Blar i Brage IMR på forfatter "Nøttestad, Leif"
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Makrellstørja: Havets gull er tilbake i norske farvann!
Nøttestad, Leif (Conference object, 2014) -
Makrellstørjen er nå kommet tilbake i norske farvann
Nøttestad, Leif (Conference object, 2013) -
Migration behaviour of herring along the cold front in the Norwegian Sea in April 1997
Misund, Ole Arve; Fernö, Anders; Guenette, Sylvie; Mackinson, Steven; Melle, Webjørn; Nøttestad, Leif; Slotte, Aril (ICES CM Documents;1997/EE:12, Working paper, 1997)The behaviour of Norwegian spring spawning herring when migrating to the feeding areas in the Norwegian Sea in April was mapped by an acoustic survey in 1997. The distribution of herring was recorded by conventional echo ... -
Migration patterns in Norwegian spring-spawning herring: why young fish swim away from the wintering area in late summer
Kvamme, Cecilie; Nøttestad, Leif; Fernö, Anders; Misund, Ole Arve; Dommasnes, Are; Axelsen, Bjørn Erik; Dalpadado, Padmini; Melle, Webjørn (Journal article; Peer reviewed, 2003-03-04)Norwegian spring-spawning herring Clupea harengus make extensive feeding migrations in the Norwegian Sea during summer. At the end of the feeding season herring may meet conflicting demands between moving to areas with ... -
Panel-based Assessment of Ecosystem Condition of the Norwegian Sea Pelagic Ecosystem
Arneberg, Per; Siwertsson, Anna; Husson, Berengere; Børsheim, Knut Yngve; Fauchald, Per; Hjøllo, Solfrid Sætre; Høines, Åge Sigurd; Jones, Elizabeth Marie; Melle, Webjørn Raunsgård; Nøttestad, Leif; Planque, Benjamin; Skagseth, Øystein; Slotte, Aril; Solvang, Hiroko Kato; Stenevik, Erling Kåre (Rapport fra havforskningen;2023 -16, Research report, 2023)The System for Assessment of Ecological Condition, coordinated by the Norwegian Environment Agency, is intended to form the foundation for evidence-based assessments of the ecological condition of Norwegian terrestrial and ... -
Poleward spawning of Atlantic mackerel (Scomber scombrus) is facilitated by ocean warming but triggered by energetic constraints
dos Santos Schmidt, Thassya Christina; Slotte, Aril; Olafsdottir, Anna H.; Nøttestad, Leif; Jansen, Teunis; Jacobsen, Jan Arge; Bjarnason, Sigurvin; Lusseau, Susan Mærsk; Ono, Kotaro; Hølleland, Sondre Nedreås; Thorsen, Anders; Sandø, Anne Britt; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2023)The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf ... -
Poor feeding opportunities and reduced condition factor for salmon post-smolts in the Northeast Atlantic Ocean
Utne, Kjell Rong; Pauli, Beatriz Diaz; Haugland, Monika; Jacobsen, Jan Arge; Maoileidigh, Niall O´; Melle, Webjørn Raunsgård; Broms, Cecilie; Nøttestad, Leif; Holm, Marianne; Thomas, Katie; Wennevik, Vidar (Peer reviewed; Journal article, 2021)During the last few decades, many wild Atlantic salmon populations have declined dramatically. One possible contributing factor for the decline is reduced prey availability at sea. Here, we examine post-smolt diet and ... -
Presentation of the mackerel-ecosystem survey (IESSNS) 2. July - 12. August 2014
Nøttestad, Leif (Conference object, 2014) -
Prey selection of offshore killer whales Orcinus orca in the Northeast Atlantic in late summer: spatial associations with mackerel
Nøttestad, Leif; Sivle, Lise Doksæter; Krafft, Bjørn A.; Langård, Lise; Anthonypillai, Valantine; Bernasconi, Matteo; Langøy, Herdis; Fernö, Anders (Journal article; Peer reviewed, 2014-03-03)The traditional perception of prey species preference of killer whales Orcinus orca L. in the Northeast Atlantic has, to a large extent, been linked to herring Clupea harengus L. Few studies have investigated the feeding ... -
Recent changes in distribution and relative abundance of cetaceans in the Norwegian Sea and their relationship with potential prey
Nøttestad, Leif; Krafft, Bjørn Arne; Anthonypillai, Valentine; Bernasconi, Matteo; Langård, Lise; Mørk, Herdis Langøy; Fernö, Anders (Journal article; Peer reviewed, 2015) -
Sammenheng mellom geometriske dimensjoner og biomasse hos sildestimer under innvandring til overvintringsområdene
Nøttestad, Leif (Fisken og havet, Research report, 1996)Repeated acoustic measurements of size, density and biomass of herring schools were conducted using sonar and echosounder connected to echointegrator system (Simrad EY-500) in Vestfjorden, Ofotfjorden and Tysfjord in the ... -
Sjøfugl og marine økosystemer. Status for sjøfugl og sjøfuglenes næringsgrunnlag i Norge og på Svalbard
Fauchald, Per; Barrett, Robert; Bustnes, Jan Ove; Erikstad, Kjell E; Nøttestad, Leif; Skern-Mauritzen, Mette; Vikebø, Frode Bendiksen (NINA rapport;1161, Research report, 2015)Denne synteserapporten beskriver hvordan endringene og fluktuasjonene i økosystemene i norske havområder påvirker næringsforholdene for sjøfugl. Disse endringene har konsekven-ser for sjøfuglsamfunnene langs kysten, og ... -
Snake pipefish (Entelurus aequoreus) intrusion as a new species into the Barents Sea ecosystem.
Reeve, Magnus; Olsen, Erik; Nøttestad, Leif (ICES CM documents;2007/H:04, Working paper, 2007)The snake pipefish Entelurus aequoreus is a member of the Syngnathidae family. The open water species is distributed in the eastern Atlantic, from the Azores to Iceland and Norway, including the Baltic Sea. Concentrations ... -
A sonar study of the migration pattern of Norwegian spring-spawning herring (Clupea harengus L.) in July
Kvamme, Cecilie; Nøttestad, Leif; Fernö, Anders; Misund, Ole Arve; Dommasnes, Are; Axelsen, Bjørn Erik (ICES CM documents, Working paper, 2000)About 700 schools of Norwegian spring-spawning herring (Clupea harengus L.) were tracked by multi-beam sonar during transect surveys in the Norwegian Sea in July 1995 and 1996. This herring stock usually concentrates in ... -
Spatial and temporal overlap and trophic interactions between Atlantic Saithe (Pollachius virens) and Norwegian spring spawning herring (Clupea harengus) on herring spawning grounds
Slotte, Aril; Runde, Arne; Skaret, Georg; Axelsen, Bjørn Erik; Fernö, Anders; Johannessen, Arne; Nøttestad, Leif; Øvredal, Jan Tore (ICES CM documents, Working paper, 2005)Atlantic saithe (Pollachius virens) and Norwegian spring-spawning herring (Clupea harengus) represent two of the most abundant and ecologically important fish species in the Northeast Atlantic. The two species co-occur ... -
Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna
Huse, Geir; MacKenzie, Brian R.; Trenkel, Verena; Doray, Mathieu; Nøttestad, Leif; Oskarsson, Gudmundur (Journal article; Peer reviewed, 2015) -
Spennende forskningsnytt om sild og makrell pluss eksotiske bilder og film fra ekspedisjon i Sørishavet
Nøttestad, Leif (Conference object, 2014) -
Sverdfisken svømmer oftere til Norge
Nøttestad, Leif; Hauge, Marie; Sundby, Svein (Havforskningsnytt;Nr. 12 - 2014, Working paper, 2014) -
The challenge of the herring in the Norwegian Sea: making optimal collective spatial decision
Fernö, Anders; Melle, Webjørn; Misund, Ole Arve; Pitcher, Tony; Nøttestad, Leif; Mackinson, Steven; Hollingworth, Charles (ICES CM Documents;1996/H:15, Working paper, 1996)Herring are long-lived multiple spawners exhibiting strong variation in reproductive and recruitment success between years. They tend to adopt low-risk, preferred-conservative strategies; for example, shifts to alternative ... -
Toktgjennomføring og datagrunnlag for bestandsberegninger og rådgivning for makrellbestanden
Nøttestad, Leif (Conference object, 2014)