The efficiency of bounding vampires

Hermanson, John W., Dzal, Yvonne, Orr, Terry, York, Julia, Czenze, Zenon, & Parsons, Stuart (2016) The efficiency of bounding vampires. In Annual Meeting of the Society-for-Integrative-and-Comparative-Biology, 3-7 January 2016, Portland, Oregon.

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Abstract

Vampire bats, Desmodus rotundus, must maximize their feeding cycle of one blood meal per day by being efficient in the stalking and acquisition of their food. Riskin and Hermanson documented the running gait of the common vampire bat and observed they were efficient at running speeds, using longer stride lengths and thus decreased stride frequency. We obtained preliminary data on gait maintained for up to 10 minutes on a moving treadmill belt at speeds ranging from 0.23 to 0.74 m/s, which spanned a range from walking to running gaits. Bats tended to transition between gaits at about 0.40 m/s. Fourteen bats were studied and included four that were able to walk or run for 10 minutes. There was no significant change in either stride duration or frequency associated with an increase in speed. We estimated O2 consumption and CO2 production both before and 5 minutes after exercise, and found that O2 consumption increased 1 minute and 5 minutes after exercise. CO2 levels increased significantly 1 minute after exercise, but tended back towards pre-exercise level 5 minutes after exercise. Two bats were tested for blood O2, CO2 and pH levels. Interestingly, pH levels fell from 7.3 to about 7.0, indicating lactate accumulation.

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ID Code: 95142
Item Type: Conference Item (Presentation)
Refereed: Yes
Keywords: Desmodus rotundus, gate, Oxygen consumption, Carbon dioxide, Blood Ph
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > PHYSIOLOGY (060600) > Comparative Physiology (060604)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ZOOLOGY (060800) > Animal Physiological Ecology (060806)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 26 Apr 2016 03:54
Last Modified: 26 Apr 2016 03:54

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