Distribution of mercury species in different tissues and trophic levels of commonly consumed fish species from the south Bay of Biscay (France)

Mercury abatement in the environment: Insights from industrial emissions and fates in the environment

“…For investigation involving Hake, red mullet, and Sole, which are carnivores, omnivores, and herbivores, respectively, the former had the highest nitrogen isotopic rations. This was consistent with the relative trophic position of the three fish species [ 138 ]. Three isotopes of Hg, including 202 Hg, 199 Hg, and 200 Hg, provide fingerprints of Hg sources in aquatic sediments [ 142 ].…”

“…In a systemic review, turtles' scute tissues from the South Atlantic Ocean had the highest Hg concentrations, implying the most contamination [ 67 ]. Elsewhere, the concentration of total Hg in 86 out of 90 fish muscles exceeded EU food safety regulations [ 138 ]. For individual fishes, Hg content was proportional to size and weight, with functional proteins in the muscles, livers, and gonads of three common fish species, including Merluccius merluccius , Mullus surmuletus , and Solea solea having the highest concentrations.…”

“…Specifically, the average masses of MeHg in the muscles of the three species were 177 ng g −1 , 235 ng g −1 , and 87 ng g −1 ; in the liver, they were 73 ng g −1 , 225 ng g −1 , and 66 ng g −1 ; in the gonads, they were 41 ng g −1 , 67 ng g −1 , and 20 ng g −1 respectively. High metabolic activity in the liver for detoxication causes it to accumulate more Hg than other organs [ 138 ]. For some apex predators, such as the polar bear, the kidney is a more critical organ for the deposition of Hg than the liver and muscles.…”

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). Particularmente, especies como L. muyscorum presenta hábitos alimenticios omnívoros con tendencia herbívora (24).…”