Thermal physiology of the common eelpout (Zoarces viviparus)

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
M V ZakhartsevRonny Blust

Abstract

We investigated the temperature dependence of some physiological parameters of common eelpout (Zoarces viviparus) from different locations (North Sea, Baltic Sea and Norwegian Sea) on acclimation temperature (3 degrees C and 12 degrees C) and acute temperature variation. The lethal limit of 12 degrees C-acclimated eelpout was determined as the critical thermal maximum [loss of equilibrium (LE) and onset of muscular spasms (OS)] and it was found to be 26.6 degrees C for LE and 28.8 degrees C for OS for all populations. However, these parameters do not have any relevant ecological interpretation. We therefore investigated the effect of gradually increased water temperature on standard metabolic rate (measured as resting oxygen consumption Mo2) and critical oxygen concentration ([O2]c) of eelpouts. Acclimation to low temperature (3 degrees C) resulted in partial compensation of Mo2, paralleled by a decrease of activation energy for Mo2 (from 82 kJ mol(-1) at 12 degrees C to about 50 kJ mol(-1) at 3 degrees C) in North Sea and Baltic Sea eelpouts. At the same time, Norwegian eelpout showed no acclimation of oxygen demand to warm temperature (12 degrees C) at all. The scope for eelpout aerobic metabolism shrank considerably with inc...Continue Reading

Citations

Jun 8, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Hans O PörtnerGeorge Somero
Jan 16, 2016·Journal of Fish Biology·D ChabotA P Farrell
Jan 18, 2007·The FEBS Journal·Peter RuoffHans V Westerhoff
Oct 31, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Peter Vilhelm SkovJohn Fleng Steffensen
Nov 17, 2010·Journal of Fish Biology·H-O Pörtner, M A Peck
Aug 4, 2004·Respiratory Physiology & Neurobiology·H-O PörtnerChristian Bock
Aug 2, 2011·Marine Pollution Bulletin·Jenny E HedmanAnders Bignert
Nov 3, 2017·Frontiers in Zoology·Matthias SchmidtChristian Bock
Aug 5, 2017·The Journal of Experimental Biology·Hans-O PörtnerFelix C Mark
May 31, 2015·The Journal of Experimental Biology·Jeroen BrijsErik Sandblom
Jan 5, 2006·The Journal of Experimental Biology·Katja HeiseHans-O Pörtner

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