Trout Unlimited researchers say the parasite thrives in polluted rivers and in warmer summer temperatures. Now, scientists hope to get trout to spawn earlier in the year, before fish are at the greatest risk of infection.
For a free copy of the 36-page Whirling Disease in the U.S., write Trout Unlimited, 1500 Wilson Blvd., Suite 310, Arlington, VA 22209-2404, or download the report from www.tu.org/library/conservation.html.
* Rebecca Clarren
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