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Titolo:
High percentage of butyltin residues in total tin in the livers of cetaceans from Japanese coastal waters
Autore:
Le, LTH; Takahashi, S; Saeki, K; Nakatani, N; Tanabe, S; Miyazaki, N; Fujise, Y;
Indirizzi:
Ehime Univ, Dept Environm Conservat, Matsuyama, Ehime 7908566, Japan EhimeUniv Matsuyama Ehime Japan 7908566 Matsuyama, Ehime 7908566, Japan Oita Univ, Fac Educ, Oita 8701192, Japan Oita Univ Oita Japan 8701192Oita Univ, Fac Educ, Oita 8701192, Japan Univ Tokyo, Ocean Res Inst, Otsuchi Marine Res Ctr, Iwate 0281102, Japan Univ Tokyo Iwate Japan 0281102 uchi Marine Res Ctr, Iwate 0281102, Japan Inst Cetacean Res, Tokyo 1040055, Japan Inst Cetacean Res Tokyo Japan 1040055 Cetacean Res, Tokyo 1040055, Japan
Titolo Testata:
ENVIRONMENTAL SCIENCE & TECHNOLOGY
fascicolo: 11, volume: 33, anno: 1999,
pagine: 1781 - 1786
SICI:
0013-936X(19990601)33:11<1781:HPOBRI>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
MARINE MAMMALS; POLYCHLORINATED-BIPHENYLS; MERCURY CONTAMINATION; ACCUMULATION; DOLPHINS; TISSUES; PACIFIC; METHYLMERCURY; METABOLISM; ATLANTIC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Engineering, Computing & Technology
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Tanabe, S Ehime,Univ, Dept Environm Conservat, Tarumi 3-5-7, Matsuyama, Ehime 7908566 Ehime Univ Tarumi 3-5-7 Matsuyama Ehime Japan 7908566 me 7908566
Citazione:
L.T.H. Le et al., "High percentage of butyltin residues in total tin in the livers of cetaceans from Japanese coastal waters", ENV SCI TEC, 33(11), 1999, pp. 1781-1786

Abstract

There have been few reports on quantitative discussion of organic tin compounds based on total tin in environmental media and biota. The present study determined concentrations of total tin (Sigma Sn = organic + inorganic) and butyltin compounds (Sigma BTs = MBT + DBT + TBT) in the livers of cetaceans collected from Japanese coastal waters in order to estimate the ratio of Sigma BTs:Sigma Sn and to elucidate the role of anthropogenic butyltins in the view of total tin accumulation in these higher trophic organisms. Additionally, some cetacean species from open seas and oceans were also subjected to analyses for comparison purposes. Higher concentrations of Sigma Sn and Sigma BTs were found in coastal species than in offshore species, indicating greater input of tin compounds in coastal waters surrounding Japan. Sigma Sn concentrations increased with an increase in Sigma BTs residues in all species analyzed (r = 0.95, p < 0.001). Furthermore, Sigma BTs made up considerably higher percentages of the hepatic Sigma Sn in coastal species,with up to 74% in finless porpoise (Neophocaena phocaenoides) and 90% in bottlenose dolphin (Tursiops troncatus). These findings suggest that hepatictin in coastal cetaceans predominantly exists in organic form such as butyltin compounds, implying that tin residues in marine mammals reflect mostlythe input from anthropogenic sources. Despite some similar features expected between the residues of tin and mercury, anthropogenic exposure to tin compounds seems to be more apparent than exposure to mercury, which generally originates from natural exposure.

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Documento generato il 02/12/20 alle ore 18:02:15