Exposure assessment of estuarine dolphin (Sotalia guianensis Van Benédén, 1864) to organic tin compounds through hepatic total tin concentrations in the southeast and south of Brazil
| العنوان: | Exposure assessment of estuarine dolphin (Sotalia guianensis Van Benédén, 1864) to organic tin compounds through hepatic total tin concentrations in the southeast and south of Brazil |
|---|---|
| المؤلفون: | Schilithz, Priscila Ferreira |
| المساهمون: | Brito Junior, José Lailson, Dorneles, Paulo Renato, Malm, Olaf, Fernandez, Marcos Antonio dos Santos |
| المصدر: | Biblioteca Digital de Teses e Dissertações da UERJ Universidade do Estado do Rio de Janeiro (UERJ) instacron:UERJ |
| بيانات النشر: | Universidade do Estado do Rio de Janeiro, 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | Tin, CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIA::OCEANOGRAFIA BIOLOGICA [CNPQ], Sotalia guianensis, TBT, Antifouling agent, Estanho, Agente antiincrustante |
| الوصف: | Submitted by Boris Flegr (boris@uerj.br) on 2021-01-07T14:46:42Z No. of bitstreams: 1 Dissertacao completa.pdf: 2003483 bytes, checksum: 76dd18616e5dd51a169301b9cd8aa3b8 (MD5) Made available in DSpace on 2021-01-07T14:46:42Z (GMT). No. of bitstreams: 1 Dissertacao completa.pdf: 2003483 bytes, checksum: 76dd18616e5dd51a169301b9cd8aa3b8 (MD5) Previous issue date: 2013-04-18 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior During the last decades, the large pollutant input has led to an increased concern over marine ecosystems. This environmental contamination results in deleterious effects on aquatic organisms and humans. Among the anthropogenic activities that may introduce persistent bioaccumulative toxicants (PBTs) into the marine environment is the use of antifouling paint. It is applied on ship hulls and other floating structures to prevent algae, mussels and other organisms to fix on these surfaces. Often, organotin compounds (OTs), such as Tributyltin (TBT) or Triphenyltin (TPT), constituted the active ingredient in these mixtures. Due to the high toxicity of these compounds, the IMO (International Maritime Organization), banned their use entirely. As OTs are readily bioaccumulated, high total tin (SnT) concentrations have been found in cetaceans (Mammalia, Cetacea). Guiana dolphins (Sotalia guianensis, Van Beneden, 1864) occupy high trophic levels and bioaccumulate the PBTs they are exposed to. Some authors reported that hepatic tin is predominantly found in its organic form in cetaceans, as inorganic tin is poorly absorbed by gastrointestinal mucosa. Therefore, the hepatic SnT concentration reflect the input of anthropogenic OTs. The present study aimed to evaluate Guiana dolphin exposure to OTs in Brazilian waters through hepatic total tin (SnT = organic + inorganic) concentrations. Analyses were performed by Graphite Furnace Atomic Absorption Spectrometry (GFAAS). Guiana dolphin samples from diferente areas of the Brazilian litoral, comprising the Region of Grande Vitória (GV), Guanabara Bay (BG), Sepetiba Bay (B.Sep), Paranaguá Bay (PR) and Babitonga Bay (SC), have been analyzed for comparison of distinctly OT-contaminated environments. Hepatic SnT concentrations (ng/g dry weight) of Guiana dolphins varied from |
| وصف الملف: | application/pdf |
| اللغة: | Portuguese |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=od______3056::cfbe9662f9dbccbf41e01aa727b97d29 http://www.bdtd.uerj.br/handle/1/13882 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.od......3056..cfbe9662f9dbccbf41e01aa727b97d29 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |