Blar i Brage IMR på forfatter "Jakobsen, Tore"
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0-group saithe in the west Spitsbergen area.
Hylen, Arvid; Jakobsen, Tore (ICES CM Documents;1971/F:20, Working paper, 1971) -
A model simulating the effect of sampling strategy on stock assessment of gadoids in sub-areas I and II
Jakobsen, Tore; Nedreaas, Kjell Harald (ICES CM Documents;1986/G:69, Working paper, 1986)In the northeast Atlantic, management advice for fisheries is usually based on Virtual Population Analysis, yield per recruit, and predictions of catch and biomass. For these calculations, age distributions and weigth-at-age ... -
Abundance estimation with echo integrator of arctic cod on the spawning grounds in Lofoten 1972
Jakobsen, Tore; Smedstad, Odd M. (ICES CM Documents;1972/F:37, Working paper, 1972) -
Assessment of the North-East Arctic and North Sea Stocks of Saithe Taking Into Account Migration
Jakobsen, Tore (ICES CM Documents;1981/G:36, Working paper, 1981)Tagging experiments have shown that there is a substantial migration of young saithe from the Norwegian coast north of 62°N to the North Sea. Assessments of the North-East Arctic and North Sea Stocks of saithe were made ... -
Biological reference points for north-east Arctic cod and haddock
Jakobsen, Tore (ICES CM Documents;1989/G:29, Working paper, 1989)It has been suggested by ACFM that Fmed might be preferable to Fmax as a biological reference point for the North-East Arctic cod. However, the Fmed level of more than twice Fmax appeared high, and it was known to have ... -
Bunnfiskundersøkelser ved Bjørnøya, Spitsbergen og i Barentshavet med F/F "G. O. Sars" 3. - 20. november 1970
Hylen, Arvid; Jakobsen, Tore; Lahn-Johannessen, John; Smedstad, Odd M.; Sætre, Roald (Fisken og havet, Research report, 1972)The primary aim of the cruise was to obtain data of the abundance and distribution of the prerecruits (0—3 years of age) of cod and haddock. It was also intended that the cruise should yield information about the suitability ... -
Demonstration of maternal effects of Atlantic cod: Combining the use of unique mesocosm and novel molecular techniques – A new EU-project
Svåsand, Terje; Ajiad, Adnan Mosa; Dahle, Geir; Jakobsen, Tore; Kjesbu, Olav Sigurd; Moksness, Erlend; Otterå, Håkon; Solemdal, Per; Thorsen, Anders (ICES CM documents, Working paper, 2000)One of the effects of fishing is a reduction in average age and size in exploited fish stocks, leading to an increasing proportion of recruit spawners in the stock. Current management practice assumes equal viability of ... -
Egner vintertoktet seg til overvåking av endringer i fiskesamfunnet i Barentshavet? : en gjennomgang av metodikk og data fra 1981-2007
Johannesen, Edda; Wenneck, Thomas de Lange; Høines, Åge S.; Aglen, Asgeir; Mehl, Sigbjørn; Mjanger, Hildegunn; Fotland, Åge; Halland, Tor Ivar; Jakobsen, Tore (Fisken og havet, Research report, 2009-12-10)The winter survey (1981-) is the longest bottom trawl time series in the Barents Sea. The survey is used as tuning series in cod and haddock assessment, but change and ecosystem-based management, necessitates the study of ... -
Estimates of stock size of Northeast Arctic cod and haddock from survey data 1986/1987
Godø, Olav Rune; Hylen, Arvid; Jacobsen, Jan Arge; Jakobsen, Tore; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sunnanå, Knut (ICES CM documents, Working paper, 1987)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area in autumn 1986 and in the Barents Sea during the winter 1987. An acoustic survey for spwaning cod was carried out in March ... -
Estimates of stock size of northeast Arctic cod and haddock, "Sebastes mentella" and "Sebastes marinus" from survey data, winter 1988
Hylen, Arvid; Jacobsen, Jan Arge; Jakobsen, Tore; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sunnanå, Knut (ICES CM Documents;1988/G:43, Working paper, 1988)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1988. The fish still had the westerly distribution established in the previous year, but the echo ... -
Estimates of stock size of northeast arctic cod and haddock, Sebastes mentella and Sebastes marinus from survey data, winter 1989
Jakobsen, Tore; Mehl, Sigbjørn; Nakken, Odd; Nedreaas, Kjell Harald; Sunnanå, Knut (ICES CM documents, Working paper, 1989)The combined acoustic and bottom trawl survey in the Barents Sea in winter has been carried out since 1981. The target species are cod and haddock, but in recent years the redfish species Sebastes marinus and Sebastes ... -
Experimental fishing with multifilament, monofilament, and monotwine gillnets in the spawning season of Arcto-Norwegian cod in Lofoten in 1974
Hylen, Arvid; Jakobsen, Tore (ICES CM Documents;1974/B:17, Working paper, 1974) -
Fisheries management in the Barents Sea
Jakobsen, Tore (ICES CM Documents;1999/Q:1, Working paper, 1999)The fisheries in the Barents Sea are of very high importance to the region. Most of the fish stocks are shared by Norway and Russia and joint management decisions are taken by The Joint Norwegian-Russian Fisheries ... -
A fishing experiment with multifilament, monofilament and monotwine gill nets in Lofoten during the spawning season of Arcto-Norwegian cod in 1974
Hylen, Arvid; Jakobsen, Tore (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1979)A fishing experiment with multifilament, monofilament, and monotwine gill nets in Lofoten during the spawning season of Arcto-Norwegian cod in 1974. FiskDir. Skr. Ser. HavUnders., 16: 531-550. From 6 February to 30 March ... -
Fiskeforsøk med multifilament, monofilament, og monotwine nylongarn under lofotfisket i 1974
Hylen, Arvid; Jakobsen, Tore (Fisken og havet, Research report, 1975)From 6 February to 30 March 1974 during the spawning migration of Arcto-Norwegian cod a fishing experiment with gill nets of continuous-multifilament nylon, nylon monofilament and nylon monotwine was carried out in ... -
Foreløpige resultater av merkeforsøk med småsei på Vestlandet i 1971og 1972
Jakobsen, Tore (Fisken og havet, Research report, 1976)In 1971 and 1972, 3993 immature, 2-4 year old saithe were tagged and released at seven localities on the west coast of Norway. This paper deals with the recoveries made before 1973. The migration pattern appears to be ... -
Forvaltning av norsk-arktisk torsk [1994]
Jakobsen, Tore; Sunnanå, Knut; Bogstad, Bjarte (Havforskningsnytt, Working paper, 1994) -
Investigations on demersal fish in the Barents Sea winter 2000 : detailed report
Aglen, Asgeir; Drevetnyak, Konstantin; Jakobsen, Tore; Korsbrekke, Knut; Lepesevich, Yuri; Mehl, Sigbjørn; Nakken, Odd; Nedreaas, Kjell Harald (IMR/PINRO joint report series, Research report, 2001)A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January-March) since 1981 in the Barents Sea. The target ... -
Investigations on demersal fish in the Barents Sea winter 2000 : detailed report
Aglen, Asgeir; Drevetnyak, Konstantin; Jakobsen, Tore; Korsbrekke, Knut; Lepesevich, Yuri; Mehl, Sigbjørn; Nakken, Odd; Nedreaas, Kjell Harald (IMR/PINRO joint report series, Research report, 2001)A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January-March) since 1981 in the Barents Sea. The target ... -
Laboratorieforsøk med innvendig merking av sei
Jakobsen, Tore; Jakupsstovu, Stein Hjalti (Fisken og havet, Research report, 1977)Recovery of internal tags during the filleting process would create new possibilities for tagging experiments on several species, in Norwegian fisheries primarily cod, haddock, saithe, herring and mackerel. In connection with ...