Browsing Published in cooperation with others by Author "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 ... -
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 ... -
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 ... -
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 ... -
Laboratory experiments with internal tagging of saithe
Jakobsen, Tore; Jakupsstovu, Stein Hjalti (ICES CM Documents;1977/F:22, Working paper, 1977) -
Management strategies for the fish stocks in the Barents Sea : proceedings of the 8th PINRO-IMR Symposium, Bergen, 15-16June 1999
Jakobsen, Tore (IMR/PINRO Joint Report Series;5/2002, Research report, 2002) -
Management strategies for the fish stocks in the Barents Sea : proceedings of the 8th PINRO-IMR Symposium, Bergen, 15-16June 1999
Jakobsen, Tore (IMR/PINRO Joint Report Series;5/2002, Research report, 2002) -
Norwegian combined acoustic and bottom trawl surveys for demersal fish in the Barents Sea during winter
Jakobsen, Tore; Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd (ICES CM documents, Working paper, 1997)A combined acoustic and bottom trawl survey for demersal fish in the Barents Sea has been conducted annually since 1981. The main aim is to map the spatial distribution and obtain indices of abundance (numbers at age) ... -
Observations on the spawning grounds of the North Sea and Norway coast stocks of saithe
Jakobsen, Tore (ICES CM Documents;1974/F:44, Working paper, 1974) -
Precision in recruitment estimates and its implications on management of demersal fish stocks
Jakobsen, Tore (PINRO-IMR Symposium, Conference object, 1995)Errors in abundance indices of recruiting year-classes will affect stock predictions. The contribution of recruiting year-classes to the predictions of catch and spawning stock biomass for the stocks of Northeast Arctic ... -
Preliminary report of the Norwegian investigations on young cod and haddock in the Barents Sea
Nakken, Odd; Hylen, Arvid; Jakobsen, Tore; Nedreaas, Kjell Harald (ICES CM documents, Working paper, 1986)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1986. As a result of strong improvement in the recruitment for both species, most of the echo abundance ... -
Preliminary report of the Norwegian investigations on young cod and haddock in the Barents Sea during the winter 1985
Nakken, Odd; Hylen, Arvid; Sunnanå, Knut; Jakobsen, Tore (ICES CM documents, Working paper, 1985)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1985. The acoustic data and the biological data from trawl stations were combined in two different ways, ...