Aerobic scope fails to explain the detrimental effects on growth resulting from warming and elevated CO2 in Atlantic halibut
Artikel i vetenskaplig tidskrift, 2014
As a consequence of increasing atmospheric CO2, the world's oceans are becoming warmer and more acidic. Whilst the ecological effects of these changes are poorly understood, it has been suggested that fish performance including growth will be reduced mainly as a result of limitations in oxygen transport capacity. Contrary to the predictions given by the oxygen- and capacity-limited thermal tolerance hypothesis, we show that aerobic scope and cardiac performance of Atlantic halibut (Hippoglossus hippoglossus) increase following 14–16 weeks exposure to elevated temperatures and even more so in combination with CO2-acidified seawater. However, the increase does not translate into improved growth, demonstrating that oxygen uptake is not the limiting factor for growth performance at high temperatures. Instead, long-term exposure to CO2-acidified seawater reduces growth at temperatures that are frequently encountered by this species in nature, indicating that elevated atmospheric CO2 levels may have serious implications on fish populations in the future.
Carbon dioxide
Optimal temperature
Ocean acidification
Oxygen and capacity limited thermal tolerance
OCLTT
Oxygen consumption rate
Climate change
Respirometry
Författare
Albin Gräns
Göteborgs universitet
Fredrik Jutfelt
Göteborgs universitet
Erik Sandblom
Göteborgs universitet
Elisabeth Jönsson
Göteborgs universitet
Kerstin Wiklander
Chalmers, Matematiska vetenskaper, Matematisk statistik
Göteborgs universitet
Henrik Seth
Göteborgs universitet
Catharina Olsson
Göteborgs universitet
Samuel Dupont
Göteborgs universitet
Olga Ortega-Martínez
Göteborgs universitet
Ingibjörg Einarsdottir
Göteborgs universitet
Björn Thrandur Björnsson
Göteborgs universitet
Kristina Sundell
Göteborgs universitet
Michael Axelsson
Göteborgs universitet
Journal of Experimental Biology
0022-0949 (ISSN) 1477-9145 (eISSN)
Vol. 217 5 711-717Ämneskategorier
Biologiska vetenskaper
Sannolikhetsteori och statistik
DOI
10.1242/jeb.096743