Heavy metal contamination status of Japanese cranes (Grus japonensis) in east Hokkaido, Japan‐extensive mercury pollution
Heavy metal contamination status of Japanese cranes (Grus japonensis) in east Hokkaido, Japan‐extensive mercury pollution
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DOI：
10.1897/05-623r.1
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发表时间：
2007-02
影响因子：
4.1
通讯作者：
H. Teraoka;Yoshihiro Kumagai;Hisae Iwai;K. Haraguchi;Takashi Ohba;Kunihiko Nakai;H. Satoh;M. Sakamoto;Kunikazu Momose;H. Masatomi;T. Hiraga
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文献类型：
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作者：
H. Teraoka;Yoshihiro Kumagai;Hisae Iwai;K. Haraguchi;Takashi Ohba;Kunihiko Nakai;H. Satoh;M. Sakamoto;Kunikazu Momose;H. Masatomi;T. Hiraga
- 日本北海道东部的日本鹤（Grus japonensis），以及阿穆尔河流域和中国-朝鲜半岛东部之间的迁徙者，生活在淡水和半咸水湿地周围。世界上只有几千只鹤被证实存在，因此它们正面临灭绝的威胁。为了了解金属积累的不良影响，我们测量了来自北海道的93只日本鹤的肝脏、肾脏和肌肉中三种重金属的浓度。根据鹤的性别和三个生活阶段，将它们分为六类。镉和汞（Hg：总汞）在肝脏和肾脏中显示出年龄依赖性但非性别依赖性蓄积。20只鹤的干组织中汞含量在30 μg/g或更高，5只成年鹤的肝脏或肾脏中汞含量超过100 μg/g。镉浓度普遍较低，在所有样品。两只成年鹤的肝脏铅含量极高，超过30微克/克，提示铅中毒。这些结果突出表明，日本北海道的日本鹤体内存在广泛且高水平的汞污染。
—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.