Low metabolism in a tropical bat from lowland Panama measured using heart rate telemetry : an unexpected life in the slow lane

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2011
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Journal of Experimental Biology. 2011, 214(21), pp. 3605-3612. ISSN 0022-0949. eISSN 1477-9145. Available under: doi: 10.1242/jeb.056010
Zusammenfassung

Animals must optimize their daily energy budgets, particularly if energy expenditures are as high as they are in flying animals. However, energy budgets of free-ranging tropical animals are poorly known. Newly miniaturized heart rate transmitters allowed to address this in the small, energetically limited, Neotropical bat Molossus molossus. High-resolution 48-hour energy budgets showed that this species significantly lowers its metabolism on a daily basis, even though ambient temperatures remain high. Mean roosting heart rate was 144 beats/min-1, much lower than expected for a 10g bat. Low roosting heart rates combined with short nightly foraging times (37 min night–1) resulted in an estimated energy consumption of 4.08 kJ/day-1, less than 1/4 of the predicted field metabolic rate. Our results indicate that future research may reveal this as a more common pattern than currently assumed in tropical animals, which may have implications in the context of the effect of even small temperature changes on tropical species.

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570 Biowissenschaften, Biologie
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esting metabolic rate, energy expenditure, Molossus, foraging strategy, social foraging, torpor
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ISO 690DECHMANN, Dina K. N., Severin EHRET, Aline GAUB, Bart KRANSTAUBER, Martin WIKELSKI, 2011. Low metabolism in a tropical bat from lowland Panama measured using heart rate telemetry : an unexpected life in the slow lane. In: Journal of Experimental Biology. 2011, 214(21), pp. 3605-3612. ISSN 0022-0949. eISSN 1477-9145. Available under: doi: 10.1242/jeb.056010
BibTex
@article{Dechmann2011-11-01metab-17700,
  year={2011},
  doi={10.1242/jeb.056010},
  title={Low metabolism in a tropical bat from lowland Panama measured using heart rate telemetry : an unexpected life in the slow lane},
  number={21},
  volume={214},
  issn={0022-0949},
  journal={Journal of Experimental Biology},
  pages={3605--3612},
  author={Dechmann, Dina K. N. and Ehret, Severin and Gaub, Aline and Kranstauber, Bart and Wikelski, Martin}
}
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