ACKNOWLEDGEMENT
We thank all fieldworkers who collected data for this study,
the
island inhabitants, laboratory technician Randi Røsbak (NTNU, Trondheim)
for extracting DNA and genotyping procedures, and Håkon Holand for help
with parentage analyses.
This
work was funded by the Research Council of Norway (Centre for
Biodiversity Dynamics 223257 and
274930). MLP also thanks “Forsknings- og undervisningsfondet i
Trondheim ” for financial support. The study design was subject to
review by the Norwegian Environment Agency (permits
2001/6427-ARTS/VI/ARE and 2004/1671-ARTS-VI-ID) and complied with the
laws of animal welfare in Norway (permits S-2603-01, S-204-8032-1, and
S-2007/1482 from the Norwegian Animal Research Authority and the Bird
Ringing Centre at Museum Stavanger, Norway). The authors have no
conflicts of interest to declare.