1. Centre for Behavioural and Physiological Ecology, Zoology, University of New England, Armidale, Australia
2. Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway
3. Department of Biological Sciences, Arkansas State University, Jonesboro, AR, USA
4. School of Molecular and Life Sciences, Curtin University, Perth, Western Australia
5. School of Natural Sciences and Psychology, Liverpool John Moores University, Byrom Street, Liverpool, UK