干旱区生态环境知识资源中心(Arid): The truth about cats and dogs: assessment of apex- and mesopredator diets improves with reduced observer uncertainty

Arid

DOI	10.1093/jmammal/gyz040
	The truth about cats and dogs: assessment of apex- and mesopredator diets improves with reduced observer uncertainty
	Wysong, Michael L.1; Tulloch, Ayesha I. T.2; Valentine, Leonie E.1; Hobbs, Richard J.1; Morris, Keith 3; Ritchie, Euan G.4
通讯作者	Wysong, Michael L.
来源期刊	JOURNAL OF MAMMALOGY
ISSN	0022-2372
EISSN	1545-1542
出版年	2019
卷号	100 期号:2 页码:410-422
英文摘要	Dietary (scat) analysis is a key tool for assessing the potential effects of predators on prey and for comparing resource use between predators, information that is crucial for effective wildlife management. However, misidentification of the species from which scats originate could result in inaccurate conclusions regarding predator-prey interactions and their consequences for ecosystems, which may ultimately compromise conservation and management actions. To address this issue, we developed a framework for decision-making in the face of uncertain scat species origin by incorporating field, laboratory, and molecular identification techniques. We used the framework to examine the diets of two predators, a native apex predator (dingo, Canis lupus dingo) and an invasive mesopredator (feral cat, Felis catus), from 696 field-collected scats in the arid zone of Australia. We examined how uncertainty regarding scat species origin changed perceptions of the nature of the relationship between coexisting predators and their prey. The extent of dietary overlap between dingoes and cats varied with the method used to identify scat species origin. Dietary overlap assessed by laboratory identifications was twice as high as when uncertainty in scat species origin was resolved through our decision framework. If uncertainty in scat species origin is not resolved in dietary studies, practitioners and decision-makers relying on this information run the risk of making misinformed conclusions regarding the ecological function of predators (including potential impacts on threatened species), which could have perverse outcomes if the wrong predators are targeted for management. With uncertainty in scat species origin resolved through our decision framework, a low level of dietary overlap between the two predators was demonstrated, and medium-sized mammals most threatened with extinction were shown to be more at risk of impact from feral cat than from dingo depredations.
英文关键词	apex predator Canis lupus dingo critical weight range diet Felis catus intraguild competition invasive species mesopredator scat analysis uncertainty
类型	Article
语种	英语
国家	Australia
收录类别	SCI-E
WOS记录号	WOS:000482136500014
WOS关键词	FERAL CATS ; INVASIVE PREDATORS ; FELIS-CATUS ; PREY ; CARNIVORES ; DINGOES ; FECES ; AUSTRALIA ; MAMMALS ; IDENTIFICATION
WOS类目	Zoology
WOS研究方向	Zoology
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217215
作者单位	1.Univ Western Australia, Sch Biol Sci, Perth, WA 6009, Australia; 2.Australian Natl Univ, Fenner Sch Environm & Soc, ARC Ctr Excellence Environm Decis, Canberra, ACT 2602, Australia; 3.Western Australian Dept Biodivers Conservat & Att, Sci & Conservat Div, Woodvale, WA 6026, Australia; 4.Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Burwood, Vic 3125, Australia
推荐引用方式 GB/T 7714	Wysong, Michael L.,Tulloch, Ayesha I. T.,Valentine, Leonie E.,et al. The truth about cats and dogs: assessment of apex- and mesopredator diets improves with reduced observer uncertainty[J]. University of Western Australia,2019,100(2):410-422.
APA	Wysong, Michael L.,Tulloch, Ayesha I. T.,Valentine, Leonie E.,Hobbs, Richard J.,Morris, Keith,&Ritchie, Euan G..(2019).The truth about cats and dogs: assessment of apex- and mesopredator diets improves with reduced observer uncertainty.JOURNAL OF MAMMALOGY,100(2),410-422.
MLA	Wysong, Michael L.,et al."The truth about cats and dogs: assessment of apex- and mesopredator diets improves with reduced observer uncertainty".JOURNAL OF MAMMALOGY 100.2(2019):410-422.