Attributes / relations provided by
♦ ¹Feeding and Food Consumption by the Barents Sea Skates, A.V. Dolgov, J. Northw. Atl. Fish. Sci., Vol. 35: 495–503
♦ 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
♦ ³Trophic ecology of blue whiting in the Barents Sea, Andrey V. Dolgov, Edda Johannesen, Mikko Heino, and Erik Olsen, ICES Journal of Marine Science, 67: 483–493