DOI: 10.1111/ele.12441
Scopus记录号: 2-s2.0-84931578474
论文题名: Brain size affects female but not male survival under predation threat
作者: Kotrschal A. ; Buechel S.D. ; Zala S.M. ; Corral-Lopez A. ; Penn D.J. ; Kolm N.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2015
卷: 18, 期: 7 起始页码: 646
结束页码: 652
语种: 英语
英文关键词: Crenicichla
; Poecilia reticulata
; Artificial selection
; Brain size
; Guppy
; Pike cichlid
; Predation
; Semi natural
; Survival
Scopus关键词: brain
; cognition
; color
; cyprinid
; female
; predation
; predator
; size
; survival
; Crenicara
; Crenicichla
; Poecilia reticulata
; Vertebrata
; anatomy and histology
; animal
; brain
; female
; male
; organ size
; physiology
; Poecilia
; population dynamics
; predation
; sex difference
; Animals
; Brain
; Female
; Male
; Organ Size
; Poecilia
; Population Dynamics
; Predatory Behavior
; Sex Factors
英文摘要: There is remarkable diversity in brain size among vertebrates, but surprisingly little is known about how ecological species interactions impact the evolution of brain size. Using guppies, artificially selected for large and small brains, we determined how brain size affects survival under predation threat in a naturalistic environment. We cohoused mixed groups of small- and large-brained individuals in six semi-natural streams with their natural predator, the pike cichlid, and monitored survival in weekly censuses over 5 months. We found that large-brained females had 13.5% higher survival compared to small-brained females, whereas the brain size had no discernible effect on male survival. We suggest that large-brained females have a cognitive advantage that allows them to better evade predation, whereas large-brained males are more colourful, which may counteract any potential benefits of brain size. Our study provides the first experimental evidence that trophic interactions can affect the evolution of brain size. © 2015 The Authors Ecology Letters published by CNRS and John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107893
Appears in Collections: 气候减缓与适应
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作者单位: Department of Zoology/Ethology, Stockholm University, Svante Arrhenius väg 18B, Stockholm, Sweden; Department of Integrative Biology and Evolution, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine, Savoyenstraße 1a, Vienna, Austria
Recommended Citation:
Kotrschal A.,Buechel S.D.,Zala S.M.,et al. Brain size affects female but not male survival under predation threat[J]. Ecology Letters,2015-01-01,18(7)