干旱区生态环境知识资源中心(Arid): Risk pump in Gerbillus pyramidum: quality of poor habitats increases with more conspecifics

Arid

DOI	10.1080/03949370.2018.1521873
	Risk pump in Gerbillus pyramidum: quality of poor habitats increases with more conspecifics
	Menezes, Jorge F. S.; Kotler, Burt P.; Dixon, Austin K.
通讯作者	Menezes, Jorge F. S.
来源期刊	ETHOLOGY ECOLOGY & EVOLUTION
ISSN	0394-9370
EISSN	1828-7131
出版年	2019
卷号	31 期号:2 页码:140-154
英文摘要	Reducing predation risk is fundamental to many animals. Among those, social animals are studied for one type of anti-predator defense. They aggregate in certain habitats to dilute risk, share vigilance, defend each other, and reduce their chances of being attacked. However, this tendency is not necessarily unique: solitary animals may also benefit from the presence of conspecifics. Thus, we hypothesize that even solitary animals should aggregate whenever there is safety in numbers. Additionally, this tendency to aggregate should create a risk pump, a positive feedback in aggregation because more individuals bring more safety, which brings more individuals. We also analyzed if they will aggregate in resource-rich or resource-poor environment. Aggregation in a richer and thus crowded environment implies risk pump is a stronger mechanism than competition. Aggregation in a resource-poor environment indicates the presence of risk pump, but one weaker than competition. To test the existence and direction of a risk pump in non-social animals, we compared quality between patches at different distances and population densities in three experiments. We used the most abundant gerbils of the Negev Desert: Gerbillus andersoni and G. pyramidum. Results supported the hypothesis of aggregation in the resource-poor patch for both species.
英文关键词	giving-up density Israel foraging risk dilution rodent aggregation
类型	Article
语种	英语
国家	Israel
收录类别	SCI-E
WOS记录号	WOS:000457702100003
WOS关键词	OPTIMAL FORAGERS ; PREDATION RISK ; COEXISTENCE ; PREFERENCE ; MECHANISMS ; VIGILANCE ; SELECTION ; GAMES ; TIME
WOS类目	Behavioral Sciences ; Zoology
WOS研究方向	Behavioral Sciences ; Zoology
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/2XILL650/215567
作者单位	Ben Gurion Univ Negev, BIDR, SIDEER, Marco & Louise Mitrani Dept Desert Ecol, IL-8499000 Midreshet Ben Gurion, Israel
推荐引用方式 GB/T 7714	Menezes, Jorge F. S.,Kotler, Burt P.,Dixon, Austin K.. Risk pump in Gerbillus pyramidum: quality of poor habitats increases with more conspecifics[J]. Ben-Gurion University of the Negev,2019,31(2):140-154.
APA	Menezes, Jorge F. S.,Kotler, Burt P.,&Dixon, Austin K..(2019).Risk pump in Gerbillus pyramidum: quality of poor habitats increases with more conspecifics.ETHOLOGY ECOLOGY & EVOLUTION,31(2),140-154.
MLA	Menezes, Jorge F. S.,et al."Risk pump in Gerbillus pyramidum: quality of poor habitats increases with more conspecifics".ETHOLOGY ECOLOGY & EVOLUTION 31.2(2019):140-154.