1. Laboratory of Evolutionary Genetics, Institute of Molecular Biology and Medicine, Free University of Brussels, Cp 300, Rue Jeener and Brachet 12, B–6041 Gosselies, Belgium
2. College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210, USA
3. Charles Darwin Foundation, Puerto Ayora, Galápagos Islands, Ecuador
4. Galápagos National Park Service, Puerto Ayora, Galápagos Islands, Ecuador
5. Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA
6. Institute for Biochemistry and Biology, University of Potsdam, Karl-Liebknecht–Strasse 24–25, Haus 25, D–14476 Potsdam, Germany
7. Department of Ecology and Evolutionary Biology, Yale Institute for Biospherics Studies ECOSAVE, Yale University, New Haven, CT 06520–8106, USA