Efeitos subletais da poluição por petróleo e derivados sobre peixes da Amazônia (Amazonas, Brasil)
The present work analyzed the changes in biomarkers of exposure and effects in fishes of the Amazon, especially from Negro river, exposed to the crude oil and derivatives; and verified the responses of these biomarkers according to the physical and chemical characteristics of the water. The set o...
| Autor principal: | Sadauskas-Henrique, Helen |
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| Grau: | Tese |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11496 http://lattes.cnpq.br/1910990054248099 |
| Resumo: |
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The present work analyzed the changes in biomarkers of exposure and effects in fishes of
the Amazon, especially from Negro river, exposed to the crude oil and derivatives; and
verified the responses of these biomarkers according to the physical and chemical
characteristics of the water. The set of biomarkers, EROD; GST; SOD and CAT; serum
SDH; LPO, erythrocytic DNA damage and HPA bile metabolites, proved to be efficient in
demonstrate the Benzo[a]Pyrene (B[a]P) effects in tambaqui, and can be considered a
promising set of biomarkers to evaluate the effects of the crude oil and derivatives in
Amazon fishes. The chemical dispersion of the Urucu crude oil resulted in the increase of
toxicity to tambaqui, as seen by the increased responses of a set of biomarkers: EROD;
GST; SOD and CAT; serum SDH; LPO, erythrocytic DNA damage and HPA bile
metabolites. However, the magnitude of the responses of these biomarkers was higher in
specimens acclimated to natural water from the Negro river (low ion availability and high
dissolved organic carbon (DOC) concentration). The accidental oil spill in the Negro river
(São Raimundo harbor) caused increase in the biomarkers of exposure and effect in two
resident cichlid fish species; this increase was not related with the reduction of the Policlic
Aromatic Hydrocarbons (PAH) concentration in the water column. Moreover, the PAH
concentration in water along with the DOC concentration were related to responses of these
biomarkers, as observed through the multivariate analyzes. Thereby, it is possible to say
that the set of studied biomarkers in fishes from the Negro river is of great relevance to
evaluate the quality of this environment after the contamination of the Negro river with
crude oil and derivatives. |