Gary Krapu, PhD (Former Employee)
Science and Products
Filter Total Items: 105
Changes in agriculture and abundance of snow geese affect carrying capacity of sandhill cranes in Nebraska Changes in agriculture and abundance of snow geese affect carrying capacity of sandhill cranes in Nebraska
The central Platte River valley (CPRV) in Nebraska, USA, is a key spring-staging area for approximately 80 of the midcontinent population of sandhill cranes (Grus canadensis; hereafter cranes). Evidence that staging cranes acquired less lipid reserves during the 1990s compared to the late 1970s and increases in use of the CPRV by snow geese (Chen caerulescens) prompted us to investigate
Authors
A.T. Pearse, Gary L. Krapu, D.A. Brandt, P.J. Kinzel
Feeding ecology of arctic-nesting sandpipers during spring migration through the prairie pothole region Feeding ecology of arctic-nesting sandpipers during spring migration through the prairie pothole region
We evaluated food habits of 4 species of spring-migrant calidrid sandpipers in the Prairie Pothole Region (PPR) of North Dakota. Sandpipers foraged in several wetland classes and fed primarily on aquatic dipterans, mostly larvae, and the midge family Chironomidae was the primary food eaten. Larger sandpiper species foraged in deeper water and took larger larvae than did smaller...
Authors
J.L. Eldridge, Gary L. Krapu, Douglas H. Johnson
Status of greater sandhill cranes in the midcontinent population Status of greater sandhill cranes in the midcontinent population
No abstract available.
Authors
Gary L. Krapu, David A. Brandt
Mallard brood movements, wetland use, and duckling survival during and following a prairie drought Mallard brood movements, wetland use, and duckling survival during and following a prairie drought
We used radiotelemetry to study mallard (Anas platyrhynchos) brood movements, wetland use, and duckling survival during a major drought (1988-1992) and during the first 2 years of the subsequent wet period (1993-1994) at 4 51-km2 sites in prairie pothole landscapes in eastern North Dakota, USA. About two-thirds of 69 radiomarked mallard broods initiated moves from the nest to water...
Authors
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. Cox
Fat dynamics of arctic-nesting sandpipers during spring in mid-continental North America Fat dynamics of arctic-nesting sandpipers during spring in mid-continental North America
We measured fresh body mass, total body fat, and fat-free dry mass (FFDM) of three species of Arctic-nesting calidrid sandpipers (Baird's Sandpiper [Calidris bairdii], hereafter “BASA”; Semipalmated Sandpiper [C. pusilla], hereafter “SESA”; and White-rumped Sandpiper [C. fuscicollis], hereafter “WRSA”) during spring stopovers in the Prairie Pothole Region (PPR) of North Dakota, and...
Authors
Gary L. Krapu, J.L. Eldridge, C. L. Gratto-Trevor, D. A. Buhl
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 A. Brandt, Mary V. Ashley
Science and Products
Filter Total Items: 105
Changes in agriculture and abundance of snow geese affect carrying capacity of sandhill cranes in Nebraska Changes in agriculture and abundance of snow geese affect carrying capacity of sandhill cranes in Nebraska
The central Platte River valley (CPRV) in Nebraska, USA, is a key spring-staging area for approximately 80 of the midcontinent population of sandhill cranes (Grus canadensis; hereafter cranes). Evidence that staging cranes acquired less lipid reserves during the 1990s compared to the late 1970s and increases in use of the CPRV by snow geese (Chen caerulescens) prompted us to investigate
Authors
A.T. Pearse, Gary L. Krapu, D.A. Brandt, P.J. Kinzel
Feeding ecology of arctic-nesting sandpipers during spring migration through the prairie pothole region Feeding ecology of arctic-nesting sandpipers during spring migration through the prairie pothole region
We evaluated food habits of 4 species of spring-migrant calidrid sandpipers in the Prairie Pothole Region (PPR) of North Dakota. Sandpipers foraged in several wetland classes and fed primarily on aquatic dipterans, mostly larvae, and the midge family Chironomidae was the primary food eaten. Larger sandpiper species foraged in deeper water and took larger larvae than did smaller...
Authors
J.L. Eldridge, Gary L. Krapu, Douglas H. Johnson
Status of greater sandhill cranes in the midcontinent population Status of greater sandhill cranes in the midcontinent population
No abstract available.
Authors
Gary L. Krapu, David A. Brandt
Mallard brood movements, wetland use, and duckling survival during and following a prairie drought Mallard brood movements, wetland use, and duckling survival during and following a prairie drought
We used radiotelemetry to study mallard (Anas platyrhynchos) brood movements, wetland use, and duckling survival during a major drought (1988-1992) and during the first 2 years of the subsequent wet period (1993-1994) at 4 51-km2 sites in prairie pothole landscapes in eastern North Dakota, USA. About two-thirds of 69 radiomarked mallard broods initiated moves from the nest to water...
Authors
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. Cox
Fat dynamics of arctic-nesting sandpipers during spring in mid-continental North America Fat dynamics of arctic-nesting sandpipers during spring in mid-continental North America
We measured fresh body mass, total body fat, and fat-free dry mass (FFDM) of three species of Arctic-nesting calidrid sandpipers (Baird's Sandpiper [Calidris bairdii], hereafter “BASA”; Semipalmated Sandpiper [C. pusilla], hereafter “SESA”; and White-rumped Sandpiper [C. fuscicollis], hereafter “WRSA”) during spring stopovers in the Prairie Pothole Region (PPR) of North Dakota, and...
Authors
Gary L. Krapu, J.L. Eldridge, C. L. Gratto-Trevor, D. A. Buhl
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 A. Brandt, Mary V. Ashley