Attributes / relations provided by
♦ ¹Thorny Skate, Amblyraja radiata, Life History and Habitat Characteristics, David B. Packer, Christine A. Zetlin, and Joseph J. Vitaliano, NOAA Technical Memorandum NMFS-NE-178 (2003)
♦ ²The diet of king eiders wintering in Nuuk, Southwest Greenland, with reference to sympatric wintering common eiders, Flemming R. Merkel, Anders Mosbech, Sarah E. Jamieson, Knud Falk, Polar Biology Volume 30, Number 12, 1593-1597 (2007)