00000nam 2200000za 4500 9.858801 CaOODSP 20241203113643 cr ||||||||||| 180710s2007 quc |ot f|0| 0 eng d 0-662-44739-9 CaOODSP eng eng fre n-cn-qu CW69-5/472E-PDF Rodrigue, Jean, 1961- Harlequin duck harvest and contamination in Québec [electronic resource] / Jean Rodrigue. Sainte-Foy, Québec : Canadian Wildlife Service, Québec region, 2007. vi, 21 p. : figures. Technical report series ; no. 472 Issued also in French under title: Récolte et contamination d’Arlequins plongeurs au Québec. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references. "Since 1990, the ban on Harlequin Duck (Histrionicus histrionicus) hunting has reduced the number of bird wings provided by hunters during the Species Composition Survey (SCS) conducted in eastern Canada by 78%. Nevertheless this reduction is not distributed equally between provinces. In Québec, information gathered on Harlequin Duck hunting and accidental killing between 1970 and 2004 showed that the latter is the primary cause of mortality for harlequins, followed by sport and subsistence hunting. Over 50% of birds killed originated from the North Shore of the St. Lawrence River. In order to better protect this species, communication strategies in isolated regions should be implemented. Concentrations of most organochlorine contaminants and of mercury, cadmium, arsenic, and selenium in Harlequin Ducks are lower than those known to cause health problems in birds. However, the only adult female captured in spring had a higher liver selenium concentration than the threshold value (3 μg/g; wet weight) beyond which reproductive problems are known to occur in birds under experimental conditions. "--Abstract, p. iii. Issued also in print format. Includes abstract in French. gccst Aquatic birds gccst Nature conservation Canada. Environment Canada. Canadian Wildlife Service. Quebec Region. Récolte et contamination d’Arlequins plongeurs au Québec (CaOODSP)9.858806 Harlequin Duck harvest and contamination in Québec / (CaOODSP)9.618115 Technical report series (Canadian Wildlife Service) no. 472. (CaOODSP)9.504438 PDF 307 KB https://publications.gc.ca/collections/collection_2018/eccc/cw69-5/CW69-5-472-eng.pdf CW69-5/472E