Copper, zinc, mercury and arsenic content in Micropogonias furnieri and Mugil platanus of the Montevideo coastal zone, Río de la Plata

Abstract

57Copper, zinc, mercury and arsenic content in Micropogonias furnieri and Mugil platanus of the Montevideo coastal zone, Río de la Plata Metals (Cu, Zn, Hg) and metalloid (As) concentrations were measured in Micropogonias furnieri and Mugil platanus caught in three areas along the Montevideo coastal zone during winter 2010, spring 2010 and 2011. Compared to previous studies conducted in the zone, both species showed higher (for Cu), similar (for Zn) or lower (for Hg) concentrations. The highest Hg values were found in the M. furnieri of Montevideo bay. There was no spatial variation in Cu, Zn, and As concentrations in muscle, likely due to the high mobility of both species. However, the Cu content in the liver of M. furnieri was higher in fish from the West zone. Cu, Zn and As found in the liver of M. platanus were much higher than in that of M. furnieri. A functional relationship between muscle levels of Zn and Hg and fish length of M. furnieri indicates bioaccumulation of these metals. According to the results, M. furnieri may be used as a temporal bioindicator for Hg, but not as a spatial bioindicator. Mercury levels were below the maximum safety level based on international standard values for human consumption. AbstrAct

Metal bioavailability and distribution in the fish community in a tropical estuary, Sepetiba Bay, Rio de Janeiro, Brazil

“…Higher As concentrations in the sediments were reported in Sepetiba Bay (MAGALHÃES et al, 2001). The mean As concentration in tissue observed in the present study for M. furnieri (1.0 µg.g -1 w.w) was close to that reported in estuaries from South America (south-eastern Brazil 1.2 µg g -1 w.w. (MEDEIROS et al, 2012) and Uruguay (1.2 µg g -1 w.w. (CORRALES et al, 2016)). The C. spixii species from Sepetiba (1.2 µg g -1 w.w.) presented half of the As concentration found in this species from Paranaguá (3.4 µg g -1 w.w.) (southeastern Brazil) (ANGELI et al, 2013).…”

Neutron Activation Analysis characterization procedures for fish consumed at São Paulo City

“…Inorganic contaminants are present in the aquatic environment, coming from natural and anthropogenic sources. The problematic of these contaminants occurs by the following steps: inorganic contaminants are present in the sediment, which provides habitat and food for benthos and fish, bioaccumulation and biomagnification may exist from food web relationships [4,5] and humans can be exposed to the inorganic contaminants by feeding on fishes [6].…”

Determinação de contaminantes inorgânicos em pescados consumidos em São Paulo como contribuição à garantia da segurança alimentar

“…Os contaminantes inorgânicos presentes no ambiente aquático se originam de fontes naturais e antropogênicas (CORRALES et al, 2016). Esses elementos possuem persistência no meio-ambiente (GU et al, 2015), ou seja, não são eliminados pelas instalações de saneamento ou pela capacidade de autopurificação da natureza (JIN et al, 2012).…”

“…Os contaminantes inorgânicos são inertes e se depositam nos sedimentos, esses por sua vez fornecem habitat e alimento para peixes e bentos, podendo haver assim bioacumulação e biomagnificação dos contaminantes presentes no corpo d´água e no sedimento para os organismos por meio de suas relações alimentares (YI et al, 2017;CORRALES et al, 2016).…”

“…Esta variação de fração mássica dos elementos determinados nos espécimes de pescado, principalmente para os contaminantes é considerada comum, uma vez que a acumulação depende de fatores como teor de gorduras, tamanho, idade, gênero, nível do elemento no ambiente, forma química do contaminante e tempo de exposição (FDA, 2011;CORRALES et al, 2016). Br (mg kg -1 ) 250 ± 50 (248 ± 42) i 0,13 52,7 ± 4,8 (SV) -Cl (%) 3,763 ± 0,098 (3,69 ± 0,57) 0,58 0,495 ± 0,013 (0,514 ± 0,010) -0,83 K (%) 0,90 ± 0,14 (0,82 ± 0,13) 2,0 0,635 ± 0,031 (0,652 ± 0,009) -0,58 Mg (%) 0,427 ± 0,038 (0,373 ± 0,056) 2,7 0,1118 ± 0,0088 (0,1085 ± 0,0023) 0,51…”