Blar i AURA på forfatter "Kleiven, Alf Ring"
-
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;, Research report, 2019) -
Biometric Fish Classification of Temperate Species Using Convolutional Neural Network with Squeeze-and-Excitation
Olsvik, Erlend; Trinh, Christian M. D.; Knausgård, Kristian Muri; Wiklund, Arne; Sørdalen, Tonje Knutsen; Kleiven, Alf Ring; Lei, Jiao; Goodwin, Morten (Journal article; Peer reviewed, 2019) -
Catch-and-release of Atlantic cod (Gadus morhua): post-release behaviour of acoustically pretagged fish in a natural marine environment
Ferter, Keno; Klaas, Hartmann; Kleiven, Alf Ring; Moland, Even; Olsen, Esben Moland (Journal article, 2014) -
Fishing pressure impacts the abundance gradient of European lobsters across the borders of a newly established marine protected area
Kleiven, Portia Joy Nillos; Espeland, Sigurd Heiberg; Olsen, Esben Moland; Abesamis, Rene A.; Moland, Even; Kleiven, Alf Ring (Peer reviewed; Journal article, 2019) -
Ghost fishing in Raet National Park: estimating the impact on Atlantic cod and three species of wrasse
Numme, Sunniva Sandbu (Master thesis, 2022)Loss of fishing gear have been a problem for as long as fishing has occurred in the ocean. As modern fishing gear are made up of mostly synthetic materials, it will stay intact and continue to fish for a long time after ... -
Harvest pressure on coastal atlantic cod (Gadus morhua) from recreational fishing relative to commercial fishing assessed from tag-recovery data
Kleiven, Alf Ring; Chacon, Albert Fernandez; Nordahl, Jan-Harald; Moland, Even; Espeland, Sigurd Heiberg; Knutsen, Halvor; Olsen, Esben Moland (Journal article; Peer reviewed, 2016) -
Hazard and catch composition of ghost fishing gear revealed by a citizen science clean-up initiative
Thorbjørnsen, Susanna Huneide; Synnes, Ann-Elin; Løset, Ingrid Disch; Kleiven, Alf Ring (Peer reviewed; Journal article, 2022)Ghost fishing, the continued catch of fishes and invertebrates by lost fishing gear, represents an animal welfare issue as well as a waste of both potential food and ecosystem resources. Fishing gear is lost by both ... -
Impacts of ghost fishing on European lobster (Homarus gammarus) and brown crab (Cancer pagurus) in Raet national park, Norway
Loga, Sunniva Rosfjord (Master thesis, 2022)Lost fishing gear pose a threat to marine life in large parts of the world. Fishing gear have the potential to continue to fish for a long time after it has been lost, referred to as “ghost fishing”, an issue which has ... -
Lobster and cod benefit from small-scale northern marine protected areas : inference from an empirical before - after control-impact study
Moland, Even; Olsen, Esben Moland; Knutsen, Halvor; Garrigou, Pauline; Espeland, Sigurd Heiberg; Kleiven, Alf Ring; André, Carl; Knutsen, Jan Atle (Journal article; Peer reviewed, 2013)Marine protected areas (MPAs) are increasingly implemented as tools to conserve and manage fisheries and target species. Because there are opportunity costs to conservation, there is a need for science-based assessment of ... -
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, 2021)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 ... -
Pilotprosjekt for vurdering av samlet påvirkning i Oslofjorden – ytre del
Aarflot, Johanna Myrseth; Naustvoll, Lars Johan; Moy, Frithjof Emil; Norderhaug, Kjell Magnus; Berg, Florian; Kvamme, Cecilie; Søvik, Guldborg; Kleiven, Alf Ring; Albretsen, Jon; Freitas, Carla; Thorbjørnsen, Susanna Huneide; Falkenhaug, Tone (Rapport fra havforskningen; 2024-15, Research report, 2024)Stor befolkningstetthet, høy menneskelig aktivitet og miljøutfordringer gjør at det er viktig å vurdere menneskelig påvirkning i Oslofjorden samlet. Denne rapporten presenterer en tverrsektoriell fremstilling av samlet ... -
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) -
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 ... -
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 ... -
The life-saving effect of biodegradable cotton thread in lost fishing traps: from a cleanup-project in Raet National Park, Norway
Kerlefsen, Kristine Valen (Master thesis, 2022)The fishing gear used today is primarily made of synthetic materials, which gives the gear a long breakdown time. This means that Abandoned, Lost, and Discarded Fishing Gear (ALDFG) can continue fishing for a long time in ... -
Who is fishing on what stock: Population-of-origin of individual cod (Gadus morhua) in commercial and recreational fisheries
Jorde, Per Erik; Kleiven, Alf Ring; Sodeland, Marte; Olsen, Esben Moland; Ferter, Keno; Jentoft, Sissel; Knutsen, Halvor (Journal article; Peer reviewed, 2018)