Lorelei Crerar1, E C M Parsons2, Daryl Domning3. 1. Biology, George Mason University, 4400 University Drive, Exploratory Hall 1218, MSN: 3E1, Fairfax, VA, USA lcrerar@gmu.edu. 2. Environmental Science and Policy, George Mason University, 4400 University Drive, Exploratory Hall 1218, MSN: 3E1, Fairfax, VA, USA. 3. Anatomy, Howard University, 520 W Street NW, Washington, DC, USA.