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|Título:||Guiana Dolphins ( Sotalia guianensis ) and DR-CALUX for Screening Coastal Brazilian Environments for Dioxins and Related Compounds|
|Autor(es):||Dorneles, Paulo R.|
Bisi, Tatiana L.
Barbosa, Lupércio A.
Meirelles, Ana C. O.
Carvalho, Vitor L.
Azevedo, Alexandre F.
|Data do documento:||Jul-2016|
|Editor:||Archives of Environmental Contamination and Toxicology|
|Citação:||DORNELES, P. R. ; LAILSON-BRITO, J. ; BISI, T. L. ; DOMIT, C. ; BARBOSA, L. A. ; MEIRELLES, A. C. O. ; CARVALHO, V. L. ; MALM, O. ; AZEVEDO, A. F. ; BROSE, F. ; DAS, K. ; SCIPPO, M.-L. (2016)|
|Abstract:||Guiana dolphin is the top predator of highest toxicological concern in Brazil and many studies on levels of persistent, bioaccumulative, and toxicant (PBT) pollutants have been performed on the species. However, due to high costs of the analyses, only one investigation comprised the determination of dioxins and related compounds (DRCs) in Guiana dolphin tissues. The dioxin responsive-chemically activated luciferase gene expression (DR-CALUX ) cell bioassay was used in the present study for the analyses of hepatic samples from 28 male Guiana dolphins in order to screen estuarine environments for DRCs, comprising three regions (Northeastern, Southeastern, and Southern) and four states [Parana ´ (PR), Rio de Janeiro (RJ), Espı ´rito Santo (ES), and Ceara ´ (CE)] of Brazil. High bioanalytical equivalent (BEQ) concentrations [dioxins (pg BEQ/g lipid)] were found, varying from 1.94 to 15.6 pg BEQ/g. A signiﬁcant negative correlation between BEQ concentrations and total length was found in Guiana dolphins from Brazil (all analysed dolphins). This pattern also was veriﬁed for RJ state, pointing to (1) chemically induced developmental disruption or to (2) increasing efﬁciency of the detoxifying activity with the growth of the animal. Comparison was performed with literature data and signiﬁcantly higher BEQ levels were found in Brazilian Guiana dolphins than in those reported for North Sea harbour porpoises. Higher levels were found in Southeastern (the most PBT-contaminated area of the country) than in Southern region. However, it is not possible to afﬁrm that Guiana dolphins are more contaminated by DRCs in SE than in S region, because individuals were lengthier in S than in SE region. Our results seem to have mirrored dolphin exposure to PCBs in Brazil according to the literature. Further studies are required for investigating the hypotheses 1 and 2 mentioned above.|
|Descrição:||DORNELES, Paulo R. Guiana Dolphins (Sotalia guianensis ) and DR-CALUX for screening castal brazilian environments for dioxins and related compounds. Archives of Environmental Contamination and Toxicology, v. 71, n. 3, p. 336-346, jul., 2016.|
|Aparece nas coleções:||DPML - Artigos publicados em revista científica|
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