Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions

Autor: Felix Christopher Mark, Guy Claireaux, Kristina Lore Kunz, Hans-Otto Pörtner, Rainer Knust
Přispěvatelé: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Universität Bremen, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
respiratory metabolism
Boreogadus saida
Physiology
Acclimatization
Global Warming
01 natural sciences
thermal tolerance
Hypercapnia
atlantic cod
Climate change
Aerobic scope
biology
Arctic Regions
Temperature
Ocean acidification
Hydrogen-Ion Concentration
RCP8.5
dicentrarchus-labrax
Anaerobic exercise
Research Article
european sea bass
exhaustive exercise
Aquatic Science
Arctic cod
010603 evolutionary biology
rcp8.5
Animal science
Gadids
gadus-morhua l
Animals
Seawater
Ecosystem
14. Life underwater
Molecular Biology
Swimming
Ecology
Evolution
Behavior and Systematics
ACL
010604 marine biology & hydrobiology
metabolic cold adaptation
Carbon Dioxide
biology.organism_classification
Gadiformes
Arctic
13. Climate action
Insect Science
Metabolic rate
Environmental science
Animal Science and Zoology
Basal Metabolism
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
arctic cod
Zdroj: Journal Of Experimental Biology (0022-0949) (Company Biologists Ltd), 2018-11, Vol. 221, N. 21, P. jeb184473 (11p.)
EPIC3The Journal of Experimental Biology, 221(21), pp. jeb184473, ISSN: 0022-0949
Journal of Experimental Biology
Journal of Experimental Biology, 2018, 221 (21), pp.UNSP jeb184473. ⟨10.1242/jeb.184473⟩
Journal of Experimental Biology, The Company of Biologists, 2018, 221 (21), pp.UNSP jeb184473. ⟨10.1242/jeb.184473⟩
The Journal of Experimental Biology
ISSN: 0022-0949
1477-9145
DOI: 10.1242/jeb.184473⟩
Popis: Polar cod (Boreogadus saida) is an important prey species in the Arctic ecosystem, yet its habitat is changing rapidly: climate change, through rising seawater temperatures and CO2 concentrations, is projected to be most pronounced in Arctic waters. This study aimed to investigate the influence of ocean acidification and warming on maximum performance parameters of B. saida as indicators for the species' acclimation capacities under environmental conditions projected for the end of this century. After 4 months at four acclimation temperatures (0, 3, 6, 8°C) each combined with two PCO2 levels (390 and 1170 µatm), aerobic capacities and swimming performance of B. saida were recorded following a Ucrit protocol. At both CO2 levels, standard metabolic rate (SMR) was elevated at the highest acclimation temperature indicating thermal limitations. Maximum metabolic rate (MMR) increased continuously with temperature, suggesting an optimum temperature for aerobic scope for exercise (ASex) at 6°C. Aerobic swimming performance (Ugait) increased with acclimation temperature irrespective of CO2 levels, while critical swimming speed (Ucrit) did not reveal any clear trend with temperature. Hypercapnia evoked an increase in MMR (and thereby ASex). However, swimming performance (both Ugait and Ucrit) was impaired under elevated near-future PCO2 conditions, indicating reduced efficiencies of oxygen turnover. The contribution of anaerobic metabolism to swimming performance was very low overall, and further reduced under hypercapnia. Our results revealed high sensitivities of maximum performance parameters (MMR, Ugait, Ucrit) of B. saida to ocean acidification. Impaired swimming capacity under ocean acidification may reflect reduced future competitive strength of B. saida.
Summary: Polar cod is a key species in the Arctic ecosystem; its swimming capacity decreases under future water conditions, likely reducing its survival.
Databáze: OpenAIRE
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