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Title: Debating over Krill, Mussels or Kelp? History shows shellfish was the culprit Post by: horchata12345 on Jul 15, 2016 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 Title: Re: Debating over Krill, Mussels or Kelp? History shows shellfish was the culprit Post by: bio_man on Jul 15, 2016 tuna that feed on smaller fish that feed on krill that feed on algae
Title: Re: Debating over Krill, Mussels or Kelp? History shows shellfish was the culprit Post by: horchata12345 on Jul 15, 2016 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 Title: Re: Debating over Krill, Mussels or Kelp? History shows shellfish was the culprit Post by: bio_man on Jul 16, 2016 It has to do with bioamplification
(https://biology-forums.com/gallery/47/6_16_07_16_1_43_10.png) (https://biology-forums.com/index.php?action=gallery;sa=view&id=23687) Title: Re: Debating over Krill, Mussels or Kelp? History shows shellfish was the culprit Post by: horchata12345 on Jul 22, 2016 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. |