Total mercury and mercury species in birds and fish in an aquatic ecosystem in the Czech Republic

Mercury distribution in muscles and internal organs of the juvenile and adult Baltic cod (Gadus morrhua callarias Linnaeus, 1758)

“…Mercury in predatory fish mainly occurs in the form of methyl mercury, which accounts for 80 -90% of total mercury present (Boudou and Ribeyre 1983, Houserova et al 2007, Kasper et al 2009). Many factors influence the concentration and distribution of mercury in the tissues and organs, including trophic level, feeding habits, metabolic rate (Kasper et al 2009, Leaner andMason 2004), and structural and physiological features of each species which may change mercury distribution under similar exposure conditions (Falkowska et al 2010, Kasper et al 2009).…”

Mercury in Different Tissues of Grey Herons (Ardea cinerea) from the Volta Lake, Ghana

“…Feathers are among the most attractive tissue to monitor, because they are considered as the main route for Hg elimination [14]. Mercury accumulation in piscivorous birds has extensively being studied in the past [15][16][17][18], but to the best of our knowledge data on mercury contamination in different tissues of grey herons from the Volta Lake, Ghana is lacking. This work is aiming to evaluate the residual accumulation of mercury in different tissues of grey heron's in Ghana.…”

Mercury Biomagnification between Two Trophic Levels of a Grazing Food Chain (Plankton and Planktivorous Fish) in a Fresh Water Ecosystem

“…When fish biometric procedure was done, 10 gr of muscle tissue was separated from each fish and samples were frozen at -20 °C in small plastic bags until measurement of T-Hg [24]. Methylmercury is a volatile component, therefore, to prevent methylmercury evaporation, all samples were dried out using a freeze-dryer (OPERON, Model; FDCF -12012) in -52 0 C. Freeze-drying was preformed until constant weight obtained [18].…”

“…After samples freeze drying, homogenized solid tissue, with a weight of 50-100 ± 0.01 mg, was separated into the pre-cleaned combustion boats from the original dried tissue samples and THg concentrations were determined by Advanced Mercury Analyzer (Model; LECO AMA 254, USA), [18] in the environmental laboratory of Tarbiat Modares University, with ASTM D-6722 standard on the basis of ng g -1 dry weight (dry wt).…”

“…Assessing and determining Hg contamination in basic trophic levels could provide a comprehensive description of pollution at higher trophic levels (especially in the food chains that i involves humans) [17]. Mercury biomagnification is a prevalent phenomenon in aquatic environments particularly in fresh water ecosystems [2,17,18]. Biomanification refers to a condition that concentration of a pollutant in living organism's tissues increases from one trophic level to the next one [2].…”