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horchata12345 horchata12345
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7 years ago
In 1956, people in Minamata, Japan, began to exhibit severe neurological disorders and birth defects. This problem was eventually attributed to methylmercury, a water-insoluble and breakdown-resistant chemical formed from mercury dumped into the adjacent bay by a local factory. Which of the following types of seafood would have the highest levels of methylmercury, and therefore cause the severest effects?


A.  Kelp (large, multicellular, photosynthetic protists)
B.  Tuna that feed on smaller fish that feed on krill that feed on algae
C.  Krill (small crustaceans that eat tiny microscopic algae)
D.  Mussels that feed on tiny microscopic algae
E.  Sea urchins that feed on kelp


An educated guess would be mussels.  But not sure
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wrote...
Valued Member
Educator
7 years ago
tuna that feed on smaller fish that feed on krill that feed on algae
horchata12345 Author
wrote...
7 years ago
That is the answer they want us to give. 
What is the rationale?  To me, it's  that the further along the food chain the more concentrated the MeHg





Source  http://www.ncbi.nlm.nih.gov/pubmed/7734058
wrote...
Valued Member
Educator
7 years ago
It has to do with bioamplification


horchata12345 Author
wrote...
7 years ago
Thank you!
I was going round and round with it,  the research paper stated shellfish and fish,  so now I have more of a sense of how and why.
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