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 5 711-717

Ämneskategorier

Biologiska vetenskaper

Sannolikhetsteori och statistik

DOI

10.1242/jeb.096743