1. SUSAN J. REHOREK is a Professor in the Department of Biology, Slippery Rock University of Pennsylvania, Slippery Rock, PA 16057, USA; e-mail: susan.rehorek@sru.edu.
2. NICOLE J. DAFOE is an Associate Professor in the Department of Biology, Slippery Rock University of Pennsylvania, Slippery Rock, PA 16057, USA; e-mail: nicole.dafoe@sru.edu.