Browsing Brage IMR by Author "Knutsen, Tor"
Now showing items 41-60 of 66
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Multinational large scale krill synoptic survey in CCAMLR Area 48 in 2019-survey plan and protocol for consideration by SG-ASAM 2018
Krafft, Bjørn Arne; Bergstad, Odd Aksel; Knutsen, Tor; Skaret, Georg; Macaulay, Gavin (CCAMLR;SG-ASAM-18/07, Research report, 2018)The objective for the Multinational Large-Scale Krill Synoptic Survey in CCAMLR area 48 3 in 2019 is to provide an updated estimate of the biomass of Antarctic krill (Euphausia 4 superba) used in models to estimate sustainable ... -
Pelagiske økosystem i De nordiske hav - grunnlagsstudie knyttet til åpningsprosess for utforskning og utvinning av havbunnsmineraler på norsk kontinentalsokkel
Kutti, Tina; Mork, Kjell Arne; Chierici, Melissa; Børsheim, Knut Yngve; Bagøien, Espen; Knutsen, Tor; Broms, Cecilie; Klevjer, Thor A.; Strand, Espen; Gjøsæter, Harald; Stenevik, Erling Kåre; Høines, Åge Sigurd; Windsland, Kristin; Frie, Anne Kirstine Højholt (Rapport fra havforskningen;2021 - 41, Research report, 2021)Denne rapporten er en leveranse til bestillingen «Grunnlagsstudie: Pelagisk økosystem» fra Oljedirektoratet til Havforskningsinstituttet. Studien er bestilt i forbindelse med at regjeringen har igangsatt en prosess for ... -
Planktonforekomster over Svalbardbanken om vinteren: Akustiske registreringer og video-opptak fra en fjernstyrt undervannsfarkost (ROV)
Knutsen, Tor; Melle, Webjørn; Hassel, Arne; Dalen, John (Interne notat, Working paper, 1997)I forbindelse med konsekvensanalysen før eventuell oljeleting innenfor området Barentshavet-Nord er det gjennomført feltundersøkelser for å avdekke om det er et vesentlig gytefelt for polartorsk i Barentshavet. Undersøkelsene ... -
Potential implications on the pelagic fish and zooplankton community of artificially induced deep-water releases of oil and gas during DeepSpill_2000 – an innovative acoustic approach.
Knutsen, Tor; Serigstad, Bjørn (Fisken og havet;14-2001, Research report, 2001-12-15)During the DeepSpill_2000 field experiment (Johansen et al., 2001) oil and gas were artificially released on several occasions from a water depth of 844 meters at the Helland-Hansen site in the Norwegian sea. Prior to and ... -
Preliminary report from the sea-going workshop in Norway June 1993 on intercomparison and evaluation of methods for sampling and determination of zooplankton distribution and biomass
Skjoldal, Hein Rune; Wiebe, Peter H.; Knutsen, Tor; Postel, Lutz (ICES CM Documents;1993/L:45, Working paper, 1993)A sea-going workshop was arranged from 2 to 13 June 1993 in Storfjorden at Møre on the west coast of Norway. The workshop was a two-ship operation involving the Norwegian R/V "Johan Hjort" and the German R/V "A.V. Humboldt". ... -
Protocols for trawl sampling, recording of biological data, and hydrography for the 2019 international synoptic krill survey in Area 48
Knutsen, Tor; Krafft, Bjørn Arne; Renner, Angelika; Skaret, Georg; macaulay, gavin; Bergstad, Odd Aksel (CCAMLR;WG-EMM-18/23, Research report, 2018)Experience gained through participation in international programmes like BIOMASS and the CCAMLR 2000 Survey has demonstrated that standardization of equipment and methods is one of the most crucial steps for any successful ... -
Reaction of sandeel to seismic shooting: a field experiment and fishery statistics study
Hassel, Arne; Knutsen, Tor; Dalen, John; Skaar, Kristian; Østensen, Øivind; Haugland, Eli Kyrkjebø; Fonn, Merete; Høines, Åge S.; Misund, Ole Arve (Fisken og havet, Research report, 2003)The reaction to seismics of lesser sandeel (Ammodytes marinus) was investigated in the North Sea using steel cages to enclose the fish while burried in the sand. Three cages were exposed to seismic shooting from SV "Falcon ... -
Report from a krill focused survey with RV Kronprins Haakon and land-based predator work in Antarctica during 2018/2019
Krafft, Bjørn Arne; Bakkeplass, Kjell Gunnar; Berge, Terje; Biuw, Martin; Erices, Julio Alberto; Jones, Elizabeth Marie; Knutsen, Tor; Kubilius, Rokas; Kvalsund, Merete; Lindstrøm, Ulf; Macaulay, Gavin; Renner, Angelika; Rey, Alina; Søiland, Henrik; Wienerroither, Rupert; Ahonen, Heidi; Goto, Jade; Hoem, Nils; Huerta, Magdelena; Höfer, Juan; Iden, Oda; Jouanneau, William; Kruger, Lucas; Liholt, Håvard; Lowther, Andy; Makhado, Azwianewi B.; Mestre, Mireia; Narvestad, Audun; Oosthuisen, Chris; Rodrigues, Jose; Øyerhamn, Rune (Rapport fra havforskningen;2019 - 21, Research report, 2019)The primary objective for this krill research activity was twofold 1) to conduct a survey that provides updated estimates of the biomass and distribution of krill which are used in models to estimate sustainable yield in ... -
Schooling of the vertically migrating mesopelagic fish Maurolicus muelleri in light summer nights
Kaartvedt, Stein; Knutsen, Tor; Holst, Jens Christian (Journal article; Peer reviewed, 1998-09-03)Vertically migrating Maurolicus muelleri arrested their nocturnal ascent below the peak zooplankton concentrations during Light summer nights at 62 degrees N. At 69 degrees N, the behavior was further modified, with M, ... -
Sekundærproduksjon i Barentshavet (dyreplankton)
Knutsen, Tor; Dalpadado, Padmini; Hassel, Arne (Havets ressurser og miljø, Chapter, 2007)The average zooplankton biomass measured in August–September 2006 (8.6 g dry weight/m2) was above the long-term mean (7.14 g dry weight/m2), and has slightly increased since 2001 (5.85 g dry weight/m2). Atlantic water ... -
A seven-octave-bandwidth echo sounding system for application to fish and zooplankton
Foote, Kenneth G.; Knutsen, Tor; Atkins, Philip R.; Bongiovanni, Claire; Francis, David T. I.; Eriksen, Peter K.; Mortensen, Tom (Others, 1999) -
Simple, nonoptimal, real-time classifiers for euphausiid and copepod numerical density estimation
Atkins, Philip R.; Bongiovanni, Claire; Francis, David T. I.; Foote, Kenneth G.; Knutsen, Tor; Eriksen, Peter K.; Larsen, Mette Torp; Mortensen, Tom (Others, 2001) -
Spatial structuring in early life stage fish diversity in the Scotia Sea region of the Southern Ocean
Dornan, Tracey; Knutsen, Tor; Krafft, Bjørn Arne; Kvalsund, Merete; Mateos-Rivera, Alejandro; Tarling, Geraint A.; Wienerroither, Rupert; Hill, Simeon L. (Peer reviewed; Journal article, 2023)The fish community of the Scotia Sea is diverse and plays key roles in Antarctic food webs and biogeochemical cycling. However, knowledge of the spatial and community structure of their early life stages is limited, ... -
Spawning areas and spawning period of the North-east Arctic haddock [HELP 25}
Solemdal, Per; Knutsen, Tor; Bjørke, Herman (help;1989 nr. 25, Research report, 1989)Spawning of North-East Artic haddock occurs on the Norwegian continental slope. The location of the spawning grounds is, however, diffuse. This is mainly due to difficulties in identifying haddock eggs. In this work this ... -
Standing stock of Antarctic krill (Euphausia superba Dana, 1850) (Euphausiacea) in the Southwest Atlantic sector of the Southern Ocean, 2018-19
Krafft, Bjørn Arne; Macaulay, Gavin; Skaret, Georg; Knutsen, Tor; Bergstad, Odd A; Lowther, Andrew; Huse, Geir; Fielding, Sophie; Trathan, Philip; Murphy, Eugene; Choi, Seok-Gwan; Chung, Sangdeok; Han, Inwoo; Lee, Kyounghoon; Zhao, Xianyong; Wang, Xinliang; Ying, Yiping; Yu, Xiaotao; Demianenko, Kostiantyn; Podhornyi, Viktor; Vishnyakova, Karina; Pshenichnov, Leonid; Chuklin, Andrii; Shyshman, Hanna; Cox, Martin J; Reid, Keith; Watters, George M; Reiss, Christian S; Hinke, Jefferson T; Arata, Javier; Godø, Olav R; Hoem, Nils (Peer reviewed; Journal article, 2021)Estimates of the distribution and density of Antarctic krill (Euphausia superba Dana, 1850) were derived from a large-scale survey conducted during the austral summer in the Southwest Atlantic sector of the Southern Ocean ... -
Stimfisk - et viktig element i det dynamiske havmiljøet
van der Meeren, Gro; Aglen, Asgeir; Eriksen, Elena; Johannesen, Edda; Knutsen, Tor; Stenevik, Erling Kåre; Tjelmeland, Sigurd; Øien, Nils; Lorentsen, Svein-Håkon (Conference object, 2010-09-23) -
Stimfisk - et viktig element i det dynamiske havmiljøet
van der Meeren, Gro; Aglen, Asgeir; Eriksen, Elena; Johannesen, Edda; Knutsen, Tor; Stenevik, Erling Kåre; Tjelmeland, Sigurd; Øien, Nils; Lorentsen, Svein-Håkon (Conference object, 2010-09-23) -
Structure and functioning of four North Atlantic ecosystems - A comparative study
Melle, Webjørn Raunsgård; Klevjer, Thor A.; Drinkwater, Kenneth F.; Strand, Espen; Naustvoll, Lars Johan; Wiebe, Peter H.; Aksnes, Dag Lorents; Knutsen, Tor; Sundby, Svein; Slotte, Aril; Dupont, Nicolas; Salvanes, Anne Gro Vea; Korneliussen, Rolf; Huse, Geir (Peer reviewed; Journal article, 2020)The epi- and mesopelagic ecosystems of four sub-polar ocean basins, the Labrador, Irminger, Iceland and Norwegian seas, were surveyed during two legs from Bergen, Norway, to Nuuk, Greenland, and back to Bergen. The survey ... -
Toktrapport [12/11 - 30/11, 1996]
Knutsen, Tor ([Toktrapport/Havforskningsinstituttet];, Working paper, 1997-01-23) -
Toktrapport [21/4 - 15/5, 1987]
Knutsen, Tor; Solemdal, Per ([Toktrapport/Havforskningsinstituttet];, Working paper, 1988-06-05)