title: Butyltins, trace metals and morphological variables in surf scoter (Melanitta perspicillata) wintering on the south coast of British Columbia, Canada.
abstract: From 1998 to 2001 we examined spatial and temporal variation in uptake of contaminants by surf scoters (Melanitta perspicillata) in the Georgia Basin region of the Pacific coast of Canada. Samples were collected during late fall and early spring at industrialized and reference locations, carcasses examined, and tissues collected for histology, biomarkers, and contaminant analyses. Scoters from both Vancouver and Victoria harbours had significantly higher hepatic concentrations of summation operatorbutyltins than birds from a reference site. In adult male surf scoters, hepatic summation operatorbutyltins increased over the winter at two sites (p=0.02, n=26), while mercury increased (p=0.03, n=15) and selenium decreased at one site (p=0.001, n=15). Body condition decreased over the winter at both the treatment site, Howe Sound (p<0.0001, n=12), and the reference site, Baynes Sound (p=0.02, n=15). Multiple regression analysis using Akaike's Information Criteria (AIC(C)) showed an association between hepatic butyltin concentrations and overall body condition (p=0.06, r=-0.237).
authors.affiliation: Environment Canada, Science and Technology Branch, Pacific Wildlife Research Centre, 5421 Robertson Rd., RR1 Delta, British Columbia V4K 3N2, Canada. john.elliott@ec.gc.ca
authors.forename: J E
authors.initials: JE
authors.lastname: Elliott
authors.forename: M L
authors.initials: ML
authors.lastname: Harris
authors.forename: L K
authors.initials: LK
authors.lastname: Wilson
authors.forename: B D
authors.initials: BD
authors.lastname: Smith
authors.forename: S P
authors.initials: SP
authors.lastname: Batchelor
authors.forename: J
authors.initials: J
authors.lastname: Maguire
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology*; D001822:Body Burden; D001824:Body Constitution; D001955:British Columbia; D003300:Copper / Q000032:analysis; D004463:Ecology / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis*; D008099:Liver / Q000737:chemistry; D008628:Mercury / Q000032:analysis; D010573:Pesticide Residues / Q000032:analysis*; D012621:Seasons; D012643:Selenium / Q000032:analysis; D014131:Trace Elements / Q000032:analysis*; D014220:Trialkyltin Compounds / Q000032:analysis*
chemical_list: D004785:Environmental Pollutants; D010573:Pesticide Residues; D014131:Trace Elements; D014220:Trialkyltin Compounds; C011559:tributyltin; D003300:Copper; D008628:Mercury; D012643:Selenium