Aquatic Mammals (2015)
(...)Grey seals are generalist feeders, taking a wide variety of fish, mollusc, echinoderm, crustacean, and cephalopod prey (Bowen & Harrison, 1994; Hammond et al., 1994; Strong, 1996; Brown et al.,…
Eat and be eaten – Porpoise diet studies
Leopold, Maarten Frederik
Doctoral Thesis - Wageningen University (2015)
1. Diet studies of marine mammals typically summarise prey composition across all individuals studied. Variation in individual diets is usually ignored, but may be more than just “noise” around an…
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…
Direct evidence for gray seal (Halichoerus grypus) predation and scavenging on harbor porpoises (Phocoena phocoena)
Bouveroux, Thibaut; Kiszka, Jeremy J.; Heithaus, Michael R.; Jauniaux, Thierry; Pezeril, Sylvain
Mar Mam Sci (2014)
(...) gray seal (Halichoerus grypus) consumption of harbor porpoises—whether predation or scavenging—might reflect a change in gray seal feeding habits in the southern North Sea (Haelters et al. 2012), where…
The ecological role of the vaquita, Phocoena sinus, in the ecosystem of the northern Gulf of California
Riofrío-Lazo, Marjorie; Arreguín-Sánchez, Francisco; Zetina-Rejón, Manuel; Escobar-Toledo, Fabián
Ecosystems (2012)
From an ecosystem management perspective, analysis of the functional roles of species is a challenge. It is valuable to determine which species are irreplaceable within a given community based on…
The grey seal (Halichoerus grypus) as a predator of harbour porpoises (Phocoena phocoena)?
Haelters, Jan; Kerckhof, Francis; Jauniaux, Thierry; Degraer, Steven;
Aquatic Mammals (2012)
In September 2011, two harbour porpoises (Phocoena phocoena) presenting extensive traumatic lesions washed ashore in Belgium. Similar lesions, with large parts of skin and blubber missing, had not been recorded…
Predation by killer whales (Orcinus orca) and the evolution of whistle loss and narrow-band high frequency clicks in odontocetes
Morisaka, T.; Connor, R. C.
Journal of Evolutionary Biology (2007)
A disparate selection of toothed whales (Odontoceti) share striking features of their acoustic repertoires including the absence of whistles and high frequency but weak (low peak-to-peak source level) clicks that…
Mortality and morbidity of Hong Kong finless porpoises, with emphasis on the role of environmental contaminants
Jefferson, T. A.; Curry, B. E.; Kinoshita, R.
The Raffles Bulletin of Zoology (2002)
Data on causes of death for finless porpoise (Neophocaena phocaenoides) specimens stranded in Hong Kong between 1995 and 2000 were evaluated. We diagnosed several causes of death, including fishing net…
Proceedings of the International Harbour Porpoise Workshop
Bowen, D.; Brodie, P.; Conway, J.; Gearin, P.; Hammill, M.; Hood, C. C.; Kingsley, M.; Lesage, V.; Lien, J.; Metuzals, K.; Palka, D.; Potter, D.; Read, A.; Rosel, P.; Simon, P.; Stenson, G.
(2001)
Serious concerns have been raised regarding the status of the harbour porpoise populations in the North Atlantic and specifically for those inhabiting Atlantic Canadian waters. In 1991 harbour porpoise in…
Dall’s porpoise Phocoenoides dalli (True, 1885)
Houck, W. J.; Jefferson, T. A.
Handbook of Marine Mammals (1999)
Abstract currently unavailable