Imposex and butyltin contamination still evident in Chile after TBT global ban

Imposex and butyltin contamination still evident in Chile after TBT global ban

Author Batista, Rodrigo Moço Google Scholar
Castro, Ítalo Braga Autor UNIFESP Google Scholar
Fillmann, Gilberto Google Scholar
Abstract Imposex in gastropods (Acanthina monodon, Oliva peruviana and Xanthochorus cassidiformis), butyltin levels in surface sediments (Coquimbo and Concepcion) and tissues (Valparaiso and Concepcion) were assessed in three areas under the influence of maritime activities along the central Chilean coast. The highest TBT concentrations were observed in Sao Vicente Bay (Concepcion), reaching 122.3 ng Sn g(-1) in surface sediments and 59.7 ng Sn g(-1) in gastropods tissue, while in Valparaiso ranged from 7.4 to 15.8 ng Sn g(-1) in biota. The lowest TBT concentrations were detected in sediments from Coquimbo (<2 ng Sn g(-1)), which can be attributed to a much lower ship/boat traffic (probably using TBT free products) in association to local oceanographic conditions. Despite DBT and MBT were the predominant analytes, recent inputs of TBT were evident in some areas. In fact, fishing boats may be a relevant source since they were the predominant maritime activity in the most contaminated sites. In addition, the absence of significant differences within BTs levels between both genders of A. monodon suggests that tissues from distinct sexes can be indistinctly used for future contamination studies. Imposex incidence was detected in 11 out of 15 sampled sites, indicating that environmental levels of TBT have been sufficient to induce deleterious effects on the exposed organisms. Thus, the impacts caused by TBT in Chilean coastal areas were detectable and consistent with other studies performed in South America. This present environmental contamination is probably due to the lack of regulations forbidding the use of TBT-based antifouling paints in Chile. (C) 2016 Elsevier B.V. All rights reserved.
Keywords Antifouling
Acanthina monodon
Oliva peruviana
Xanthochorus cassidiformis
Sediments
Fresh inputs
xmlui.dri2xhtml.METS-1.0.item-coverage Amsterdam
Language English
Sponsor Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number CAPES: 802-16/2012
FAPERGS: 0885/12-1
CNPq: PQ 312341/2013-0
Date 2016
Published in Science Of The Total Environment. Amsterdam, v. 566, p. 446-453, 2016.
ISSN 0048-9697 (Sherpa/Romeo, impact factor)
Publisher Elsevier Science Bv
Extent 446-453
Origin https://dx.doi.org/10.1016/j.scitotenv.2016.05.039
Access rights Closed access
Type Article
Web of Science ID WOS:000381060900046
URI https://repositorio.unifesp.br/handle/11600/57094

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