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Ocean fish acquire more mercury at depth
Date:8/25/2013

l mercury emissions.

"In the next few decades there will be changes in mercury concentrations in the Pacific Ocean, and those changes are likely to be different for surface waters than for deep waters," Popp said. "Understanding the competing processes that produce and destroy monomethlylmercury at different depths in the ocean is critical to tracing its bioaccumulation in fishes and the potential consequences for human food supply."

Blum led the effort to very precisely measure the ratios of the stable isotopes of mercury, relying on techniques his lab has developed to take advantage of a natural phenomenon called isotopic fractionation. Popp and Drazen led the Hawai'i group that sampled fish at various depths, measured the total amount of mercury in their muscle tissues, and determined their position in the marine food web.


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Contact: Talia S Ogliore
togliore@hawaii.edu
808-956-4531
University of Hawaii at Manoa
Source:Eurekalert

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