FN Archimer Export Format
PT J
TI The role of mechanistic physiology in investigating impacts of global warming on fishes
BT 
AF LEFEVRE, Sjannie
   WANG, Tobias
   MCKENZIE, David
AS 1:1;2:2;3:3;
FF 1:;2:;3:;
C1 Univ Oslo, Dept Biosci, Sect Physiol & Cell Biol, N-0316 Oslo, Norway.
   Aarhus Univ, Dept Biol Zoophysiol, DK-8000 Aarhus C, Denmark.
   Univ Montpellier, IFREMER, CNRS, Marine Biodivers Exploitat & Conservat MARBEC,IRD, F-34000 Montpellier, France.
C2 UNIV OSLO, NORWAY
   UNIV AARHUS, DENMARK
   UNIV MONTPELLIER, FRANCE
UM MARBEC
IN WOS Cotutelle UMR
   copubli-europe
IF 3.308
TC 45
UR https://archimer.ifremer.fr/doc/00686/79797/82596.pdf
   https://archimer.ifremer.fr/doc/00686/79797/82597.pdf
LA English
DT Article
DE ;Critical thermal maximum;CTmax Metabolism;Scope for activity;Temperature tolerance
AB Warming of aquatic environments as a result of climate change is already having measurable impacts on fishes, manifested as changes in phenology, range shifts and reductions in body size. Understanding the physiological mechanisms underlying these seemingly universal patterns is crucial if we are to reliably predict the fate of fish populations with future warming. This includes an understanding of mechanisms for acute thermal tolerance, as extreme heatwaves may be a major driver of observed effects. The hypothesis of gill oxygen limitation (GOL) is claimed to explain asymptotic fish growth, and why some fish species are decreasing in size with warming; but its underlying assumptions conflict with established knowledge and direct mechanistic evidence is lacking. The hypothesis of oxygen- and capacity-limited thermal tolerance (OCLTT) has stimulated a wave of research into the role of oxygen supply capacity and thermal performance curves for aerobic scope, but results vary greatly between species, indicating that it is unlikely to be a universal mechanism. As thermal performance curves remain important for incorporating physiological tolerance into models, we discuss potentially fruitful alternatives to aerobic scope, notably specific dynamic action and growth rate. We consider the limitations of estimating acute thermal tolerance by a single rapid measure whose mechanism of action is not known. We emphasise the continued importance of experimental physiology, particularly in advancing our understanding of underlying mechanisms, but also the challenge of making this knowledge relevant to the more complex reality. 
PY 2021
PD FEB
SO Journal Of Experimental Biology
SN 0022-0949
PU Company Biologists Ltd
VL 224
UT 000623021700012
DI 10.1242/jeb.238840
ID 79797
ER

EF