1. Center for Environmental and Human Toxicology, Department of Physiological Sciences, University of Florida, Gainesville, Florida 32611, USA
2. USGS/Florida Integrated Science Center/Center for Aquatic Resource Studies, Gainesville, Florida 32653, USA
3. USGS Northern Appalachian Research Laboratory, Wellsboro, Pennsylvania 16901, USA
4. Florida Fish and Wildlife Conservation Commission, Eustis Fisheries Research, Laboratory, Eustis, Florida 32726, USA