00000cam 2200000za 4500 9.855469 CaOODSP 20241203113642 cr ||||||||||| 180418s1976 onc |||#o f00| 0 eng d CaOODSP eng eng fre n-cn--- CW69-1/22E-PDF Whitman, W. R. Impoundments for waterfowl [electronic resource] / by W.R. Whitman. Ottawa : Canadian Wildlife Service, c1976. 22 p. Occasional paper ; no. 22 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Studies were initiated in 1972 to (1) identify factors involved in the aging of freshwater impoundments which affect waterfowl use; (2) evaluate the effect of impoundment upon the nutrient export - import balance within a tidal marsh; and (3) consider undesirable side-effects of parasitism caused by the concentration of waterfowl"--Abstract. Includes abstract in French. gccst Aquatic birds gccst Wetlands Impoundments Canada. Environment Canada. Canadian Wildlife Service. Occasional paper (Canadian Wildlife Service) no. 22 (CaOODSP)9.504780 PDF 1.70 MB https://publications.gc.ca/collections/collection_2018/eccc/CW69-1-22-eng.pdf