fish species en As Drought Drags On, Fish Species Are Disappearing <p>A Kansas State University researcher says the prolonged North American drought is taking a toll on some species of fish and affecting their long-term viability.<br><br>Biology professor Keith Gido says a few species have disappeared, including the silver chub that was once found in a southern Kansas river.<br><br>He said a survey found 300 of the fish in the summer of 2011 but only three in 2012 - and none in a sampling this spring.<br> Fri, 07 Jun 2013 11:22:13 +0000 Associated Press 18488 at