Arid
Foraging efficiency in the face of predation risk: a comparative study of desert rodents
Emerson, Sara E.1; Kotler, Burt P.2; Sargunaraj, Franklin2
通讯作者Emerson, Sara E.
来源期刊EVOLUTIONARY ECOLOGY RESEARCH
ISSN1522-0613
EISSN1937-3791
出版年2018
卷号19期号:1页码:61-70
英文摘要

Question: What is the adaptive significance of the heteromyid cheek pouch?


Organisms: Two heteromyid rodents (Merriam’s kangaroo rat, Dipodomys merriami, and desert pocket mouse, Chaetodipus penicillatus) from the Mojave Desert, and two gerbils (greater Egyptian gerbil, Gerbillus pyramidum, and Allenby’s gerbil, Gerbillus andersoni allenbyi) from the Negev Desert, Israel.


Site: An outdoor vivarium on the Sede Boqer campus of Ben-Gurion University of the Negev, Israel.


Methods: We measured foraging time in seed trays for heteromyids and gerbils. We also measured the number of trips to food patches, and giving-up densities (GUDs, the amount of seed left behind when an individual left a seed tray).


Predictions: We expected cheek pouches to confer improved heteromyid foraging efficiency by reducing the number of trips between food patches and caching sites. We further expected that, compared with the other species, kangaroo rats would be less inhibited by barn owls, by moonlight, and by risky microhabitats.


Results: The two heteromyid species harvested more food per trip than the two gerbil species. Kangaroo rats had lower GUDs than any other species, particularly in risky microhabitats and at the full moon. Harvest rate curves for greater Egyptian gerbils and kangaroo rats indicated that these two larger bodied species were more vigilant than the two smaller bodied species.


Conclusion: Adaptations such as body size and the external cheek pouch appear to allow kangaroo rats to manage risk and harvest food more effectively than smaller and non-heteromyid rodents.


英文关键词foraging efficiency gerbil giving-up density heteromyid
类型Article
语种英语
国家USA ; Israel
收录类别SCI-E
WOS记录号WOS:000424630200005
WOS关键词PATCH USE ; HETEROMYID RODENTS ; GERBILS ; ADAPTATIONS ; COMPETITION ; PREFERENCE ; MORPHOLOGY ; MOONLIGHT ; VIGILANCE ; RATES
WOS类目Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS研究方向Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
来源机构Ben-Gurion University of the Negev
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209233
作者单位1.CSU Stanislaus, Dept Biol, 1 Univ Circle, Turlock, CA 95382 USA;
2.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, Sede Boqer, Israel
推荐引用方式
GB/T 7714
Emerson, Sara E.,Kotler, Burt P.,Sargunaraj, Franklin. Foraging efficiency in the face of predation risk: a comparative study of desert rodents[J]. Ben-Gurion University of the Negev,2018,19(1):61-70.
APA Emerson, Sara E.,Kotler, Burt P.,&Sargunaraj, Franklin.(2018).Foraging efficiency in the face of predation risk: a comparative study of desert rodents.EVOLUTIONARY ECOLOGY RESEARCH,19(1),61-70.
MLA Emerson, Sara E.,et al."Foraging efficiency in the face of predation risk: a comparative study of desert rodents".EVOLUTIONARY ECOLOGY RESEARCH 19.1(2018):61-70.
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