David Brandt (Former Employee)
Science and Products
Filter Total Items: 24
Opportunistically collected data reveal habitat selection by migrating Whooping Cranes in the U.S. Northern Plains Opportunistically collected data reveal habitat selection by migrating Whooping Cranes in the U.S. Northern Plains
The Whooping Crane (Grus americana) is a federally endangered species in the United States and Canada that relies on wetland, grassland, and cropland habitat during its long migration between wintering grounds in coastal Texas, USA, and breeding sites in Alberta and Northwest Territories, Canada. We combined opportunistic Whooping Crane sightings with landscape data to identify...
Authors
Neal Niemuth, Adam Ryba, Aaron Pearse, Susan Kvas, David Brandt, Brian Wangler, Jane Austin, Martha Carlisle
Delineating and identifying long-term changes in the whooping crane (Grus americana) migration corridor Delineating and identifying long-term changes in the whooping crane (Grus americana) migration corridor
Defining and identifying changes to seasonal ranges of migratory species is required for effective conservation. Historic sightings of migrating whooping cranes (Grus americana) have served as sole source of information to define a migration corridor in the Great Plains of North America (i.e., Canadian Prairies and United States Great Plains) for this endangered species. We updated this...
Authors
Aaron Pearse, Matt Rabbe, Lara Juliusson, Mark Bidwell, Lea Craig-Moore, David Brandt, Wade Harrell
Sandhill crane roost selection, human disturbance, and forage resources Sandhill crane roost selection, human disturbance, and forage resources
Sites used for roosting represent a key habitat requirement for many species of birds because availability and quality of roost sites can influence individual fitness. Birds select roost sites based on numerous factors, requirements, and motivations, and selection of roosts can be dynamic in time and space because of various ecological and environmental influences. For sandhill cranes...
Authors
Aaron Pearse, Gary Krapu, David Brandt
Wintering Sandhill Crane exposure to wind energy development in the central and southern Great Plains, USA Wintering Sandhill Crane exposure to wind energy development in the central and southern Great Plains, USA
Numerous wind energy projects have been constructed in the central and southern Great Plains, USA, the main wintering area for midcontinental Sandhill Cranes (Grus canadensis). In an initial assessment of the potential risks of wind towers to cranes, we estimated spatial overlap, investigated potential avoidance behavior, and determined the habitat associations of cranes. We used data...
Authors
Aaron Pearse, David Brandt, Gary Krapu
Whooping crane stopover site use intensity within the Great Plains Whooping crane stopover site use intensity within the Great Plains
Whooping cranes (Grus americana) of the Aransas-Wood Buffalo population migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration, which are generally referred to as stopover sites. To assist in recovery efforts, initial estimates of stopover site use intensity are...
Authors
Aaron Pearse, David Brandt, Wade Harrell, Kristine Metzger, David Baasch, Trevor Hefley
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 Pearse, Gary Krapu, David A. Brandt, Glen Sargeant
Spring migration ecology of the mid-continent sandhill crane population with an emphasis on use of the Central Platte River Valley, Nebraska Spring migration ecology of the mid-continent sandhill crane population with an emphasis on use of the Central Platte River Valley, Nebraska
We conducted a 10-year study (1998–2007) of the Mid-Continent Population (MCP) of sandhill cranes (Grus canadensis) to identify spring-migration corridors, locations of major stopovers, and migration chronology by crane breeding affiliation (western Alaska–Siberia [WA–S], northern Canada–Nunavut [NC–N], west-central Canada–Alaska [WC–A], and east-central Canada–Minnesota [EC–M]). In the...
Authors
Gary Krapu, David A. Brandt, Paul Kinzel, Aaron Pearse
Geographic distribution of the mid-continent population of sandhill cranes and related management applications Geographic distribution of the mid-continent population of sandhill cranes and related management applications
The Mid-continent Population (MCP) of sandhill cranes (Grus canadensis) is widely hunted in North America and is separated into the Gulf Coast Subpopulation and Western Subpopulation for management purposes. Effective harvest management of the MCP requires detailed knowledge of breeding distribution of subspecies and subpopulations, chronology of their use of fall staging areas and...
Authors
Gary Krapu, David A. Brandt, Kenneth L. Jones, Douglas Johnson
Status of greater sandhill cranes in the midcontinent population Status of greater sandhill cranes in the midcontinent population
No abstract available.
Authors
Gary Krapu, David A. Brandt
Population genetic structure in migratory sandhill cranes and the role of Pleistocene glaciations Population genetic structure in migratory sandhill cranes and the role of Pleistocene glaciations
Previous studies of migratory sandhill cranes (Grus canadensis) have made significant progress explaining evolution of this group at the species scale, but have been unsuccessful in explaining the geographically partitioned variation in morphology seen on the population scale. The objectives of this study were to assess the population structure and gene flow patterns among migratory...
Authors
Kenneth L. Jones, Gary Krapu, David Brandt, Mary Ashley
Factors limiting mallard brood survival in prairie pothole landscapes Factors limiting mallard brood survival in prairie pothole landscapes
In order to estimate mallard (Anas platyrhynchos) production from managed and unmanaged lands, waterfowl biologists need measurable predictors of brood survival. We evaluated effects of percent of seasonal basins holding water (WETSEAS), percent of upland landscape in perennial cover (PERNCOVER), rainfall (RAIN), daily minimum ambient temperature (TMIN), hatch date (HATCHDATE), brood age...
Authors
Gary Krapu, Pamela J. Pietz, David Brandt, Robert Cox
Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region
We examined the relationship between local water conditions (measured as the percent of total area of basins that was covered by water) and clutch size, egg volume, and hatchling mass of Mallards (Anas platyrhynchos) and Gadwalls (A. strepera) on four study sites in the Prairie Pothole Region of North Dakota and Minnesota, 1988-1994. We also examined the relationship between pond density...
Authors
Pamela J. Pietz, Gary Krapu, Deborah Buhl, David Brandt
Science and Products
Filter Total Items: 24
Opportunistically collected data reveal habitat selection by migrating Whooping Cranes in the U.S. Northern Plains Opportunistically collected data reveal habitat selection by migrating Whooping Cranes in the U.S. Northern Plains
The Whooping Crane (Grus americana) is a federally endangered species in the United States and Canada that relies on wetland, grassland, and cropland habitat during its long migration between wintering grounds in coastal Texas, USA, and breeding sites in Alberta and Northwest Territories, Canada. We combined opportunistic Whooping Crane sightings with landscape data to identify...
Authors
Neal Niemuth, Adam Ryba, Aaron Pearse, Susan Kvas, David Brandt, Brian Wangler, Jane Austin, Martha Carlisle
Delineating and identifying long-term changes in the whooping crane (Grus americana) migration corridor Delineating and identifying long-term changes in the whooping crane (Grus americana) migration corridor
Defining and identifying changes to seasonal ranges of migratory species is required for effective conservation. Historic sightings of migrating whooping cranes (Grus americana) have served as sole source of information to define a migration corridor in the Great Plains of North America (i.e., Canadian Prairies and United States Great Plains) for this endangered species. We updated this...
Authors
Aaron Pearse, Matt Rabbe, Lara Juliusson, Mark Bidwell, Lea Craig-Moore, David Brandt, Wade Harrell
Sandhill crane roost selection, human disturbance, and forage resources Sandhill crane roost selection, human disturbance, and forage resources
Sites used for roosting represent a key habitat requirement for many species of birds because availability and quality of roost sites can influence individual fitness. Birds select roost sites based on numerous factors, requirements, and motivations, and selection of roosts can be dynamic in time and space because of various ecological and environmental influences. For sandhill cranes...
Authors
Aaron Pearse, Gary Krapu, David Brandt
Wintering Sandhill Crane exposure to wind energy development in the central and southern Great Plains, USA Wintering Sandhill Crane exposure to wind energy development in the central and southern Great Plains, USA
Numerous wind energy projects have been constructed in the central and southern Great Plains, USA, the main wintering area for midcontinental Sandhill Cranes (Grus canadensis). In an initial assessment of the potential risks of wind towers to cranes, we estimated spatial overlap, investigated potential avoidance behavior, and determined the habitat associations of cranes. We used data...
Authors
Aaron Pearse, David Brandt, Gary Krapu
Whooping crane stopover site use intensity within the Great Plains Whooping crane stopover site use intensity within the Great Plains
Whooping cranes (Grus americana) of the Aransas-Wood Buffalo population migrate twice each year through the Great Plains in North America. Recovery activities for this endangered species include providing adequate places to stop and rest during migration, which are generally referred to as stopover sites. To assist in recovery efforts, initial estimates of stopover site use intensity are...
Authors
Aaron Pearse, David Brandt, Wade Harrell, Kristine Metzger, David Baasch, Trevor Hefley
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 Pearse, Gary Krapu, David A. Brandt, Glen Sargeant
Spring migration ecology of the mid-continent sandhill crane population with an emphasis on use of the Central Platte River Valley, Nebraska Spring migration ecology of the mid-continent sandhill crane population with an emphasis on use of the Central Platte River Valley, Nebraska
We conducted a 10-year study (1998–2007) of the Mid-Continent Population (MCP) of sandhill cranes (Grus canadensis) to identify spring-migration corridors, locations of major stopovers, and migration chronology by crane breeding affiliation (western Alaska–Siberia [WA–S], northern Canada–Nunavut [NC–N], west-central Canada–Alaska [WC–A], and east-central Canada–Minnesota [EC–M]). In the...
Authors
Gary Krapu, David A. Brandt, Paul Kinzel, Aaron Pearse
Geographic distribution of the mid-continent population of sandhill cranes and related management applications Geographic distribution of the mid-continent population of sandhill cranes and related management applications
The Mid-continent Population (MCP) of sandhill cranes (Grus canadensis) is widely hunted in North America and is separated into the Gulf Coast Subpopulation and Western Subpopulation for management purposes. Effective harvest management of the MCP requires detailed knowledge of breeding distribution of subspecies and subpopulations, chronology of their use of fall staging areas and...
Authors
Gary Krapu, David A. Brandt, Kenneth L. Jones, Douglas Johnson
Status of greater sandhill cranes in the midcontinent population Status of greater sandhill cranes in the midcontinent population
No abstract available.
Authors
Gary Krapu, David A. Brandt
Population genetic structure in migratory sandhill cranes and the role of Pleistocene glaciations Population genetic structure in migratory sandhill cranes and the role of Pleistocene glaciations
Previous studies of migratory sandhill cranes (Grus canadensis) have made significant progress explaining evolution of this group at the species scale, but have been unsuccessful in explaining the geographically partitioned variation in morphology seen on the population scale. The objectives of this study were to assess the population structure and gene flow patterns among migratory...
Authors
Kenneth L. Jones, Gary Krapu, David Brandt, Mary Ashley
Factors limiting mallard brood survival in prairie pothole landscapes Factors limiting mallard brood survival in prairie pothole landscapes
In order to estimate mallard (Anas platyrhynchos) production from managed and unmanaged lands, waterfowl biologists need measurable predictors of brood survival. We evaluated effects of percent of seasonal basins holding water (WETSEAS), percent of upland landscape in perennial cover (PERNCOVER), rainfall (RAIN), daily minimum ambient temperature (TMIN), hatch date (HATCHDATE), brood age...
Authors
Gary Krapu, Pamela J. Pietz, David Brandt, Robert Cox
Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region Effects of water conditions on clutch size, egg volume, and hatchling mass of mallards and gadwalls in the Prairie Pothole Region
We examined the relationship between local water conditions (measured as the percent of total area of basins that was covered by water) and clutch size, egg volume, and hatchling mass of Mallards (Anas platyrhynchos) and Gadwalls (A. strepera) on four study sites in the Prairie Pothole Region of North Dakota and Minnesota, 1988-1994. We also examined the relationship between pond density...
Authors
Pamela J. Pietz, Gary Krapu, Deborah Buhl, David Brandt