Exposing the grey seal as a major predator of harbour porpoises

Leopold, M. F.; Begeman, L.; van Bleijswijk, J. D. L.; IJsseldijk, L. L.; Witte, H. J.; Grone, A.
Proceedings of the Royal Society B: Biological Sciences (2014)

Harbour porpoises (Phocoena phocoena) stranding in large numbers around the southern North Sea with fatal, sharp-edged mutilations have spurred controversy among scientists, the fishing industry and conservationists, whose views about…


Porpoises: From predators to prey

Leopold, Mardik F.; Begeman, Lineke; Heße, Eileen; van der Hiele, Jaap; Hiemstra, Sjoukje; Keijl, Guido; Meesters, Erik H.; Mielke, Lara; Verheyen, Dorien; Gröne, Andrea
Journal of Sea Research (2015)

Along the Dutch shores hundreds of harbour porpoises Phocoena phocoena are stranded each year. A recurrent phenomenon in the Netherlands is a surge of strandings in late winter and early…


Increased harbor porpoise mortality in the Pacific Northwest, USA: understanding when higher levels may be normal

Huggins, JL; Raverty, SA; Norman, SA; Calambokidis, J; Gaydos, JK; Duffield, DA; Lambourn, DM; Rice, JM; Hanson, B; Wilkinson, K; Jeffries, SJ; Norberg, B; Barre, L
Diseases of Aquatic Organisms (2015)

In 2006, a marked increase in harbor porpoise Phocoena phocoena strandings were reported in the Pacific Northwest of the USA, resulting in the declaration of an unusual mortality event (UME)…