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DOI	10.1111/1365-2656.12972
	Foraging mode, relative prey size and diet breadth: A phylogenetically explicit analysis of snake feeding ecology
	Glaudas, Xavier 1; Glennon, Kelsey L.1; Martins, Marcio 2; Luiselli, Luca 3,4; Fearn, Simon 5; Trembath, Dane F.6,7; Jelic, Dusan 8; Alexander, Graham J.1
通讯作者	Glaudas, Xavier
来源期刊	JOURNAL OF ANIMAL ECOLOGY
ISSN	0021-8790
EISSN	1365-2656
出版年	2019
卷号	88 期号:5 页码:757-767
英文摘要	Foraging modes (ambush vs. active foraging) are often correlated with a suite of morphological, physiological, behavioural and ecological traits known as the adaptive syndrome or syndrome hypothesis. In snakes, an ecological correlate often reported in the literature is that ambush-hunting snakes have a higher relative meal size compared to actively foraging snakes which feed on smaller prey items. This large meal versus small meal feeding hypothesis between ambush and active foragers has become a widely accepted paradigm of snake feeding ecology, despite the fact that no rigorous meta-analysis has been conducted to support this generalization. We conducted a phylogenetically explicit meta-analysis, which included ca. 100 species, to test this paradigm of snake feeding ecology. We gathered data on prey size by inducing regurgitation by palpation in free-ranging snakes and by examining the stomach contents of preserved museum specimens. When we found prey, we recorded both snake and prey mass to estimate relative prey mass (prey mass/snake mass). We also reviewed published studies of snake feeding ecology to gather similar information for other species. Ambush and active foragers did not differ in minimum or average meal size but the maximum meal sizes consumed by ambush-foraging snakes were larger than the maximum meal sizes eaten by active foragers. This results in ambush-foraging snakes consuming a significantly wider range of meal sizes, rather than being large meal specialists compared to active foragers. We argue that ambush foragers evolved to be more opportunistic predators because they encounter prey less frequently compared to active foragers. This hypothesis is further supported by the fact that ambush foragers also exhibited marginally wider diet breadths, consuming a broader range of prey types in comparison with active foragers. Our study challenges aspects of the foraging syndrome as it is currently conceived, and our results have important implications for our understanding of how foraging mode has shaped the behaviour and physiology of ambush-foraging snakes.
英文关键词	active foragers Alethinophidia ambush foragers meal size Serpentes sit-and-wait foragers
类型	Article
语种	英语
国家	South Africa ; Brazil ; Italy ; Nigeria ; Australia ; Croatia
收录类别	SCI-E
WOS记录号	WOS:000471342700009
WOS关键词	SIT-AND-WAIT ; METABOLIC-RESPONSE ; DESERT LIZARDS ; SEARCH MODES ; PATTERNS ; PERFORMANCE ; EVOLUTION ; BIRDS ; SPECIALIZATIONS ; CONSEQUENCES
WOS类目	Ecology ; Zoology
WOS研究方向	Environmental Sciences & Ecology ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216661
作者单位	1.Univ Witwatersrand, Sch Anim Plant & Environm Sci, Johannesburg, South Africa; 2.Univ Sao Paulo, Inst Biociencias, Dept Ecol, Sao Paulo, Brazil; 3.IDECC, Rome, Italy; 4.Rivers State Univ Sci & Technol, Dept Appl & Environm Biol, Port Harcourt, Nigeria; 5.Queen Victoria Museum & Art Gallery, Nat Sci, Launceston, Tas, Australia; 6.Museum & Art Gallery Northern Terr, Nat Sci, Terr Vertebrates, Darwin, NT, Australia; 7.Australian Museum, Res Inst, Sydney, NSW, Australia; 8.BIOTA Ltd, Croatian Inst Biodivers, Zagreb, Croatia
推荐引用方式 GB/T 7714	Glaudas, Xavier,Glennon, Kelsey L.,Martins, Marcio,et al. Foraging mode, relative prey size and diet breadth: A phylogenetically explicit analysis of snake feeding ecology[J],2019,88(5):757-767.
APA	Glaudas, Xavier.,Glennon, Kelsey L..,Martins, Marcio.,Luiselli, Luca.,Fearn, Simon.,...&Alexander, Graham J..(2019).Foraging mode, relative prey size and diet breadth: A phylogenetically explicit analysis of snake feeding ecology.JOURNAL OF ANIMAL ECOLOGY,88(5),757-767.
MLA	Glaudas, Xavier,et al."Foraging mode, relative prey size and diet breadth: A phylogenetically explicit analysis of snake feeding ecology".JOURNAL OF ANIMAL ECOLOGY 88.5(2019):757-767.