From left: Duquesne University students Laura Howell, 38, of Pittsburgh, Pa., Maria Wheeler, 22, of Pittsburgh, Pa., Stephanie Dowell, 23, of PIttsburgh, Pa., and Ben Latoche, 21, of Pittsburgh, Pa.,aid Assistant Professor Dr. Brady Porter, 40, of Allison Park, Pa., in studying a small tributary of Turtle Creek in Duff Park, Murrysville, Pa., September 27, 2008. Ben Latoche applies an electric show to the water that renders the fish immobile. Dr Brady Porter and Laura Howell catch the fish with nets while Maria Wheeler and Stephanie Dowell collect what is left with a large net.