Long-term decline and geographical variation in the numbers of moulting Common Eiders Somateria mollissima in Shetland

References

• Aldará, J. & Jensen, J.-K. 2019. Gongdin hjá æðu, teista og heiðafugli í Nólsoy. FRØÐI 2/2019, Tórshavn.
   Google Scholar
• Birdlife International. 2021. Somateria mollissima. The IUCN Red List of Threatened Species, 2021. www.iucnredlist.org/species/22680405/166206891.
   Google Scholar
• Bjørnås, K.L. 2017. Population trends of breeding birds along the Swedish coast. MSc Thesis, Faculty of Science, University of Lund.
   Google Scholar
• British Trust for Ornithology Online Data. 2021. Wetland Bird Survey: indices and trends download, Eider – UK annual population index. British Trust for Ornithology, Thetford. https://www.bto.org/our-science/projects/wetland-bird-survey/publications/webs-annual-report.
   Google Scholar
• Camphuysen, K. & Heubeck, M. 2016. Beached bird surveys in the North Sea as an instrument to measure levels of chronic oil pollution. In Carpenter, A. (ed) Oil Pollution in the North Sea, 193–208. Springer International Publishing, Cham.
   Google Scholar
• Dunnet, G.M. & Heubeck, M. 1995. The monitoring of breeding seabirds and Eider. Proceedings of the Royal Society of Edinburgh 103: 137–164.
   Google Scholar
• Durinck, J., Skov, H., Jensen, F.P. & Pihl, S. 1994. Important Marine Areas for Wintering Birds in the Baltic Sea, Report to the European Commission. National Environmental Research Institute, Copenhagen.
   Google Scholar
• Ekroos, J., Fox, A.D., Christensen, T.K., Petersen, I,K, Kilpi, M., Jónsson, J.E., Green, M., Laursen, K., Cervencl, A., Boer, P., Nilsson, L., Meissner, W., Garthe, S. & Öst, M. 2012. Declines amongst breeding Eider Somateria mollissima numbers in the Baltic/Wadden Sea flyway. Ornis Fenn. 89: 81–90.
   Web of Science ®Google Scholar
• Foxton, P. & Heubeck, M. 1995. Response to the Esso Bernicia oil spill. Proc. Roy. Soc. Edinburgh 103B: 233–245.
   Google Scholar
• Furness, R.W., Mable, B., Savory, F., Griffiths, K., Baillie, S.R. & Heubeck, M. 2010. Subspecies status of Common Eider Somateria mollissima in Shetland based on morphology and DNA. Bird Study 57: 330–335.
   Web of Science ®Google Scholar
• Hammer, S., Madsen, J.J., Jensen, J.-K., Pedersen, K.T., Bloch, D. & Thorup, K. 2014. The Faroese Bird Migration Atlas. Faroe University Press, Tórshavn.
   Google Scholar
• Heubeck, M. 1987. Changes in the status of the Common Eider in Shetland, 1977-1984. Scott. Birds 14: 146–152.
   Google Scholar
• Heubeck, M. 1993a. Moult flock surveys indicate a continued decline in the Shetland Eider population, 1984-92. Scott. Birds 17: 77–84.
   Google Scholar
• Heubeck, M. 1993b. SOTEAG Ornithological Monitoring Programme 1993 Summary Report. Shetland Oil Terminal Environmental Advisory Group, University of Aberdeen, Aberdeen.
   Google Scholar
• Heubeck, M. 1995. Shetland beached bird surveys: national and European context. Proc. Roy. Soc. Edinburgh 103B: 165–179.
   Google Scholar
• Heubeck, M. & Mellor, M. 2013. Recent changes in the status and distribution of moulting Common Eider Somateria mollissima in Shetland. Seabird 26: 71–86.
   Google Scholar
• Heubeck, M. & Richardson, M.G. 1980. Bird mortality following the Esso Bernicia oil spill, Shetland, December 1978. Scott. Birds 11: 97–108.
   Google Scholar
• Jones, P.H. & Kinnear, P. 1979. Moulting Eider in Orkney and Shetland. Wildfowl 30: 109–113.
   Google Scholar
• Keller, V., Herrando, S., Voříšek, P., Franch, M., Kipson, M., Milanesi, P., Martí, D., Anton, M., Klvaňová, A., Kalyakin, M.V., Bauer, H.-G. & Foppen, R.P.B. 2020. European Breeding Bird Atlas 2: distribution, abundance & change. European Bird Census Council & Lynx Edicions, Barcelona.
   Google Scholar
• Kilpi, M., Lorentsen, S.H., Petersen, I.K. & Einarsson, A. 2014. Trends and Drivers of Change in Diving Ducks. Nordic Council of Ministers, Copenhagen.
   Google Scholar
• Knudsen, E. 2019. On the origin of the Common Eider, Somateria mollissima, in the Faroe Islands and Iceland. MSc Thesis, Faculty of Life and Environmental Sciences, University of Iceland.
   Google Scholar
• Kurvinen, L., Kilpi, M., Nordström, M. & Öst, M. 2016. Drivers of decline and changed nest-site preference of the Baltic Eider: an island-level analysis from south-western Finland. Ornis Fenn. 93: 55–66.
   Web of Science ®Google Scholar
• Lehikoinen, A., Christensen, T.K., Öst, M., Kilpi, M., Saurola, P. & Vattulainen, A. 2008. Large-scale change in the sex-ratio of a declining Eider Somateria mollissima population. Wildl. Biol. 14: 288–301.
   Web of Science ®Google Scholar
• Miles, W.T.S. & Mellor, R.M. 2019. SOTEAG Ornithological Monitoring Programme in Shetland, Annual Report 2019. Shetland Oil Terminal Environmental Advisory Group, University of St Andrews, St Andrews. www.soteag.org.uk.
   Google Scholar
• Miles, W.T.S. & Mellor, R.M. 2020. SOTEAG Ornithological Monitoring Programme in Shetland, Annual Report 2020. Shetland Oil Terminal Environmental Advisory Group, University of St Andrews, St Andrews. www.soteag.org.uk.
   Google Scholar
• Miles, W.T.S. & Mellor, R.M. 2021. SOTEAG Ornithological Monitoring Programme in Shetland, Annual Report 2021. Shetland Oil Terminal Environmental Advisory Group, University of St Andrews, St Andrews. www.soteag.org.uk.
   Google Scholar
• Mullineaux, E. & Keeble, E. 2016. BSAVA Manual of Wildlife Casualties, 2nd ed. British Small Animals Veterinary Association, Quedgeley.
   Google Scholar
• Olsen, B. 2011. Heiðafuglur í Skúvoy 2010. Frágreiðing frá Havstovuni, Tórshavn.
   Google Scholar
• Pennington, M., Osborn, K., Harvey, P., Riddington, R., Okill, D., Ellis, P. & Heubeck, M. 2004. The Birds of Shetland. Christopher Helm, A&C Black Publishers Ltd., London.
   Google Scholar
• Pipoly, I., Bokony, V., Kirkpatrick, M., Donald, P.F., Székely, T. & Liker, A. 2015. The genetic sex-determination system predicts adult sex ratios in tetrapods. Nature 527: 91–94.
   PubMed Web of Science ®Google Scholar
• ProgrammingR.com. 2022. Arcsine Transformation in R. ProgrammingR.com, beginner to advanced resources for the R programming language. www.programmingr.com/tutorial/arcsine-transformation.
   Google Scholar
• R Core Team. 2019. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/.
   Google Scholar
• Ramula, S., Öst, M., Lindén, A., Karell, P. & Kilpi, M. 2018. Increased male bias in eider ducks can be explained by sex-specific survival of prime-age breeders. PLOS ONE 13: e0195415. doi:10.1371/journal.pone.0195415
   PubMed Web of Science ®Google Scholar
• Ritchie, W. & O’Sullivan, M. 1995. The Environmental Impact of the Wreck of the Braer. The Scottish Office, Edinburgh.
   Google Scholar
• Seatrack. 2021. Seatrack Seabird Tracking Online Data: Common Eider, Faroe Islands, all seasons, all years 2014 to 2020. Seatrack, SEAPOP, Norwegian Institute for Nature Research / Norwegian Polar Institute / Tromsø University Museum, Tromsø. https://seapop.no/en/seatrack/.
   Google Scholar
• Shetland Biological Records Centre. 1970–2021. Database of Eider Records in Shetland, 1970 to 2021 (Archive Data, Unpublished). Shetland Biological Records Centre, Shetland Amenity Trust, Lerwick, Shetland .
   Google Scholar
• Shetland Bird Club Annual Reports. 2000-2020. Bird Ringing in Shetland Annual Report, 2000 to 2020. Shetland Bird Club, Lerwick.
   Google Scholar
• Skov, H., Heinänen, S., Žydelis, R., Bellebaum, J., Bzoma, S., Dagys, M., Durinck, J., Garthe, S., Grishanov, G., Hario, M., Kieckbusch, J.J., Kube, J., Kuresoo, A., Larsson, K., Luigujoe, L., Meissner, W., Nehls, H.W., Nilsson, L., Petersen, I.K., Roos, M.M., Pihl, S., Sonntag, N., Stock, A., Stipniece, A. & Wahl, J. 2011. Waterbird Populations and Pressures in the Baltic Sea. Nordic Council of Ministers, Copenhagen.
   Google Scholar
• Smith, W.E. 2006. Moulting Common Eider devoured by Killer Whales. Br. Birds 99: 264.
   Google Scholar
• SOTEAG (Shetland Oil Terminal Environmental Advisory Group) Ornithological Monitoring Reports. 1978 to 2020. SOTEAG Ornithological Monitoring Programme in Shetland Annual Reports 1978-2020 (Heubeck, M., Mellor, R.M. & Miles, W.T.S.). SOTEAG. University of Aberdeen & University of St Andrews. www.soteag.org.uk.
   Google Scholar
• Tjørnløv, R.S. 2019. Population dynamics of a declining flyway population of Common Eider Somateria mollissima. PhD Thesis, Department of Bioscience, University of Aarhus.
   Google Scholar
• Waltho, C. & Coulson, J. 2015. The Common Eider. T & AD Poyser, Bloomsbury Publishing, London.
   Google Scholar
• Wetlands International. 2012. Waterbird Population Estimates, Fifth Edition. Summary Report. Wetlands International, Wageningen. http://wpe.wetlands.org/bundles/voidwalkerswpe/images/wpe5.pdf.
   Google Scholar
• Woodward, I., Aebischer, N., Burnell, D., Eaton, M., Frost, T., Hall, C., Stroud, D. & Noble, D. 2020. Population estimates of birds in Great Britain and the United Kingdom. Br. Birds 113: 69–104.
   Google Scholar