Gary Krapu, PhD (Former Employee)
Science and Products
Filter Total Items: 105
Mallard brood survival in prairie pothole landscapes Mallard brood survival in prairie pothole landscapes
No abstract available.
Authors
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. 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 L. Krapu, Deborah A. Buhl, David A. Brandt
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 L. Krapu, Pamela J. Pietz, David A. Brandt, Robert R. 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 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 and...
Authors
P.J. Pietz, Gary L. Krapu, D. A. Buhl, D.A. Brandt
Temporal flexibility of reproduction in temperate-breeding dabbling ducks Temporal flexibility of reproduction in temperate-breeding dabbling ducks
I compared nesting intervals during three consecutive years in five species of temperate-nesting dabbling ducks (Mallard [Anas platyrhynchos], Northern Pintail [Anas acuta], Northern Shoveler [Anas clypeata], Blue-winged Teal [Anas discors], Gadwall [Anas strepera]) and assessed whether differences existed in timing of refractoriness. Most nesting by females of all five species ended by...
Authors
Gary L. Krapu
Science and Products
Filter Total Items: 105
Mallard brood survival in prairie pothole landscapes Mallard brood survival in prairie pothole landscapes
No abstract available.
Authors
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. 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 L. Krapu, Deborah A. Buhl, David A. Brandt
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 L. Krapu, Pamela J. Pietz, David A. Brandt, Robert R. 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 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 and...
Authors
P.J. Pietz, Gary L. Krapu, D. A. Buhl, D.A. Brandt
Temporal flexibility of reproduction in temperate-breeding dabbling ducks Temporal flexibility of reproduction in temperate-breeding dabbling ducks
I compared nesting intervals during three consecutive years in five species of temperate-nesting dabbling ducks (Mallard [Anas platyrhynchos], Northern Pintail [Anas acuta], Northern Shoveler [Anas clypeata], Blue-winged Teal [Anas discors], Gadwall [Anas strepera]) and assessed whether differences existed in timing of refractoriness. Most nesting by females of all five species ended by...
Authors
Gary L. Krapu