干旱区生态环境知识资源中心(Arid): Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species

Arid

DOI	10.1002/ecs2.2895
	Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species
	Shields, Timothy 1; Currylow, Andrea 2,3; Hanley, Brenda 4,6; Boland, Stephen 5; Boarman, William 1; Vaughn, Mercy 5
通讯作者	Currylow, Andrea
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2019
卷号	10 期号:10
英文摘要	Wildlife managers face complex problems in attempting to achieve contemporary conservation goals while maintaining ecosystem function. Anthropogenically altered environments can subsidize certain species, causing them to become overabundant and straining the remaining natural system. Such is the case with the widespread avian generalist and subsidized predator, the common raven (Corvus corax). Ravens depredate nests and prey on small animals, with locally focused high impacts to the ecosystem during rearing of their nestlings. Limiting predator abundance reduces the spatially concentrated predation rates by eliminating nestling provisioning needs. We investigated avenues to limit the reproduction of common raven using customized theoretical and practical tools. Specifically, we developed an online interactive tool, a mathematical model, that calculates the predator's population growth rate under any given proportion of reproductive management. This quantitative tool models an assessment of ravens in a defined area and results in the degree to which raven fitness would need to be reduced to control their populations. To implement the model's results in a field-practical way and manage reproduction with minimal disturbance, we developed novel technology, a Remote Fluid Application System (RFAS). The RFAS applies the egg addling technique of egg oiling to high (usually out of reach) nesting situations. We tested these tools in the Mojave Desert, CA, where the raven is a heavily human-subsidized predator. We mounted our RFAS on telescoping poles and unmanned aerial vehicles (UAVs; drones) and found that we were able to aerially, and precisely, spray-oil eggs high in trees or cliffs/rock faces, halting 100% (n = 46) of raven nesting events. With these tools, we enable managers to calculate the intensity of, and the ability to carry out, egg addling needed to stem or halt predator population growth. We conclude that the combination of the interactive software (StallPOPd Interactive Tool, ; publicly available at ) and the RFAS is the most effective wildlife management strategy to date for the offset or control of undesirable population growth in high-nesting avian predators.
英文关键词	common raven conservation tool Corvus desert tortoise drone egg oiling Gopherus predator control unmanned aerial vehicles wildlife management
类型	Article
语种	英语
国家	USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000493528200008
WOS关键词	MOJAVE DESERT TORTOISE ; GOPHERUS-AGASSIZII ; COMMON RAVENS ; POPULATIONS ; BIRD
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310143
作者单位	1.Hardshell Labs Inc, Haines, AK 99827 USA; 2.ACEcol Res & Consulting, Atascadero, CA 93422 USA; 3.Univ Southern Calif, Integrat & Evolutionary Biol, Los Angeles, CA 90089 USA; 4.Univ Idaho, Moscow, ID 83843 USA; 5.Sundance Biol Inc, Paso Robles, CA 93446 USA; 6.Cornell Univ, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Shields, Timothy,Currylow, Andrea,Hanley, Brenda,et al. Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species[J],2019,10(10).
APA	Shields, Timothy,Currylow, Andrea,Hanley, Brenda,Boland, Stephen,Boarman, William,&Vaughn, Mercy.(2019).Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species.ECOSPHERE,10(10).
MLA	Shields, Timothy,et al."Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species".ECOSPHERE 10.10(2019).