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Full-Text Articles in Social and Behavioral Sciences
An Incident Of Fenthion Mosquito Control And Subsequent Avian Mortality, Robert Seabloom, Gary Pearson, Lewis Oring, James Reilly
An Incident Of Fenthion Mosquito Control And Subsequent Avian Mortality, Robert Seabloom, Gary Pearson, Lewis Oring, James Reilly
USGS Northern Prairie Wildlife Research Center
Mass mortality among migratory birds at Grand Forks, North Dakota, was attributed to a mosquito control operation employing the insecticide fenthion. The factors involved may have included the toxicity of the pesticide for birds, the method of application and coincidence with the peak of the spring warbler migration.
Ecological Distribution Of Breeding Waterfowl Populations In North Dakota, Robert E. Stewart, Harold A. Kantrud
Ecological Distribution Of Breeding Waterfowl Populations In North Dakota, Robert E. Stewart, Harold A. Kantrud
USGS Northern Prairie Wildlife Research Center
The distribution of breeding waterfowl populations on various wetland habitat types was investigated in North Dakota during 1967-69. Data were obtained by stratified random sampling techniques. The total wetland acreage in North Dakota was estimated to be about 3.2 million acres. Natural basin wetlands comprised about 77 percent of the acreage and 91 percent of the number of wetlands in the state and were utilized by about 76 percent of the state's breeding duck population. Among the four biotic regions of the state, numerical and areal composition of wetlands varied considerably. Natural basin wetlands varied from a low of about …
Racial Composition Of Migrant Populations Of Sandhill Cranes In The Northern Plains States, Douglas H. Johnson, Robert E. Stewart
Racial Composition Of Migrant Populations Of Sandhill Cranes In The Northern Plains States, Douglas H. Johnson, Robert E. Stewart
USGS Northern Prairie Wildlife Research Center
During recent years, there has been increasing pressure to expand hunting seasons on Sandhill Cranes (Grus canadensis) in the northern plains states. Hunters desire to take advantage of the opportunity presented by the sizable flocks of this large bird in this area. Prior to passage of the Migratory Bird Treaty Act in 1918, the Sandhill Crane was hunted and considered to have high sporting and eating qualities. In addition, complaints have been received from farmers regarding grain crop depredations by cranes. It has been suggested (Boeker et al., 1961:16) that flocks of cranes would be more widely dispersed …