Anthropogenic resource subsidization across western ecosystems has contributed to widespread incr... more Anthropogenic resource subsidization across western ecosystems has contributed to widespread increases in generalist avian predators, including common ravens (Corvus corax; hereafter, raven). Ravens are adept nest predators and can negatively impact species of conservation concern. Predation effects from ravens are especially concerning for greater sage‐grouse (Centrocercus urophasianus; hereafter, sage‐grouse), which have experienced prolonged population decline. Our objectives were to quantify spatiotemporal patterns in raven density, evaluate sage‐grouse nest success concurrent with fluctuating raven densities, and demonstrate a spatially explicit decision support tool to guide management applications to appropriate conflict areas. We combined ~28,000 raven point count surveys with data from more than 900 sage‐grouse nests between 2009 and 2019 within the Great Basin, USA. We modeled variation in raven density using a Bayesian hierarchical distance sampling approach with environm...
We generated a spatially explicit map of categories of expected occurrence and density associated... more We generated a spatially explicit map of categories of expected occurrence and density associated with predicted concentrations of resident and transient common ravens (Corvus corax; ravens) using the residuals from a generalized linear regression between the occurrence and density parameters. These data support the following publication: Webster, S.C., O'Neil, S.T., Brussee, B.E., Coates, P.S, Jackson, P.J., Tull, J.C., and Delehanty, D.J., In Press. Spatial modeling of common raven density and occurrence helps guide landscape management within Great Basin sagebrush ecosystems. Human-Wildlife Interactions.
Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-H... more Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-Highway Vehicles JOHN C. TULL,1,2 Program in Ecology, Evolution, and Conservation Biology, MS-314, University of Nevada ...
Page 1. THE SOUTHWESTERN NATURALIST 46(1) :81-86 MARCH 2001 USE OF A WILDLIFE CORRIDOR BY DESERT ... more Page 1. THE SOUTHWESTERN NATURALIST 46(1) :81-86 MARCH 2001 USE OF A WILDLIFE CORRIDOR BY DESERT MULE DEER JOHN C. TULL AND PAUL R. KRAUSMAN* 325 Biological Sciences East Building, School ...
Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-H... more Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-Highway Vehicles JOHN C. TULL,1,2 Program in Ecology, Evolution, and Conservation Biology, MS-314, University of Nevada ...
Seed moisture has been shown to influence the rates of seed cache removal by rodents. Although th... more Seed moisture has been shown to influence the rates of seed cache removal by rodents. Although the precise mechanism is not known, this knowledge might prove useful in field applications. We examined whether moistened bait would increase trap success in desert rodent populations. We placed traps 15 m apart in grids within a 500-ha study area and randomly baited traps with either dry or moistened seeds.
... Cheri A. Jones. submittedAugust 27, 2005; Accepted: November 18, 2005. Radiotelemetry has bec... more ... Cheri A. Jones. submittedAugust 27, 2005; Accepted: November 18, 2005. Radiotelemetry has become a standard tool in research regarding movements and habitat use of ungulates. ... Responses of mountain sheep to helicopter surveys. California Fish and Game 76:197–204. ...
Anthropogenic resource subsidization across western ecosystems has contributed to widespread incr... more Anthropogenic resource subsidization across western ecosystems has contributed to widespread increases in generalist avian predators, including common ravens (Corvus corax; hereafter, raven). Ravens are adept nest predators and can negatively impact species of conservation concern. Predation effects from ravens are especially concerning for greater sage‐grouse (Centrocercus urophasianus; hereafter, sage‐grouse), which have experienced prolonged population decline. Our objectives were to quantify spatiotemporal patterns in raven density, evaluate sage‐grouse nest success concurrent with fluctuating raven densities, and demonstrate a spatially explicit decision support tool to guide management applications to appropriate conflict areas. We combined ~28,000 raven point count surveys with data from more than 900 sage‐grouse nests between 2009 and 2019 within the Great Basin, USA. We modeled variation in raven density using a Bayesian hierarchical distance sampling approach with environm...
We generated a spatially explicit map of categories of expected occurrence and density associated... more We generated a spatially explicit map of categories of expected occurrence and density associated with predicted concentrations of resident and transient common ravens (Corvus corax; ravens) using the residuals from a generalized linear regression between the occurrence and density parameters. These data support the following publication: Webster, S.C., O'Neil, S.T., Brussee, B.E., Coates, P.S, Jackson, P.J., Tull, J.C., and Delehanty, D.J., In Press. Spatial modeling of common raven density and occurrence helps guide landscape management within Great Basin sagebrush ecosystems. Human-Wildlife Interactions.
Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-H... more Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-Highway Vehicles JOHN C. TULL,1,2 Program in Ecology, Evolution, and Conservation Biology, MS-314, University of Nevada ...
Page 1. THE SOUTHWESTERN NATURALIST 46(1) :81-86 MARCH 2001 USE OF A WILDLIFE CORRIDOR BY DESERT ... more Page 1. THE SOUTHWESTERN NATURALIST 46(1) :81-86 MARCH 2001 USE OF A WILDLIFE CORRIDOR BY DESERT MULE DEER JOHN C. TULL AND PAUL R. KRAUSMAN* 325 Biological Sciences East Building, School ...
Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-H... more Page 1. Research Article Fluctuating Asymmetry as an Indicator of Environmental Stress From Off-Highway Vehicles JOHN C. TULL,1,2 Program in Ecology, Evolution, and Conservation Biology, MS-314, University of Nevada ...
Seed moisture has been shown to influence the rates of seed cache removal by rodents. Although th... more Seed moisture has been shown to influence the rates of seed cache removal by rodents. Although the precise mechanism is not known, this knowledge might prove useful in field applications. We examined whether moistened bait would increase trap success in desert rodent populations. We placed traps 15 m apart in grids within a 500-ha study area and randomly baited traps with either dry or moistened seeds.
... Cheri A. Jones. submittedAugust 27, 2005; Accepted: November 18, 2005. Radiotelemetry has bec... more ... Cheri A. Jones. submittedAugust 27, 2005; Accepted: November 18, 2005. Radiotelemetry has become a standard tool in research regarding movements and habitat use of ungulates. ... Responses of mountain sheep to helicopter surveys. California Fish and Game 76:197–204. ...
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