1. Department Biology II, Zoology; Ludwig-Maximilians-University; Großhaderner Strasse 2, 82152 Planegg-Martinsried Germany
2. Department of Behavioural Biology; University of Vienna; Althanstrasse 14, 1090 Vienna Austria
3. College of Animal Science & Technology; Northwest A&F University; 22 Xinong Road, Yangling Shaanxi China