天然および養殖リラフグの重属含量について

抄録

The muscles of wild and cultured puffers Fugu rubripes of different sizes were analyzed for heavy metals such as cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn), manganese (Mn), nickel (Ni), and dcobalt (Co) by atomic absorption spectrometry after wet digestion. Each heavy metal content was on a level similar to that of young fish in both wild and cultured state and hardly and change was found with growth rgard to heavy metal content. Acompaison of ench heavy metal content of cultured puffer with that of its diet, sardine; showed that there is no bioaccumulation of these heavy metals through food chain in cultured puffer. The concentraiton of each metal in wild puffer was 0.025±2.2ppm for Cd, 0.24±0.02ppm for Pb, 0.29±0.03ppm for Cu, 8.5±2.2ppm for Zn, 0.505±0.005ppmfor Mn, 0.12±0.02ppm for Ni, and 0.055±0.003ppm for Co. These metal concentrations of wild puffer were almost the same as those of cultured puffer in spite of the intake of different diets, and there was no problem with regard to food hygiene about these hevy metal concentrations.