Attributes / relations provided by
♦ 1Summer Diet of the Harbour Porpoise (Phocoena phocoena) in the Estuary and the Northern Gulf of St. Lawrence, Pierre-Michel Fontaine, Mike O. Hammill, Cyrille Barrette, and Michael C. Kingsley, Can. J. Fish. Aquat. Sci. 51(1): 172178 (1994)
♦ 2The harbour seal Phoca vitulina as a predator in the Skagerrak. Haerkoenen, T | Heide-Joergensen, M-P, Ophelia. Vol. 34, no. 3, pp. 191-207 1991
♦ 3CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database
♦ 4THE DIET OF HARBOUR PORPOISE (PHOCOENA PHOCOENA) IN THE NORTHEAST ATLANTIC, M. B. SANTOS & G. J. PIERCE, Oceanography and Marine Biology: an Annual Review 2003, 41, 355390