Foraging investment in a long-lived herbivore and vulnerability to coursing and stalking predators

dc.contributor.authorChristianson, David A.
dc.contributor.authorBecker, Matthew S.
dc.contributor.authorBrennan, Angela
dc.contributor.authorCreel, Scott
dc.contributor.authorDroge, Egil
dc.contributor.authorM'soka, Jassiel
dc.contributor.authorMukula, Teddy
dc.contributor.authorSchuette, Paul
dc.contributor.authorSmit, Daan
dc.contributor.authorWatson, Fred
dc.description.abstractAllocating resources to growth and reproduction requires grazers to invest time in foraging, but foraging promotes dental senescence and constrains expression of proactive antipredator behaviors such as vigilance. We explored the relationship between carnivore prey selection and prey foraging effort using incisors collected from the kills of coursing and stalking carnivores. We predicted that prey investing less effort in foraging would be killed more frequently by coursers, predators that often exploit physical deficiencies. However, such prey could expect delayed dental senescence. We predicted that individuals investing more effort in foraging would be killed more frequently by stalkers, predators that often exploit behavioral vulnerabilities. Further these prey could expect earlier dental senescence. We tested these predictions by comparing variation in age-corrected tooth wear, a proxy of cumulative foraging effort, in adult (3.4-11.9 years) wildebeest killed by coursing and stalking carnivores. Predator type was a strong predictor of age-corrected tooth wear within each gender. We found greater foraging effort and earlier expected dental senescence, equivalent to 2.6 additional years of foraging, in female wildebeest killed by stalkers than in females killed by coursers. However, male wildebeest showed the opposite pattern with the equivalent of 2.4 years of additional tooth wear in males killed by coursers as compared to those killed by stalkers. Sex-specific variation in the effects of foraging effort on vulnerability was unexpected and suggests that behavioral and physical aspects of vulnerability may not be subject to the same selective pressures across genders in multipredator landscapes.en_US
dc.description.sponsorshipWildlife Conservation Network; Painted Dog Conservation Inc.; World-Wide Fund For Nature-Netherlands; Division of Integrative Organismal Systems (1145749); U.S. Department of Stateen_US
dc.identifier.citationChristianson, David, Matthew S. Becker, Angela Brennan, Scott Creel, Egil Droge, Jassiel M'soka, Teddy Mukula, Paul Schuette, Daan Smit, and Fred Watson. "Foraging investment in a long-lived herbivore and vulnerability to coursing and stalking predators." Ecology and evolution 8, no. 20 (October 2018): 10147-10155. DOI:10.1002/ece3.4489.en_US
dc.rightsCC BY: This license lets you distribute, remix, tweak, and build upon this work, even commercially, as long as you credit the original creator for this work. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.en_US
dc.titleForaging investment in a long-lived herbivore and vulnerability to coursing and stalking predatorsen_US
mus.citation.journaltitleEcology and Evolutionen_US
mus.contributor.orcidDroge, Egil|0000-0002-2642-3859en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US


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