Browsing Brage IMR by Author "Albretsen, Jon"
Now showing items 81-92 of 92
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Stillehavsøsters i Norden. Datainnsamling og bestandsvurderinger som grunnlag for forvaltning og høsting av nordiske bestander av stillehavsøsters, Crassostrea gigas
Mortensen, Stein; Laugen, Ane T; Strand, Åsa; Dolmer, Per; Naustvoll, Lars Johan; Jelmert, Anders; Albretsen, Jon; Broström, Göran; Gustafsson, Malin; Durkin, Alice; Esaghoolian Khogyane, Sevan; Partoft, Hanna; Bøgwald, Mats (TemaNord, Research report, 2022) -
Strøm i fjorder - strømkatalog og smittespredning
Asplin, Lars; Sandvik, Anne Dagrun; Albretsen, Jon (Havforskningsnytt;Nr. 9 - 2011, Working paper, 2011)Strøm, saltholdighet og temperatur er grunnleggende parametre som har en direkte innvirkning på økosystemene i fjordene. Ved hjelp av et nytt modellsystem som er under utvikling, vil vi både kunne beskrive hvordan strømmen ... -
Temperature-associated habitat selection in a cold-water marine fish.
Freitas, Carla; Olsen, Esben Moland; Knutsen, Halvor; Albretsen, Jon; Moland, Even (Journal article; Peer reviewed, 2015-11-23) -
The abundance of kelp is modified by the combined impact of depth, waves and currents
Bekkby, Trine; Smit, Cecilie; Gundersen, Hege; Rinde, Eli; Steen, Henning; Tveiten, Lise Ann; Gitmark, Janne Kim; Fredriksen, Stein; Albretsen, Jon; Christie, Hartvig C (Journal article; Peer reviewed, 2019)This study analyses the combined impact of two types of ocean water flow, wave exposure and ocean currents, on kelp Laminaria hyperborea abundance, taking other environmental co-variables into account. The dataset covers ... -
The Northeast Greenland shelf as a potential habitat for the Northeast Arctic cod
Strand, Kjersti Opstad; Sundby, Svein; Albretsen, Jon; Vikebø, Frode Bendiksen (Peer reviewed; Journal article, 2017) -
A tidally driven fjord-like strait close to an amphidromic region
Erenbjerg, Sissal Vágsheyg; Albretsen, Jon; Simonsen, Knud; Olsen, Erna Lava; Kaas, Eigil; Hansen, Bogi (Peer reviewed; Journal article, 2021)The strait studied in this paper, “Sundalagið Norður”, is the northern part of a narrow body of seawater separating the two largest islands in the Faroe Islands (Faroes). It has shallow sills in both ends and considerably ... -
Towards direct evidence of the effects of salmon lice (Lepeophtheirus salmonis Kr?yer) on sea trout (Salmo trutta L.) in their natural habitat: proof of concept for a new combination of methods
Serra Llinares, Rosa Maria; Freitas, Carla; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Albretsen, Jon; Bøhn, Thomas; Karlsen, Ørjan; Bjørn, Pål Arne (Journal article; Peer reviewed, 2018)Studies addressing the impact of salmon lice (Lepeophtheirus salmonis Krøyer) on sea trout in their natural habitat are scarce and mostly limited to prophylaxis-based experiments. The main drawbacks with this approach are ... -
Trans-polar drift-pathways of riverine European microplastic
Huserbråten, Mats Brockstedt Olsen; Hattermann, Tore; Broms, Cecilie; Albretsen, Jon (Peer reviewed; Journal article, 2022)High concentrations of microplastic particles are reported across the Arctic Ocean–yet no meaningful point sources, suspension timelines, or accumulation areas have been identified. Here we use Lagrangian particle advection ... -
Truet ålegressforekomst i indre Viksfjord, Larvik. Undersøkelser 2011-2013 i forbindelse med skjøtsel
Moy, Frithjof; Albretsen, Jon; Bodvin, Torjan; Naustvoll, Lars-Johan; Ohldieck, Martin (Rapport fra Havforskningen;Nr. 21-2014, Working paper, 2014-06-01)Viksfjorden, Larvik kommune, huser store ålegressforekomster av nasjonal viktighet, samt verdifulle grunne bløtbunnsområder og naturvernområder, inkludert et fuglereservat. Samtidig truer årvise oppblomstringer av ... -
Using Spatial Validity and Uncertainty Metrics to Determine the Relative Suitability of Alternative Suites of Oceanographic Data for Seabed Biotope Prediction. A Case Study from the Barents Sea, Norway
Dolan, Margaret; Ross, Rebecca; Albretsen, Jon; Skardhamar, Jofrid; Gonzalez-Mirelis, Genoveva; Bellec, Valerie Karin; Buhl-Mortensen, Pål; Bjarnadóttir, Lilja Rún (Peer reviewed; Journal article, 2021)The use of habitat distribution models (HDMs) has become common in benthic habitat mapping for combining limited seabed observations with full-coverage environmental data to produce classified maps showing predicted habitat ... -
Utredning av behovet for å redusere tilførslene av nitrogen til Ytre Oslofjord
Staalstrøm, Andre; Walday, Mats Gunnar; Vogelsang, Christian; Frigstad, Helene; Borgersen, Gunhild; Albretsen, Jon; Naustvoll, Lars Johan (NIVA-rapport, Research report, 2021)I store deler av Oslofjorden er det høye konsentrasjoner av nitrogen i vannmassene. I Frierfjorden, Tønsberg, Drammensfjorden, Mossesundet, Hvaler og Iddefjorden klassifiseres tilstanden til «moderat» eller dårlig for ... -
Utredning av program for overvåking av klimaendringseffekter i norske kyst- og havområder
Mork, Kjell Arne; Naustvoll, Lars-Johan; Albretsen, Jon; Ingvaldsen, Randi (Fisken og havet;5-2012, Research report, 2012-10-09)Existing monitoring programmes have, in several cases, often started from projects with focus on process studies and also as a short-term activity. Thus, the present monitoring programmes are often limited in terms of ...