Exposure to environmental contaminants. Hg in seafood Acute health effects ( Minimata ) Chronic health effects ( seafood (NY state)) Endocrine disruptors Effects on humans Effects on other animals Long Island Sound data. Heavy Metal Pollution in Water: Pb, As, Hg , Cd, others.
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Heavy Metal Pollution in Water: Pb, As, Hg, Cd, others
Did you know that the Mad Hatter from Alice’s Adventures in Wonderland is modeled after an occupational disease of the 18th and 19th centuries? In that era, hat makers were heavily exposed to mercury used in the preparation of felt. Consequently, many suffered brain damage and became psychotic, or “mad” (Katy, 1979).
Top predators and older, slow growing fish have high MeHg concentrations.
Exposure route: sediments to fish to consumers
Minimata Disease, 1956
Over 2,000 victims
Source: acetaldehyde factory
~25-30 tons released
Exact mechanism of action not really known
(3x the national average (0.83 µg/L)
(McKelvey et al. 2007)
“Women who might become pregnant, women who are pregnant, nursing mothers, and young children”.
2. “all fish and shellfish contain . . . mercury . . . those that contain higher levels . . . may harm an unborn baby or young child's developing nervous system”
Estimated EPA/DHA and MeHg intake from one and two 3-ounce servings of seafood.
Hayes et al., 2002
Schmitt et al., 2005
Largemouth bass testes from Rio Grande
Arukwe and Goksoyr, 2003
Water Quality Index
dissolved inorganic nitrogen, dissolved inorganic phosphorus, chlorophyll a, water clarity, and dissolved