Critical review of mercury contamination in Sri Lankan fish and aquatic products

Metal Contents in Fish from the Bay of Bengal and Potential Consumer Exposure—The EAF-Nansen Programme

“…The one species of barracuda (Sphyraena jello) included in this study contained a considerably higher content of mercury compared to all the other fish species (0.348 mg/kg) and was also substantially larger than the other species (88.5 cm). In a review article on mercury content in fish from Sri Lanka, reported that most fish species were below the maximum limit, except for certain top-trophic-level fish species (swordfish, tuna, and marlin) [13]. In this study, Sphyraena jello was the only species to exceed the PTWI for MeHg if consumed every day by adults and children for a week.…”

“…Major sources of marine pollution in the Bay of Bengal include industrial, agrochemical, and municipal wastes, in addition to oil pollution. Furthermore, the many large rivers flowing into the Bay of Bengal, including the Ganges, the Mahanadi, and the Krishna, are substantial carriers of domestic and industrial waste into the coastal and marine waters in the Bay, as proper waste disposal facilities are lacking in the surrounding countries [13,31]. Because many fish species occupy high trophic levels in the food chain, they are considered good bioindicators of pollutants in the aquatic environment and represent a good monitoring tool to assess changes in the environment [32][33][34].…”

“…Metal pollution of the aquatic environment may derive from anthropogenic activities, such as industrial processes and industrial waste, mining and smelting operations, and domestic and agricultural use of metals and metal-containing compounds, as well as a result of natural phenomena, such as volcanic eruptions and weathering [8][9][10][11]. As developing countries, both Sri Lanka and Bangladesh are at higher risk of metal pollution of the aquatic environment as a consequence of rapid urbanisation and industrialisation [12][13][14]. Heavy metals (such as cadmium, mercury, and lead) and metalloids (such as arsenic), Table 1.…”

Vector field techniques for the detection of neuronal dynamics in the presence of mercury

“…The production of aquatic environments that simulate known freshwater and oceanic or marine environments with an arbitrarily high complexity of composition reproduction does not present significant technical problems at the moment -up to models that include microbiological components, fluid models for specific geographical locations, specific exposure levels -imitating the photochemistry and photohydrochemistry of mercury and the presence of specific dissolved or precipitated forms, etc. (Regnell and Watras, 2018;Zhu et al, 2018;Jinadasa and Fowler, 2019;Kimáková et al, 2019;Yan et al, 2019;Luo et al, 2020;Branfireun et al, 2020;Helmrich et al, 2021;Gallorini and Loizeau, 2021). Moreover, in the presence of modern models that reconstruct trends (which is a consequence of the analysis of "big data" about natural ecosystems), not only reconstruction is available for known environmental conditions, but also for arbitrary conditions for which a plausible calculation of the state in computational models is possible.…”

“…Analyzing recent literature (because the author has not studied the nervous tissues of fish since 2015 (Gradov, 2015), due to the lack of equipment and infrastructural capabilities to maintain them), we came to a paradoxical, in fact, conclusion. Despite the increase in works postulating the toxic effect of mercury demonstrated on fish (up to its toxicokinetics and biotransformation at various stages of this effect) and works postulating mercury contamination under various hydrochemical conditions (Zheng et al, 2019;Jinadasa and Fowler, 2019;Wang and Wang, 2019;Mendes et al, 2019;Lahrich and El ABSTRACT. The role of mercury in the development of various neuropathologies is well known.…”