Social and ecological influences on dispersal and philopatry in the plateau pika (Ochotona curzoniae)

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	Social and ecological influences on dispersal and philopatry in the plateau pika (Ochotona curzoniae)
	Dobson, FS ; Smith, AT ; Gao, WX
	1998-11-01
发表期刊	BEHAVIORAL ECOLOGY
卷号	9 期号:6 页码:622-635
文章类型	Article
摘要	Benefits and costs of dispersal and philopatry of the social plateau pika (Ochotona curzoniae) were studied on the Tibetan plateau for 3 years. Although short-lived, plateau pikas live in cohesive family groups that occupy burrow systems in sedge meadow habitat Most (57.8%) plateau pikas were philopatric, and dispersal movements were extremely restricted. No juvenile females or adult pikas moved more than two family ranges between years; the greatest observed dispersal distances were by two juvenile males that moved five family ranges from the family of their birth. Traversing unfamiliar habitat was not a cost of pika dispersal because most dispersers settled in families that they could easily visit before dispersal. Dispersal movements appeared to result in equalization of density among pika families, an expected result if competition for environmental resources influenced dispersal. Males did not disperse to gain advantages in competition for mates, as evidenced by their moving to families with significantly fewer females. Females, however, moved to families with significantly more males. Males provide abundant paternal care, and significantly more offspring per female survived to become adults from families with more adult males per adult female. Evidence concerning the influence of inbreeding avoidance on natal dispersal was indirect. Some males exhibited natal philopatry; thus some families had opportunity for close inbreeding. Males and females that dispersed had no opposite-sex relatives in their new families. Philopatric pikas may have benefited by remaining in families that exhibited low local densities, and philopatric females might have benefited from social cooperation with relatives.; Benefits and costs of dispersal and philopatry of the social plateau pika (Ochotona curzoniae) were studied on the Tibetan plateau for 3 years. Although short-lived, plateau pikas live in cohesive family groups that occupy burrow systems in sedge meadow habitat Most (57.8%) plateau pikas were philopatric, and dispersal movements were extremely restricted. No juvenile females or adult pikas moved more than two family ranges between years; the greatest observed dispersal distances were by two juvenile males that moved five family ranges from the family of their birth. Traversing unfamiliar habitat was not a cost of pika dispersal because most dispersers settled in families that they could easily visit before dispersal. Dispersal movements appeared to result in equalization of density among pika families, an expected result if competition for environmental resources influenced dispersal. Males did not disperse to gain advantages in competition for mates, as evidenced by their moving to families with significantly fewer females. Females, however, moved to families with significantly more males. Males provide abundant paternal care, and significantly more offspring per female survived to become adults from families with more adult males per adult female. Evidence concerning the influence of inbreeding avoidance on natal dispersal was indirect. Some males exhibited natal philopatry; thus some families had opportunity for close inbreeding. Males and females that dispersed had no opposite-sex relatives in their new families. Philopatric pikas may have benefited by remaining in families that exhibited low local densities, and philopatric females might have benefited from social cooperation with relatives.
关键词	Black-lipped Pika China Dispersal Inbreeding Mate Competition Ochotona Curzoniae Philopatry Plateau Pika Resource Competition Tibetan Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	动物学
关键词[WOS]	COLUMBIAN GROUND-SQUIRRELS ; INBREEDING AVOIDANCE ; GENE FLOW ; NATURAL-POPULATIONS ; MATING SYSTEMS ; EVOLUTION ; MAMMALS ; ANIMALS ; BIRDS ; VERTEBRATES
收录类别	SCI
语种	英语
WOS研究方向	Behavioral Sciences ; Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Zoology
WOS类目	Behavioral Sciences ; Biology ; Ecology ; Zoology
WOS记录号	WOS:000078631200012
引用统计	被引频次：87[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1439
专题	中国科学院西北高原生物研究所
作者单位	1.Auburn Univ, Dept Zool & Wildlife Sci, Auburn, AL 36849 USA 2.Arizona State Univ, Dept Biol, Tempe, AZ 85287 USA 3.Acad Sinica, NW Plateau Inst Biol, Xining 810001, Peoples R China
推荐引用方式 GB/T 7714	Dobson, FS,Smith, AT,Gao, WX. Social and ecological influences on dispersal and philopatry in the plateau pika (Ochotona curzoniae)[J]. BEHAVIORAL ECOLOGY,1998,9(6):622-635.
APA	Dobson, FS,Smith, AT,&Gao, WX.(1998).Social and ecological influences on dispersal and philopatry in the plateau pika (Ochotona curzoniae).BEHAVIORAL ECOLOGY,9(6),622-635.
MLA	Dobson, FS,et al."Social and ecological influences on dispersal and philopatry in the plateau pika (Ochotona curzoniae)".BEHAVIORAL ECOLOGY 9.6(1998):622-635.

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