Respiration rates in Bithynia tentaculata (L.) (Gastropoda: Bithyniidae) in response to acclimation temperature and acute temperature change

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Abstract

The aerobic metabolic rate of the freshwater prosobranch Bithynia tentaculata (L.) was measured as the rate of oxygen consumption by groups of snails acclimated to temperatures of 12°C, 18°C and 24°C. Responses to acute temperature alteration were also monitored. The results revealed that metabolic rate is essentially independent of ambient temperature: no differences were found among the respiration rates of the three differently acclimated groups. Metabolic effects of acutely elevated temperature were usually compensated in a highly efficient manner, resulting in low Q10 values between 1.08 and 2.24. However, the 12°C-acclimated snails remained inactive at temperatures above 18°C, which is a typical stress response in B. tentaculata. The same behaviour occurred in 24°C-acclimated snails at experimental temperatures below 24°C. In both cases no active respiration rates could be determined. When the 18°C-acclimated group was exposed to an experimental temperature of 12°C, their oxygen consumption rate declined with a Q10 of 5.53. In relation to previous findings on life-cycle strategy, as well as nutritional and reproductive physiology in B. tentaculata, the present results are discussed in the context of a seasonally controlled metabolism, reflecting the seasonally varying physiological needs of this species. © The Author 2005. Published by Oxford University Studies, all rights reserved.

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CITATION STYLE

APA

Hahn, T. (2005). Respiration rates in Bithynia tentaculata (L.) (Gastropoda: Bithyniidae) in response to acclimation temperature and acute temperature change. Journal of Molluscan Studies, 71(2), 127–131. https://doi.org/10.1093/mollus/eyi015

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