1. I. C. T. Nisbet & Company; North Falmouth MA 02556 USA
2. Department of Life Sciences; MARE − Marine and Environmental Sciences Centre; Universidade de Coimbra; 3004-517 Coimbra Portugal
3. USGS Patuxent Wildlife Research Center; Laurel MD 20708 USA
4. Eastern Connecticut State University; Willimantic CT 06226 USA