DOI: 10.1111/ele.12606
Scopus记录号: 2-s2.0-84964727697
论文题名: Differential foraging success across a light level spectrum explains the maintenance and spatial structure of colour morphs in a polymorphic bird
作者: Tate G.J. ; Bishop J.M. ; Amar A.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2016
卷: 19, 期: 6 起始页码: 679
结束页码: 686
语种: 英语
英文关键词: Accipiter melanoleucus
; Ambient light
; Background matching
; Black sparrowhawk
; Colour polymorphism
; Crypsis
; Disruptive selection
; Predator-prey interaction
; Raptor
Scopus关键词: Accipiter melanoleucus
; Aves
; Raptores
; animal
; appetite
; genetic polymorphism
; light
; male
; phenotype
; physiology
; pigmentation
; raptor
; South Africa
; spatial analysis
; Animals
; Appetitive Behavior
; Light
; Male
; Phenotype
; Pigmentation
; Polymorphism, Genetic
; Raptors
; South Africa
; Spatial Analysis
英文摘要: Detectability of different colour morphs under varying light conditions has been proposed as an important driver in the maintenance of colour polymorphism via disruptive selection. To date, no studies have tested whether different morphs have selective advantages under differing light conditions. We tested this hypothesis in the black sparrowhawk, a polymorphic raptor exhibiting a discrete white and dark morph, and found that prey provisioning rates differ between the morphs depending on light condition. Dark morphs delivered more prey in lower light conditions, while white morphs provided more prey in brighter conditions. We found support for the role of breeding season light level in explaining the clinal pattern of variation in morph ratio across the species range throughout South Africa. Our results provide the first empirical evidence supporting the hypothesis that polymorphism in a species, and the spatial structuring of morphs across its distribution, may be driven by differential selective advantage via improved crypsis, under varying light conditions. © 2016 John Wiley & Sons Ltd/CNRS. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107761
Appears in Collections: 气候减缓与适应
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作者单位: Percy FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, Department of Biological Sciences, University of Cape Town, Rondebosch, Cape Town, South Africa
Recommended Citation:
Tate G.J.,Bishop J.M.,Amar A.. Differential foraging success across a light level spectrum explains the maintenance and spatial structure of colour morphs in a polymorphic bird[J]. Ecology Letters,2016-01-01,19(6)