Blar i Brage IMR på forfatter "Korsbrekke, Knut"
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Fish investigations in the Barents Sea winter 2021 : IMR/PINRO Joint Report Series nr. 1 2022
Fall, Johanna Jennifer Elisabeth; Wenneck, Thomas de Lange; Bogstad, Bjarte; Fuglebakk, Edvin; Godiksen, Jane Aanestad; Korsbrekke, Knut; Seim, Silje Elisabeth; Skage, Malin Lie; Staby, Arved; Tranang, Caroline Aas; Windsland, Kristin; Russkikh, Alexey A.; Fomin, Konstantin (IMR/PINRO Joint Report Series;, Research report, 2022)This report presents the main results from the surveys in January-March 2021. The surveys were performed with the Norwegian research vessels “Helmer Hanssen”, “Kronprins Haakon” and “Johan Hjort”, and the Russian research ... -
Fish investigations in the Barents Sea Winter 2022
Fall, Johanna Jennifer Elisabeth; Wenneck, Thomas de Lange; Bogstad, Bjarte; Fuglebakk, Edvin; Godiksen, Jane Aanestad; Høines, Åge Sigurd; Korsbrekke, Knut; Skage, Malin Lie; Staby, Arved; Tranang, Caroline Aas; Windsland, Kristin; Russkikh, Alexey A.; Kharlin, Sergey (IMR/PINRO Joint Report Series;2023 - 1, Research report, 2023)Annual catch quotas and other regulations of the Barents Sea fisheries are set through negotiations between Norway and Russia. Assessment of the state of the stocks and quota advice are based on survey results and international ... -
Fordeling og relativ mengde av norsk arktisk torsk, hausten 1990.
Mehl, Sigbjørn; Godø, Olav Rune; Korsbrekke, Knut ([Toktrapport/Havforskningsinstituttet];, Working paper, 1991) -
Interactions between cod (Gadus morhua) and deep sea shrimp (Pandalus Borealis) in the Barents Sea
Korsbrekke, Knut; Mehl, Sigbjørn; Hylen, Arvid (ICES CM documents, Working paper, 1991)For some of the most important deep sea shrimp (Pandalus borealis) areas in the Barents Sea the content of shrimp in cod (Gadus morhua) stomachs during the first part of each year in the period 1984-1990 is analysed. Total ... -
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 ... -
Investigations on demersal fish in the Barents Sea winter 2001 : detailed report
Aglen, Asgeir; Alvsvåg, John; Lepesevich, Yuri; Korsbrekke, Knut; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sokolov, Konstantin; Ågotnes, Per (IMR/PINRO joint report series, Research report, 2002)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 (46 weeks in January- March) since 1981 in the Barents Sea. The target ... -
Investigations on demersal fish in the Barents Sea winter 2002 : detailed report
Aglen, Asgeir; Alvsvåg, John; Drevetnyak, Konstantin; Høines, Åge S.; Korsbrekke, Knut; Mehl, Sigbjørn; Sokolov, Konstantin (IMR/PINRO joint report series, Research report, 2002)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 2002 : detailed report
Aglen, Asgeir; Alvsvåg, John; Drevetnyak, Konstantin; Høines, Åge S.; Korsbrekke, Knut; Mehl, Sigbjørn; Sokolov, Konstantin (IMR/PINRO joint report series, Research report, 2002)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 2004 : detailed report
Aglen, Asgeir; Alvsvåg, John; Høines, Åge S.; Korsbrekke, Knut; Smirnov, Oleg; Zhukova, Nathalia (IMR/PINRO joint report series, Research report, 2004)The main results in 2004 were: - The abundance of the 2003 and 2001 year classes of cod are poor, the 2002 and 1999 year classes are below average, while the 2000 and 1998 year classes are near average. - The abundance of ... -
Kartlegging av gytebestanden av skrei, våren 1998
Korsbrekke, Knut ([Toktrapport/Havforskningsinstituttet];, Working paper, 1998) -
Large annual variation in the amount of skipped spawning for female Northeast Arctic haddock Melanogrammus aeglefinus
Skjæraasen, Jon Egil; Korsbrekke, Knut; Dingsør, Gjert Endre; Langangen, Øystein; Opdal, Anders Frugård; Jørgensen, Christian (Peer reviewed; Journal article, 2020)Although the phenomenon of skipped spawning has been described in numerous fishes, time-series are scarce. We used the presence of post-ovulatory follicles in histological gonad slides from females not developing oocytes ... -
Large annual variation in the amount of skipped spawning for female Northeast Arctic haddock Melanogrammus aeglefinus
Skjæraasen, Jon Egil; Korsbrekke, Knut; Dingsør, Gjert Endre; Langangen, Øystein; Opdal, Anders Frugård; Jørgensen, Christian (Peer reviewed; Journal article, 2020)Although the phenomenon of skipped spawning has been described in numerous fishes, time-series are scarce. We used the presence of post-ovulatory follicles in histological gonad slides from females not developing oocytes ... -
Length and species dependent diurnal variation in catch rates in the Norwegian Barents Sea bottom trawl surveys
Korsbrekke, Knut; Nakken, Odd (ICES CM documents, Working paper, 1997)Diurnal variation in capture efficiency may add to the variability in swept area estimates (or indices) from bottom trawl surveys. In the present study the relationship between the day/night ratio of swept area estimates ... -
Limiting inter-annual variation in total allowable catch strategies. An application to ICES roundfish stocks
Kell, Laurence T.; Pilling, Graham; Kirkwood, Geoffrey P.; Pastoors, Martin; Abaunza, Pablo; Aps, Robert; Biseau, Alain; Korsbrekke, Knut; Kunzlik, Philip; Laurec, Alain; Mesnil, Benoit; Needle, Coby L.; Roel, Beatriz; Ulrich, Clara (ICES CM Documents;2003/X:7, Working paper, 2003)This study evaluated through simulation management strategy that stabilise catch levels by setting bounds on the inter-annual variability in Total Allowable Catches (TACs). An integrated modelling approach was used, which ... -
Making use of Johan Hjort's “unknown” legacy: reconstruction of a 150-year coastal time-series on northeast Arctic cod (Gadus morhua) liver data reveals long-term trends in energy
Kjesbu, Olav Sigurd; Opdal, Anders Frugård; Korsbrekke, Knut; Devine, Jennifer A.; Skjæraasen, Jon Egil (Journal article; Peer reviewed, 2014-03-11)Hidden within the seminal 1914 publication by Johan Hjort, we find what is probably one of the first comprehensive teleost time-series ever published. The series is liver size and fat content of northeast Arctic (NEA) cod ... -
Mengdemåling av sei : Finnmark - Møre, hausten 1999
Korsbrekke, Knut; Mehl, Sigbjørn (Fisken og havet, Research report, 2000)Eit akustisk tokt med sikte på å kartleggja geografisk utbreiing og framskaffa mål for tal og vekstdata hos sei og annan botnfisk har vore gjennomført på kystbankane i oktober-november sidan 1985. Seien er vanlegvis ikkje ... -
Mengdemåling av sei Finnmark - Møre, hausten 2002
Korsbrekke, Knut; Mehl, Sigbjørn ([Toktrapport/Havforskningsinstituttet];Nr. 30, Working paper, 2002) -
Mengdemåling av sei, Finnmark - Møre, hausten 1996
Korsbrekke, Knut; Nakken, Odd; Nedreaas, Kjell Harald (Fisken og havet, Research report, 1996)Eit akustisk tokt med sikte på å kartleggle geografisk utbreiing og framskaffe mål for tal og vekstdata hos sei og annan botnfisk har vore gjennomført sidan 1985 på kystbankane. Seien er vanlegvis ikkje rekruttert til ... -
Miljøinformasjon i bestandsvurdering og rådgivning
Huse, Geir; Bogstad, Bjarte; Hauge, Kjellrun Hiis; Korsbrekke, Knut; Loeng, Harald; Michalsen, Kathrine; Skagen, Dankert W.; Stiansen, Jan Erik; Sundby, Svein; Svendsen, Einar; Tjelmeland, Sigurd; Toresen, Reidar (Fisken og havet, Research report, 2007)This report summarizes the work of an internal working group appointed by the Institute of Marine Research's management group to evaluate inclusion of environmental parameters in stock evaluation. The report discusses ...