00000cam 2200000za 4500 9.855508 CaOODSP 20241203113642 cr ||||||||||| 180419s1976 onc |||#o f00| 0 eng d CaOODSP eng eng fre n-cn--- CW69-1/24E-PDF Sugden, Lawson G. Waterfowl damage to Canadian grain [electronic resource] : current problem and research needs / by Lawson G. Sugden. Ottawa : Canadian Wildlife Service, c1976. 25 p. Occasional paper ; no. 24 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Waterfowl damage to crops in Alberta, Saskatchewan and Manitoba first became severe in the 1940's when the practice of swathing grain became prevalent. Mallards (Anas platyrhynchos) cause the most damage, which is sustained primarily by barley and wheat. Loss of grain is most severe in wet autumns that delay the harvest and tends to be chronic near large wetlands that harbour ducks in autumn"--Abstract. Includes abstract in French. gccst Aquatic birds gccst Crops gccst Pests Waterfowl Canada. Environment Canada. Canadian Wildlife Service. Occasional paper (Canadian Wildlife Service) no. 24 (CaOODSP)9.504780 PDF 2.26 MB https://publications.gc.ca/collections/collection_2018/eccc/CW69-1-24-eng.pdf