00000nam 2200000za 4500 9.858708 CaOODSP 20241203113643 cr ||||||||||| 180709s2006 bccd o f00| 0 eng d CaOODSP eng eng fre n-cn-bc CW69-5/459E-PDF Sex and age - specific distributions of sea ducks wintering in the Strait of Georgia, British Columbia [electronic resource] : implications for the use of age ratios as an index of recruitment / S.A. Iverson ... [et al.]. Delta, B.C. : Canadian Wildlife Service, Pacific and Yukon Region, 2006. vii, 56 p. : charts. Technical report series ; no. 459 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "Management of sea duck populations in North America has been hampered by a lack of effective population monitoring tools. In this study, we used sex and age ratios calculated from direct visual counts to assess the demographic structure of the nine most common sea duck species wintering in the Strait of Georgia, British Columbia: Black Scoters (Melanitta nigra), Surf Scoters (M. perspicillata), White-winged Scoters (M. fusca), Harlequin Ducks (Histrionicus histrionicus), Barrow’s Goldeneye (Bucephala islandica), Common Goldeneye (B. clangula), Bufflehead (B. albeola), Common Mergansers (Mergus merganser), and Red-breasted Mergansers (M. serrator)"--Abstract. Issued also in print format. Includes abstract in French. gccst Aquatic birds gccst Population distribution Sea ducks Iverson, S. A. (Samuel A.), 1973- Canada. Environment Canada. Canadian Wildlife Service. Pacific and Yukon Region. Sex and age–specific distributions of sea ducks wintering in the Strait of Georgia, British Columbia : (CaOODSP)9.617822 Technical report series (Canadian Wildlife Service) no. 459. (CaOODSP)9.504438 PDF 525 KB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-459-eng.pdf