00000nam 2200000za 4500 9.849874 CaOODSP 20241203113641 cr ||||||||||| 180111s1982 onc ||||o f000 0 eng d CaOODSP eng n-cn-mb CW69-9/132E-PDF Appraisal of autumn canvasback populations and harvest on the Delta Marsh during 1977 and 1978 [electronic resource] / by G. Hochbaum ... [et al.]. [Ottawa] : Canadian Wildlife Service, 1982. 5 p. Progress notes ; no. 132 "November 1982." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Évaluation des populations et des prises de morillons à dos blanc, en automne, au marais Delta, en 1977 et 1978. Includes bibliographical references. "Drought conditions in Manitoba between July 1976 and April 1977 were the worst in 96 years. As a result, the number of May ponds had decreased by 45% and breeding duck populations by 53% in the spring of 1977 (Manitoba Waterfowl Technical Committee (MWTC) 1977)"--Introd. gccst Birds gccst Population Canvasback Hochbaum, George Sutton, 1946- Canada. Environment Canada. Canadian Wildlife Service. Évaluation des populations et des prises de morillons à dos blanc, en automne, au marais Delta, en 1977 et 1978 (CaOODSP)9.860499 Progress notes (Canadian Wildlife Service) no. 132 (CaOODSP)9.504439 PDF 351 KB https://publications.gc.ca/collections/collection_2018/eccc/CW69-9-132-eng.pdf