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[D-2.4 Environmental Monitoring of the World Oceans with Chemical Substances Accumulated in Squid Livers]

[Contact Person]

Motohiko Sugiyama(Takeshi Umezu -94.3)
Division Director, Environment Preservation Division
National Research Institute of Fisheries Science
Fisheries Agency
6 Nagai, Yokosuka, Kanagawa 238-03 Japan
Phone +81-468-56-2887, Fax +81-468-57-3075

[Total Budget for FY1991-1994]

68,537,000 Yen (FY1994 18,236,000 Yen)

[Abstract]

　The best way to find out a current state of marine pollution is to collect seawater samples and analyze them. But it is difficult to collect them from the world oceans and to analyze in very low concentration of pollutants. In squid livers various pollutants can be readily bioaccumulated, Using squid liver, we can monitor open seas where mussel watch can not cover. About 30 species of squids around the Japan and from the world oceans, we determined the organotin compounds(TBT, TPT), PCBs, artificial radionuclides(⁶⁰Co, ^108mAg, ^110mAg), heavy metals, and PAH[(B(k)P, B(a)F, B(ghi)P] in livers. The concentration of those pollutants is higher in the northern hemisphere than in the southern hemisphere, and the highest near the Japanese waters. Bioaccumulation for TBT, PCB, and Co is estimated at about 10^4-5 and Ag is estimated about 10⁷.

[Key Words]

Squid Liver, Organotins, PCBs, PAH, Radionuclides, Heavy Metals