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The fish stocks living around Lake Edward, in turn are also declining. Yes, in turn -- because hippo dung provides vital nutrients for fish. The most recent survey shows there are now less than 600 left, as compared to almost 10,000 hippos that once swam in the lake. The hippo meat, in times of trouble, has become a valuable commodity, selling for 25 to 50 U.S. cents a pound (U.S. $0.55 to $1.10 a kilogram) on the black market. And hippo canine teeth often end up as part of the illegal ivory trade.
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