00000nam 2200000za 4500 9.849928 CaOODSP 20241203113641 cr ||||||||||| 180112s1983 oncd||||o f000 0 eng d CaOODSP eng n-cn-ab CW69-9/140E-PDF Boyd, H. Duck numbers and duck hunting in southern Alberta, 1975-82, and their implications for waterfowl management [electronic resource] / by H. Boyd and F.G. Cooch. [Ottawa] : Canadian Wildlife Service, 1983. 24 p. : charts Progress notes ; no. 140 "November 1983." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Les effectifs de canards et l'activité de chasse dans le sud de l'Alberta de 1975 à 1982 et les conséquences pour la gestion des oiseaux aquatiques. Includes bibliographical references. "From 1975 to 1982, southern Alberta's estimated May population of ducks fell from 6.5 to 3.6 million, a mean rate of - 5.6% annually"--Abstract. gccst Aquatic birds gccst Hunting (Sport) Ducks Waterfowl Cooch, F. G. Canada. Environment Canada. Canadian Wildlife Service. Les effectifs de canards et l’activité de chasse dans le sud de l’Alberta de 1975 à 1982 et les conséquences pour la gestion des oiseaux aquatiques (CaOODSP)9.860577 Progress notes (Canadian Wildlife Service) no. 140 (CaOODSP)9.504439 PDF 758 KB https://publications.gc.ca/collections/collection_2018/eccc/CW69-9-140-eng.pdf