Journal
ECOLOGY
Volume 97, Issue 11, Pages 2910-2916Publisher
WILEY-BLACKWELL
DOI: 10.1002/ecy.1568
Keywords
African wild dog; hunting; Lycaon pictus; predation; temperature
Categories
Funding
- Frankfurt Zoological Society [1112/90]
- National Science Foundation Animal Behavior Program [IOS-1145749]
- National Geographic Society [9864-16]
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [1145749] Funding Source: National Science Foundation
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As global temperatures increase, interactions between species are affected by changes in distribution, abundance and phenology, but also by changes in behavior. The heat dissipation limitation hypothesis suggests that the ability to dissipate heat commonly limits the activity of endotherms, a problem that should be particularly acute for cursorial predators and their prey in equatorial ecosystems. Allometric relationships suggest that heat dissipation should be a stronger constraint for larger species, so that (smaller) predators should be less affected than (larger) prey. We used daton pictus) in five packs oa from 266 complete days of direct observation of African wild dogs (Lycaver a period of 2 yr to test how deviations of temperature from that expected for the time of day affected eight measures of hunting effort and success. We found that higher temperatures disadvantaged the prey of wild dogs more than the dogs themselves, with increased hunting success and shorter pursuits on warmer days. Broadly, our results demonstrate that effects of temperature on behavior can alter interactions between species, exacerbating or offsetting the direct effects of climate change.
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