title: Trends in organochlorine residue concentrations and burdens in grey seals (Halichoerus grypus) from Sable Is., NS, Canada, between 1974 and 1994.
abstract: In blubber from maternal grey seals (Halichoerus grypus) from Sable Is., NS, sigma DDT (p,p'-DDE and p,p'-DDT) concentrations declined from 12 micrograms/g lipid in 1974 to 0.5 microgram/g in 1994. Pup blubber sigma DDT concentrations were about 60% of those of their mothers, and declined at similar rates. In maternal seals, p,p'-DDE increased from 56% sigma DDT in 1974 to 89% in 1994. Polychlorinated biphenyl concentrations did not change between 1976 and 1988, but then declined; the relative proportion of chlorobiphenyl (CB) 101 increased, and those of CBs 170 and 187 decreased between 1985 and 1991. Concentrations of alpha-hexachlorocyclohexane and trans-nonachlor declined after 1988, and of oxychlordane after 1992; concentrations of hexachlorobenzene were constant between 1984 and 1994.
authors: DFO Institute of Ocean Sciences, PO Box 6000, Sidney BC, Canada V8L 4B2. addisonr@dfo-mpo.gc.ca
authors: R F
authors: RF
authors: Addison
authors: W T
authors: WT
authors: Stobo
mesh_terms: D000273:Adipose Tissue / Q000737:chemistry / Q000378:metabolism; D000818:Animals; D003634:DDT / Q000032:analysis* / Q000493:pharmacokinetics; D004785:Environmental Pollutants / Q000032:analysis / Q000493:pharmacokinetics*; D005260:Female; D009674:Nova Scotia; D010573:Pesticide Residues / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000493:pharmacokinetics; D046048:Seals, Earless / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D010573:Pesticide Residues; D003634:DDT; D011078:Polychlorinated Biphenyls