Contamination status and accumulation characteristics of heavy metals and arsenic in five seabird species from the central Bering Sea

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Author(s)

    • ISHII Chihiro
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan
    • IKENAKA Yoshinori
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan|Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
    • NAKAYAMA Shouta M.M.
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan
    • MIZUKAWA Hazuki
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan
    • YOHANNES Yared Beyene
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan|Department of Chemistry, College of Natural and Computational Science, University of Gondar, P.O. Box 196, Gondar, Ethiopia
    • WATANUKI Yutaka
    • Faculty of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-cho, Hakodate 041-8611, Japan
    • FUKUWAKA Masaaki
    • Hokkaido National Fisheries Research Institute, Japan Fisheries Research and Education Agency, 2-2-4-1 Nakanoshima, Toyohira-ku, Sapporo 062-0922, Japan
    • ISHIZUKA Mayumi
    • Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo 060-0818, Japan

Abstract

<p>Seabirds are marine top predators and accumulate high levels of metals and metalloids in their tissues. Contamination by metals in the highly productive offshore region has become a matter of public concern. It is home to 80% of the seabird population in the U.S.A., 95% of northern fur seals (<i>Callorhinus ursinus</i>), and major populations of Steller sea lions (<i>Eumetopias jubatus</i>), walruses (<i>Odobenus rosmarus</i>) and whales. Here, the concentrations of eight heavy metals (Hg, Cd, Cr, Co, Ni, Cu, Zn and Pb) and a metalloid (As) in the liver and kidneys of the northern fulmar (<i>Fulmarus glacialis</i>), thick-billed murre (<i>Uria lomvia</i>), short-tailed shearwater (<i>Puffinus tenuirostris</i>), tufted puffin (<i>Fratercula cirrhata</i>) and horned puffin (<i>Fratercula corniculata</i>) collected in the Bering Sea were measured. As proxies of trophic level and habitat, nitrogen (δ<sup>15</sup>N) and carbon (δ<sup>13</sup>C) stable isotope ratios of breast muscles were also measured. Hepatic Hg concentration was high in northern fulmar, whereas Cd level was high in tufted puffin and northern fulmar. The Hg concentration and δ<sup>15</sup>N value were positively correlated across individual birds, suggesting that Hg uptake was linked to the trophic status of consumed prey. Furthermore, Hg concentration in our study was higher than those of the same species of seabirds collected in 1990.</p>

Journal

  • Journal of Veterinary Medical Science

    Journal of Veterinary Medical Science 79(4), 807-814, 2017

    JAPANESE SOCIETY OF VETERINARY SCIENCE

Codes

  • NII Article ID (NAID)
    130007331465
  • Text Lang
    ENG
  • ISSN
    0916-7250
  • Data Source
    J-STAGE 
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