00000nam 2200000za 4500 9.849935 CaOODSP 20241203113641 cr ||||||||||| 180112s1984 oncd||||o f000 0 eng d CaOODSP eng n-cnp-- n-cn-nt n-us--- CW69-9/142E-PDF Cooch, F. G. Changes in the net export of mallard from western Canada and the contiguous US, 1972-82 [electronic resource] / by F.G. Cooch and H. Boyd. [Ottawa] : Canadian Wildlife Service, 1984. 27 p. : charts Progress notes ; no. 142 "February 1984." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Variations de l'exportation nette de canards malards de l'ouest du Canada et des états américains voisins, de 1972 à 1982. Includes bibliographical references. "Surveys by the USFWS/CWS show that the number of Mallard in May in the main production areas of the US and western Canada has dropped from 10.4 million in 1970 to 7.1 million in 1983"--Abstract. gccst Aquatic birds gccst Population distribution Mallards Boyd, H. Canada. Environment Canada. Canadian Wildlife Service. Variations de l’exportation nette de Canards malards de l’Ouest du Canada et des États américains voisins, de 1972 à 1982 (CaOODSP)9.860591 Progress notes (Canadian Wildlife Service) no. 142 (CaOODSP)9.504439 PDF 888 KB https://publications.gc.ca/collections/collection_2018/eccc/CW69-9-142-eng.pdf