A man attempting to cheat his way into a $500 prize for catching a hefty Chinook linkurl:salmon;http://www.the-scientist.com/article/display/12212/ was recently foiled by one of the most basic tenets of fisheries biology: if you know a fish's length, you can pretty accurately predict its weight. You see, a primary tool that fisheries biologists use to assess the health or habitat quality of different fish species or populations is what they call a linkurl:length-weight regression.;http://www.michigandnr.com/PUBLICATIONS/PDFS/ifr/manual/SMII%20Chapter17.pdf The established, mathematic relationship between length and weight in a particular fish species can tell a biologist a lot about the condition of an individual member of that species. I guess Canadian fisherman Norval Boufford wasn't counting on that on May 13, when he hauled an abnormally bulky salmon to a weigh-in station in St. Catharines, Ontario. Boufford was angling for the $500 prize given to the largest fish of the day during the annual linkurl:Salmon Masters Derby;http://www.salmonmastersderby.com/index.php...

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