Here was my research:
From a 1971 population-based investigation, data from 2 villages were selected: Minamata (high-exposure area;n= 779) and Ariake (low-exposure area;n= 755). The authors examined the prevalence of neurologic signs characteristic of methylmercury poisoning and the validity of the criteria. A substantial number of residents in the exposed area exhibited neurologic signs even after excluding officially certified patients.
Mercury levels in selected fish and shellfish
VERY LOW
Shrimp
Salmon
BELOW AVERAGE
Crabs
Catfish
ABOVE AVERAGE
Cod
Canned light tuna
MODERATELY HIGH
Halibut
American lobster
HIGH
Grouper
Canned/Albacore tuna
VERY HIGH
Swordfish
Tuna sushi/Bluefin tuna
Shrimp
Salmon
BELOW AVERAGE
Crabs
Catfish
ABOVE AVERAGE
Cod
Canned light tuna
MODERATELY HIGH
Halibut
American lobster
HIGH
Grouper
Canned/Albacore tuna
VERY HIGH
Swordfish
Tuna sushi/Bluefin tuna
*Dolphins eat tuna therefore when the whalers/fishermen slaughter them for meat they don't realize they become
highly intoxicated with mercury since it eats from the food chain down-upward.
source:
Works Cited
"Science Stats." Science News 177.11 (2010): 4. Consumer Health Complete - EBSCOhost. Web. 5 Aug. 2013.
From 1932 to 1968, Chisso Corporation, a local petrochemical and plastics maker, dumped an estimated 27 tons of mercury into Minamata bay, poisoning fish and eventually, the people who ate them.
McCurry, Justin. "Japan Remembers Minamata." Lancet 367.9505 (2006): 99-100. Consumer Health Complete - EBSCOhost. Web. 5 Aug. 2013.