Consulta: creatorFacets:"Ferreira,Alexandre Gomes"
Registros recuperados: 2
Data/hora: 02/06/2024 16:05:23

Total mercury in the night shark, Carcharhinus signatus in the western equatorial Atlantic Ocean
Provedor de dados: 52
Autores: Ferreira,Alexandre Gomes; Faria,Vicente Vieira; Carvalho,Carlos Euardo Veiga de; Lessa,Rosangela Paula Teixeira; Silva,Francisco Marcante Santana da.
Mercury is the only element capable to biomagnificate along the food chain, and carnivorous fish tend to accumulate high concentrations of this element. Total mercury in muscle tissue of Carcharhinus signatus sampled along the western equatorial Atlantic Ocean was measured by atomic emission spectrophotometry with ICP/AES. The average total mercury concentrations were consistently greater than the maximum limit for human consumption established by the Brazilian Health Ministry for carnivorous fishes (1000 µg. kg-1 w.w.). Therefore, an average consumption of 0.1 kg/day of C. signatus would result in an average daily ingestion of 174.2 µg of Hg, more than five times the 30 µg/day intake established by the World Health Organization. In the range of lengths...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mercury; Shark; Carcharhinus signatus; Southwestern Atlantic Ocean.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400016

Temporal and spatial variation on heavy metal concentrations in the bivalve Perna perna (LINNAEUS, 1758) on the northern coast of Rio de Janeiro State, Brazil
Provedor de dados: 52
Autores: Ferreira,Alexandre Gomes; Machado,André Luís dos Santos; Zalmon,Ilana Rosental.
Heavy metal (Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) concentrations were studied in Perna perna from three beaches (Barra do Furado, Buena and Ponta do Retiro) on the northern coast of Rio de Janeiro State by ICP-AES. The average concentration was 0.3 ± 0.04 (Cd); 1.9 ± 0.6 (Cr); 6.1 ± 0.7 (Cu); 1,130 ± 113 (Fe); 22 ± 3.2 (Mn); 9.3 ± 4.6 (Ni); 0.4 ± 0.2 (Pb); 44 ± 5.8 (Zn) µg.g-1 dry weight. There were no significant difference for almost all the studied metals in relation to sex. Although, significant spatial variations (p &lt; 0.05) occurred for Cr, Pb and Ni with higher values for Barra do Furado. Temporal variations were significant (p &lt; 0.05) at the three beaches, however, no trends of accumulation were observed. The metal concentrations were similar to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metals; Mollusk; Spatial variation; Temporal variation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200020