title: Flame retardants in eggs of four gull species (Laridae) from breeding sites spanning Atlantic to Pacific Canada.
abstract: To compare legacy and emerging flame retardant (FR) contamination in Canadian marine and freshwater ecosystems, eggs of four gull species (Laridae) were collected from 26 colonies spanning Pacific to Atlantic Canada, including in the Great Lakes basin. Fourteen polybrominated diphenyl ether (PBDE) congeners and 20 non-PBDE FRs were analyzed, but BDE-47, -99, -100, -153, -154 and -209, hexabromocyclododecane (HBCD) and Dechlorane Plus (DP) syn- and anti-isomers were common, and where concentrations of ∑PBDEs (37-610 ng/g wet weight, ww) ≫ HBCD (0.5-12 ng/g ww) > ∑DP (not quantifiable-5.5 ng/g ww). All other FRs were generally not detectable. Stable nitrogen and carbon isotopes used as dietary tracers provided insights into the diet choice influences on the exposure sources and contamination patterns (e.g., PBDE congener compositions) for individual gulls from the same colony. Eggs from gulls breeding near metropolitan regions of higher human densities showed greater PBDE burdens than from other ecosystems.
authors.affiliation: Ecotoxicology and Wildlife Health Division, Environment Canada, National Wildlife Research Centre, Carleton University, Ottawa, ON K1A 0H3, Canada.
authors.forename: Da
authors.initials: D
authors.lastname: Chen
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Letcher
authors.forename: Neil M
authors.initials: NM
authors.lastname: Burgess
authors.forename: Louise
authors.initials: L
authors.lastname: Champoux
authors.forename: John E
authors.initials: JE
authors.lastname: Elliott
authors.forename: Craig E
authors.initials: CE
authors.lastname: Hebert
authors.forename: Pamela
authors.initials: P
authors.lastname: Martin
authors.forename: Mark
authors.initials: M
authors.lastname: Wayland
authors.forename: D V
authors.initials: DV
authors.lastname: Chip Weseloh
authors.forename: Laurie
authors.initials: L
authors.lastname: Wilson
mesh_terms: D000818:Animals; D002170:Canada; D046091:Charadriiformes; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000378:metabolism*; D004787:Environmental Pollution / Q000706:statistics & numerical data; D005411:Flame Retardants / Q000378:metabolism*; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism; D010063:Ovum / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers