Gary Krapu, PhD
Dr. Gary Krapu is a Wildlife Biologist (Emeritus) at the USGS Northern Prairie Wildlife Research Center in Jamestown, North Dakota.
Science and Products
Filter Total Items: 105
Population dynamics of breeding waterfowl
No abstract available.
Authors
D. H. Johnson, J. D. Nichols, M.D. Schwartz
Breeding population inventories and measures of recruitment
In this chapter we review the techniques used to measure two important parameters of waterfowl populations, size of breeding population and recruitment. If waterfowl are to be managed toward goals defined in terms of population sizes such as those in the recently signed North American Waterfowl Management Plan (U.S. Fish and Wildlife Service [USFWS] and Canadian Wildlife Service [CWS] 1986), there
Authors
L.M. Cowardin, R.J. Blohm
Population dynamics of breeding waterfowl
No abstract available.
Authors
D. H. Johnson, J. D. Nichols, M.D. Schwartz
Orphaned mallard brood travels alone from nest to water
No abstract available.
Authors
G.L. Krapu, C.P. Dwyer, C.R. Luna
Habitat use, survival, and causes of mortality among mallard broods hatched near the James River in North Dakota
Habitat use and survival by nine mallard (Anas platyrhynchos) broods from nests on the James River floodplain and adjacent drift plain were monitored during summer 1987. Radio-marked broods were relocated an average of 22% of the time in the river channel, 22% in oxbow ponds, 43% in a large sewage lagoon complex, and 13% in basin wetlands. Four of the six broods hatched on the floodplain stayed pr
Authors
G.L. Krapu, C.R. Luna
Conditioning of sandhill cranes during fall migration
Body mass of adult female and male sandhill cranes (Grus canadensis) increased an average of 17 and 20%, respectively, from early September to late October on staging areas in central North Dakota and varied by year. Increases in body mass averaged 550 and 681 g among female and male G. c. canadensis, respectively, and 616 and 836 g among female and male G. c. rowani. Adult and juvenile G. c. rowa
Authors
Gary L. Krapu, Douglas H. Johnson
Prairie basin wetlands of the Dakotas: a community profile
This description of prairie basin wetlands of the Dakotas is part of a series of community profiles on ecologically important wetlands of national significance. The shallow wetlands of the Dakotas form the bulk of the portion of the Prairie Pothole Region lying within the United States. This region is famous as the producer of at least half of North America's waterfowl and an unknown, but large, p
Authors
H.A. Kantrud, G.L. Krapu, G.A. Swanson
Workshop summary: Habitat loss and its effect on waterfowl
No abstract available.
Authors
Robert E. Stewart, Gary Krapu, Bruce Conant, H. Franklin Percival, David L. Hall
Workshop summary: nutrition, condition, and ecophysiology
No abstract available.
Authors
K. J. Reinecke, C.D. Ankney, G.L. Krapu, R. Owen
Science and Products
Filter Total Items: 105
Population dynamics of breeding waterfowl
No abstract available.
Authors
D. H. Johnson, J. D. Nichols, M.D. Schwartz
Breeding population inventories and measures of recruitment
In this chapter we review the techniques used to measure two important parameters of waterfowl populations, size of breeding population and recruitment. If waterfowl are to be managed toward goals defined in terms of population sizes such as those in the recently signed North American Waterfowl Management Plan (U.S. Fish and Wildlife Service [USFWS] and Canadian Wildlife Service [CWS] 1986), there
Authors
L.M. Cowardin, R.J. Blohm
Population dynamics of breeding waterfowl
No abstract available.
Authors
D. H. Johnson, J. D. Nichols, M.D. Schwartz
Orphaned mallard brood travels alone from nest to water
No abstract available.
Authors
G.L. Krapu, C.P. Dwyer, C.R. Luna
Habitat use, survival, and causes of mortality among mallard broods hatched near the James River in North Dakota
Habitat use and survival by nine mallard (Anas platyrhynchos) broods from nests on the James River floodplain and adjacent drift plain were monitored during summer 1987. Radio-marked broods were relocated an average of 22% of the time in the river channel, 22% in oxbow ponds, 43% in a large sewage lagoon complex, and 13% in basin wetlands. Four of the six broods hatched on the floodplain stayed pr
Authors
G.L. Krapu, C.R. Luna
Conditioning of sandhill cranes during fall migration
Body mass of adult female and male sandhill cranes (Grus canadensis) increased an average of 17 and 20%, respectively, from early September to late October on staging areas in central North Dakota and varied by year. Increases in body mass averaged 550 and 681 g among female and male G. c. canadensis, respectively, and 616 and 836 g among female and male G. c. rowani. Adult and juvenile G. c. rowa
Authors
Gary L. Krapu, Douglas H. Johnson
Prairie basin wetlands of the Dakotas: a community profile
This description of prairie basin wetlands of the Dakotas is part of a series of community profiles on ecologically important wetlands of national significance. The shallow wetlands of the Dakotas form the bulk of the portion of the Prairie Pothole Region lying within the United States. This region is famous as the producer of at least half of North America's waterfowl and an unknown, but large, p
Authors
H.A. Kantrud, G.L. Krapu, G.A. Swanson
Workshop summary: Habitat loss and its effect on waterfowl
No abstract available.
Authors
Robert E. Stewart, Gary Krapu, Bruce Conant, H. Franklin Percival, David L. Hall
Workshop summary: nutrition, condition, and ecophysiology
No abstract available.
Authors
K. J. Reinecke, C.D. Ankney, G.L. Krapu, R. Owen