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precedente: S5
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livello superiore: S5
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seguente: S5.2
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S5.1 - Metallothionein in Perna perna: Potential biomarker for monitoring
heavy metal pollution in Guanabara Bay, Rio de Janeiro, Brazil
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Mao Andrea (1)*,
Bottos Daniela (1),
Manca Daniela (1),
Manente Sabrina (1),
Batalha Fernando (2),
Verçosa Carvalheira Lucia (3),
Perin Guido (1)
| (1) |
Dipart. di Scienze Ambientali, Università Ca' Foscari di
Venezia, Calle Larga S. Marta 2137 - Dorsoduro, 30123 Venezia, Italia |
| (2) |
FEEMA (Fundação Estadual de Engenharia do Meio Ambiente),
Avenida Nossa Senhora de Copacabana, Rio de Janeiro, Brasil |
| (3) |
UERJ - Universidade do Estado do Rio de Janeiro, Departamento de
Oceanografia, Rua São Francisco Xavier 524, Rio de Janeiro, Brasil |
| * |
mao@unive.it |
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Guanabara Bay is one of the largest coastal bays in Brazil; this bay measures
31 km from south to north and has a surface area of about 400 km2 of
estuarine waters and is important for southeast Brazilian coast fisheries
ecology. It is an eutrophic, polluted system, impacted by largely untreated
domestic runoff from the 8 million human inhabitants of its basin.
Metallothioneins (MTs) induction as a response to metal exposure is well
documented, and thus MTs have been proposed as biomarkers of trace metal
pollution in numerous species from different zoological groups. In the present
study the mussel Perna perna was collected in Guanabara Bay during
December 2004. More precisely, sampling (8 sites) was realized in the south
part of Bay; determination of MTs has been done in the mussel digestive
gland, estimating sulphydrylic groups residue content using Ellman's reagent.
The response of mussels exposed to metals in well-contrasted sites in terms of
metal availability was investigated, but avoiding intersite significant
differences in natural parameters such as temperature and salinity. In fact
the relevance of the use of MTs concentrations as biomarkers of metal
pollution depends on the relative importance of natural factors and
contamination factors in governing the concentration of this protein in
organisms or in peculiar organs.
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consulta l' Indice analitico (alfabetico per autore) |
sfoglia l' Indice delle sessioni del Congresso |
a cura di Comoglio, Comino, e Bona
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