change affects marine fishes through the oxygen limitation of thermal tolerance.
Hans-Otto Pörtner,Rainer Knust +1 more
TL;DR: It is shown in the eelpout, Zoarces viviparus, a bioindicator fish species for environmental monitoring from North and Baltic Seas, that thermally limited oxygen delivery closely matches environmental temperatures beyond which growth performance and abundance decrease, which will be the first process to cause extinction or relocation to cooler waters.
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