Blar i Brage IMR på forfatter "Nedreaas, Kjell Harald"
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Biological and economic implications of a multi-gear fishery for greenland halibut (Reinhardtius hippoglossoides)
Nedreaas, Kjell Harald; Sandberg, Per; Veim, Anne Kjos (ICES CM Documents;1995/S:5, Working paper, 1995)This paper focuses on the level and distribution of fishing mortality in a multigear fishery, and its effect on biological and economic parameters. The Greenland halibut stock in ICES Sub-areas I and Il is at a historically ... -
Bruk av pelagisk trål til prøvetaking av blåkveite og snabeluer [6/8 - 19/9, 2007]
Gamst, Kjell Arne; Nedreaas, Kjell Harald; Vollen, Tone ([Toktrapport/Havforskningsinstituttet];Nr. 18 - 2007, Working paper, 2007) -
The Coastal Reference Fleet 2007-2019 - Fleet composition, fishing effort and contributions to science
Hatlebrekke, Hanne Hjelle; Gundersen, Sofie; Nedreaas, Kjell Harald; Vølstad, Jon Helge; Kolding, Jeppe (Rapport fra havforskningen;2021 - 52, Research report, 2021)Catch quotas are used for the sustainable management of fish stocks and are based on official catch statistics and research surveysSustainable management of the Norwegian fisheries depends on quota advice that is based on ... -
Data fra fiskeriene
Nedreaas, Kjell Harald (Chronicle, 2010-05-28) -
Depletion of coastal predatory fish sub-stocks coincided with the largest sea urchin grazing event observed in the NE Atlantic
Norderhaug, Kjell Magnus; Nedreaas, Kjell Harald; Huserbråten, Mats; Moland, Even (Peer reviewed; Journal article, 2020)In this contribution, we propose fishery driven predator release as the cause for the largest grazing event ever observed in the NE Atlantic. Based on the evolving appreciation of limits to population connectivity, published ... -
Discards of cod (Gadus morhua) in the Norwegian coastal fisheries: improving past and future estimates
Hilde Sofie Fantoft, Berg; Clegg, Tom; Blom, Geir; Kolding, Jeppe; Ono, Kotaro; Nedreaas, Kjell Harald (Peer reviewed; Journal article, 2022)Discarding can be an unknown source of biases and uncertainties in stock assessments. Discarding patterns and quantities vary so a routine methodology for estimating discards is important to give a better picture of total ... -
Discrimination of the redfish (Sebastes mentella) stock components in the Irminger Sea and adjacent waters based on meristics, morphometry and biological characteristics
Trella, K.; Nedreaas, Kjell Harald; Janusz, J.; Podolska, M. (ICES CM documents;2011/A:28, Working paper, 2011) -
Distribution of deep sea shrimp (Pandalus borealis Krøyer) in relation to temperature in the Barents Sea
Nedreaas, Kjell Harald; Øynes, Per (PINRO-IMR Symposium, Conference object, 1987)In the years 1980 to 1985 stratided raildom bottom trawl surveys were carried out on the shrimp fields in the Svalbard and Barents Sea regions. The objeetives of the cruises were to study the structure of the shrimp stock ... -
Early development of Northeast Arctic greenland halibut (Reinhardtius hippoglossoides)
Stene, Anne; Gundersen, Agnes C.; Albert, Ole Thomas; Solemdal, Per; Nedreaas, Kjell Harald (ICES CM Documents;1998/O:27, Working paper, 1998)The early development of the Greenland halibut (Reinhardtius hippoglossoides) has never been described in detail. This study contains some preliminary notes on the egg development of the Northeast Arctic Greenland halibut ... -
Electrophoretic studies of redfish (Genus sebastes) from Icelandic and Greenland waters
Nedreaas, Kjell Harald; Nævdal, Gunnar; Johansen, Torild (ICES CM Documents;1992/G:36, Working paper, 1992)Sebastes spp. from Icelandic and Greenland waters were analysed for biochemical genetic variation by agar gel and starch gel electrophoresis. The main emphasize was put on S. marinus, but the oceanic type S. mentella ... -
Essay om fiskerier i Porsangerfjorden før og nå - et resultat av møter mellom fjordbrukere og forskere
Strand, Hans Kristian; Daleng, Jan; Eliassen, Tore; Follesø, Thor; Gjøsæter, Harald; Hansen, Hans Oliver; Hansen, Thomas; Johansen, Hartvig; Josefsen, Hedly; Larsen, Dagny; Martinsen, Terje; Nedreaas, Kjell Harald; Pedersen, Torstein; Skern-Mauritzen, Mette; Strand, Mette; Søvik, Guldborg; Zimmermann, Fabian (Rapport fra havforskningen;2020 - 41, Research report, 2020)Porsangerfjorden gikk fra å være en fiskerik fjord i første halvdelen av 1900-tallet, til en mye mer fiskefattig fjord i den andre halvdelen. Den fiskefattige tilstanden har vedvart fram til i dag. Den invaderende kongekrabben ... -
Estimates of stock size of cod, haddock, redfish and Greenland halibut in the Barents Sea and the Svalbard area autumn 1988
Hylen, Arvid; Loeng, Harald; Mehl, Sigbjørn; Nedreaas, Kjell Harald (ICES CM documents, Working paper, 1989)Combined acoustic and bottom trawl survey for cod, haddock and redfish were carried out in autumn 1988 in the Svalbard area together with an acoustic survey in the Barents Sea. The abundance indicies of cod decreased from ... -
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987
Hylen, Arvid; Jacobsen, Jan Arge; Mehl, Sigbjørn; Nedreaas, Kjell Harald (ICES CM Documents;1988/G:44, Working paper, 1988)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area together with an acoustic survey in the Barents Sea in autumn 1987. The abundance index in numbers of cod continued ... -
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 ... -
Estimering av utkast i norsk kystfiske med garn - 2012-2018
Hilde Sofie Fantoft, Berg; Nedreaas, Kjell Harald (Fisken og havet;2021 - 1, Research report, 2021)Informasjonen om ikke-omsettelig fangst (utkast) fra Kystreferanseflåten (KRF) blir i denne rapporten benyttet til å oppskalere utkastet til å gjelde hele flåtesegmentet ved bruk av ulike innsats-faktorer. Rapporten ... -
Evaluation of the North-East Arctic saithe (Pollachius virens) acoustic survey
Nedreaas, Kjell Harald (ICES CM Documents;1997/Y:20, Working paper, 1997)Since 1985 an acoustic survey specially designed for saithe has annually been conducted in October-November by the Institute of Marine Research (IMR) on the Norwegian near coastal banks. Since 1992 the survey has covered ... -
Fecundity of Greenland halibut (Reinhardtius hippoglossoides) in the north east Arctic
Gundersen, Agnes C.; Kjesbu, Olav Sigurd; Stene, Anne; Nedreaas, Kjell Harald (ICES CM documents, Working paper, 1998) -
Fifteen years of annual Norwegian-Russian cod comparative age readings
Yaragina, Natalia A.; Nedreaas, Kjell Harald; Koloskova, V.P.; Mjanger, Hildegunn; Senneset, Harald; Zuykova, N.V.; Ågotnes, Per (IMR/PINRO Joint Report Series;5/2007, Conference object, 2007)