Blar i Brage IMR på forfatter "Halvorsen, Kim Aleksander Tallaksen"

Viser treff 1-20 av 35

    • A contrastive learning approach for individual re-identification in a wild fish population 

      Olsen, Ørjan Langøy; Sørdalen, Tonje Knutsen; Goodwin, Morten; Malde, Ketil; Knausgård, Kristian Muri; Halvorsen, Kim Aleksander Tallaksen (Peer reviewed; Journal article, 2023)
      In both terrestrial and marine ecology, physical tagging is a frequently used method to study population dynamics and behavior. However, such tagging techniques are increasingly being replaced by individual re-identification ...

    • Aktiv forvaltning av marine ressurser - Frøya og Hitra - Arbeidsrapport 2017-2018 

      Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Albretsen, Jon; Halvorsen, Kim Aleksander Tallaksen; Søvik, Guldborg; Grefsrud, Ellen Sofie; Ottesen, Dag (Rapport fra havforskningen;2019 - 14, Research report, 2019)
      Prosjektet ‘Aktiv forvaltning av marine ressurser- Frøya og Hitra’ ble formelt startet opp høsten 2017. Den overordnete målsetting med prosjektet er å etablere en solid kunnskapsplattform for å sikre de marine verdiene og ...

    • Aktiv forvaltning av marine ressurser - Frøya og Hitra - Sluttrapport 

      Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Søvik, Guldborg; Albretsen, Jon; Kleiven, Portia Joy Nillos; Zimmermann, Fabian; Grefsrud, Ellen Sofie; Halvorsen, Kim Aleksander Tallaksen; Vie, Ola (Rapport fra havforskningen;2021 - 14, Research report, 2021)
      Prosjektet ‘Aktiv forvaltning av marine ressurser- Frøya og Hitra’ ble formelt startet opp høsten 2017. Den overordnete målsetningen med prosjektet er å etablere en solid kunnskapsplattform for å sikre de marine verdiene ...

    • Assessment of the risk to Norwegian biodiversity from import of wrasses and other cleaner fish for use in aquaculture. Opinion of the Panel on Alien Organisms and Trade in Endangered Species of the Norwegian Scientific Committee for Food and Environment 

      Rueness, Eli Knispel; Berg, Paul Ragnar; Gulla, Snorre; Halvorsen, Kim Aleksander Tallaksen; Järnegren, Johanna; Malmstrøm, Martin; Mo, Tor Atle; Rimstad, Espen; de Boer, Hugo; Eldegard, Katrine; Hindar, Kjetil; Hole, Lars Robert; Kausrud, Kyrre; Kirkendall, Lawrence R.; Måren, Inger Elisabeth; Nilsen, Erlend Birkeland; Thorstad, Eva Bonsak; Nielsen, Anders; Velle, Gaute (VKM Report, Research report, 2019)

    • “A cleaner break”: Genetic divergence between geographic groups and sympatric phenotypes revealed in ballan wrasse (Labrus bergylta) 

      Seljestad, Gaute; Sanchez, Maria Quintela; Faust, Ellika; Halvorsen, Kim Aleksander Tallaksen; Besnier, Francois; Jansson, Eeva; Dahle, Geir; Knutsen, Halvor; André, Carl; Folkvord, Arild; Glover, Kevin (Peer reviewed; Journal article, 2020)
      Capture and long‐distance translocation of cleaner fish to control lice infestations on marine salmonid farms has the potential to influence wild populations via overexploitation in source regions, and introgression in ...

    • Cleaner fish escape salmon farms and hybridize with local wrasse populations 

      Faust, Ellika; Halvorsen, Kim Aleksander Tallaksen; Andersen, Per; Knutsen, Halvor; André, Carl (Journal article; Peer reviewed, 2018)
      The genetic impact of farmed fish escaping aquaculture is a highly debated issue. However, non-target species, such as cleaner fish used to remove sea lice from farmed fish, are rarely considered. Here, we report that wild ...

    • Genetic study reveals local differentiation persisting in the face of high connectivity and a genomic inversion likely linked with sexual antagonism in a common marine fish 

      Jansson, Eeva; André, Carl; Quintela, Maria; Halvorsen, Kim Aleksander Tallaksen; Besnier, Francois; Ayllon, Fernando; Faust, Ellika; Knutsen, Halvor; Strand, Åsa; Glover, Kevin Alan (Peer reviewed; Journal article, 2023)
      Sustainable harvest of wild populations requires knowledge of the underlying population structure. The focus of this study is on goldsinny wrasse (Ctenolabrus rupestris), a small marine fish inhabiting coastal waters of ...

    • Global, regional, and cryptic population structure in a high gene-flow transatlantic fish 

      Jansson, Eeva; Faust, Ellika; Bekkevold, Dorte; Quintela, Maria; Durif, Caroline; Halvorsen, Kim Aleksander Tallaksen; Dahle, Geir; Pampoulie, Christophe; Kennedy, James; Whittaker, Benjamin; Unneland, Laila; Post, Søren; André, Carl; Glover, Kevin Alan (Peer reviewed; Journal article, 2023)
      Lumpfish (Cyclopterus lumpus) is a transatlantic marine fish displaying large population sizes and a high potential for dispersal and gene-flow. These features are expected to result in weak population structure. Here, we ...

    • Goldsinny wrasse (Ctenolabrus rupestris) have a sex-dependent magnetic compass for maintaining site fidelity 

      Cresci, Alessandro; Larsen, Torkel; Halvorsen, Kim Aleksander Tallaksen; Durif, Caroline; Bjelland, Reidun Marie; Browman, Howard; Skiftesvik, Anne Berit (Peer reviewed; Journal article, 2021)
      The goldsinny wrasse (Ctenolabrus rupestris) is a commercially important fish that inhabits coastal areas across the eastern Atlantic. This species moves from a shallow home territory along the coast into deeper waters in ...

    • Harvesting changes mating behaviour in European lobster 

      Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Harrison, Hugo B.; Ellis, Charlie D.; Vøllestad, Leif Asbjørn; Knutsen, Halvor; Moland, Even; Olsen, Esben Moland (Journal article; Peer reviewed, 2018)
      Removing individuals from a wild population can affect the availability of prospective mates and the outcome of competitive interactions, with subsequent effects on mating patterns and sexual selection. Consequently, the ...

    • 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 ...

    • Kunnskapsbasert innovasjon for optimal ressursutnyttelse i leppefiskeriet — Sluttrapport i prosjekt 272202 - Regionalt forskningsfond Agder 

      Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Larsen, Torkel; Rafoss, Trond; Skiftesvik, Anne Berit (Rapport fra havforskningen;2020 - 3, Research report, 2020)
      Rensefisk benyttes for å kontrollere mengden lakselus i oppdrett av laksefisk i sjø i Norge. Behovet for rensefisk har økt markant siden 2010 på grunn av resistensutvikling mot medikamentelle behandlinger hos lakselus ...

    • Kunnskapsinnhenting Leppefisk – biologi og fiskeri 2013-2018: Rapport til Fiskeridirektoratet for 2018 sesongen 

      Skiftesvik, Anne Berit; Halvorsen, Kim Aleksander Tallaksen; Larsen, Torkel (Rapport fra havforskningen;2019 - 18, Research report, 2019)

    • Kunnskapsstøtte og råd for regulering av fisket etter leppefisk i 2022 

      Halvorsen, Kim Aleksander Tallaksen; Skiftesvik, Anne Berit; Larsen, Torkel; Otterå, Håkon Magne; Fernández-Chacón, Albert (Rapport fra havforskningen;2021 - 54, Research report, 2021)
      Havforskningsinstituttets råd om reguleringer av leppefisk har bygget på føre-var-prinsippet. Det er en målsetning å minimere risikoen for at fiskeriet fører til betydelige endringer i arts, størrelse- og kjønnssammensetning ...

    • Kunnskapsstøtte og råd for regulering av fisket etter leppefisk i 2024 

      Halvorsen, Kim Aleksander Tallaksen; Jørgensen, Terje; Ruud, Marthe Marie; Skiftesvik, Anne Berit (Rapport fra havforskningen;2023 - 59, Research report, 2023)
      Havforskningsinstituttet anbefaler at hovedtrekkene i 2023- reguleringen av fisket etter leppefisk videreføres for 2024 – men tilrår at det presiseres at bestemmelsen i §37, 4. ledd i Forskrift om drift av akvakulturanlegg ...

    • Kunnskapstøtte og råd for regulering av fisket etter leppefisk i 2021 

      Halvorsen, Kim Aleksander Tallaksen; Skiftesvik, Anne Berit; Bjelland, Reidun Marie; Larsen, Torkel (Rapport fra havforskningen;2020 - 51, Research report, 2020)
      Fiskeridirektoratet har i en bestilling datert 07.09.2020 bedt Havforskningsinstituttet (HI) om kunnskapsstøtte for regulering av totaluttak, fartøykvoter, artsbegrensninger i fisket etter leppefisk. Det bes også om ny ...

    • Lobster reserves as a management tool in coastal waters: Two decades of experience in Norway 

      Knutsen, Jan Atle; Kleiven, Alf Ring; Olsen, Esben Moland; Knutsen, Halvor; Espeland, Sigurd Heiberg; Sørdalen, Tonje Knutsen; Thorbjørnsen, Susanna Huneide; Hutchings, Jeffrey; Chacon, Albert Fernandez; Huserbråten, Mats Brockstedt Olsen; Villegas-Ríos, David; Halvorsen, Kim Aleksander Tallaksen; Kleiven, Portia Joy Nillos; Langeland, Thomas Kiland; Moland, Even (Peer reviewed; Journal article, 2022)
      The positive effects of reduced fishing pressure in marine protected areas (MPAs) are now well documented globally. Yet, evidence of MPA benefits from long-term replicated before-after control-impact (BACI) studies and ...

    • Marine protected areas rescue a sexually selected trait in European lobster 

      Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Vøllestad, Leif Asbjørn; Moland, Even; Olsen, Esben Moland (Peer reviewed; Journal article, 2020)
      Marine protected areas (MPAs) are increasingly implemented worldwide to maintain and restore depleted populations. However, despite our knowledge on the myriad of positive responses to protection, there are few empirical ...

    • Marine protected areas rescue a sexually selected trait in European lobster 

      Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Vøllestad, Leif Asbjørn; Moland, Even; Olsen, Esben Moland (Peer reviewed; Journal article, 2020)
      Marine protected areas (MPAs) are increasingly implemented worldwide to maintain and restore depleted populations. However, despite our knowledge on the myriad of positive responses to protection, there are few empirical ...

    • Mind the depth: The vertical dimension of a small-scale coastal fishery shapes selection on species, size, and sex in wrasses 

      Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Larsen, Torkel; Browman, Howard; Rafoss, Trond; Albretsen, Jon; Skiftesvik, Anne Berit (Peer reviewed; Journal article, 2020)
      Small‐scale fisheries (SSFs) tend to target shallow waters, but the depth distributions of coastal fish can vary depending on species, size, and sex. This creates a scope for a form of fishing selectivity that has received ...