Author Affiliations +
Jan T. Lifjeld,1,* Christian K. Aas,1 Tim R. Birkhead,2 Fiona Fletcher,2 Christin Krokene,1 Kari Rigstad1,**
1aZoological Museum, University of Oslo, Sars gate 1, N-0562 Oslo, Norway
2bDepartment of Animal and Plant Sciences, The University of Sheffield, Sheffield S10 2TN, United Kin
*j.t.lifjeld@toyen.uio.no
**Present address: Department of Zoology, Göteborg University, Box 463, SE-405 30, Göteborg, Sweden.