Literature
  • Ugland 1993
  • Fish consumption by invading Harp Seals off the Norwegian coast in 1987 and 1988. ICES J. mar. Sci. 50: 27-38
  • Uspenski 1958
  • The bird bazaars of Novaya Zemlya. Transl. Russ. Game Rep. No. 4, 346pp, Dept. North. Affairs and Nat. Res., Canada
  • Uttley 1989
  • Differential effects of reduced sandeel availability on two symphathically breeding species of tern. Ornis Scand. 20: 273-277