Blar i Published by IMR på forfatter "Ulltang, Øyvind"
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Analyse av fangst pr. enhet innsats data for vågehval. Sluttrapport til NFFR.
Ulltang, Øyvind (Working paper, 1991-06)Innledning: Fangst pr. enhet innsats (cpue) data fra den norske vågehvalfangsten har tidligere vært analysert ved Havforskningsinstituttet med henblikk på å få et bilde av utviklingen i den nordøstatlantiske bestanden ... -
The management of cod stocks with special reference to growth and recruitment overfishing and the question whether artificial propagation can help solve management problems. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
Ulltang, Øyvind (Flødevigen rapportserie, Conference object, 1984)The terms qrowth overfishinq and recruitment overfishinq are defined. The exploitation and management of two of the major cod stocks in the North-East Atlantic, North-East Arctic cod and North Sea cod, are briefly ... -
Metodeutvikling for bestandestimering av hval. Sluttrapport til NFFR.
Ulltang, Øyvind (Working paper, 1991-06)Innledning: For å få et bestandsanslag for nordøstatlantisk vågehval har en de siste årene konsentrert seg om å gjennomføre linjetransekttellinger. Det største linjetransekttelletoktet fra norsk side ble gjennomført ... -
A model for incorporating changes in distribution of fishing effort in assessment of the effects of changes in trawl mesh size
Ulltang, Øyvind (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1983)Factors invalidating traditional mesh assessments are discussed with special emphasis on changes in distribution of fishing effort between areas inhabited by small and large fish. A model for studying the effects of such ... -
A note on stock size development of harp seals in the Barents Sea and the White Sea
Ulltang, Øyvind (Report SPS, Working paper, 1989-11-14) -
Overvåking av hval i Nordatlanteren
Schweder, Tore; Ulltang, Øyvind; Øien, Nils (Rapport fra senter for marine ressurser;Nr. 6 - 1993, Working paper, 1993) -
Regulering av loddefisket
Dragesund, Olav; Monstad, Terje; Ulltang, Øyvind (Fisken og havet, Research report, 1973)The effect of different regulatory measures on the fishery for Barents Sea capelin was studied by calculating yield per recruit and spawning stock per recruit for several fishing strategies. It is concluded that the ... -
Sjøpattedyr - flerbestandsmodeller
Ulltang, Øyvind (Rapport fra senter for marine ressurser;Nr. 5 - 1993, Working paper, 1993) -
Stock size fluctuations and rate of exploitation of the norwegian spring spawning herring, 1950-1974
Dragesund, Olav; Ulltang, Øyvind (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1978)Stock size fluctuations and rate of exploitation of the Norwegian spring spawning herring, 1950-1974. FiskDir. Skr. Ser. HavUnders., 16: 315-337. The collapse of the Norwegian spring spawning herring stock is described, ... -
Undersøkelser av fiskeforekomster i Barentshavet og ved Spitsbergen i august - september 1972
Gjøsæter, Jakob; Midttun, Lars; Monstad, Terje; Nakken, Odd; Smedstad, Odd M.; Sætre, Roald; Ulltang, Øyvind (Fisken og havet;1972 - Nr. 3, Research report, 1972)During August—September 1972 observations were made on distribution and abundance of fish in the Barents Sea and off Spitsbergen. The observations of 0-group fish are published in separate report. The amount of capelin ...