00000cam 2200000za 4500 9.855446 CaOODSP 20241203113642 cr ||||||||||| 180418s1974 onca|||#o f00| 0 eng d CaOODSP eng eng fre n-cn--- CW69-1/20E-PDF Development of a simulation model of mallard duck populations [electronic resource] / by Carl J. Walters ... [et al.]. Ottawa : Canadian Wildlife Service, c1974. 35 p. : ill. Occasional paper ; no. 20 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "This paper describes an attempt to develop a comprehensive computer model of Mallard Duck populations in North America. The model considers major population processes and spatial distribution patterns in an attempt to predict long term population trends. Though predictions of the model have been questionable, it has provided a valuable means to help identify critical data needs for future work"--Abstract. Includes abstract in French. gccst Birds gccst Population gccst Modelling Walters, Carl J., 1944- Canada. Environment Canada. Canadian Wildlife Service. Occasional paper (Canadian Wildlife Service) no. 20 (CaOODSP)9.504780 PDF 2.01 MB https://publications.gc.ca/collections/collection_2018/eccc/CW69-1-20-eng.pdf