00000cam 2200000za 4500 9.855432 CaOODSP 20241203113642 cr ||||||||||| 180418s1973 onca|||#o f00| 0 eng d CaOODSP eng eng fre n-cn-ab CW69-1/17E-PDF Nieman, D. J. Waterfowl populations on the Peace-Athabasca Delta, 1969 and 1970 [electronic resource] / by D.J. Nieman and H.J. Dirschl. Ottawa : Canadian Wildlife Service, 1973. 26 p. : ill. Occasional paper ; no. 17 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Water levels are the prime factor in the distribution and habitat utilization of waterfowl in the Peace-Athabasca Delta. A progressive and cumulative water level decline has resulted in the deterioration and consequent reduced use of much waterfowl breeding, moulting and faIl staging habitat"--Abstract. Includes abstract in French. gccst Rivers gccst Birds gccst Population distribution Dirschl, Herman J. Canada. Environment Canada. Canadian Wildlife Service. Occasional paper (Canadian Wildlife Service) no. 17 (CaOODSP)9.504780 PDF 4.11 MB https://publications.gc.ca/collections/collection_2018/eccc/CW69-1-17-eng.pdf