Mercury species in fish from a tropical river highly impacted by gold mining at the Colombian Pacific region

Metal and metalloid concentrations in marine fish marketed in Salvador, BA, northeastern Brazil, and associated human health risks

“…The tendency showed in the present work (Fig. 2) corroborates with other studies in literature, the highest concentrations of metals occurring in species of higher trophic level, so the metal content of herbivorous fish is generally lower than that of carnivorous and piscivore such like tunas and mackerel (Salazar-Camacho et al, 2020;Miao et al, 2020;Storelli et al, 2020).…”

Health Risk Assessment for Human Exposure to Heavy Metals via Food Consumption in Inhabitants of Middle Basin of the Atrato River in the Colombian Pacific

“…However, the municipality of Vigía del Fuerte had a greater number of species with high concentrations, including C. kraussii, R. quelen, C. beani, H. malabaricus, P. schultzi, C. atratoensis, S. aequilabiatus, T. fisheri, and A. pardalis. These areas are characterized by extensive mining activities on the Murrí River and other tributaries [21]. In the Atrato river basin, other studies reported similar data for A. pardalis, H. malabaricus, and C. beani; the observed concentrations were related to extractive mining of the Atrato river and its tributaries [9,21].…”

“…These areas are characterized by extensive mining activities on the Murrí River and other tributaries [21]. In the Atrato river basin, other studies reported similar data for A. pardalis, H. malabaricus, and C. beani; the observed concentrations were related to extractive mining of the Atrato river and its tributaries [9,21]. The high concentrations of THg found were consistent with observations by Vargas-Licona and Marrugo-Negrete [70] who warned about the toxicological risk due to mining in some ecosystems in Colombia.…”

“…In Colombia, some investigations have reported high concentrations of these metals in fish commonly consumed in various communities; in addition, assessments of risk associated with the consumption of fish contaminated by heavy metals have been undertaken [18,19]. In the Colombian Pacific, Hg, Cd, Pb, and MeHg in fish from the Atrato river basin have been reported in high concentrations, particularly in fish with carnivorous habits [8,9,20,21]. In addition, Salazar-Camacho et al [8] carried out a risk assessment of the consumption of fish in relation to levels of Hg, Cd, Pb, and MeHg in the riverside population of the Atrato River basin.…”

Mercurio total (Hg-T) en ictiofauna de mayor consumo en San Marcos - Sucre, Colombia

“…Los niveles más altos de Hg-T fueron cuantificados en las especies con hábitos carnívoros, lo que puede deberse a que se alimentan de peces más pequeños y a que estas especies ocupan eslabones altos en las redes tróficas de los cuerpos de agua que habitan (7), lo que propicia que metales pesados como el mercurio se bioacumulen y biomagnifiquen de forma más eficiente y significativa (21,22). Por otra parte, los niveles más bajos de Hg-T se registraron en peces detrívoros presentando hábitos fitoplanctónicos indirectos, lo cual podría explicar la menor tasa de bioacumulación de mercurio en el musculo dorsal (23).…”