Heavy metal contamination status of Japanese cranes (Grus japonensis) in east Hokkaido, Japan - Extensive mercury pollution

Hiroki Teraoka, Yoshihiro Kumagai, Hisae Iwai, Kensaku Haraguchi, Takashi Ohba, Kunihiko Nakai, Hiroshi Satoh, Mineshi Sakamoto, Kunikazu Momose, Hiroyuki Masatomi, Takeo Hiraga

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Japanese cranes (Grus japonensis) of eastern Hokkaido, Japan, and migrants between the Amur River basin and the eastern China-Korea Peninsula, live around fresh and brackish wetlands. Only a few thousand cranes are confirmed to exist in the world, so they are under threat of extinction. To understand the adverse effects of metal accumulation, we measured concentrations of three heavy metals in the liver, kidney, and muscle of 93 Japanese cranes from Hokkaido. The cranes were classified into six categories according to their sex and three life stages. Cadmium and mercury (Hg: total mercury) showed age-dependent but not sex-dependent accumulation in the liver and kidney. Twenty cranes showed 30 μg/g or higher levels of Hg in dry tissue and five adult cranes had more than 100 μg/g in their livers or kidneys. Cadmium concentrations were generally lower in all samples. Two adult cranes showed extremely high lead levels of more than 30 μg/g in their livers, suggesting lead poisoning. These results have highlighted the widespread and high levels of Hg pollution in Japanese cranes in Hokkaido, Japan.

本文言語English
ページ(範囲)307-312
ページ数6
ジャーナルEnvironmental Toxicology and Chemistry
26
2
DOI
出版ステータスPublished - 2007 2

ASJC Scopus subject areas

  • Environmental Chemistry
  • Health, Toxicology and Mutagenesis

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