Browsing Articles by Author "Asplin, Lars"
Now showing items 1-20 of 23
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Climatic and environmental factors influencing occurrence and distribution of macroalgae – a fjord gradient revisited
Sjøtun, Kjersti; Husa, Vivian; Asplin, Lars; Sandvik, Anne Dagrun (Journal article; Peer reviewed, 2015-07-21)During the last decades, trends of increasing sea water temperatures and precipitation have been observed in the North Atlantic. Increasing sea water temperatures are expected to have strong effects on coastal benthic ... -
Climatic and environmental factors influencing occurrence and distribution of macroalgae – a fjord gradient revisited
Sjøtun, Kjersti; Husa, Vivian; Asplin, Lars; Sandvik, Anne Dagrun (Peer reviewed; Journal article, 2015) -
Currents on the northern shelf of the Yellow Sea
Lin, Fan; Asplin, Lars; Budgell, William Paul; Wei, Hao; Fang, Jianguang (Journal article; Peer reviewed, 2019)The currents of the northern shelf of the Yellow Sea are investigated using observations of current and hydrography and numerical current model results. The Regional Ocean Model System (ROMS) with a horizontal resolution ... -
Dispersion of salmon lice in the Hardangerfjord
Asplin, Lars; Johnsen, Ingrid A.; Sandvik, Anne Dagrun; Albretsen, Jon; Sundfjord, Vibeke; Aure, Jan; Boxaspen, Karin (Journal article; Peer reviewed, 2013-10-15)The abundance of salmon lice in the Hardangerfjord is potentially large enough to be a threat to the wild fish stocks of the fjord. The salmon louse spends a period of 2–4 weeks in its planktonic stages drifting in the ... -
Evaluation of a national operational salmon lice monitoring system - from physics to fish
Myksvoll, Mari Skuggedal; Sandvik, Anne Dagrun; Albretsen, Jon; Asplin, Lars; Johnsen, Ingrid Askeland; Karlsen, Ørjan; Kristensen, Nils Melsom; Melsom, Arne; Skardhamar, Jofrid; Ådlandsvik, Bjørn (Journal article; Peer reviewed, 2018)The Norwegian government has decided that the aquaculture industry shall grow, provided that the growth is environmentally sustainable. Sustainability is scored based on the mortality of wild salmonids caused by the parasitic ... -
Going With the Flow – Population Genetics of the Kelp Saccharina latissima (Phaeophyceae, Laminariales)
Ribeiro, Pedro A; Næss, Tonje; Dahle, Geir; Asplin, Lars; Meland, Kenneth; Fredriksen, Stein; Sjøtun, Kjersti (Peer reviewed; Journal article, 2022)Saccharina latissima is the most important habitat-forming kelp in sheltered areas of North-Atlantic, and there is also an increasing interest in cultivation and utilization of S. latissima. The cultivation activity may ... -
Going With the Flow – Population Genetics of the Kelp Saccharina latissima (Phaeophyceae, Laminariales)
Ribeiro, Pedro Miguel de Azevedo; Næss, Tonje; Dahle, Geir; Asplin, Lars; Meland, Kenneth; Fredriksen, Stein; Sjøtun, Kjersti (Peer reviewed; Journal article, 2022)Saccharina latissima is the most important habitat-forming kelp in sheltered areas of North-Atlantic, and there is also an increasing interest in cultivation and utilization of S. latissima. The cultivation activity may ... -
High resolution modeling of aluminium transport in a fjord estuary with focus on mean circulation and irregular flow events
Simonsen, Magne; Albretsen, Jon; Sætra, Øyvind; Asplin, Lars; Lind, Ole Christian; Teien, Hans-Christian (Peer reviewed; Journal article, 2023)Environmental impact assessments of trace metals and radionuclides in estuarine waters will benefit from numerical transport models that can provide detailed and accurate predictions of concentrations of harmful physico-chemical ... -
The hydrodynamic foundation for salmon lice dispersion modeling along the Norwegian coast
Asplin, Lars; Albretsen, Jon; Johnsen, Ingrid A.; Sandvik, Anne Dagrun (Peer reviewed; Journal article, 2020)Norway has complicated dynamics in the coastal ocean and in the fjords. In this area is also the largest salmon aquaculture industry in the world. The salmon industry is valuable for Norwegian economy worth more than 60 ... -
Impact of hatch-date on early life growth and survival of Mueller's pearlside (Maurolicus Muelleri) larvae, and life-history consequences
Folkvord, Arild; Gundersen, Geir; Albretsen, Jon; Asplin, Lars; Kaartvedt, Stein; Giske, Jarl (Journal article, 2015) -
Linking bacterial community structure to advection and environmental impact along a coast-fjord gradient of the Sognefjord, western Norway
Storesund, Julia Endresen; Sandaa, Ruth-Anne; Thingstad, T. Frede; Asplin, Lars; Albretsen, Jon; Erga, Svein Rune (Peer reviewed; Journal article, 2017) -
Modelled salmon lice dispersion and infestation patterns in a sub-arctic fjord
Skardhamar, Jofrid; Albretsen, Jon; Sandvik, Anne Dagrun; Lien, Vidar Surén; Myksvoll, Mari Skuggedal; Johnsen, Ingrid Askeland; Asplin, Lars; Ådlandsvik, Bjørn; Halttunen, Elina; Bjørn, Pål Arne (Journal article; Peer reviewed, 2018)Salmon lice infestation is a major challenge for the aquaculture industry in Norway, threatening wild salmonid populations and causing welfare problems for farmed salmon. Lice dispersion and infestation patterns are simulated ... -
Nearby farms are a source of lice for wild salmonids: a reply to Jansen et al. (2016)
Serra-Llinares, Rosa Maria; Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Asplin, Lars (Journal article; Peer reviewed, 2016-05-17)Jansen et al. (2016; Aquacult Environ Interact 8:349-350) question the regression analysis presented in Serra-Llinares et al. (2014; Aquacult Environ Interact 5:1-16), which correlates lice abundances on farmed and wild ... -
New validation method for hydrodynamic fjord models applied in the Hardangerfjord, Norway
Dalsøren, Stig B.; Albretsen, Jon; Asplin, Lars (Peer reviewed; Journal article, 2020)We introduce a new intuitive evaluation method for comparison of fjord model results and current measurements. The approach is tested using high resolution model simulations and measurements in the Hardangerfjord, a large ... -
Optimal estimation of lice release from aquaculture based on ambient temperatures
Johnsen, Ingrid A.; Stien, Lars Helge; Sandvik, Anne Dagrun; Asplin, Lars; Oppedal, Frode (Peer reviewed; Journal article, 2020)Models for mapping and forecasting infective pressure from salmon louse Lepeophtheirus salmonis larvae are of major importance in the Norwegian government’s management of salmonid aquaculture. These models use site-reported ... -
Rapid water temperature variations at the northern shelf of the Yellow Sea
Asplin, Lars; Lin, Fan; Budgell, Paul; Strand, Øivind (Peer reviewed; Journal article, 2021)During summer, there is great spatial variability in bottom water temperature on the northern shelf of the Yellow Sea. This variability is associated with a thermal front along the shelf. Oscillatory currents from semidiurnal ... -
Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
Johnsen, Ingrid Askeland; Asplin, Lars; Sandvik, Anne Dagrun; Serra-Llinares, Rosa Maria (Journal article; Peer reviewed, 2016-02-02)The abundance and distribution of salmon lice Lepeophtheirus salmons originating from fish farms in a northern Norwegian fjord during the summer of 2010 was investigated by means of a numerical model, underpinned by field ... -
Salmon lice infection on wild salmonids in marine protected areas: an evaluation of the Norwegian ‘National Salmon Fjords
Serra-Llinares, Rosa Maria; Bjørn, Pål Arne; Finstad, Bengt; Nilsen, Rune; Harbitz, Alf; Berg, Marius; Asplin, Lars (Journal article; Peer reviewed, 2014-02-05)In Norway, 29 fjords and 52 rivers have been designated for protection in order to prevent the infection of important populations of wild salmonids with salmon lice of farm origin. We evaluated the effect of this protection ... -
Sea trout adapt their migratory behaviour in response to high salmon lice concentrations
Halttunen, Elina; Gjelland, Karl Øystein; Hamel, Sandra; Serra-Llinares, Rosa Maria; Nilsen, Rune; Arechavala-Lopez, Pablo; Skardhamar, Jofrid; Johnsen, Ingrid Askeland; Asplin, Lars; Karlsen, Ørjan; Bjørn, Pål Arne; Finstad, Bengt (Peer reviewed; Journal article, 2017)Sea trout face growth – mortality trade-offs when entering the sea to feed. Salmon lice epizootics resulting from aquaculture have shifted these trade-offs, as salmon lice might both increase mortality and reduce growth ... -
Small-scale genetic structure in a marine population in relation to water circulation and egg characteristics
Ciannelli, Lorenzo; Knutsen, Halvor; Olsen, Esben Moland; Espeland, Sigurd Heiberg; Asplin, Lars; Jelmert, Anders; Knutsen, Jan Atle; Stenseth, Nils Christian (Journal article; Peer reviewed, 2010-10)Until the last decade it was assumed that most marine species have pronounced gene flow over vast areas, largely because of their potential for dispersal during early life stages. However, recent genetic, modeling, and ...