Blar i Brage IMR på forfatter "Wennevik, Vidar"
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Forslag til førstegenerasjons målemetode for miljøeffekt (effektindikatorer) med hensyn til genetisk påvirkning fra oppdrettslaks til villaks, og påvirkning av lakselus fra oppdrett på viltlevende laksefiskbestander
Taranger, Geir Lasse; Svåsand, Terje; Bjørn, Pål Arne; Jansen, P.A.; Heuch, P. A.; Grøntvedt, Randi Nygaard; Asplin, Lars; Skilbrei, Ove; Glover, Kevin A.; Skaala, Øystein; Wennevik, Vidar; Boxaspen, Karin (Rapport fra Havforskningen;Nr. 13 - 2012, Working paper, 2012)Havforskningsinstituttet (HI) har sammen med Veterinærinstituttet (VI) utarbeidet forslag til førstegenerasjons målemetode for miljøeffekt (effektindikatorer) med hensyn til genetisk påvirkning fra oppdrettslaks til ... -
The future looks like the past: Introgression of domesticated Atlantic salmon escapees in a risk assessment framework
Glover, Kevin; Wennevik, Vidar; Hindar, Kjetil; Skaala, Øystein; Fiske, Peder; Solberg, Monica Favnebøe; Diserud, Ola Håvard; Svåsand, Terje; Karlsson, Sten; Berg Andersen, Lasse; Grefsrud, Ellen Sofie (Peer reviewed; Journal article, 2020)Escapes of domesticated fish from aquaculture, followed by interbreeding with wild conspecifics, represent a threat to the genetic integrity and evolutionary trajectory of natural populations. Approximately fifty years of ... -
Genetic introgression of farmed salmon in native populations: quantifying the relative influence of population size and frequency of escapees
Heino, Mikko; Svåsand, Terje; Wennevik, Vidar; Glover, Kevin (Journal article; Peer reviewed, 2015-02-11)Farmed escapees may threaten the genetic integrity of native salmon populations through interbreeding. However, introgression requires survival until maturation, successful reproduction and successful early development. ... -
Genetic screening of farmed Atlantic salmon escapees demonstrates that triploid fish display reduced migration to freshwater
Glover, Kevin; Bos, J. B.; Urdal, Kurt; Madhun, Abdullah Sami; Sørvik, Anne Grete Eide; Unneland, Laila; Seliussen, Bjørghild Breistein; Skaala, Øystein; Skilbrei, Ove; Tang, Y.; Wennevik, Vidar (Journal article; Peer reviewed, 2016-02-09)Each year, hundreds of thousands of farmed Atlantic salmon escape from fish farms into the wild. Some of these escapees enter freshwater, and manage to interbreed with native populations. To hinder further genetic introgression ... -
Genetiske analyser av aure i Gloppenelva
Quintela, Maria; Sægrov, Harald; Dahle, Geir; Glover, Kevin Alan; Wennevik, Vidar (Rapport fra havforskningen;2023 - 19, Research report, 2023)I Gloppenelva ble det åpnet en laksetrapp i Eidsfossen i 1972, men trappen ble stengt i 2014 etter store skader under en flomhendelse, og det er ikke avklart om trappen skal restaureres. Inntil 1972 var Eidsfossen ... -
Geographic distribution, abundance, diet, and body size of invasive pink salmon (Oncorhynchus gorbuscha) in the Norwegian and Barents Seas, and in Norwegian rivers
Diaz Pauli, Beatriz; Berntsen, Johan Henrik Hårdensson; Thorstad, Eva Bonsak; Homrum, Eydna í; Lusseau, Susan Mærsk; Wennevik, Vidar; Utne, Kjell Rong (Peer reviewed; Journal article, 2022)We report for the first time the geographic distribution, abundance, diet, and body size of invasive pink salmon (Oncorhynchus gorbuscha) in the Norwegian and Barents Seas and Norwegian coast and rivers. We found that pink ... -
Havbruk til havs – Fysiske miljøbetingelser og økosystempåvirkning
Albretsen, Jon; Beck, Alexander Christian; Biuw, Martin; Huserbråten, Mats Brockstedt Olsen; Kutti, Tina; Kvamme, Bjørn Olav; Skagseth, Øystein; Utne, Kjell Rong; Vikebø, Frode Bendiksen; Wennevik, Vidar (Rapport fra havforskningen;2019 - 41, Research report, 2019)Nærings- og fiskeridepartementet ber om kunnskapsinnspill for å vurdere egnede lokaliteter for havbruk til havs. Fiskeridirektoratet har i den sammenheng bedt Havforskningsinstituttet om å bidra på fire områder; i) Krav ... -
Håndbok i torskeoppdrett : stamfiskhold og yngelproduksjon
Holm, Jens Christian; Svåsand, Terje; Wennevik, Vidar (Book, 1991-01) -
Health monitoring of wild anadromous salmonids in seawater in Norway
Madhun, Abdullah Sami; Isachsen, Cecilie Helen; Omdal, Linn Maren; Einen, Ann Cathrine Bårdsgjære; Wennevik, Vidar; Svåsand, Terje; Karlsbakk, Egil (Rapport fra Havforskningen;Nr. 17-2014, Working paper, 2014-05-01) -
Høst- og vinterlaksen i Finnmark; hvor kommer den fra?
Svenning, Martin; Wennevik, Vidar; Vähä, Juha-Pekka; Prusov, Sergei; Niemelä, Eero (NINA rapport;789, Research report, 2012)Under laksefisket i Varangerfjorden på senhøsten i 2007 og 2009, samt på vinteren i 2008, ble det fanget 87 laksefisk, derav 71 villaks, 10 oppdrettslaks, 3 regnbueørret og 3 hybrider mellom laks og ørret. Det ble rapportert ... -
Impacts of a Changing Ecosystem on the Feeding and Feeding Conditions for Atlantic Salmon During the First Months at Sea
Utne, Kjell Rong; Skagseth, Øystein; Wennevik, Vidar; Broms, Cecilie; Melle, Webjørn Raunsgård; Thorstad, Eva Bonsak (Peer reviewed; Journal article, 2022)During the last decades, many wild Atlantic salmon populations have declined dramatically. One hypothesis for an observed reduction in salmon marine growth and survival is reduced abundance of prey. However, the effect of ... -
Inferring Atlantic salmon post-smolt migration patterns using genetic assignment
Harvey, Alison C.; Sanchez, Maria Quintela; Glover, Kevin; Karlsen, Ørjan; Nilsen, Rune; Skaala, Øystein; Sægrov, Harald; Kolås, Steinar; Knutar, Sofie; Wennevik, Vidar (Journal article; Peer reviewed, 2019)Understanding migratory patterns is important for predicting and mitigating unwanted consequences of environmental change or anthropogenic challenges on vulnerable species. Wild Atlantic salmon undergo challenging migrations ... -
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations
Jørgensen, Katarina Mariann; Wennevik, Vidar; Sørvik, Anne Grete Eide; Unneland, Laila; Prusov, Sergey; Ayllon, Fernando; Glover, Kevin (Journal article; Peer reviewed, 2018)Fish may display variations in ploidy, including three sets of chromosomes, known as triploidy. A recent study revealed a frequency of ~ 2% spontaneous (i.e., non-intentional) triploidy in domesticated Atlantic salmon ... -
Life history genomic regions explain differences in Atlantic salmon marine diet specialization
Aykanat, Tutku; Rasmussen, Martin; Ozerov, Mikhail; Niemelä, Eero; Paulin, Lars; Vähä, Juha-Pekka; Hindar, Kjetil; Wennevik, Vidar; Pedersen, Torstein; Svenning, Martin; Primmer, Craig R. (Peer reviewed; Journal article, 2020) -
Long-term monitoring of a brown trout (Salmo trutta) population reveals kin-associated migration patterns and contributions by resident trout to the anadromous run
Duval, Eloïse; Skaala, Øystein; Quintela, María; Dahle, Geir; Delaval, Aurelian; Wennevik, Vidar; Glover, Kevin A.; Hansen, Michael M. (Dataset, 2021)This is the final dataset used in the Duval et al. (in review) study “Long-term monitoring of a brown trout (Salmo trutta) population reveals kin-associated migration patterns and contributions by resident trout to the ... -
Long-term monitoring of a brown trout (Salmo trutta) population reveals kin-associated migration patterns and contributions by resident trout to the anadromous run
Duval, Eloïse; Skaala, Øystein; Sanchez, Maria Quintela; Dahle, Geir; Delaval, Aurelien Nicolas; Wennevik, Vidar; Glover, Kevin Alan; Hansen, Michael Möller (Peer reviewed; Journal article, 2021)In species showing partial migration, as is the case for many salmonid fishes, it is important to assess how anthropogenic pressure experienced by migrating individuals affects the total population. We focused on brown ... -
Natural and anthropogenic drivers of escaped farmed salmon occurrence and introgression into wild Norwegian Atlantic salmon populations
Diserud, Ola Håvard; Fiske, Peder; Karlsson, Sten; Glover, Kevin Alan; Næsje, Tor; Aronsen, Tonje; Bakke, Gunnar O; Barlaup, Bjørn Torgeir; Erkinaro, J.; Florø-Larsen, Bjørn; Foldvik, Anders; Heino, Mikko Petteri; Kanstad-Hanssen, Øyvind; Lo, Håvard; Lund, Roar Asbjørn; Muladal, R.; Niemela, E.; Økland, Finn; Østborg, Gunnel Marie; Otterå, Håkon Magne; Skaala, Øystein; Skoglund, Helge; Solberg, Ingrid; Solberg, Monica Favnebøe; Sollien, Vegard Pedersen; Sægrov, Harald; Urdal, Kurt; Wennevik, Vidar; Hindar, Kjetil (Peer reviewed; Journal article, 2022)Marine aquaculture of Atlantic salmon (Salmo salar) is a relatively new industry where breeding programs have led to rapid genetic change in the captive populations that were built up alongside conspecific wild individuals. ... -
Novel large-scale mapping highlights poor state of sea trout populations
Fiske, Peder; Forseth, Torbjørn; Thorstad, Eva Bonsak; Bakkestuen, Vegar; Einum, Sigurd; Falkegård, Morten; Garmo, Øyvind A.; Garseth, Åse Helen; Skoglund, Helge; Solberg, Monica Favnebøe; Utne, Kjell Rong; Vollset, Knut; Vøllestad, Leif Asbjørn; Wennevik, Vidar (Peer reviewed; Journal article, 2024)1. The state of sea trout in 1251 Norwegian watercourses was assessed based on a scoring system for human pressures, abundance data, and local knowledge. 2. Over 16,000 km of rivers and lakes were available to sea trout ... -
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 ... -
Population genetic analysis reveals a geographically limited transition zone between two genetically distinct Atlantic salmon lineages in Norway
Wennevik, Vidar; Sanchez, Maria Quintela; Skaala, Øystein; Verspoor, Eric; Prusov, Sergey; Glover, Kevin (Journal article; Peer reviewed, 2019)Atlantic salmon is characterized by a high degree of population genetic structure throughout its native range. However, while populations inhabiting rivers in Norway and Russia make up a significant proportion of salmon ...