Gary Krapu, PhD (Former Employee)
Science and Products
Filter Total Items: 105
The occurrence of mycoplasmas in selected wild North American waterfowl The occurrence of mycoplasmas in selected wild North American waterfowl
We determined the prevalence of mycoplasma infection in breeding mallard (Anas platyrhynchos) and canvasback (Aythya valisineria) hens and their broods from the central United States (1988 to 1990); and wintering American black duck (Anas rubripes) and mallard hens from the eastern United States (1990 to 1993). Mycoplasmas were isolated by culturing tracheal swabs from 656 live birds and...
Authors
Diana R. Goldberg, M.D. Samuel, C. B. Thomas, P. Sharp, Gary L. Krapu, J.R. Robb, K.P. Kenow, C. E. Korschgen, W.H. Chipley, M.J. Conroy, S.H. Kleven
Modified transmitter attachment method for adult ducks Modified transmitter attachment method for adult ducks
The value of radio telemetry for waterfowl research depends on the availability of suitable methods of attaching transmitters. In previous studies, external transmitters attached to adult Mallards (Anas platyrhynchos) with sutures and glue did not stay on birds reliably. In an attempt to improve transmitter retention, a method of attachment was tested in which 4-g transmitters were...
Authors
P.J. Pietz, D.A. Brandt, Gary L. Krapu, D. A. Buhl
Communal roosting and foraging behavior of staging sandhill cranes Communal roosting and foraging behavior of staging sandhill cranes
Each spring more than 300,000 Sandhill Cranes (Grus canadensis) roost communally at night in river channels in the Platte River Valley of Nebraska and disperse at dawn to forage in agricultural fields. Cranes with central roosts had activity ranges double the size of those with peripheral roosts; 42% of the birds changed activity ranges prior to the onset of migration. Minimum daily...
Authors
D. W. Sparling, Gary L. Krapu
Effects of predator exclosure design on duck brood movements Effects of predator exclosure design on duck brood movements
No abstract available.
Authors
P.J. Pietz, Gary L. Krapu
The year ducks nested into autumn The year ducks nested into autumn
Abstract has not been submitted
Authors
Gary L. Krapu
Effects of harness transmitters on behavior and reproduction of wild mallards Effects of harness transmitters on behavior and reproduction of wild mallards
Radio telemetry has been an important research tool in waterfowl studies for >20 years, yet little effort has been made to evaluate potential effects of transmitters on the birds that carry them. As part of a 4-year mallard (Anas platyrhynchos) study in the prairie pothole region of North Dakota and Minnesota, we compared radio-marked and unmarked female mallards in terms of percent time...
Authors
Pamela J. Pietz, Gary L. Krapu, Raymond J. Greenwood, John T. Lokemoen
Science and Products
Filter Total Items: 105
The occurrence of mycoplasmas in selected wild North American waterfowl The occurrence of mycoplasmas in selected wild North American waterfowl
We determined the prevalence of mycoplasma infection in breeding mallard (Anas platyrhynchos) and canvasback (Aythya valisineria) hens and their broods from the central United States (1988 to 1990); and wintering American black duck (Anas rubripes) and mallard hens from the eastern United States (1990 to 1993). Mycoplasmas were isolated by culturing tracheal swabs from 656 live birds and...
Authors
Diana R. Goldberg, M.D. Samuel, C. B. Thomas, P. Sharp, Gary L. Krapu, J.R. Robb, K.P. Kenow, C. E. Korschgen, W.H. Chipley, M.J. Conroy, S.H. Kleven
Modified transmitter attachment method for adult ducks Modified transmitter attachment method for adult ducks
The value of radio telemetry for waterfowl research depends on the availability of suitable methods of attaching transmitters. In previous studies, external transmitters attached to adult Mallards (Anas platyrhynchos) with sutures and glue did not stay on birds reliably. In an attempt to improve transmitter retention, a method of attachment was tested in which 4-g transmitters were...
Authors
P.J. Pietz, D.A. Brandt, Gary L. Krapu, D. A. Buhl
Communal roosting and foraging behavior of staging sandhill cranes Communal roosting and foraging behavior of staging sandhill cranes
Each spring more than 300,000 Sandhill Cranes (Grus canadensis) roost communally at night in river channels in the Platte River Valley of Nebraska and disperse at dawn to forage in agricultural fields. Cranes with central roosts had activity ranges double the size of those with peripheral roosts; 42% of the birds changed activity ranges prior to the onset of migration. Minimum daily...
Authors
D. W. Sparling, Gary L. Krapu
Effects of predator exclosure design on duck brood movements Effects of predator exclosure design on duck brood movements
No abstract available.
Authors
P.J. Pietz, Gary L. Krapu
The year ducks nested into autumn The year ducks nested into autumn
Abstract has not been submitted
Authors
Gary L. Krapu
Effects of harness transmitters on behavior and reproduction of wild mallards Effects of harness transmitters on behavior and reproduction of wild mallards
Radio telemetry has been an important research tool in waterfowl studies for >20 years, yet little effort has been made to evaluate potential effects of transmitters on the birds that carry them. As part of a 4-year mallard (Anas platyrhynchos) study in the prairie pothole region of North Dakota and Minnesota, we compared radio-marked and unmarked female mallards in terms of percent time...
Authors
Pamela J. Pietz, Gary L. Krapu, Raymond J. Greenwood, John T. Lokemoen