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               'Fish Thermometer' Reveal Impact of Climate Change

   by VOA News

   While much of the discussion about climate change focuses on the threat
   of future sea level rise, scientists at the University of British
   Columbia [1]say warmer global temperatures have been affecting the
   world's oceans and fisheries for some 40 years.
   They used known temperature preferences of fish and other marine
   species as a sort of "thermometer" to gauge the extent of the change,
   and they saw a gradual migration of fish species away from the equator
   into cooler, deeper waters.
   The researchers analyzed data from global fisheries from 1970 to 2006
   and found the catch was increasingly dominated by warm-water species.
   Lead author William Cheung notes that while boats off the northeastern
   coast of the U.S. were catching new species typically found closer to
   the tropics, "in the tropics, climate change meant fewer marine species
   and reduced catches, with serious implications for food security."
   The study of the changes in fish distribution worldwide as a result of
   climate change is published in this [2]month's Nature.
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   [3]http://www.voanews.com/content/fish-thermometer-reveals-longstanding
   -global-impact-of-climate-change/1661657.html

References

   1. http://www.pewenvironment.org/news-room/fact-sheets/warming-oceans-are-reshaping-fisheries-85899475142
   2. http://www.nature.com/nature/journal/v497/n7449/full/nature12156.html
   3. http://www.voanews.com/content/fish-thermometer-reveals-longstanding-global-impact-of-climate-change/1661657.html