00000nam 2200000za 4500 9.857188 CaOODSP 20241203113643 cr ||||||||||| 180530s1992 bcca o f00| 0 eng d CaOODSP eng eng fre n-cn-yk CW69-5/159E-PDF Nixon, W. Waterfowl surveys along the Alaska Highway southern Yukon, spring and summer 1989 and suggestions for an annual trend survey [electronic resource] / Wendy A.C. Nixon, Joyce Majiski, Jim Hawkings. Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 1992. 32 p. : ill. Technical report series ; no. 159 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 20). "Multiple surveys on 20 selected wetlands were conducted in May 1989 to determine their suitability for waterfowl population trends and to document waterfowl productivity in that year. Mean population estimates were highly variable between surveys and among waterbodies. Scaup species, American widgeon and Mallards were the most abundant species. Surveys of this magnitude and frequency are not sensitive enough to be relied upon for trend surveys. Increasing the number of wetlands surveyed or increasing the number of replicates will lower the confidence limits substantially. The logistical and financial constraints of intensifying the surveys are discussed"--Abstract. Includes abstract in French. gccst Birds gccst Surveys Waterfowl Majiski, Joyce J. Hawkings, J. Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. Technical report series (Canadian Wildlife Service) no. 159. (CaOODSP)9.504438 PDF 1.42 MB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-159-eng.pdf