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13 December 2012 Recent thermal history influences thermal tolerance in freshwater mussel species (Bivalvia:Unionoida)
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Abstract

Understanding species' temperature tolerances in the context of concurrent environmental stressors is critical because thermal regimes of freshwater ecosystems are changing. We evaluated the critical thermal maximum (CTM) of 3 freshwater mussel species (Alasmidonta varicosa, Elliptio complanata, and Strophitus undulatus) acclimated to 2 temperatures (15 and 25°C) and exposed to 2 aeration treatments (aerated vs unaerated) during CTM testing. Responses varied by species, but mussels acclimated to 25°C generally had a higher CTM than mussels acclimated to 15°C. For E. complanata, the effects of acclimation temperature and aeration were interactive, such that CTM was highest at 15°C but only under aerated conditions. Our results indicate that recent thermal history affects thermal tolerance, combinations of environmental stressors may influence thermal tolerance, and such responses vary among species.

Society for Freshwater Science
Heather S Galbraith, Carrie J Blakeslee, and William A Lellis "Recent thermal history influences thermal tolerance in freshwater mussel species (Bivalvia:Unionoida)," Freshwater Science 31(1), 83-92, (13 December 2012). https://doi.org/10.1899/11-025.1
Received: 17 March 2011; Accepted: 1 October 2011; Published: 13 December 2012
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