title: Trace elements and butyltins in a Dall's porpoise (Phocoenoides dalli) from the Sanriku coast of Japan.
abstract: Concentrations and body burdens of 14 trace elements (Hg, Cr, Mn, Co, Cu, Zn, Sr, Ag, Cd, V, Se, Pb, Mo, and Fe) and butyltins (BTs) (tributyltin TBT, dibutyltin DBT, and monobutyltin MBT) were determined in various tissues of a mature male Dall's porpoise (Phocoenoides dalli) collected off the Sanriku coast of Japan. Selective accumulation in this porpoise was observed for Hg, Mn, Cu, Ag, Mo, Fe, and total BTs (TBT, DBT, and MBT) in the liver, Cd in the kidney, Zn, Sr, V, Pb, and Co in the bone, and Se in the skin. In contrast, Cr concentrations in all tissues were similar. This distribution pattern in this mature porpoise was in general agreement with the accumulation characteristics of trace elements and butyltins reported for other marine mammals. The whole body of the porpoise contained approximately 62 g Fe, 8.8 g Zn, 4.0 g Sr, 0.6g Se, 0.41 g Cu, 0.19 g Hg, 0.17 g Cd, 0.16 g Mn, 0.05 g Cr, 0.009 g Ag, 0.008 g Mo, 0.005 g Pb, 0.004 g Co, and 0.7 mg of BTs (0.4 mg TBT, 0.2 mg DBT, and 0.1 mg MBT). Metabolism of TBT to its breakdown products of this porpoise seems to be limited, since TBT still accounted for about half of the total burden of BTs. As in the cases of Hg, Mn, Cu, Se, and Fe, the muscle was the most important reservoir (43%) for the whole body burden of total BTs, 80% of which was TBT, and thus muscle played a crucial role in the higher body composition of TBT in this Dall's porpoise.
authors.affiliation: Freshwater Fisheries Research Center, Chinese Academy of Fishery Science, Qitang Road No. 1, Wuxi City, Jiangsu 214081, China. yangj@ori.u-tokyo.ac.jp
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Miyazaki
authors.forename: Takashi
authors.initials: T
authors.lastname: Kunito
authors.forename: Shinsuke
authors.initials: S
authors.lastname: Tanabe
mesh_terms: D000818:Animals; D001822:Body Burden; D004784:Environmental Monitoring; D007564:Japan; D008099:Liver / Q000737:chemistry; D008297:Male; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism; D009947:Organotin Compounds / Q000032:analysis / Q000378:metabolism; D019576:Porpoises / Q000378:metabolism*; D012643:Selenium / Q000032:analysis / Q000378:metabolism; D014220:Trialkyltin Compounds / Q000032:analysis / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D019216:Metals, Heavy; D009947:Organotin Compounds; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C056189:di-n-butyltin; C062120:n-butyltin; C011559:tributyltin; D012643:Selenium