Blar i Brage IMR på forfatter "Kleiven, Alf Ring"

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    • Marint vern - Havforskningsinstituttets ekspertvurdering av utfordringer og status for arbeid med marint vern i Norge 

      Jørgensen, Lis Lindal; Moland, Even; Husa, Vivian; Kutti, Tina; Kleiven, Alf Ring; van der Meeren, Gro Ingleid (Rapport fra havforskningen;2021 - 9, Research report, 2021)
      Havforskningsinstituttet har satt sammen en ekspertgruppe for å levere en kort oversikt over instituttets utredninger og overvåking av faktiske og potensielle eksempler på marint vern. I denne rapporten tar vi utgangspunkt ...

    • Oppdatert kunnskapsstatus om kystnær torsk i Sør Norge 

      Aglen, Asgeir; Nedreaas, Kjell; Moland, Even; Knutsen, Halvor; Kleiven, Alf Ring; Johannessen, Tore; Wehde, Henning; Jørgensen, Terje; Espeland, Sigurd Heiberg; Olsen, Esben Moland; Knutsen, Jan Atle (Fisken og Havet;4-2016, Research report, 2016-05)
      English: In a report from 2008 an assessment of coastal cod in southern Norway, from the Swedish border to Stad, was presented, together with suggestions to management initiatives. This report shortly summarize the ...

    • Other Effective Area-based Conservation Measures – OECMs: Andre effektive arealbaserte bevaringstiltak - Gjennomgang av noen norske arealbaserte fiskeriforvaltningstiltak og deres bidrag til bevaring av marin natur 

      Hoel, Alf Håkon; Bakke, Gunnstein; Jonassen, Runa Gudmundsdottir; Kleiven, Alf Ring; Løkkeborg, Svein; van der Meeren, Gro Ingleid; Nedreaas, Kjell Harald (Rapport fra havforskningen;2023 - 45, Research report, 2023)
      I 2010 vedtok partsmøtet under konvensjonen om biologisk mangfold (CBD) bevaringsmål for natur der det blant annet het at 10% av hav- og kystområder skulle bevares innen 2020. Dette målet skulle kunne nås ad to veier: ...

    • Recreational sea fishing in Europe in a global context—Participation rates, fishing effort, expenditure, and implications for monitoring and assessment 

      Kieran, Hyder; Weltersbach, Marc Simon; Armstrong, Mark; Ferter, Keno; Townhill, Bryony; Ahvonen, Anssi; Arlinghaus, Robert; Baikov, Andrei; Bellanger, Manuel; Birzaks, Janis; Borch, Trude Kristin; Cambie, Giulia; de Graaf, Martin; Diogo, Hugo M C; Dziemian, Lukasz; Gordoa, Ana; Grzebielec, Ryszard; Hartill, Bruce; Kagervall, Anders; Kapiris, Kostas; Karlsson, Martin; Kleiven, Alf Ring; Lejk, Adam M; Levrel, Harold; Lovell, Sabrina; Lyle, Jeremy; Miolanen, Pentti; Monkman, Graham; Morales-Nin, Beatriz; Mugerza, Estanis; Martinez, Roi; O'Reilly, Paul F; Olesen, Hans Jakob; Papadopoulos, Anastasios; Pita, Pablo; Radford, Zachary; Radtke, Krzysztof; Roche, William; Rocklin, Delphine; Ruiz, Jon; Scougal, Callum; Silvestri, Roberto; Skov, Christian; Steinback, Scott; Sundeløf, Andreas; Svagzdys, Arvydas; Turnbull, David; van der Hammen, Tessa; van Voorhees, David; van Winsen, Frankwin; Verleye, Thomas J; Veiga, Pedro; Vølstad, Jon Helge; Zarauz, Lucia; Zolubas, Tomas; Strehlow, Harry Vincent (Journal article; Peer reviewed, 2017)
      Marine recreational fishing (MRF) is a high-participation activity with large economic value and social benefits globally, and it impacts on some fish stocks. Although reporting MRF catches is a European Union legislative ...

    • Restoration of Abundance and Dynamics of Coastal Fish and Lobster Within Northern Marine Protected Areas Across Two Decades 

      Moland, Even; Fernández-Chacón, Albert; Sørdalen, Tonje Knutsen; Villegas-Rios, David; Thorbjørnsen, Susanna Huneide; Halvorsen, Kim Aleksander Tallaksen; Huserbråten, Mats Brockstedt Olsen; Olsen, Esben Moland; Kleiven, Portia Joy Nillos; Kleiven, Alf Ring; Knutsen, Halvor; Espeland, Sigurd Heiberg; Freitas, Carla; Knutsen, Jan Atle (Peer reviewed; Journal article, 2021)
      This article reviews a suite of studies conducted in a network of coastal Marine Protected Areas (MPAs) in Skagerrak, Southeast Norway. In 2006, Norway’s first lobster reserves were implemented, with the aim of protecting ...

    • Stabilizing selection on Atlantic cod supergenes through a millennium of extensive exploitation 

      Sodeland, Marte; Jentoft, Sissel; Jorde, Per Erik; Mattingsdal, Morten; Albretsen, Jon; Kleiven, Alf Ring; Synnes, Ann-Elin; Espeland, Sigurd Heiberg; Olsen, Esben Moland; André, Carl; Stenseth, Nils Christian; Knutsen, Halvor (Peer reviewed; Journal article, 2022)
      Life on Earth has been characterized by recurring cycles of ecological stasis and disruption, relating biological eras to geological and climatic transitions through the history of our planet. Due to the increasing degree ...

    • Stabilizing selection on Atlantic cod supergenes through a millennium of extensive exploitation 

      Sodeland, Marte; Jentoft, Sissel; Jorde, Per Erik; Mattingsdal, Morten; Albretsen, Jon; Kleiven, Alf Ring; Synnes, Ann-Elin; Espeland, Sigurd Heiberg; Olsen, Esben Moland; André, Carl; Stenseth, Nils Christian; Knutsen, Halvor (Peer reviewed; Journal article, 2022)
      Life on Earth has been characterized by recurring cycles of ecological stasis and disruption, relating biological eras to geological and climatic transitions through the history of our planet. Due to the increasing degree ...

    • Strandkrabber Carcinus maenas og strandkrabbefiskeri 

      van der Meeren, Gro Ingleid; Zimmermann, Fabian; Utne-Palm, Anne Christine; Wiech, Martin; Halvorsen, Kim Aleksander Tallaksen; Kleiven, Alf Ring; Kleiven, Portia Joy Nillos; Jørgensen, Terje; Marcussen, Johanna Bjånes (Rapport fra havforskningen;2022 - 15, Research report, 2022)
      I Norge er strandkrabber, Carcinus maenas, kjent og for mange, kjær naturlig del av dyrelivet. De opptrer på grunne strender, blir ivrig fanget av barn, men er egentlig undervurdert som produkt. Dette er en art som kanskje ...

    • Technological creep masks continued decline in a lobster (Homarus gammarus) fishery over a century 

      Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Stiansen, Stian; Ono, Kotaro; Zimmermann, Fabian; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)
      Fishery-dependent data are frequently used to inform management decisions. However, inferences about stock development based on commercial data such as Catch-Per-Unit-Effort (CPUE) can be severely biased due to a phenomenon ...

    • Temperate fish detection and classification: a deep learning based approach 

      Knausgård, Kristian Muri; Wiklund, Arne; Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Kleiven, Alf Ring; Lei, Jiao; Goodwin, Morten (Peer reviewed; Journal article, 2021)
      A wide range of applications in marine ecology extensively uses underwater cameras. Still, to efficiently process the vast amount of data generated, we need to develop tools that can automatically detect and recognize ...

    • Tiltak mot spøkelsesfiske i marine nasjonalparker - Arbeidsrapport 

      Thorbjørnsen, Susanna Huneide; Kleiven, Alf Ring; Aslaksen, Tord; Jørgensen, Terje; Kerlefsen, Kristine Valen; Loga, Sunniva Rosfjord; Numme, Sunniva Sandbu (Rapport fra havforskningen;2023 - 26, Research report, 2023)
      Prosjektet «Tiltak mot spøkelsesfiske i marine nasjonalparker» (2021-2022) har fokusert på kartlegging og fjerning av tapte fiskeredskaper i de fire nasjonalparkene Raet, Jomfruland, Færder og Ytre Hvaler. Prosjektet er ...

    • Tiltak mot spøkelsesfiske i Raet nasjonalpark - Arbeidsrapport 

      Kleiven, Alf Ring; Thorbjørnsen, Susanna Huneide; Aslaksen, Tord (Rapport fra havforskningen;, Research report, 2021)
      Prosjektet «tiltak mot spøkelsesfiske i Raet nasjonalpark», finansiert av Handelens Miljøfond, ble startet opp på sensommeren 2019. Det ledes av Havforskningsinstituttet og Green Bay AS er samarbeidspartner. Prosjektet er ...

    • Total Catch of a Red-Listed Marine Species Is an Order of Magnitude Higher than Official Data 

      Kleiven, Alf Ring; Olsen, Esben Moland; Vølstad, Jon Helge (Journal article; Peer reviewed, 2012-02-17)
      Accurate information on total catch and effort is essential for successful fisheries management. Officially reported landings, however, may be underestimates of total catch in many fisheries. We investigated the fishery ...