Evaluations of Duck Habitat and Estimation of Duck Population Sizes with a Remote-Sensing-Based System
Acknowledgments
This study was a cooperative effort by research personnel of the Northern Prairie Wildlife Research Center and managers in Regions 3 and 6 of the U.S. Fish and Wildlife Service. Numerous individuals from the waterfowl management districts assisted with pair counts and in the later years with conducting the aerial video missions. In addition, the regions furnished financial support. Mapping of the plots and management of digital files were done by R. Gebhard and H. R. Pywell of the National Wetland Inventory. C. R. Luna assembled landownership data on maps that were then digitized by the National Wetland Inventory. Lab technicians J. Belant, D. Hertel, P. S. Marshall, and H. T. Sklebar photointerpreted video images and maintained data files during development of the remotesensing-based system. In 1990, video interpretation and data management became the responsibilities of the Habitat and Population Evaluation Teams of the U.S. Fish and Wildlife Service in Bismarck, North Dakota, and in Fergus Falls, Minnesota. R. C. Khan-Malek wrote computer programs and assisted with the preparation of figures. H. T. Sklebar processed digital images. D. H. Johnson furnished advice throughout the study and initiated work on pair wetland regressions and on the productivity model that are integral parts of the remote-sensing-based system. J. E. Austin, N. H. Euliss, D. H. Johnson, W. E. Newton, R. T. Reynolds and A. B. Sargeant kindly reviewed earlier drafts of the manuscript.
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