• Harbor porpoise (Phocoena phocoena) in Norwegian waters 

      Bjørge, Arne; Aarefjord, Hilde; Kaarstad, Sølvi; Kleivane, Lars; Øien, Nils (ICES CM Documents;1991/N:16, Working paper, 1991)
      Recordings made on the Norwegian Sighting Survey 1988 and the North Atlantic Sighting Survey 1988 (NASS-89) indicate a divided off shore distribution during summer for harbour porpoises in Norwegian waters, with a southern ...
    • The distribution and abundance of harbour porpoises and other small cetaceans in the North Sea and adjacent waters 

      Hammond, Philip S.; Benke, Harald; Breggren, Per; Collet, Anne; Heide-Jørgensen, Mads Peter; Heimlich-Boran, Sara; Leopold, Mardik; Øien, Nils (ICES CM Documents;1995/N:10, Working paper, 1995)
      To provide accurate and precise estimates of abundance for harbour porpoises and other small cetaceans throughout the North Sea and adjacent waters, an intensive shipboard and aerial sightings survey was conducted in ...
    • The distribution and abundance of harbour porpoises and other small cetaceans in the North Sea and adjacent waters 

      Hammond, Philip S.; Benke, Harald; Breggren, Per; Collet, Anne; Heide-Jørgensen, Mads Peter; Heimlich-Boran, Sara; Leopold, Mardik; Øien, Nils (ICES CM Documents;1995/N:10, Working paper, 1995)
      To provide accurate and precise estimates of abundance for harbour porpoises and other small cetaceans throughout the North Sea and adjacent waters, an intensive shipboard and aerial sightings survey was conducted in ...