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Assessment of mercury contamination in Brycon falcatus (Characiformes: Bryconidae) and human health risk by consumption of this fish from the Teles Pires River, Southern Amazonia Neotropical Ichthyology
Matos,Liliane S. de; Silva,João Otávio S.; Kasper,Daniele; Carvalho,Lucélia N..
ABSTRACT Brycon falcatus is one of the most highly consumed species of fish within the region in the Teles Pires basin, and has great commercial importance in sport and professional artisanal fishing. The objective of this study was to analyze the presence and concentration of total mercury (THg) in the muscle, liver and gills of B. falcatus, and calculate the risk to human health of THg contamination from ingestion of the fish. THg concentrations were similar in the liver (0.076 mg kg-1) and muscle (0.052 mg kg-1), and higher than in the gills (0.009 mg kg-1). The levels of HgT present in B. falcatus tissues did not influence weight gain and nutritional status. Based on the condition factor, weight and length ratio and hepatosomatic index, it seems that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Condition factor; Hepatosomatic index; Matrinxã; Tapajós basin; Weight-length relationship.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100203
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Mercury distribution in different tissues and trophic levels of fish from a tropical reservoir, Brazil Neotropical Ichthyology
Kasper,Daniele; Palermo,Elisabete Fernandes Albuquerque; Dias,Ana Carolina Monteiro Iozzi; Ferreira,Gustavo Luiz; Leitão,Rafael Pereira; Branco,Christina Wyss Castelo; Malm,Olaf.
Concentrations of organic (OrgHg) and inorganic mercury (InorgHg) were assessed in different fish tissues (liver, muscle, kidney, gut and gonads) and trophic levels collected in an impacted tropical reservoir in southeastern Brazil. Organic mercury concentrations in muscle were remarkably higher in the carnivorous species Hoplias malabaricus and Oligosarcus hepsetus. The ratios of OrgHg in relation to total mercury (%OrgHg) in muscle also varied according to the species trophic level: 93% for carnivores, 84% for omnivores, 73% for algivores/planktivores and 58% for detritivores. The %OrgHg in the gut tissue of carnivores (78%) was much higher than that found in omnivores (30%), possibly reflecting a process of trophic biomagnification in the reservoir. On...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding habits; Hydroelectric; Mercury species; Biomagnification; Bioaccumulation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400025
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