Blar i Brage IMR på forfatter "Nøttestad, Leif"
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Fangstprøvelotteriet 2021 - erfaringer og resultat
Høines, Åge Sigurd; Diaz, Justine Emmanuelle; Heggebakken, Lise; Hellenbrecht, Lea Marie; Johnsen, Espen; Kvamme, Cecilie; Nøttestad, Leif; Salthaug, Are; Skaret, Georg; Stenevik, Erling Kåre; Svendsen, Bjørn Vidar; Tonheim, Susanne; Otterå, Håkon Magne (Rapport fra havforskningen;2023 - 8, Research report, 2023)Etter at vi startet opp med fangstprøvelotteriet i 2018 har vi sett en gradvis og betydelig forbedring i prøvetakingen fra de kommersielle pelagiske fiskeriene. Vi ser likevel et stort forbedringspotensial framover siden ... -
Fangstprøvelotteriet 2022 - erfaringer og resultat
Skaret, Georg; Diaz, Justine Emmanuelle; Heggebakken, Lise; Hellenbrecht, Lea Marie; Høines, Åge Sigurd; Johnsen, Espen; Kvamme, Cecilie; Nøttestad, Leif; Salthaug, Are; Stenevik, Erling Kåre; Svendsen, Bjørn Vidar; Tonheim, Susanne; Otterå, Håkon Magne (Rapport fra havforskningen;2023 - 60, Research report, 2023)Etter at vi startet opp med fangstprøvelotteriet i 2018 har vi sett en gradvis og betydelig forbedring i prøvetakingen fra de kommersielle pelagiske fiskeriene, og i 2022 mottok vi totalt sett ca 70% av de bestilte prøvene. ... -
Feeding ecology of Atlantic mackerel (Scomber scombrus) in the Norwegian Sea
Langøy, Herdis; Nøttestad, Leif; Skaret, Georg; Broms, Cecilie; Fernö, Anders (ICES CM documents, Working paper, 2006)Previous studies on Atlantic mackerel (Scomber scombrus) feeding during the highly migratory summer period are scarce. In this study we present detailed diet analyses and investigations of prey selection for Atlantic ... -
Feeding Ecology of Northeast Atlantic Mackerel, Norwegian Spring-Spawning Herring and Blue Whiting in the Norwegian Sea.
Bachiller, Eneko; Skaret, Georg; Nøttestad, Leif; Slotte, Aril (Journal article; Peer reviewed, 2016-02-19)The Norwegian spring-spawning (NSS) herring (Clupea harengus), blue whiting (Micromesistius poutassou) and Northeast Atlantic (NEA) mackerel (Scomber scombrus) are extremely abundant pelagic planktivores that feed in the ... -
Feeding Hotspots and Distribution of Fin and Humpback Whales in the Norwegian Sea From 2013 to 2018.
Løviknes, Sunniva; Jensen, Knut Helge; Krafft, Bjørn Arne; Anthonypillai, Valentine; Nøttestad, Leif (Peer reviewed; Journal article, 2021)Fin whales (Balaenoptera physalus) and humpback whales (Megaptera novaeangliae) are commonly found in the Norwegian Sea during the summer months. Records from around 1995 to 2004 show that their distribution patterns were ... -
Felles trålmetode for å mengdemåle makrellbestanden
Valdemarsen, John Willy; Nøttestad, Leif (Havforskningsnytt;Nr. 8 - 2014, Working paper, 2014) -
First thorough assessment of de novo oocyte recruitment in a teleost serial spawner, the Northeast Atlantic mackerel (Scomber scombrus) case
dos Santos Schmidt, Thassya C.; Thorsen, Anders; Slotte, Aril; Nøttestad, Leif; Kjesbu, Olav S. (Peer reviewed; Journal article, 2021)The understanding of teleost fecundity type (determinate or indeterminate) is essential when deciding which egg production method should be applied to ultimately estimate spawning stock biomass. The fecundity type is, ... -
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 ... -
How and why acoustic detectability and catchability of herring change with individual motivation and physiological state in a variable environment: a multi-scale study on a local herring population in southwestern Norway
Langård, Lise; Nøttestad, Leif; Johannessen, Arne; Fernö, Anders; Øvredal, Jan Tore; Skaret, Georg; Nilsson, Gro N.; Vabø, Rune (ICES CM documents, Working paper, 2006)The understanding of distribution and aggregation in herring (Clupea harengus) can be enhanced by integrated multi-scale studies in small ecosystems. Hydro-acoustics, underwater cameras, herring and predator gillnet samples ... -
Hva skjer i havet? Økosystemet i Norskehavet under lupen
Nøttestad, Leif (Conference object, 2014) -
Hvordan påvirker varmere havområder de store fiskebestandene og våre fiskerier
Nøttestad, Leif (Conference object, 2013) -
IESSNS international mackerel-ecosystem survey (2015832) 26.06.2015-28.07.2015
Grimsbø, Endre; Nøttestad, Leif (Research report, 2015)Ecosystem cruise with abundance estimation and biological sampling of Northeast Atlantic (NEA) mackerel, Norwegian spring-spawning (NSS) herring and North Sea herring. Predetermined station net for systematic biological ... -
Impact of herring spawning behaviour on acoustic abundance estimates
Skaret, Georg; Fernö, Anders; Nøttestad, Leif; Johannessen, Arne; Axelsen, Bjørn Erik (ICES CM documents, Working paper, 2001)Spawning dynamics of Norwegian spring spawning herring was studied in south western Norway 29 March to 3 April 2000 using hydroacoustics. The horizontal distribution of the spawning layers shifted in a south-easterly ... -
Influence of sea temperature on herring distribution and migration in the Norwegian Sea in April 1997
Nøttestad, Leif; Misund, Ole Arve; Orvik, Kjell Arild; Ulvestad, Bente Hoddevik (ICES CM Documents;1999/M:3, Working paper, 1999)After spawning at the west coast of Norway, the Norwegian spring spawning herring migrates northwestwards into the Norwegian Sea to feed in early April. The herring enters areas with distinct oceanographic features both ... -
Institute of Marine Research - an overview
Nøttestad, Leif (Conference object, 2015) -
Killer whales (Orcinus orca L.) and saithe (Pollachius virens L.) trap herring (Clupea harengus L.) in shallow water by taking advantage of steep bottom topography
Nøttestad, Leif (ICES CM Documents;2002/N:20, Working paper, 2002)Whales and fish use a wide range of hunting tactics in order to catch their prey. Predatorprey interactions have been seen during the massive wintering of herring (Clupea harengus) in steep bottomed topography in Lofoten, ... -
A length-based hypothesis for feeding migrations in pelagic fish
Nøttestad, Leif; Giske, Jarl; Holst, Jens Christian; Huse, Geir (Journal article; Peer reviewed, 1999)We evaluated the costs and benefits of long-distance horizontal migration by pelagic planktivores, Atlantic herring (Clupea harengus), blue whiting (Micromesistius poutassou), mackerel (Scomber scombrus), and capelin (Mallotus ... -
Makrell - Hvor stor er bestanden og hvilken innvirkning har den på økosystemet
Nøttestad, Leif (Conference object, 2014) -
Makrellens grenseløse sprell - ekspanderende forskning midt i makrellkrigen
Nøttestad, Leif (Conference object, 2012) -
Makrellforskning og makrellbestanden
Nøttestad, Leif (Conference object, 2014-05-20)