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Group size effects on foraging and vigilance in migratory Tibetan antelope
Lian, Xinming; Zhang, Tongzuo; Cao, Yifan; Su, Jianping; Thirgood, Simon
2007-11-01
Source PublicationBEHAVIOURAL PROCESSES
Volume76Issue:3Pages:192-197
SubtypeArticle
AbstractLarge group sizes have been hypothesized to decrease predation risk and increase food competition. We investigated group size effects on vigilance and foraging behaviour during the migratory period in female Tibetan antelope Pantholops hodgsoni, in the Kekexili Nature Reserve of Qinghai Province, China. During June to August, adult female antelope and yearling females gather in large migratory groups and cross the Qinghai-Tibet highway to calving grounds within the Nature Reserve and return to Qumalai county after calving. Large groups of antelope aggregate in the migratory corridor where they compete for limited food resources and attract the attention of mammalian and avian predators and scavengers. We restricted our sampling to groups of less than 30 antelopes and thus limit our inference accordingly. Focal-animal sampling was used to record the behaviour of the free-ranging antelope except for those with lambs. Tibetan antelope spent more time foraging in larger groups but frequency of foraging bouts was not affected by group size. Conversely, the time spent vigilant and frequency of vigilance bouts decreased with increased group size. We suggest that these results are best explained by competition for food and risk of predation. (C) 2007 Elsevier B.V. All rights reserved.; Large group sizes have been hypothesized to decrease predation risk and increase food competition. We investigated group size effects on vigilance and foraging behaviour during the migratory period in female Tibetan antelope Pantholops hodgsoni, in the Kekexili Nature Reserve of Qinghai Province, China. During June to August, adult female antelope and yearling females gather in large migratory groups and cross the Qinghai-Tibet highway to calving grounds within the Nature Reserve and return to Qumalai county after calving. Large groups of antelope aggregate in the migratory corridor where they compete for limited food resources and attract the attention of mammalian and avian predators and scavengers. We restricted our sampling to groups of less than 30 antelopes and thus limit our inference accordingly. Focal-animal sampling was used to record the behaviour of the free-ranging antelope except for those with lambs. Tibetan antelope spent more time foraging in larger groups but frequency of foraging bouts was not affected by group size. Conversely, the time spent vigilant and frequency of vigilance bouts decreased with increased group size. We suggest that these results are best explained by competition for food and risk of predation. (C) 2007 Elsevier B.V. All rights reserved.
KeywordForaging Group Size Kekexili Nature Reserve Tibetan Antelope Vigilance
WOS HeadingsSocial Sciences ; Science & Technology ; Life Sciences & Biomedicine
Subject Area动物学
WOS KeywordPANTHOLOPS-HODGSONI ; BEHAVIOR ; PREDATION ; RISK ; TIME ; MECHANISMS ; VEGETATION ; SEARCH ; SHEEP ; COMPETITION
Indexed BySCI ; SSCI
Language英语
WOS Research AreaPsychology ; Behavioral Sciences ; Zoology
WOS SubjectPsychology, Biological ; Behavioral Sciences ; Zoology
WOS IDWOS:000251119300002
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/1248
Collection中国科学院西北高原生物研究所
Affiliation1.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland
Recommended Citation
GB/T 7714
Lian, Xinming,Zhang, Tongzuo,Cao, Yifan,et al. Group size effects on foraging and vigilance in migratory Tibetan antelope[J]. BEHAVIOURAL PROCESSES,2007,76(3):192-197.
APA Lian, Xinming,Zhang, Tongzuo,Cao, Yifan,Su, Jianping,&Thirgood, Simon.(2007).Group size effects on foraging and vigilance in migratory Tibetan antelope.BEHAVIOURAL PROCESSES,76(3),192-197.
MLA Lian, Xinming,et al."Group size effects on foraging and vigilance in migratory Tibetan antelope".BEHAVIOURAL PROCESSES 76.3(2007):192-197.
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