Blar i Publikasjoner fra CRIStin på forfatter "Aglen, Asgeir"
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Abundance indices for norwegian coastal cod north of 62°N
Aglen, Asgeir; Fall, Johanna Jennifer Elisabeth; Gjøsæter, Harald; Staby, Arved (Rapport fra havforskningen;2021 - 6, Research report, 2021)In connection with the benchmark processes within ICES on Norwegian Coastal Cod north of 62°N during autumn 2020-spring 2021, new abundance index series based on bottom trawl stations and acoustics at the autumn coastal ... -
Analysis of coastal cod (Gadus morhua L.) sampled on spawning sites reveals a genetic gradient throughout Norway's coastline
Dahle, Geir; Quintela, María; Johansen, Torild; Westgaard, Jon-Ivar; Besnier, Francois; Aglen, Asgeir; Jørstad, Knut Eirik; Glover, Kevin (Journal article; Peer reviewed, 2018)Atlantic cod (Gadus morhua L.) has formed the basis of many economically significant fisheries in the North Atlantic, and is one of the best studied marine fishes, but a legacy of overexploitation has depleted populations ... -
Climate change and new potential spawning sites for Northeast Arctic cod
Sandø, Anne Britt; Johansen, Geir Odd; Aglen, Asgeir; Stiansen, Jan Erik; Renner, Angelika (Peer reviewed; Journal article, 2020)In this study we investigate both historical and potential future changes in the spatial distribution of spawning habitats for Northeast Arctic cod (NEA cod) based on a literature study on spawning habitats and different ... -
Coincident mass occurrence of gelatinous zooplankton in Northern Norway
Knutsen, Tor; Hosia, Aino; Falkenhaug, Tone; Skern-Mauritzen, Rasmus; Wiebe, Peter H.; Larsen, Roger B.; Aglen, Asgeir; Berg, Erik (Peer reviewed; Journal article, 2018)In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible ... -
Estimation of acoustic indices with CVs for cod and haddock in the Barents Sea winter survey 1994 – 2017 applying the Sea2Data StoX software.
Mehl, Sigbjørn; Aglen, Asgeir; Johnsen, Espen; Skålevik, Åsmund (Fisken og Havet;5-2018, Research report, 2018)Sea2Data programmet StoX er brukt til å estimere akustiske indekser med CV for nordøstarktisk torsk og hyse fra vintertoktet i Barentshavet i 1994 til 2017. Indeksene er sammenlignet med indekser tidligere estimert med ... -
Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software.
Mehl, Sigbjørn; Johnsen, Espen; Skålevik, Åsmund; Aglen, Asgeir (Fisken og Havet;1-2018, Research report, 2018)Sea2Data programmet StoX er brukt til å estimere akustiske indekser med CV og lengde og vekt ved alder for nordøstarktisk sei fra det norske kysttoktet Varanger – Stad i 2013 til 2017. Indeksene er sammenlignet med indekser ... -
Fish consumption by great cormorants in Norwegian coastal waters—a human-wildlife conflict for wrasses, but not gadids
Dehnhard, Nina; Langset, Magdalene; Aglen, Asgeir; Lorentsen, Svein-Håkon; Anker-Nilssen, Tycho (Peer reviewed; Journal article, 2021)Piscivorous wildlife is often perceived as competitors by humans. Great cormorants of the continental subspecies (Phalacrocorax carbo sinensis) in the Baltic and North Sea increase, while local cod (Gadus morhua) stocks ... -
Fish investigations in the Barents Sea winter 2017
Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Russkikh, Alexey A.; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert (IMR/PINRO Joint Report Series;, Research report, 2017)This report presents the main results from the surveys in January–March 2017. The surveys were performed with the Norwegian research vessels “Helmer Hanssen” and “G.O. Sars”. Annual survey reports since 1981 are listed in ... -
Fish investigations in the Barents Sea winter 2018.
Mehl, Sigbjørn; Aglen, Asgeir; Gjøsæter, Harald; Godiksen, Jane Aanestad; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Russkikh, Alexey A.; Tretyakov, Ivan (IMR/PINRO Joint Report Series;, Research report, 2018)This report presents the main results from the surveys in January-March 2018. The surveys were performed with the Norwegian research vessels “Helmer Hanssen” and “Johan Hjort” and Russian research vessel “Fritjof Nansen”. ... -
Fish Investigations in the Barents Sea Winter 2019
Mehl, Sigbjørn; Wenneck, Thomas de Lange; Aglen, Asgeir; Fuglebakk, Edvin; Gjøsæter, Harald; Godiksen, Jane Aanestad; Seim, Silje Elisabeth; Staby, Arved; Bogstad, Bjarte; Russkikh, Alexey A.; Fomin, Konstantin (IMR/PINRO Joint Report Series;, Research report, 2019)The Institute of Marine Research (IMR), Bergen, has performed acoustic measurements of demersal fish in the Barents Sea since 1976. Since 1981 a bottom trawl survey has been combined with the acoustic survey. Typical effort ... -
Genetic management of mixed-stock fisheries "real-time": The case of the largest remaining cod fishery operating in the Atlantic in 2007-2017
Dahle, Geir; Johansen, Torild; Westgaard, Jon-Ivar; Aglen, Asgeir; Glover, Kevin (Journal article; Peer reviewed, 2018)Fish stocks represent fundamental units in fisheries management, and their identification, especially in mixed-fisheries, represents one of the primary challenges to sustainable harvest. Here, we describe the first “real-time” ... -
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 ... -
Kysttorsk nord for 62-grader nord : Vurdering av status og forslag til forvaltningstiltak og ny gjenoppbyggingsplan
Aglen, Asgeir; Nedreaas, Kjell Harald; Knutsen, Jan Atle; Huse, Geir (Fisken og havet;2020 - 2, Research report, 2020)Denne rapporten setter søkelys på vurdering av status for kysttorsk nord for 62 o N, bestandsstruktur, overvåkning, gjenoppbyggingsplan og mulige forvaltningstiltak. Rapporten inneholder lite om biologi, alder, vekst og ... -
“Real-time” genetic monitoring of a commercial fishery on the doorstep of an MPA reveals unique insights into the interaction between coastal and migratory forms of the Atlantic cod
Johansen, Torild; Westgaard, Jon-Ivar; Seliussen, Bjørghild Breistein; Nedreaas, Kjell Harald; Dahle, Geir; Glover, Kevin; Kvalsund, Roger; Aglen, Asgeir (Journal article; Peer reviewed, 2017)With the decline of many of the world’s fisheries, increased regulation, including marine protected areas (MPA), forms an increasingly important role in promoting sustainable resource use. Here, we present a novel “real-time” ... -
A “snowcrab-bag” attached to the fishing line of Campelen 1800 research trawl : Does it affect the catch rates and species composition in the cod end?
Aglen, Asgeir; Pavlenkov, Alexander; Hjelset, Ann Merete; Fuglebakk, Edvin; Engås, Arill (IMR/PINRO Joint Report Series;, Research report, 2019)For monitoring abundance and distribution of snow crab in the Barents Sea, data from the bottom trawl surveys in winter (February) and in autumn (August-September) are used. The data collected in the autumn survey is ... -
The making of a genetic cline: introgression of oceanic genes into coastal cod populations in the Northeast Atlantic
Jorde, Per Erik; Huserbråten, Mats Brockstedt Olsen; Seliussen, Bjørghild Breistein; Myksvoll, Mari Skuggedal; Vikebø, Frode Bendiksen; Dahle, Geir; Aglen, Asgeir; Johansen, Torild (Peer reviewed; Journal article, 2021)Abstract: Coastal Atlantic cod (Gadus morhua) in the Northeast Atlantic has seen a continuous decline since the industrialization of the coastal fishery, and management needs to address the spatial and temporal complexities ... -
Trapped in the TAC Machine: Making a Fisheries-Based Indicator System for Coastal Cod in Steigen, Norway
Holm, Petter; Aglen, Asgeir; Bjørkan, Maiken; Andersen, Jan (Chapter, 2020)