Glen Sargeant (Former Employee)
Science and Products
Filter Total Items: 17
Chronic wasting disease—Research by the U.S. Geological Survey and partners Chronic wasting disease—Research by the U.S. Geological Survey and partners
Introduction Chronic wasting disease (CWD) is the only transmissible spongiform encephalopathy, a class of invariably fatal neurodegenerative mammalian diseases associated with a misfolded cellular prion protein found in wild free-ranging animals. Because it has a long incubation period, affected animals in Cervidae (the deer family; referred to as “cervids”) may not show signs of...
Authors
M. Camille Hopkins, Christina M. Carlson, Paul C. Cross, Christopher J. Johnson, Bryan J. Richards, Robin E. Russell, Michael D. Samuel, Glen A. Sargeant, Daniel P. Walsh, W. David Walter
Ecotypic variation in population dynamics of reintroduced bighorn sheep Ecotypic variation in population dynamics of reintroduced bighorn sheep
Selection of bighorn sheep (Ovis canadensis) for translocation historically has been motivated by preservation of subspecific purity rather than by adaptation of source stocks to similar environments. Our objective was to estimate cause‐specific, annual, and age‐specific mortality of introduced bighorn sheep that originated at low elevations in southern British Columbia, Canada (BC...
Authors
Vernon C. Bleich, Glen A. Sargeant, Brett P. Wiedmann
Timing of spring surveys for midcontinent sandhill cranes Timing of spring surveys for midcontinent sandhill cranes
The U.S. Fish and Wildlife Service has used spring aerial surveys to estimate numbers of migrating sandhill cranes (Grus canadensis) staging in the Platte River Valley of Nebraska, USA. Resulting estimates index the abundance of the midcontinent sandhill crane population and inform harvest management decisions. However, annual changes in the index have exceeded biologically plausible...
Authors
Aaron T. Pearse, Gary L. Krapu, David A. Brandt, Glen A. Sargeant
Use of water developments by female elk at Theodore Roosevelt National Park, North Dakota Use of water developments by female elk at Theodore Roosevelt National Park, North Dakota
Development of water sources for wildlife is a widespread management practice with a long history; however, needs of wildlife and availability of water depend on myriad interacting factors that vary among species and localities. Benefits are therefore situational, establishing a need for evaluation of water use in varied settings. We used global-positioning-system (GPS) collars and time...
Authors
Glen A. Sargeant, Michael W. Oehler, Chad L. Sexton
Ecotypic variation in recruitment of reintroduced bighorn sheep: implications for translocation Ecotypic variation in recruitment of reintroduced bighorn sheep: implications for translocation
European settlement led to extirpation of native Audubon's bighorn sheep (formerly Ovis canadensis auduboni) from North Dakota during the early 20th century. The North Dakota Game and Fish Department subsequently introduced California bighorn sheep (formerly O. c. californiana) that were indigenous to the Williams Lake region of British Columbia, Canada, and Rocky Mountain bighorn sheep...
Authors
Brett P. Wiedmann, Glen A. Sargeant
Determinants of mallard and gadwall nesting on constructed islands in North Dakota Determinants of mallard and gadwall nesting on constructed islands in North Dakota
Constructed islands with adequate nesting cover provide secure nesting sites for ducks because islands restrict access by mammalian predators. These islands are costly to construct and should be placed in areas that ensure the greatest use by nesting ducks. We studied mallard (Anas platyrhynchos) and gadwall (A. strepera) nesting on constructed islands in North Dakota in 1996 (n = 20)...
Authors
Terry L. Shaffer, Ann L. Dahl, Ronald E. Reynolds, Kathy L. Baer, Michael A. Johnson, Glen A. Sargeant
Science and Products
Filter Total Items: 17
Chronic wasting disease—Research by the U.S. Geological Survey and partners Chronic wasting disease—Research by the U.S. Geological Survey and partners
Introduction Chronic wasting disease (CWD) is the only transmissible spongiform encephalopathy, a class of invariably fatal neurodegenerative mammalian diseases associated with a misfolded cellular prion protein found in wild free-ranging animals. Because it has a long incubation period, affected animals in Cervidae (the deer family; referred to as “cervids”) may not show signs of...
Authors
M. Camille Hopkins, Christina M. Carlson, Paul C. Cross, Christopher J. Johnson, Bryan J. Richards, Robin E. Russell, Michael D. Samuel, Glen A. Sargeant, Daniel P. Walsh, W. David Walter
Ecotypic variation in population dynamics of reintroduced bighorn sheep Ecotypic variation in population dynamics of reintroduced bighorn sheep
Selection of bighorn sheep (Ovis canadensis) for translocation historically has been motivated by preservation of subspecific purity rather than by adaptation of source stocks to similar environments. Our objective was to estimate cause‐specific, annual, and age‐specific mortality of introduced bighorn sheep that originated at low elevations in southern British Columbia, Canada (BC...
Authors
Vernon C. Bleich, Glen A. Sargeant, Brett P. Wiedmann
Timing of spring surveys for midcontinent sandhill cranes Timing of spring surveys for midcontinent sandhill cranes
The U.S. Fish and Wildlife Service has used spring aerial surveys to estimate numbers of migrating sandhill cranes (Grus canadensis) staging in the Platte River Valley of Nebraska, USA. Resulting estimates index the abundance of the midcontinent sandhill crane population and inform harvest management decisions. However, annual changes in the index have exceeded biologically plausible...
Authors
Aaron T. Pearse, Gary L. Krapu, David A. Brandt, Glen A. Sargeant
Use of water developments by female elk at Theodore Roosevelt National Park, North Dakota Use of water developments by female elk at Theodore Roosevelt National Park, North Dakota
Development of water sources for wildlife is a widespread management practice with a long history; however, needs of wildlife and availability of water depend on myriad interacting factors that vary among species and localities. Benefits are therefore situational, establishing a need for evaluation of water use in varied settings. We used global-positioning-system (GPS) collars and time...
Authors
Glen A. Sargeant, Michael W. Oehler, Chad L. Sexton
Ecotypic variation in recruitment of reintroduced bighorn sheep: implications for translocation Ecotypic variation in recruitment of reintroduced bighorn sheep: implications for translocation
European settlement led to extirpation of native Audubon's bighorn sheep (formerly Ovis canadensis auduboni) from North Dakota during the early 20th century. The North Dakota Game and Fish Department subsequently introduced California bighorn sheep (formerly O. c. californiana) that were indigenous to the Williams Lake region of British Columbia, Canada, and Rocky Mountain bighorn sheep...
Authors
Brett P. Wiedmann, Glen A. Sargeant
Determinants of mallard and gadwall nesting on constructed islands in North Dakota Determinants of mallard and gadwall nesting on constructed islands in North Dakota
Constructed islands with adequate nesting cover provide secure nesting sites for ducks because islands restrict access by mammalian predators. These islands are costly to construct and should be placed in areas that ensure the greatest use by nesting ducks. We studied mallard (Anas platyrhynchos) and gadwall (A. strepera) nesting on constructed islands in North Dakota in 1996 (n = 20)...
Authors
Terry L. Shaffer, Ann L. Dahl, Ronald E. Reynolds, Kathy L. Baer, Michael A. Johnson, Glen A. Sargeant