Recent thermal history influences thermal tolerance in freshwater mussel species (Bivalvia:Unionoida)

Galbraith, Heather S.; Blakeslee, Carrie J.; Lellis, William A.

doi:10.1899/11-025.1

Cited by 60 publications

(71 citation statements)

References 52 publications

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“…However, in a review of temperature tolerance for 50 aquatic organisms, including 16 mollusks, required acclimation periods were typically >96 h (de Vries et al 1998). Recent thermal research with adult freshwater mussels, for which no ASTM standard guideline exists, detected differences in temperature sensitivity between 15 and 25°C acclimation temperatures when mussels were fed and held for 7 d before testing (Galbraith et al 2012). Holding and acclimating early life stages of mussels for longer periods without feeding, as prescribed by ASTM (2006b) guidelines, may substantially increase mortality in acute tests.…”

Section: Discussionmentioning

confidence: 99%

Influence of sediment presence on freshwater mussel thermal tolerance

2014

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Median lethal temperature (LT50) data from water-only exposures with the early life stages of freshwater mussels suggest that some species may be living near their upper thermal tolerances. However, evaluation of thermal sensitivity has never been conducted in sediment. Mussels live most of their lives burrowed in sediment, so understanding the effect of sediment on thermal sensitivity is a necessary step in evaluating the effectiveness of the water-only standard method, on which the regulatory framework for potential thermal criteria currently is based, as a test of thermal sensitivity. We developed a method for testing thermal sensitivity of juvenile mussels in sediment and used the method to assess thermal tolerance of 4 species across a range of temperatures common during summer. Stream beds may provide a thermal refuge in the wild, but we hypothesized that the presence of sediment alone does not alter thermal sensitivity. We also evaluated the effects of 2 temperature acclimation levels (22 and 27°C) and 2 water levels (watered and dewatered treatments). We then compared results from the sediment tests to those conducted using the water-only standard methods. We also conducted water-only LT tests with mussel larvae (glochidia) for comparison with the juvenile life stage. We found few consistent differences in thermal tolerance between sediment and water-only treatments, between acclimation temperatures, between waterlevel treatments, among species, or between juvenile and glochidial life stages (LT50 range = 33.3-37.2°C; mean = 35.6°C), supporting our hypothesis that the presence of sediment alone does not alter thermal sensitivity. The method we developed has potential for evaluating the role of other stressors (e.g., contaminants) in a more natural and complex environment.

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Section: Discussionmentioning

confidence: 99%

Influence of sediment presence on freshwater mussel thermal tolerance

2014

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“…There is a clear demonstrable advantage where short-term exposure to very high or low, but non-lethal temperatures can result in a favourable shift in the upper or lower critical temperature, respectively, while other physiological and performance characteristics remain unchanged (Hoffmann, 1995). One study recently found that acclimation can have an (albeit minimal) affect on the upper critical thermal maximum in North American freshwater mussels, with an increase of 1-2°C following acclimation seen in two of three species tested (Galbraith et al, 2012). With many species living close to their upper thermal limit, a difference of 1-2°C may be the difference between life and death.…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in the behaviour and respiration physiology of the freshwater duck musselAnodonta anatina.

Lurman

Walter

Hoppeler

2013

Journal of Experimental Biology

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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.

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“…Although these phenomena have not been as well explored in aquatic invertebrates, changes are known to occur in mitochondrial structure (Lurman et al, 2010a,b) and the membrane lipid composition (Pernet et al, 2007) as a result of acclimatization. While at the whole animal level, this can result in changes in (scallop) swimming mechanics (Bailey and Johnston, 2005) and recovery duration from swimming (Guderley, 2004a), or the acute thermal tolerance limits in freshwater mussels (Galbraith et al, 2012).…”

Section: Thermal Compensationcompensationmentioning

confidence: 99%