8 documents found, page 1 of 1
Prevalence and factors associated with mercury exposure in riverside communitie...
Mendes,Vanessa Alves; Santos,Débora Aparecida da Silva; Farias,Edson dos Santos; Carvalho,Dario Pires de; Bastos,Wanderley RodriguesABSTRACT Objective: to verify mercury exposure prevalence and identify its possible associated factors in two riverside communities in the Madeira River basin of the Western Brazilian Amazon. Method: a cross-sectional study comprising 95 children and adolescents. Age cycle, school attendance, Bolsa Família, number of siblings, meals, fish consumption, height by age were measured. Binary logistic regression was ...
Dynamics of metals in lacustrine sediments: case study of the Madeira River, Am...
Carvalho,Dario Pires de; Almeida,Ronaldo de; Manzatto,Ângelo Gilberto; Freitas,Osvaldino Brito de; Bastos,Wanderley RodriguesABSTRACT The studies on metals in Madeira River’s principal flow show high variability of Co, Cr, Cu, Fe, Ni, Pb and Zn concentrations. However, the transfer of these metals from the main river channel, whose physical and chemical characteristics differ from those of lakes, has not been fully characterized. The objective of this study was to discuss how the transfer of Madeira River’s metals changes the spatial...
Bioaccumulation of methylmercury in fish tissue from the Roosevelt River, South...
Anjos,Marcelo Rodrigues dos; Machado,Nadja Gomes; Silva,Maria Eliana Peixoto da; Bastos,Wanderley Rodrigues; Miranda,Márcio RodriguesAbstract Mercury is a major pollutant in the Amazon River system, and its levels in fish and human hair are usually above the limit recommended by health agencies. The objective of this study was to analyze the methylmercury (MeHg) concentration in fish tissue from the Roosevelt River. The river's water velocity, depth, pH, temperature, electrical conductivity, dissolved oxygen and substrate type were measured,...
Assessment of trace metals in Amazonian fish exposed to untreated urban sewage:...
Sousa,Eduardo Araujo de; Miranda,Márcio Rodrigues; dos Santos,Marília Hauser; Costa Júnior,Walkimar Aleixo; Lauthartte,Leidiane CarolineThe aim of this study was to evaluate the quality of fish meat in relation to inorganic contaminants (Zn, Pb, Cu, Cr, Ni and Hg), following the Brazilian Health Surveillance Agency (ANVISA) standards in five Amazonian fish exposed to untreated urban sewage. Trace metal concentrations were evaluated in the muscle tissues of Schizodon fasciatus (herbivorous), Potamorhina latior (detritivorous), Triportheus angula...
Flood pulse and spatial dynamics of mercury in sediments in Puruzinho lake, Bra...
Almeida,Ronaldo de; Bernardi,José Vicente Elias; Oliveira,Ronaldo Cavalcante; Carvalho,Dario Pires de; Manzatto,Angelo Gilberto; Lacerda,Luiz Drude deThe study was conducted in Puruzinho lake (Humaitá, AM) considering seasonal periods of rainy and dry in way to elucidate the flood pulse importance in the deposition, remobilization and distributions of mercury and organic matter in bottom sediments in the Madeira River Basin (Brazilian Amazon). Bottom sediments and soils samples were analyzed for total mercury and organic matter. Mercury concentrations obtain...
Zumbido em uma população ribeirinha exposta ao metilmercúrio
Cardoso,Nathalia Alves; Hoshino,Ana Cristina Hiromi; Perez,Maurício Andrade; Bastos,Wanderley Rodrigues; Carvalho,Denise Pires deObjetivo : Estudar a prevalência de zumbido, verificando se há associação entre a queixa desse sintoma e o teor de mercúrio e mensurar seu impacto na qualidade de vida. Métodos : Estudo seccional em toda a população do Lago do Puruzinho, localizada na margem esquerda do Rio Madeira, cidade de Humaitá, Estado do Amazonas, Brasil. Todos os residentes maiores de 18 anos, de ambos os gêneros, foram submetidos à ana...
Prevalência de hipertensão arterial em comunidades ribeirinhas do Rio Madeira, ...
Oliveira,Beatriz Fátima Alves de; Mourão,Dennys de Souza; Gomes,Núbia; Costa,Janaina Mara C.; Souza,Andreia Vasconcelos de; Bastos,Wanderley RodriguesO objetivo deste estudo foi estimar a prevalência de hipertensão em adultos residentes nas comunidades ribeirinhas do rio Madeira, previamente à operação da Usina Hidrelétrica Santo Antônio. Estudo transversal da prevalência de hipertensão arterial realizado com 841 adultos. Informações sobre condições sociodemográficas, morbidade referida, hábitos de vida, consumo de peixe e dados antropométricos foram avaliad...
A description of mercury in fishes from the Madeira River Basin, Amazon, Brazil
Bastos,Wanderley Rodrigues; Rebelo,Mauro de Freitas; Fonseca,Márlon de Freitas; Almeida,Ronaldo de; Malm,OlafOver the last 20 years several projects carried on the Madeira River basin in the Amazon produced a great amount data on total Hg concentration in different fish species. In this paper we discuss temporal trends in Hg contamination and its relation to body weight in some of those fishes, showing that even within similar groups, such as carnivorous and non-migratory fish, the interspecies variability in Hg accum...