Blar i Fisken og havet (1958- ) på forfatter "Christensen, Ivar"

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    • Merking, observasjoner og atferdsstudier av hval i Barentshavet og ved Svalbard i 1974 og 1975 ; 

      Benjaminsen, Terje; Berlund, Jørgen; Christensen, Dag; Christensen, Ivar; Huse, Ingvar; Sandnes, Otto (Fisken og havet, Research report, 1976)
      In 1974 and 1975 a total of 188 minke whales (Balaenoptera acutorostrata)and 14 humpback whales (Megaptera novaeangliae) have been marked in the Barents Sea and at Svalbard. In addition 2 minke whales have been tagged north ...

    • Spekkhoggeren (Orcinus orca) i det nordøstlige Atlanterhav 

      Christensen, Ivar (Fisken og havet, Research report, 1978)
      During the last two or three years schools of killer whales have often been reported in fjords and even harbours in Norway. The fishermen and their organizations fear that an increasing number of killer whales may ...

    • Undersøkelser av vågehval i Barentshavet og ved Øst- og VestGrønland i 1973 

      Christensen, Ivar (Fisken og havet, Research report, 1974)
      Observations of marine mammals were recorded and are tabulated. Observations of humpback whales indicate an increasing number in the eastern part of the North Atlantic. Material and data from minke whales were sampled ...

    • Vågehvalundersøkelser ved Spitsbergen og i Barentshavet i mai og juni 1972 

      Christensen, Ivar (Fisken og havet;1972 - Nr. 3, Research report, 1972)
      Small whale investigations were carried out in the month May and June 1972 with two whaling vessels in the area off Svalbard and in the Barents .Sea. As far as possible all whales observed during the cruise were recorded. ...