J. Phys. IV France
Volume 107, May 2003
Page(s) 1393 - 1398

J. Phys. IV France
107 (2003) 1393
DOI: 10.1051/jp4:20030562

Comparative study of mercury in liver and muscle of Dall's porpoise (Phocoenoides dalli) off Sanriku coast of Japan

J. Yang1, 2, T. Kunito3, S. Tanabe3 and N. Miyazaki4

1  lnstitute of Hydrobiology, The Chinese Academy of Sciences, Wuhan, Hubei 430072, China
2  Freshwater Fisheries Research Center, The Chinese Academy of Fishery Sciences, No. 1 Qitang, Wuxi City, Jiangsu 214081, China
3  Center for Marine Environmental Studies, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Ehime, Japan
4  Otsuchi Marine Research Center, Ocean Research Institute, University of Tokyo, Akahama 2-106-1, Otsuchi 028-1102, Iwate, Japan

Liver and muscle samples of 22 Dall's porpoises (Phocoenoides dalli ) collected off Sanriku coast of Japan were analyzed to compare the bioaccumulation of total mercury ( $\Sigma$Hg) and organic mercury (OrgHg). Concentrations of $\Sigma$Hg and OrgHg in the liver were significantly higher than those in the muscle. In the liver evident detoxification effect of Hg was suggested by that concentrations of $\sigma$Hg were usually much higher than those of OrgHg. In the muscle such effect was limited as $\Sigma$Hg concentrations were closed to those of OrgHg.

© EDP Sciences 2003