Produção Nacional
Determinação de ΣDDT encontradas em peixes comestíveis de diferentes áreas da Amazônia brasileira
2007; Volume: 11; Issue: 2 Linguagem: Inglês
10.4257/oeco.2007.1102.04
ISSN1981-9366
AutoresCláudio D'Amato, João Paulo Machado Torres, Olaf Malm,
Tópico(s)Mercury impact and mitigation studies
ResumoNormal 0 21 false false false MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Commercial fish samples from quatro areas in Brazilian Amazon: Boa Vista, Roraima State (n=1); Tapajós River Basin (n=33); Madeira River Basin (n=23), and Balbina Lake (n=5), Amazonas State, were collected or bought in markets between the years 1990 to 1993 and 1996. In 2002, there was a new sampling along Madeira River (n=22) again, and Itacoatiara, in the Amazon River (n=20). The analysis of the ? DDT levels were done by high resolution gas chromatography with electron capture detector. The concentrations ranged between 0.6ng.g -1 to 150.3ng.g -1 (wet-weight) in Itaituba. In the more recent samples from Madeira River and Itacoatiara city, the ? DDT levels (wet weight) ranged from no detectable levels to 8.9ng.g -1 , showing a reduction in the fish concentrations along the last decade. Based on estimated breast-milk levels, results indicated that mothers consuming 550g of fish.day -1 in Itaituba and Boa Vista could have at this time breast milk ? DDT concentrations sufficiently high to expose infants to levels above a proposed Tolerable Daily Intake dose of 5 x 10 -3 mg/kg/day for breastfeeding infants suggested by Marien & Laflamme (1995).
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