Enantioselective Accumulation of α-Hexachlorocyclohexane in Northern Fur Seals and Double-Crested Cormorants: Effects of Biological and Ecological Factors in the Higher Trophic Levels

摘要: Tissues of northern fur seals (Callorhinus ursinus) from the Pacific coast Japan and double-crested cormorants (Phalacrocorax auritus) Great Lakes were analyzed in order to explore enantioselective accumulation α-hexachlorocyclohexane (HCH). The effects biological ecological factors such as species, tissue, sex, age, feeding habit, habitat, which may be attributable differences between enantiomers, also investigated. enantiomeric ratios (ERs) (+)-/(−)-α-HCH fat tissue female seals, composed different age groups, collected 1986 (1.58 ± 0.25) exhibited greater values than those abiotic lower trophic levels previously reported. No trend ERs was found seals. There appeared a temporal transition adult 1971−1988. Regression analysis showed significant relationship habits (p = 0.003). Analysis breast muscle dou...