Blar i Brage IMR på forfatter "Sundby, Svein"
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The egg production of Arcto-Norwegian cod (Gadus morhua L.) in the Lofoten area estimated by egg surveys
Sundby, Svein; Solemdal, Per (PINRO-IMR Symposium, Conference object, 1984)Spawning intensity measurements have been executed in Lofoten each year since 1976. They consist of egg net samples at selected spawning cites . In 1983, in addition, four quasi-synoptic egg surveys were conducted during ... -
Experimental Parameterisation of Principal Physics in Buoyancy Variations of Marine Teleost Eggs
Jung, Kyung-Mi; Folkvord, Arild; Kjesbu, Olav Sigurd; Sundby, Svein (Journal article; Peer reviewed, 2014-08-14)It is generally accepted that the high buoyancy of pelagic marine eggs is due to substantial influx of water across the cell membrane just before ovulation. Here we further develop the theoretical basis by applying laboratory ... -
Factors affecting the vertical distribution of eggs [HELP 34]
Sundby, Svein (help;1990 nr. 34, Research report, 1990)The spatia1 distribution of eggs and larvae is a function of the properties of the ambient water, i.e. the density, current and turbulent diffusion, and of the physical properties of the eggs, i.e. the buoyancy and ... -
Feeding and vertical distribution of cod larvae in relation to availability of prey organisms
Ellertsen, Bjørnar; Solemdal, Per; Sundby, Svein; Tilseth, Snorre; Westgård, Trond; Øiestad, Victor (Conference object, 1979)The year-class strength of the Arcto-Norwegian cod stock varies on an annual basis by a factor of about 20:1 and is determined at the 0-group stage (about 1/2 year old cod). Since the number of eggs spawned far exceeds the ... -
Feeding conditions of Arcto-Norwegian cod larvae compared to the Rothschild-Osborn theory on small-scale turbulence and plankton contact rates. [HELP 29]
Sundby, Svein; Fossum, Petter (help, Research report, 1989)Data on first feeding Arcto-norwegim cod larvae in Lofoten, northern Norway, sampled during the period 1974 - 1984, are examined to verify the theory on the influence of small-scale turbulence on the contact rate between ... -
Feeding conditions of north-east Arctic (Arcto-Norwegian) cod larvae compared to the Rothschild-Osborn theory on small-scale turbulence and plankton contact rates
Sundby, Svein; Fossum, Petter (ICES CM Documents;1989/G:19, Working paper, 1989)Data on first feeding North-east arctic cod larvae in Lofoten, sampled during the period 1976 - 1984, are examined to verify the theory on the influence of microturbulence on the contact rate between predator and prey ... -
Feeding of plankton in a turbulent environment: A comparison of analytical and observational results covering also strong turbulence
Pécseli, Hans L.; Trulsen, Jan K.; Stiansen, Jan Erik; Sundby, Svein (Peer reviewed; Journal article, 2020)The present studies address feeding of plankton in turbulent environments, discussed by a comparison of analytical results and field data. Various models for predator-prey encounters and capture probabilities are reviewed. ... -
Feeding of plankton in turbulent oceans and lakes
Pécseli, Hans L.; Trulsen, Jan K.; Stiansen, Jan Erik; Sundby, Svein; Fossum, Petter (Journal article; Peer reviewed, 2019)Analytical models for the statistical distribution of the gut content of fish larvae in a turbulent ocean environment are compared to data obtained in a field experiment. The proposed model allows the nutrition state and ... -
Går vi mot en ny istid?
Sundby, Svein (Havforskningsnytt, Working paper, 2004) -
Half a century of high-latitude fisheries oceanography research on the "recruitment problem" in Northeast Arctic cod (Gadus morhua)
Kjesbu, Olav Sigurd; Tiedemann, Maik; Alix, Maud; Thorsen, Anders; Sundby, Svein (Peer reviewed; Journal article, 2023)Predicting recruitment in a reliable fashion is a great challenge within operational fisheries advice. Here, we consulted the unique but undercommunicated IMR Cod Larva Project (1975–1990), its spin-offs, placed in an ... -
Havklimaet i Arktis og den aktuelle situasjonen sommeren 2008 : Arctic Ocean Climate and present situation in summer 2008
Ingvaldsen, Randi; Sundby, Svein; Ådlandsvik, Bjørn (Havforskningsnytt, Working paper, 2008)In late winter 2008 record-high temperatures were observed in the Barents Sea, but the spring and summer temperatures fell below those observed in 2007. There is slightly more ice in the Arctic Ocean than in 2007, but a ... -
Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic
Kjesbu, Olav Sigurd; Sundby, Svein; Sandø, Anne Britt; Alix, Maud; Hjøllo, Solfrid Sætre; Tiedemann, Maik; Skern-Mauritzen, Mette; Junge, Claudia; Fossheim, Maria; Broms, Cecilie; Søvik, Guldborg; Zimmermann, Fabian; Nedreaas, Kjell Harald; Eriksen, Elena; Höffle, Hannes; Hjelset, Ann Merete; Kvamme, Cecilie; Reecht, Yves; Knutsen, Halvor; Aglen, Asgeir; Albert, Ole Thomas; Berg, Erik; Bogstad, Bjarte; Durif, Caroline; Halvorsen, Kim Aleksander Tallaksen; Høines, Åge Sigurd; Hvingel, Carsten; Johannesen, Edda; Johnsen, Espen; Moland, Even; Myksvoll, Mari Skuggedal; Nøttestad, Leif; Olsen, Erik Joel Steinar; Skaret, Georg; Skjæraasen, Jon Egil; Slotte, Aril; Staby, Arved; Stenevik, Erling Kåre; Stiansen, Jan Erik; Stiasny, Martina H.; Sundet, Jan Henry; Vikebø, Frode Bendiksen; Huse, Geir (Peer reviewed; Journal article, 2021)Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 fisheries resources—ranging from data-poor to data-rich stocks—in the ... -
In/out-flow of coastal water in Vestfjorden
Sundby, Svein (ICES CM Documents;1978/C:51, Working paper, 1978)Hydrographic sections in Vestfjorden, Northern Norway, during winter 1977 showed strong horizontal temperature gradients on the west side of the fjord indicating an outflow of cold coastal water. Analysis of sea thermograph ... -
Influence of bottom topography on the circulation at the continental shelf off northern Norway
Sundby, Svein (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1984)The three banks Sveinsgrunnen, Malangsgrunnen and Nordvestbanken, which lie off the coast of northern Norway, are separated by troughs. Synoptic hydrographic surveys and data from satellite-tracked buoys drogued in the ... -
Influence of ecosystem changes on harvestable resources at high latitudes.
Shamray, Evgeny; Huse, Geir; Trofimov, Aleksander; Sundby, Svein; Dolgov, Andrey; Skjoldal, Hein Rune; Sokolov, Konstantin; Jørgensen, Lis Lindal; Haug, Tore; Zabavnikov, Vladimir (IMR/PINRO Joint Report Series;2019 - 1, Research report, 2019)The 18th Russian-Norwegian Symposium, entitled “Influence of ecosystem changes on harvestable resources at high latitudes”, was held in Murmansk, Russia on 5–7 June 2018. The Symposium was organized by the Polar Research ... -
An Integrated Assessment of changes in the thermohaline circulation
Kuhlbrodt, Till; Rahmstorf, Stefan; Zickfeld, Kirsten; Vikebø, Frode; Sundby, Svein; Hofmann, Matthias; Link, Peter Michael; Bondeau, Alberte; Cramer, Wolfgang; Jaeger, Carlo (Journal article; Peer reviewed, 2009-03-27)This paper discusses the risks of a shutdown of the thermohaline circulation (THC) for the climate system, for ecosystems in and around the North Atlantic as well as for fisheries and agriculture by way of an Integrated ... -
Kartlegging av gytefeltene for norsk-arktisk torsk i Nord-Norge og beregning av eggproduksjonen i årene 1983-1985
Sundby, Svein; Bratland, Per (Fisken og havet, Research report, 1987)The population fecundity of Northeast-arctic cod were computed for the years 1983, 1984 and 1985. Repeated and detailed egg surveys were conducted at the spawning sites in Lofoten and along the coast of Troms and ... -
Klima i Norge 2100. Bakgrunnsmateriale til NOU Klimatilplassing
Hanssen-Bauer, Inger; Drange, Helge; Førland, Eirik J.; Roald, Lars A.; Børsheim, Knut Yngve; Hisdal, Hege; Lawrence, Deborah; Nesje, Atle; Sandven, Stein; Sorteberg, Asgeir; Sundby, Svein; Vasskog, Kristian; Ådlandsvik, Bjørn (Research report, 2009-09) -
Klima i Norge 2100. Bakgrunnsmateriale til NOU Klimatilplassing
Hanssen-Bauer, Inger; Drange, Helge; Førland, Eirik J.; Roald, Lars A.; Børsheim, Knut Yngve; Hisdal, Hege; Lawrence, Deborah; Nesje, Atle; Sandven, Stein; Sorteberg, Asgeir; Sundby, Svein; Vasskog, Kristian; Ådlandsvik, Bjørn (Research report, 2009-09) -
Klimaendringene - hva skjer i havet? [1]
Sundby, Svein (Havforskningsnytt;Nr. 2 - 2014, Working paper, 2014)