00000nam 2200000za 4500 9.856430 CaOODSP 20241203113643 cr ||||||||||| 180510s1989 nkcd ob f000 0 eng d 0662173899 0831-6481 CaOODSP eng eng fre n-cn-nk CW69-5/84E-PDF CW69-5/84E Parker, G. R. Breeding waterfowl, wetlands acidity and food resources in the Lepreau River watershed of southern New Brunswick [electronic resource] / G.R. Parker, M. Petrie, D. Sears. Sackville, N.B. : Canadian Wildlife Service, Atlantic Region, 1989. vi, 37 p. : charts. Technical report series ; no. 84 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (p. 14-17). "Species richness and density of waterfowl breeding on wetlands in forested habitat in southern New Brunswick were considerably lower than on more productive and abundant wetlands in similar habitat in Ontario. The Black Duck (Anas rubripes) and Ring-necked Duck (Aythya collaris) represented 60-70% of total breeding waterfowl. The abundance of aquatic invertebrates most influenced use of wetlands by broods of dabbling ducks. Moderately acidified wetlands caused changes in species composition of the invertebrate fauna but not total biomass. The presence and abundance of fish as a direct competitor for macro invertebrates significantly influenced wetland use by broods of insectivorous waterfowl. We did not identify water acidity as affecting directly the survival of insectivorous waterfowl broods or ducklings"--Abstract, p. i. Issued also in print format. Includes abstract in French. Waterfowl Waterfowl--Food Wetlands Water quality Lepreau River Watershed (N.B.) Petrie, M. Sears, D. Canada. Environment Canada. Canadian Wildlife Service. Atlantic Region. Technical report series (Canadian Wildlife Service) no. 84. (CaOODSP)9.504438 PDF 18.47 MB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-84-eng.pdf