Blar i Brage IMR 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;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 ... -
Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning
Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Moland, Even; Knutsen, Jan Atle (Rapport fra Havforskningen;Nr. 34-2014, Working paper, 2014-12) -
Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning. Årsrapport 2013
Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Bodvin, Torjan (Rapport fra Havforskningen;Nr. 35-2013, Working paper, 2013-12) -
Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning. Årsrapport 2015
Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Moland, Even; Knutsen, Jan Atle (Rapport fra Havforskningen;21-2015, Working paper, 2015) -
Aktiv forvaltning av marine ressurser – lokalt tilpasset forvaltning: LINDESNES - Effekter på hummer i Klippeskjær bevaringsområde
Espeland, Sigurd Heiberg; Kleiven, Alf Ring; Sannæs, Hanne; Kleiven, Portia Joy Nillos (Rapport fra havforskningen;2019 - 12, Research report, 2019)Havforskningsinstituttet har siden 2011 gjennomført prøvefiske etter hummer i Klippeskjær bevaringsområde for å undersøke effekter av hummerfredningen som ble innført i 2013. I perioden frem til 2015 har fangsten av hummer ... -
Aktiv forvaltning av marine verdier i kystsonen
Bodvin, Torjan; Olsen, Torstein; Espeland, Sigurd Heiberg; Kleiven, Alf Ring (Research report, 2010-12) -
Aktiv forvaltning av marine verdier i kystsonen
Bodvin, Torjan; Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Steen, Henning; Moy, Frithjof E. (Årsrapport;2012, Research report, 2012-12-14)The report gives an overview of activities, methods and preliminary results for the two municipalities involved, Tvedestrand and Lindesnes. The Ministry for Fisheries and Coastal affairs proclaimed 20.06.2012 the establishment ... -
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 (Peer reviewed; Journal article, 2019) -
Catch-and-release of Atlantic cod (Gadus morhua): post-release behaviour of acoustically pretagged fish in a natural marine environment
Ferter, Keno; Hartmann, Klaas; Kleiven, Alf Ring; Moland, Even; Olsen, Esben Moland (Journal article; Peer reviewed, 2014-10-07)Studying the sublethal effects of catch-and-release (C&R) is challenging, as there are several potential sources of bias. For example, if behavioural alterations immediately after the release event are to be studied, ... -
Divergent responses of pelagic and benthic fish body-size structure to remoteness and protection from humans
Letessier, Tom B.; Mouillot, David; Mannocci, Laura; Christ, Hanna Jabour; Elamin, Elamin Mohammed; Elamin, Sheikheldin Mohamed; Friedlander, Alan M.; Hearn, Alex; Juhel, Jean-Baptiste; Kleiven, Alf Ring; Moland, Even; Mouquet, Nicolas; Kleiven, Portia Joy Nillos; Sala, Enric; Thompson, Christopher D.H.; Velez, Laure; Vigliola, Laurent; Meeuwig, Jessica J. (Peer reviewed; Journal article, 2024)Animal body-size variation influences multiple processes in marine ecosystems, but habitat heterogeneity has prevented a comprehensive assessment of size across pelagic (midwater) and benthic (seabed) systems along anthropic ... -
Evaluering av effekten av forvaltningstiltak på hummer og forslag til tiltak
Kleiven, Alf Ring; Moland, Even; Sørdalen, Tonje Knutsen; Espeland, Sigurd Heiberg; van der Meeren, Gro Ingleid (Rapport fra havforskningen;Nr. 15 - 2017, Research report, 2017) -
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 (Journal article; Peer reviewed, 2019)Marine protected areas (MPAs) are considered viable fisheries management tools due to their potential benefits of adult spillover and recruitment subsidy to nearby fisheries. However, before–after control–impact studies ... -
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, 2016-03-09)Marine recreational fishing is a popular outdoor activity. However, knowledge about the magnitude of recreational catches relative to commercial catches in coastal fisheries is generally sparse. Coastal Atlantic cod (Gadus ... -
Havets skumleste
Bergstad, Odd-Aksel; Albert, Ole Thomas; Jelmert, Anders; Bjelland, Otte; Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Moland, Even (Others, 2015-06) -
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, 2023) -
Hummerfisket 2017 og 2018: Innsats og fangst
Kleiven, Alf Ring; Lyle, Jeremy; Ferter, Keno; Espeland, Sigurd Heiberg; Kleiven, Portia Joy Nillos; Christensen, Lene; Vølstad, Jon Helge (Rapport fra havforskningen;2019 - 39, Research report, 2019)I 2017 ble det innført obligatorisk påmelding til hummerfisket for både fritidsfiskere og yrkesfiskere. Dette har lagt grunnlaget for muligheten til å beregne total innsats og fangst av hummer i Norge. Etter hummersesongen ... -
Inclusion of recreational fishing in data-limited stocks: a case study on Norway lobster (Nephrops norvegicus) in Norway
Zimmermann, Fabian; Kleiven, Alf Ring; Vik Ottesen, Merete; Søvik, Guldborg (Others, 2022)Recreational and semi-subsistence fisheries are challenging to monitor but can act as precursors of developments in commercial fisheries, contributing information in data-limited situations. We compared trends in commercial ... -
Integrating complementary survey methods to estimate catches in Norway’s complex marine recreational hook-and-line fishery
Ferter, Keno; Otterå, Håkon Magne; Christman, Mary C.; Kleiven, Alf Ring; Weltersbach, Marc Simon; Gundersen, Sofie; Djønne, Christine; Bjelland, Otte; Hartill, Bruce; Lyle, Jeremy; Hyder, Kieran; Borch, Trude Kristin; Vølstad, Jon Helge (Peer reviewed; Journal article, 2022)Marine recreational fishing is popular in Norway, but current estimates of the catches by resident and tourist anglers are lacking due to several challenges, in particular Norway’s long and intricate coastline with no ... -
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 ...