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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
Source PublicationBEHAVIORAL ECOLOGY
Volume9Issue:6Pages:622-635
SubtypeArticle
AbstractBenefits 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.
KeywordBlack-lipped Pika China Dispersal Inbreeding Mate Competition Ochotona Curzoniae Philopatry Plateau Pika Resource Competition Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Subject Area动物学
WOS KeywordCOLUMBIAN GROUND-SQUIRRELS ; INBREEDING AVOIDANCE ; GENE FLOW ; NATURAL-POPULATIONS ; MATING SYSTEMS ; EVOLUTION ; MAMMALS ; ANIMALS ; BIRDS ; VERTEBRATES
Indexed BySCI
Language英语
WOS Research AreaBehavioral Sciences ; Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Zoology
WOS SubjectBehavioral Sciences ; Biology ; Ecology ; Zoology
WOS IDWOS:000078631200012
Citation statistics
Cited Times:53[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1439
Collection中国科学院西北高原生物研究所
Affiliation1.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
Recommended Citation
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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