Blar i Brage IMR på forfatter "Korsbrekke, Knut"
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Minimalistic surveys clear the way for priorities in the ecosystem approach
Godø, Olav Rune; Hjellvik, Vidar; Tjøstheim, Dag; Korsbrekke, Knut (ICES CM documents;2009/I:20, Working paper, 2009)Standardized surveys are an integral part of most fish stock assessments. Ship time is expensive and new demands set by the ecosystem approach challenge present survey and sampling strategies with respect to coverage of ... -
Norwegian acoustic survey of North East Arctic cod on the spawning grounds off Lofoten
Korsbrekke, Knut (ICES CM Documents;1997/Y:18, Working paper, 1997)An acoustic survey of the spawning stock of North East Arctic Cod off Lofoten has been performed annually in March-April since 1982. The estimates for 1985-1997 have been recalculated and mean length and weight at age ... -
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) ... -
On subjectivity in the judging of acoustic records; comparison of degree of homogenity in allocation of echo values by different teams
Korsbrekke, Knut; Misund, Ole Arve (ICES CM Documents;1993/B:21, Working paper, 1993)On four fish abundance estimation surveys in the Barents Sea, january-february 1993, the acoustic records were judged by two independent teams. We have analyzed the degree of homogenity in allocation of echo values to ... -
Probability-based surveying using self-sampling to estimate catch and effort in Norway’s coastal tourist fishery
Vølstad, Jon Helge; Korsbrekke, Knut; Nilsen, Merete; Nilsson, Gro N.; Pennington, Michael; Subbey, Samuel; Wienerroither, Rupert (Journal article; Peer reviewed, 2011-06-08)Recreational fishing as a tourist activity has become an increasingly important part of the Norwegian travel industry and may contribute significantly to the fishing mortality on Norwegian coastal cod (Gadus morhua). ... -
Relationships between population spatial occupation and population dynamics
Woillez, Mathieu; Petitgas, Pierre; Rivoirard, Jacques; Fernandes, Paul G.; ter Hoftstede, Remment; Korsbrekke, Knut; Orlowski, Andrzej; Spedicato, Maria-Teresa; Politou, Chrissi-Yianna (ICES CM documents;2006/O:05, Working paper, 2006)Population dynamics is commonly described non-spatially using parameters of population demography and vital traits. Population spatial organisation is therefore considered implicit and its importance in the population ... -
Sampling gear selectivity and its effect on estimates of mean length at age
Korsbrekke, Knut (PINRO-IMR Symposium, Conference object, 1997)Using data fiom the Norwegian bottorn trawl surveys in the Barents Sea in February ( 1989- 1996), the International O-group surveys in the Barents Sea (1 985-1 996) and previously estimaied selectivity for the standard ... -
Schooling-by-size in the Barents Sea capelin stock
Gjøsæter, Harald; Korsbrekke, Knut (ICES CM Documents;1990/D:28, Working paper, 1990)This paper analyses the biological samples of capelin taken by the Institute of Marine Research, Bergen, on annual stock assesment surveys in the Barents Sea from 1972 to 1989. The dependency between mean length of ... -
Skipped spawning in Northeast Arctic haddock Melanogrammus aeglefinus
Skjæraasen, Jon Egil; Korsbrekke, Knut; Nilsen, Trygve; Fonn, Merete; Kjesbu, Olav Sigurd; Dingsør, Gjert Endre; Nash, Richard David Marriott (Journal article; Peer reviewed, 2015-04-22) -
Skreiinnsiget til Lofoten, våren 1997
Korsbrekke, Knut ([Toktrapport/Havforskningsinstituttet];, Working paper, 1997) -
Skreitokt 2020 - Kartlegging av gytebestanden av skrei 2020
Korsbrekke, Knut; Thorsen, Anders (Rapport fra havforskningen;2020 - 32, Research report, 2020)Toktets akustiske dekning av torsk, hyse og sei dekket kystområdet fra 71° nord sørover til og med Røstbanken, samt Vestfjorden. Dekningen ga et mengdeanslag på 553 tusen tonn skrei (aldersgruppene 5+, modne individer). ... -
Skreitokt nord - Kartlegging av gytebestanden av skrei nord for Vesterålsbankene 2023
Korsbrekke, Knut (Toktrapport;2024 - 1, Research report, 2024)Bakgrunnen for gjennomføring av dette toktet er usikkerheten rundt hvor store andeler av skreibestanden som gyter nord for det tradisjonelle skreitoktet. Skulle disse andelene være betydelige kan det ha betydning for ... -
StoX applied to cod and haddock data from the Barents Sea NOR-RUS ecosystem cruise in autumn - Swept area abundance, length and weight at age 2004-2017
Johannesen, Edda; Johnsen, Espen; Johansen, Geir Odd; Korsbrekke, Knut (Fisken og Havete;2019 - 6, Research report, 2019)North East Arctic cod and haddock are the largest stocks of these species in the world. Data from the Barents Sea NOR-RUS ecosystem cruise (BESS) in autumn is used as input to the assessment of these species. Here, we used ... -
The use of transplantation-tagging-experiments in studies of migratory diversity of cod off Norway
Godø, Olav Rune; Korsbrekke, Knut; Soldal, Aud Vold; Totland, Atle (ICES CM Documents;1994/Mini:12, Working paper, 1994)Cod along the Norwegian coast show great variability in migration. Coastal Cod may be stationary for the whole life while mature Northeast Arctic Cod migrate long distances to reach the feeding areas in the Barents Sea ... -
Toktrapport [11/3 - 8/4, 1994]
Sunnanå, Knut; Dommasnes, Are; Korsbrekke, Knut ([Toktrapport/Havforskningsinstituttet];, Working paper, 1994-06-15) -
Toktrapport [23/3 - 12/4, 1992]
Korsbrekke, Knut; Raknes, Askjell; Jørstad, Knut Eirik ([Toktrapport/Havforskningsinstituttet];, Working paper, 1992) -
Trade-offs between growth and reproduction in wild Atlantic cod
Folkvord, Arild; Jørgensen, Christian; Korsbrekke, Knut; Nash, Richard D.M.; Nilsen, Trygve; Skjæraasen, Jon Egil (Journal article; Peer reviewed, 2014-04-08)Animals partition and trade off their resources between competing needs such as growth, maintenance, and reproduction. Over a lifetime, allocation strategies should result in distinct trajectories for growth, survival, and ... -
Trophic relationships and feeding-dependent growth in the North-East Arctic cod
Ajiad, Adnan Mosa; Mehl, Sigbjørn; Korsbrekke, Knut; Dolgov, Andrey V.; Korzhev, V. A.; Tretyak, Viktor; Yaragina, Natalia A. (PINRO-IMR Symposium, Conference object, 1992) -
Types and frequency of malformations and mortality in eggs of Arcto-Norwegian cod: A field study
Makhotin, Valeri; Solemdal, Per; Korsbrekke, Knut; Salthaug, Are (ICES CM Documents;2001/N:12, Working paper, 2001)Embryological studies on living cod eggs in NUNC-trays showed that spontaneous malformations during embryo development are lethal. They are called natural egg mortality in contrast to external lethal factors, as ... -
Undersøkelser av skreiinnsiget til Lofoten 1996
Korsbrekke, Knut (Fisken og havet, Research report, 1996)The survey acoustically covered Cod, Haddock, Saithe and Redfish in the coastal areas from 71° north southwards including Røstbanken and the Vestfjorden area. Altogether 875 agesamples of cod from 26 trawl station were ...