Physiological and behavioural responses to seasonal changes in environmental temperature in the Australian spiny crayfish Euastacus sulcatus.

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Katrin LoweR S Wilson

Abstract

The strategies used by ectotherms to minimise the detrimental effects of suboptimal thermal environments on physiological performance are often related to whether they inhabit a terrestrial or aquatic environment. Most terrestrial ectotherms use thermoregulatory strategies to maintain body temperature within an optimal range, while many aquatic ectotherms utilise thermal acclimation to maintain performance over varying seasonal temperatures. This study aimed to elucidate the relative contributions of acclimation and behavioural thermoregulation to maintaining whole-animal performance over varying seasonal temperatures in the semi-terrestrial Lamington spiny crayfish (Euastacus sulcatus). Crayfish activity and surface temperatures were determined by means of radio tracking and behavioural observations. Field studies demonstrated that E. sulcatus is exposed to stable daily temperatures, varying only between seasons from 10 degrees C in late winter to over 20 degrees C in summer. Also, terrestrial behaviour corresponded to a small portion of crayfish time (1.13%), much lower than predicted, indicating that E. sulcatus has limited opportunity for behavioural thermoregulation. We also tested the effect of acclimation to either 10 or...Continue Reading

References

Nov 5, 1999·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·R S Wilson, C E Franklin
May 3, 2000·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·R S WilsonI A Johnston
Sep 21, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·R S Wilson, C E Franklin
Aug 11, 2001·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·F Seebacher, G C Grigg
Sep 18, 2003·Physiological and Biochemical Zoology : PBZ·Shyril O'Steen, Albert F Bennett
Jul 22, 2005·Journal of Evolutionary Biology·W Gabriel
Mar 24, 2006·Physiological and Biochemical Zoology : PBZ·Michael J AngillettaRobbie S Wilson
Feb 8, 2007·Proceedings. Biological Sciences·William CurranAlan Johnston
Feb 22, 2007·Proceedings. Biological Sciences·Robbie S WilsonIan A Johnston
Sep 18, 2007·The American Naturalist·Robbie S WilsonFrank Seebacher
Aug 19, 2008·The American Naturalist·R B Huey, D Berrigan
Sep 1, 2009·The Journal of Experimental Biology·Frank Seebacher
May 1, 1998·Oecologia·Chloe S Schäuble, Gordon C Grigg

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