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Havforskningsinstituttet HI Åpne/Lukke hovedmeny
English <- Tilbake

Alf Ring Kleiven

alf ring kleiven
Forsker
Telefon: 93871639
Avdeling: Fiskeridynamikk
Arbeidsområde

Arbeidsområde

Forsker

Marine Bevaringsområder / Marine Protected Areas

Fritidsfiske / Recreational Fishing

Spøkelsesfiske / Ghost Fishing

Hummer, Torsk, Sjøkreps / Lobster, Cod, Crayfish

Curriculum Vitae
Publikasjoner

Publikasjoner

Vitenskapelige artikler (NVI)

2024

Divergent responses of pelagic and benthic fish body-size structure to remoteness and protection from humans

Tom B. Letessier, David Mouillot, Laura Mannocci, Hanna Jabour Christ, Elamin Mohammed Elamin, Sheikheldin Mohamed Elamin, Alan M. Friedlander, Alex Hearn, Jean-Baptiste Juhel, Alf Ring Kleiven, Even Moland, Nicolas Mouquet, Portia Joy Nillos Kleiven, Enric Sala, Christopher D.H. Thompson, Laure Velez, Laurent Vigliola, Jessica J. Meeuwig
Science 383 p. 976-982
2023

Hazard and catch composition of ghost fishing gear revealed by a citizen science clean-up initiative

Susanna Huneide Thorbjørnsen, Ann-Elin Synnes, Ingrid Disch Løset, Alf Ring Kleiven
Marine Policy 148 p. 1-9
2023

Other Effective Area-based Conservation Measures – OECMs: Andre effektive arealbaserte bevaringstiltak

Alf Håkon Hoel, Gunnstein Bakke, Runa Gudmundsdottir Jonassen, Alf Ring Kleiven, Svein Løkkeborg, Kjell Harald Nedreaas, Gro Ingleid van der Meeren
Rapport fra Havforskningen
2022

Integrating complementary survey methods to estimate catches in Norway's complex marine recreational hook-and-line fishery

Keno Ferter, Håkon Magne Otterå, Mary C. Christman, Alf Ring Kleiven, Marc Simon Weltersbach, Sofie Gundersen, Christine Djønne, Otte Bjelland, Bruce Hartill, Jeremy Lyle, Kieran Hyder, Trude Kristin Borch, Jon Helge Vølstad
ICES Journal of Marine Science 80 p. 107-121
2022

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

Alf Ring Kleiven, Sigurd Heiberg Espeland, Stian Stiansen, Kotaro Ono, Fabian Zimmermann, Esben Moland Olsen
Scientific Reports 12
2022

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

Marte Sodeland, Sissel Jentoft, Per Erik Jorde, Morten Mattingsdal, Jon Albretsen, Alf Ring Kleiven, Ann-Elin Synnes, Sigurd Heiberg Espeland, Esben Moland Olsen, Carl André, Nils Christian Stenseth, Halvor Knutsen
Proceedings of the National Academy of Sciences of the United States of America 119
2022

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

Jan Atle Knutsen, Alf Ring Kleiven, Esben Moland Olsen, Halvor Knutsen, Sigurd Heiberg Espeland, Tonje Knutsen Sørdalen, Susanna Huneide Thorbjørnsen, Jeffrey Hutchings, Albert Fernandez Chacon, Mats Brockstedt Olsen Huserbråten, David Villegas-Ríos, Kim Aleksander Tallaksen Halvorsen, Portia Joy Nillos Kleiven, Thomas Kiland Langeland, Even Moland
Marine Policy 136
2022

Inclusion of recreational fishing in data-limited stocks: a case study on Norway lobster (Nephrops norvegicus) in Norway

Fabian Zimmermann, Alf Ring Kleiven, Merete Vik Ottesen, Guldborg Søvik
Canadian Journal of Fisheries and Aquatic Sciences 79 p. 969-978
2022

Integrating complementary survey methods to estimate catches in Norway’s complex marine recreational hook-and-line fishery

Keno Ferter, Håkon Magne Otterå, Mary C. Christman, Alf Ring Kleiven, Marc Simon Weltersbach, Sofie Gundersen, Christine Djønne, Otte Bjelland, Bruce Hartill, Jeremy Lyle, Kieran Hyder, Trude Kristin Borch, Jon Helge Vølstad
ICES Journal of Marine Science
2021

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

Even Moland, Albert Fernández-Chacón, Tonje Knutsen Sørdalen, David Villegas-Rios, Susanna Huneide Thorbjørnsen, Kim Aleksander Tallaksen Halvorsen, Mats Brockstedt Olsen Huserbråten, Esben Moland Olsen, Portia Joy Nillos Kleiven, Alf Ring Kleiven, Halvor Knutsen, Sigurd Heiberg Espeland, Carla Freitas, Jan Atle Knutsen
Frontiers in Marine Science
2021

Temperate fish detection and classification: a deep learning based approach

Kristian Muri Knausgård, Arne Wiklund, Tonje Knutsen Sørdalen, Kim Tallaksen Halvorsen, Alf Ring Kleiven, Jiao Lei, Morten Goodwin
Applied intelligence (Boston) p. 1-14
2019

No fear of bankruptcy: the innate self-subsidizing forces in recreational fishing

Alf Ring Kleiven, Even Moland, Ussif Rashid Sumaila
ICES Journal of Marine Science
2019

Field surveying of marine recreational fisheries in Norway using a novel spatial sampling frame reveals striking under-coverage of alternative sampling frames

Jon Helge Vølstad, Mary C. Christman, Keno Ferter, Alf Ring Kleiven, Håkon Magne Otterå, Øystein Aas, Robert Arlinghaus, Trude Borch, Jonathan Edward Colman, Bruce Hartill, Thrond Oddvar Haugen, Kieran Hyder, Jeremy Lyle, Martin Junker Ohldieck, Christian Skov, Harry Vincent Strehlow, Dave van Voorhees, Marc Simon Weltersbach, Edward D. Weber
ICES Journal of Marine Science 77 p. 2192-2205
2019

Biometric fish classification of temperate species using convolutional neural network with squeeze-and-excitation

Erlend Olsvik, Christian M.D. Trinh, Kristian Muri Knausgård, Arne Wiklund, Tonje Knutsen Sørdalen, Alf Ring Kleiven, Jiao Lei, Morten Goodwin
Lecture Notes in Computer Science (LNCS) 11606 LNAI p. 89-101
2019

Fishing pressure impacts the abundance gradient of European lobsters across the borders of a newly established marine protected area

Portia Joy Nillos Kleiven, Sigurd Heiberg Espeland, Esben Moland Olsen, Rene A. Abesamis, Even Moland, Alf Ring Kleiven
Proceedings of the Royal Society of London. Biological Sciences 286
2018

Who is fishing on what stock: Population-of-origin of individual cod (Gadus morhua) in commercial and recreational fisheries

Per Erik Jorde, Alf Ring Kleiven, Marte Sodeland, Esben Moland Olsen, Keno Ferter, Sissel Jentoft, Halvor Knutsen
ICES Journal of Marine Science 75 p. 2153-2162
2018

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

Hyder Kieran, Marc Simon Weltersbach, Mark Armstrong, Keno Ferter, Bryony Townhill, Anssi Ahvonen, Robert Arlinghaus, Andrei Baikov, Manuel Bellanger, Janis Birzaks, Trude Kristin Borch, Giulia Cambie, Martin de Graaf, Hugo M C Diogo, Lukasz Dziemian, Ana Gordoa, Ryszard Grzebielec, Bruce Hartill, Anders Kagervall, Kostas Kapiris, Martin Karlsson, Alf Ring Kleiven, Adam M Lejk, Harold Levrel, Sabrina Lovell, Jeremy Lyle, Pentti Miolanen, Graham Monkman, Beatriz Morales-Nin, Estanis Mugerza, Roi Martinez, Paul F O'Reilly, Hans Jakob Olesen, Anastasios Papadopoulos, Pablo Pita, Zachary Radford, Krzysztof Radtke, William Roche, Delphine Rocklin, Jon Ruiz, Callum Scougal, Roberto Silvestri, Christian Skov, Scott Steinback, Andreas Sundeløf, Arvydas Svagzdys, David Turnbull, Tessa van der Hammen, David van Voorhees, Frankwin van Winsen, Thomas J Verleye, Pedro Veiga, Jon Helge Vølstad, Lucia Zarauz, Tomas Zolubas, Harry Vincent Strehlow
Fish and Fisheries 19 p. 225-243
2016

Harvest pressure on coastal atlantic cod (Gadus morhua) from recreational fishing relative to commercial fishing assessed from tag-recovery data

Alf Ring Kleiven, Albert Fernandez Chacon, Jan-Harald Nordahl, Even Moland, Sigurd Heiberg Espeland, Halvor Knutsen, Esben Moland Olsen
PLOS ONE 11
2016

Causes of mortality in depleted populations of Atlantic cod estimated from multi-event modelling of mark-recapture and recovery data

Albert Fernandez Chacon, Even Moland, Sigurd Heiberg Espeland, Alf Ring Kleiven, Esben Moland Olsen
Canadian Journal of Fisheries and Aquatic Sciences 74 p. 116-126
2014

Governance challenges in scaling up from individual MPAs to MPA networks

Jean-Luc Solandt, Peter Jones, Dominique Duval-Diop, Alf Ring Kleiven, Katia Frangoudes
Aquatic conservation 24 p. 145-152
2014

Governance challenges in scaling up from individual MPAs to MPA networks

Jean-Luc Solandt, Peter Jones, Dominique Duval-Diop, Alf Ring Kleiven, Katia Frangoudes
Aquatic conservation 24 p. 145-152
2014

Catch-and-release of Atlantic cod (Gadus morhua): post-release behaviour of acoustically pretagged fish in a natural marine environment

Keno Ferter, Hartmann Klaas, Alf Ring Kleiven, Even Moland, Esben Moland Olsen
Canadian Journal of Fisheries and Aquatic Sciences 72 p. 252-261
2013

Communication between scientists, fishery managers and recreational fishers: lessons learned from a comparative analysis of international case studies

Michel Dedual, Oscar Sague Pla, Robert Arlinghaus, Adrian Clarke, Keno Ferter, Peter Geertz Hansen, Daniel Gerdeaux, Fern Hames, Steve Kenelly, Alf Ring Kleiven, Andreas Meraner, Bernd Ueberschaer
Fisheries Management and Ecology 20 p. 234-246
2013

Lobster and cod benefit from small-scale northern marine protected areas: inference from an empirical before - after control-impact study

Even Moland, Esben Moland Olsen, Halvor Knutsen, Pauline Garrigou, Sigurd Heiberg Espeland, Alf Ring Kleiven, Carl Andre, Jan Atle Knutsen
Proceedings of the Royal Society of London. Biological Sciences 280
2012

The role of MPAs in reconciling fisheries management with conservation of biological diversity

Jake C. Rice, Erlend Moksness, Colin G. Attwood, Stephen K Brown, Geir Dahle, Kristina M. Gjerde, Ellen Sofie Grefsrud, Richard Kenchington, Alf Ring Kleiven, Patrick McConney, Magnus A K Ngoile, Tor Næsje, Erik Joel Steinar Olsen, Esben Moland Olsen, Jessica Sanders, Chandrika Sharma, Ole Vestergaard, Lena Westlund
Ocean and Coastal Management 69 p. 217-230
2012

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

Alf Ring Kleiven, Esben Moland Olsen, Jon Helge Vølstad
PLOS ONE 7
2011

Estimating Recreational and Commercial Fishing Effort for European Lobster Homarus gammarus by Strip Transect Sampling

Alf Ring Kleiven, Esben Moland Olsen, Jon Helge Vølstad
Marine and Coastal Fisheries 3 p. 383-393
2011

Place-based management at different spatial scales

Erik Joel Steinar Olsen, Alf Ring Kleiven, Hein Rune Skjoldal, Cecilie von Quillfeldt
Journal of Coastal Conservation 15 p. 257-269

Annet tidsskriftbidrag

2013

Verdens verste hummerforvaltning?

Alf Ring Kleiven, Even Moland
Dagbladet

Faglige foredrag

2024

Estimating Unreported Recreational Landings of Lobster and Stock Assessment Impacts

Johanna Bjånes Marcussen, Fabian Zimmermann, Alf Ring Kleiven
2019

The increasing recreational trap fishery for Norway lobster (Nephrops norvegicus) along the southwestern coast of Norway – insights from a baseline study

Fabian Zimmermann, Alf Ring Kleiven, Guldborg Søvik
2018

Marine Recreational Fishery in Norway: A framework for science-based management of recreational fisheries in Norway

Jon Helge Vølstad, Keno Ferter, Alf Ring Kleiven
2016

Developing a sampling scheme to evaluate Norwegian marine recreational fisheries - A case study from the Oslofjord

Keno Ferter, Alf Ring Kleiven, Jonathan Edward Colman, Thrond Oddvar Haugen, Stian Stensland, Harry Vincent Strehlow, Marc Simon Weltersbach, Jon Helge Vølstad
2014

Catch-and-release of Atlantic cod (Gadus morhua): post-release behaviour of acoustically pre-tagged fish in a natural marine environment

Keno Ferter, Klaas Hartmann, Alf Ring Kleiven, Even Moland, Esben Moland Olsen
2014

Den lange og kronglete historien om hummer i Norge

Gro Ingleid van der Meeren, Alf Ring Kleiven, Ann-Lisbeth Agnalt, Ellen Sofie Grefsrud, Even Moland, Espen Moland Olsen
2014

Den lange og kronglete historien om hummer i Norge

Gro Ingleid van der Meeren, Alf Ring Kleiven, Ann-Lisbeth Agnalt, Ellen Sofie Grefsrud, Even Moland, Espen Moland Olsen
2014

The Long and Winding story of the Lobster Homarus gammarus in Norway

Gro Ingleid van der Meeren, Alf Ring Kleiven, Ann-Lisbeth Agnalt, Ellen Sofie Grefsrud
2013

Long-term trauma? Studying the effects of catch-and-release on Atlantic cod behavior using acoustic telemetr

Keno Ferter, Alf Ring Kleiven, Klaas Hartmann, Even Moland, Esben Moland Olsen
2012

Lobster reserves in coastal Skagerrak: a field laboratory for science and management

Moland Even, Esben Moland Olsen, Halvor Knutsen, Alf Ring Kleiven, Carl Andre, Jan Atle Knutsen

Rapporter og avhandlinger

2024

Raet nasjonalpark — Kunnskap og råd for bevaring av marint naturmangfold

Alf Ring Kleiven, Susanna Huneide Thorbjørnsen, Gro Ingleid van der Meeren, Carla Freitas, Lars Johan Naustvoll, Even Moland, Kjell Magnus Norderhaug, Tone Falkenhaug, Molly Claire Reamon, Sine Hagestad, Norith Habberstad Eckbo
Rapport fra havforskningen
2024

Hvor godt fungerer marine bevaringsområder? En litteraturstudie

Alf Ring Kleiven, Helene Skjeie Thorstensen, Kjell Magnus Norderhaug, Gro Ingleid van der Meeren, Katherine Mary Dunlop, Susanna Huneide Thorbjørnsen, Albert Fernández-Chacón, Terje van der Meeren, Even Moland, Mette Skern-Mauritzen, Lis Lindal Jørgensen, Marthe Larsen Haarr
2024

The effect of small-scale partially protected areas on European lobster (Homarus gammarus) abundance and demographics – a citizen science-based study

Torgan Petter, Glenn John Dunshea, Anders Gravbrøt Finstad, Alf Ring Kleiven
2024

Raet nasjonalpark — Kunnskap og råd for bevaring av marint naturmangfold

Alf Ring Kleiven, Susanna Huneide Thorbjørnsen, Gro Ingleid van der Meeren, Carla Freitas, Lars Johan Naustvoll, Even Moland, Kjell Magnus Norderhaug, Tone Falkenhaug, Molly Claire Reamon, Stine Hagestad, Norith Habberstad Eckbo
Rapport fra havforskningen
2024

Ny målemetode for hummar

Alf Ring Kleiven, Johanna Bjånes Marcussen, Tonje Knutsen Sørdalen, Terje van der Meeren, Ann-Lisbeth Agnalt, Gro Ingleid van der Meeren
Rapport fra havforskningen
2024

Pilotprosjekt for vurdering av samlet påvirkning i Oslofjorden – ytre del

Johanna Myrseth Aarflot, Lars Johan Naustvoll, Frithjof Emil Moy, Kjell Magnus Norderhaug, Florian Berg, Cecilie Kvamme, Guldborg Søvik, Alf Ring Kleiven, Jon Albretsen, Carla Freitas, Susanna Huneide Thorbjørnsen, Tone Falkenhaug
Rapport fra havforskningen
2023

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

Alf Håkon Hoel, Gunnstein Bakke, Runa Gudmundsdottir Jonassen, Alf Ring Kleiven, Svein Løkkeborg, Gro Ingleid van der Meeren, Kjell Harald Nedreaas
Rapport fra havforskningen
2023

Richness, abundance, and spatial distribution of coastal fish around Hitra and Frøya

Astrid Winnberg Skoge, Torkild Bakken, Alf Ring Kleiven, Carla Freitas
2023

Tiltak mot spøkelsesfiske i marine nasjonalparker - Arbeidsrapport

Susanna Huneide Thorbjørnsen, Alf Ring Kleiven, Tord Aslaksen, Terje Jørgensen, Kristine Valen Kerlefsen, Sunniva Rosfjord Loga, Sunniva Sandbu Numme
2022

Strandkrabber Carcinus maenas og strandkrabbefiskeri

Gro Ingleid van der Meeren, Fabian Zimmermann, Anne Christine Utne-Palm, Martin Wiech, Kim Aleksander Tallaksen Halvorsen, Alf Ring Kleiven, Portia Joy Nillos Kleiven, Terje Jørgensen, Johanna Bjånes Marcussen
2021

Fritidsfiskevaner i saltvann blant bosatte i Norge. En oversikt over fiskeatferd, motiver og holdninger til fangstreguleringer

Sofie Kjendlie Selvaag, Øystein Aas, Trude Kristin Borch, Alf Ring Kleiven, Stian Stensland
2021

Aktiv forvaltning av marine ressurser - Frøya og Hitra - Sluttrapport

Alf Ring Kleiven, Sigurd Heiberg Espeland, Guldborg Søvik, Jon Albretsen, Portia Joy Nillos Kleiven, Fabian Zimmermann, Ellen Sofie Grefsrud, Kim Aleksander Tallaksen Halvorsen, Ola Vie
2021

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

Lis Lindal Jørgensen, Even Moland, Vivian Husa, Tina Kutti, Alf Ring Kleiven, Gro Ingleid van der Meeren
2021

Tiltak mot spøkelsesfiske i Raet nasjonalpark - Arbeidsrapport

Alf Ring Kleiven, Susanna Huneide Thorbjørnsen, Tord Aslaksen
2019

Comparing Baited Remote Underwater Video Systems with Fish Traps Along the Coast of Frøya and Hitra

Marit Bull, Alf Ring Kleiven, Jussi Evertsen, Torkild Bakken
2019

Hummerfisket 2017 og 2018: Innsats og fangst

Alf Ring Kleiven, Jeremy Lyle, Keno Ferter, Sigurd Heiberg Espeland, Portia Joy Nillos Kleiven, Lene Christensen, Jon Helge Vølstad
2019

Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning: LINDESNES - Effekter på hummer i Klippeskjær bevaringsområde

Sigurd Heiberg Espeland, Alf Ring Kleiven, Hanne Sannæs, Portia Joy Nillos Kleiven
2019

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

Alf Ring Kleiven, Sigurd Heiberg Espeland, Jon Albretsen, Kim Aleksander Tallaksen Halvorsen, Guldborg Søvik, Ellen Sofie Grefsrud, Dag Ottesen
2017

Individual reports from the Helsinki, Arendal and Jønkøping workshops

Alf Ring Kleiven, Melin Daniel, Valta Otso
2017

Evaluering av effekten av forvaltningstiltak på hummer og forslag til tiltak

Alf Ring Kleiven, Even Moland, Tonje Knutsen Sørdalen, Sigurd Heiberg Espeland, Gro Ingleid van der Meeren
2016

Oppdatert kunnskapsstatus om kystnær torsk i Sør Norge

Asgeir Aglen, Kjell Harald Nedreaas, Even Moland, Halvor Knutsen, Alf Ring Kleiven, Tore Johannessen, Henning Wehde, Terje Jørgensen, Sigurd Heiberg Espeland, Esben Moland Olsen, Jan Atle Knutsen
2015

Marine naturforhold og naturverdier i Færder nasjonalpark

Einar Dahl, Jan Atle Knutsen, Jon Albretsen, Mats Brockstedt Olsen Huserbråten, Sigurd Espeland Heiberg, Halvor Knutsen, Anders Jelmert, Alf Ring Kleiven, Even Moland, Frithjof Emil Moy, Lars Johan Naustvoll, Espen Moland Olsen, Susanna Huneide Thorbjørnsen
2010

The Management of Lobster in Coastal Skagerrak: Recreational Fisheries, Unreported Commercial Catches and Marine Protected Areas

Kleiven, Alf Ring
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