東京湾産ホシザメのPCBについて

概要

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Lipids were extracted successively with n-hexane and chloroform-methanol (2:1) mixture from each of flesh, liver and other viscera sample taken from 7 spotted sharks in Tokyo Bay one of which had embryos, and the contents and composition patterns of chlorobiphenyls were examined.Among immature fish, a linear relation was observed between body weight and total PCB content. Most of the accumulated PCBs were found in liver and consisted mainly of hexa- and hepta- chlorinated compounds. In parent fish, however, the PCB content in flesh was as high as that in liver. Once matured, the PCB content in flesh tended to increase, possibly with age.In embryos, the PCB content of yolk lipid was twice that of body lipid though much lower than that of parent fish liver. The chloroform-methanol extracted lipid from parent fish liver was similar in PCB composition pattern to that of egg lipid, suggesting a probable involvement of the former lipid in the biosynthesis of the latter.
公益社団法人日本水産学会の論文