Attributes / relations provided by
♦ 1Winter feeding ecology and trophic relationships of Oldsquaws and White-winged Scoters on Kachemak Bay, Alaska, Gerald A. Sanger and Robert D. Jones, Jr., Canadian Wildlife Service, 1984
♦ 2Feeding of Bearded Seals in the Bering and Chukchi Seas and Trophic Interaction with Pacific Walruses, LLOYD F. LOWRY, KATHRYN J. FROST, AND JOHN J. BURNS, ARCTIC VOL. 33, NO. 2 (JUNE 1980). P. 330-342
♦ 3Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014).
Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
♦ 4Groundfish Food Habits and Predation on Commercially Important Prey Species in the Eastern Bering Sea From 1997 Through 2001, Lang, G. M., P. A. Livingston, and K. A. Dodd, 2005, U.S. Dep. Comer., NOAA Tech. Memo. NMFS-AFSC-158, 230 p.