Seasonal changes in the behaviour and respiration physiology of the freshwater duck mussel, Anodonta anatina.

Lurman, Glenn; Walter, Johanna; Hoppeler, Hans-Heinrich (2014). Seasonal changes in the behaviour and respiration physiology of the freshwater duck mussel, Anodonta anatina. Journal of Experimental Biology, 217(Pt 2), pp. 235-243. Company of Biologists 10.1242/jeb.093450

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For low-energy organisms such as bivalves, the costs of thermal compensation of biological rates (synonymous with acclimation or acclimatization) may be higher than the benefits. We therefore conducted two experiments to examine the effect of seasonal temperature changes on behaviour and oxygen consumption. In the first experiment, we examined the effects of seasonal temperature changes on the freshwater bivalve Anodonta anatina, taking measurements each month for a year at the corresponding temperature for that time of year. There was no evidence for compensation of burrowing valve closure duration or frequency, or locomotory speed. In the second experiment, we compared A. anatina at summer and winter temperatures (24 and 4°C, respectively) and found no evidence for compensation of the burrowing rate, valve closure duration or frequency, or oxygen consumption rates during burrowing, immediately after valve closure or at rest. Within the experimental limits of this study, the evidence suggests that thermal compensation of biological rates is not a strategy employed by A. anatina. We argue that this is due to either a lack of evolutionary pressure to acclimatize, or evolutionary pressure to not acclimatize. Firstly, there is little incentive to increase metabolic rate to enhance predatory ability given that these are filter feeders. Secondly, maintained low energetic demand, enhanced at winter temperatures, is essential for predator avoidance, i.e. valve closure. Thus, we suggest that the costs of acclimatization outweigh the benefits in A. anatina.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Anatomy
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Anatomy > Functional Anatomy

UniBE Contributor:

Lurman, Glenn and Hoppeler, Hans-Heinrich

Subjects:

500 Science > 590 Animals (Zoology)

ISSN:

0022-0949

Publisher:

Company of Biologists

Language:

English

Submitter:

Glenn Lurman

Date Deposited:

26 Sep 2014 16:13

Last Modified:

25 Nov 2015 11:28

Publisher DOI:

10.1242/jeb.093450

PubMed ID:

24072801

Uncontrolled Keywords:

Bivalve, Locomotion, Oxygen consumption, Thermal acclimation, Unionid, Valve closure

BORIS DOI:

10.7892/boris.46880

URI:

https://boris.unibe.ch/id/eprint/46880

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