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Thread: Mercury in fish

  1. #1
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    Mercury in fish

    I ran into this story about mercury in fish in Japan in the 1950's.

    It started out quite simply, with the strangeness of cats "dancing" in the street--and sometimes collapsing and dying. Who would have known, in a modest Japanese fishing village in the 1950s, that when friends or family members occasionally shouted uncontrollably, slurred their speech, or dropped their chopsticks at dinner, that one was witnessing the subtle early symptoms of a debilitating nervous condition caused by ingesting mercury? Yet when such scattered, apparently unconnected, and mildly mysterious events began to haunt the town of Minamata, Japan, they were the first signs of one of the most dramatic and emotionally moving cases of industrial pollution in history.The outcome was tragic: a whole town was both literally and figuratively poisoned. Yet for those of us, now, who can view it more distantly, this episode also offers a conceptually clear and affectively powerful example of the concentration of elements in food chains, the sometimes unexpected interconnectedness of humans and their environment, and the complex interactions of biology and culture. In short, it is a paradigm for teaching ecology and science-society issues.

    The case of Minamata, Japan, and the mercury poisoning (originally called Minamata disease) that took place there, appeared briefly in news headlines in the 1970s and then receded from public attention--at least in the U.S. The episode was fully and richly documented, however, by former Life photographer, Eugene Smith, and his wife, Aileen, who lived in Minamata for several years. Much of what follows draws on their book (unfortunately, now out-of-print, but available in many libraries; see Smith and Smith 1972, 1975; Ishimure 1990).






    . In 1932 the Chisso Corporation, an integral part of the local economy since 1907, began to manufacture acetaldehyde, used to produce plastics. As we know now, mercury from the production process began to spill into the bay. Though no one knew until decades later, the heavy metal became incorporated into methyl mercury chloride: an organic form that could enter the food chain. At the time, Minamata residents relied almost exclusively on fish and shellfish from the bay as a source of protein. For us, today, the threat of pollution is immediately evident. But one must not fail to appreciate the historical context in which neither scientific experience nor a pervasive environmental awareness could offer such an explicit warning.
    The Poisoning of Minamata

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    The problem with "better living through chemistry" proved that the "solution to pollution is dilution" doesn't work in a food chain, that the pollutant will accumulate into ever increasing levels as it makes it way up the food chain.

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    Quote Originally Posted by Publius View Post
    The problem with "better living through chemistry" proved that the "solution to pollution is dilution" doesn't work in a food chain, that the pollutant will accumulate into ever increasing levels as it makes it way up the food chain.
    That never made any sense to me. They act like the ocean can just absorb anything. I worry about us not realizing the damage we've done until it's too late.

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    Quote Originally Posted by Blueneck View Post
    That never made any sense to me. They act like the ocean can just absorb anything. I worry about us not realizing the damage we've done until it's too late.
    Well that is because if they dump it into a large enough body of water, the concentration of the stuff is low enough that, assuming it wasn't salty, you'd probably be able to drink it. I think the whales are a good example because you can liken it to a Brita water filter. The whales filter large volumes of water to catch the krill and this slowly accumulates the pollutant in a manner shockingly similar to how a Brita water filter slowly gets clogged. The problem is that the chemists weren't biologists.

    Furthermore, on top of that, there are situations where we have little choice but to rely on that solution. Human wastes are an excellent example. No matter how we slice it a population of a small town, 5,000 people is going to produce a ton of s---- EVERY DAY. Of course, the biosphere can break that down, whereas it can't do anything with mercury....chromium....etc

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    Quote Originally Posted by Publius View Post
    Well that is because if they dump it into a large enough body of water, the concentration of the stuff is low enough that, assuming it wasn't salty, you'd probably be able to drink it. I think the whales are a good example because you can liken it to a Brita water filter. The whales filter large volumes of water to catch the krill and this slowly accumulates the pollutant in a manner shockingly similar to how a Brita water filter slowly gets clogged. The problem is that the chemists weren't biologists.

    Furthermore, on top of that, there are situations where we have little choice but to rely on that solution. Human wastes are an excellent example. No matter how we slice it a population of a small town, 5,000 people is going to produce a ton of s---- EVERY DAY. Of course, the biosphere can break that down, whereas it can't do anything with mercury....chromium....etc
    Well, we do treat the sewage now. And slowly cities are separating sewage from runoff, hopefully this will gradually get better.

    I grew up in Imperial Beach, where the beaches were closed much of the time due to Tijuana's dumping of raw sewage into the ocean.

    They finally built a treatment plant, but due to it failing quite often, the problem isn't really solved.

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    I read about this a while ago...the story I read had alot more of the human effects of the mercury...it was horrific.
    I just read how filthy farm raised tilapia is from China...actually all farm raised fish from china...filthy water, containers too small for the number of fish full of fecal matter etc....turned my stomach...its a good thing we really know the route what we put in our mouths takes to get to us

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    Quote Originally Posted by lpast View Post
    I read about this a while ago...the story I read had alot more of the human effects of the mercury...it was horrific.
    I just read how filthy farm raised tilapia is from China...actually all farm raised fish from china...filthy water, containers too small for the number of fish full of fecal matter etc....turned my stomach...its a good thing we really know the route what we put in our mouths takes to get to us
    China freaks me out on a bunch of levels. The air pollution there is unbelievable. They're building coal fired power plants at an alarming rate and just announce they are building the largest one ever in Asia.

    China plans Asia's largest coal-fired power plant | MNN - Mother Nature Network

    They keep this up and coal futures will be the next bubble and yes, I do believe it will affect us greatly here in the US. The upside would be if coal becomes scarce and expensive over there it could end up bringing some of our manufacturing back home.

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    Quote Originally Posted by Blueneck View Post
    China freaks me out on a bunch of levels. The air pollution there is unbelievable. They're building coal fired power plants at an alarming rate and just announce they are building the largest one ever in Asia.

    China plans Asia's largest coal-fired power plant | MNN - Mother Nature Network

    They keep this up and coal futures will be the next bubble and yes, I do believe it will affect us greatly here in the US. The upside would be if coal becomes scarce and expensive over there it could end up bringing some of our manufacturing back home.

    I looked for it and cant find it now...guess it was about two weeks ago...I was reading that China is close to a tipping point for our corporations..where its not going to be worthwhile to manufacture there and ship it...chinese workers are getting smarter...and demanding more...if its accurate the article said your going to see a big move to Latin america...chile, etc....that will be the next frontier.

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