000 01789nam  2200349za 4500
0019.849874
003CaOODSP
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008180111s1982    onc ||||o    f000 0 eng d
040 |aCaOODSP|beng
043 |an-cn-mb
0861 |aCW69-9/132E-PDF
24500|aAppraisal of autumn canvasback populations and harvest on the Delta Marsh during 1977 and 1978 |h[electronic resource] / |cby G. Hochbaum ... [et al.].
260 |a[Ottawa] : |bCanadian Wildlife Service, |c1982.
300 |a5 p.
4901 |aProgress notes ; |vno. 132
500 |a"November 1982."
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
500 |aIssued 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.
504 |aIncludes bibliographical references.
520 |a"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.
69207|2gccst|aBirds
69207|2gccst|aPopulation
693 4|aCanvasback
7001 |aHochbaum, George Sutton, |d1946-
7101 |aCanada. |bEnvironment Canada.
7102 |aCanadian Wildlife Service.
77508|tÉvaluation des populations et des prises de morillons à dos blanc, en automne, au marais Delta, en 1977 et 1978 |w(CaOODSP)9.860499
830#0|aProgress notes (Canadian Wildlife Service)|vno. 132|w(CaOODSP)9.504439
85640|qPDF|s351 KB|uhttps://publications.gc.ca/collections/collection_2018/eccc/CW69-9-132-eng.pdf