Browsing Brage IMR by Author "Olsen, Esben Moland"
Now showing items 1-20 of 95
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Activity patterns of wild European lobster Homarus gammarus in coastal marine reserves: implications for future reserve design
Moland, Even; Olsen, Esben Moland; Knutsen, Halvor; Knutsen, Jan Atle; Enersen, Svein Erik; André, Carl; Stenseth, Nils Christian (Journal article; Peer reviewed, 2011-05-16)European lobster Homarus gammarus in Norway has been in decline over the last 30 to 40 yr, and the species is currently red listed according to International Union for Conservation of Nature criteria. In 2006, experimental ... -
Anthropogenic and natural size-related selection act in concert during brown trout (Salmo trutta) smolt river descent
Haraldstad, Tormod; Höglund, Erik; Kroglund, Frode; Olsen, Esben Moland; Hawley, Kate Louise; Haugen, Thrond Oddvar (Peer reviewed; Journal article, 2020)By hindering migration and inducing direct turbine mortality during downstream migration, hydropower is regarded as one of the most serious threats to anadromous salmonids. Yet, little attention has been paid to long-term ... -
Are low but statistically significant levels of genetic differentiation in marine fishes ‘biologically meaningful’? A case study of coastal Atlantic cod
Knutsen, Halvor; Olsen, Esben Moland; Jorde, Per Erik; Espeland, Sigurd Heiberg; André, Carl (Journal article; Peer reviewed, 2010-12-29)A key question in many genetic studies on marine organisms is how to interpret a low but statistically significant level of genetic differentiation. Do such observations reflect a real phenomenon, or are they caused by ... -
Are low but statistically significant levels of genetic differentiation in marine fishes ‘biologically meaningful’? A case study of coastal Atlantic cod
Knutsen, Halvor; Olsen, Esben Moland; Jorde, Per Erik; Espeland, Sigurd Heiberg; André, Carl (Journal article; Peer reviewed, 2010-12-29)A key question in many genetic studies on marine organisms is how to interpret a low but statistically significant level of genetic differentiation. Do such observations reflect a real phenomenon, or are they caused by ... -
Assessing changes in age and size at maturation in collapsing populations of Atlantic cod (Gadus morhua)
Olsen, Esben Moland; Lilly, George R.; Heino, Mikko; Morgan, M. Joanne; Brattey, John; Dieckmann, Ulf (Journal article; Peer reviewed, 2005)By estimating probabilistic reaction norms for age and size at maturation, we show that maturation schedules of Atlantic cod (Gadus morhua) off Labrador and Newfoundland shifted toward earlier ages and smaller sizes ... -
Atlantic cod individual spatial behaviour and stable isotope associations in a no-take marine reserve
Monk, Christopher; Power, Michael; Freitas, Carla; Harrison, Philip M.; Heupel, Michelle; Kuparinen, Anna; Moland, Even; Simpfendorfer, Colin; Villegas-Ríos, David; Olsen, Esben Moland (Peer reviewed; Journal article, 2023)Foraging is a behavioural process and, therefore, individual behaviour and diet are theorized to covary. However, few comparisons of individual behaviour type and diet exist in the wild. We tested whether behaviour type ... -
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Attraction of cod Gadus morhua from coastal spawning grounds to salmon farms
Skjæraasen, Jon Egil; Karlsen, Ørjan; Langangen, Øystein Ole Gahr; Meier, Sonnich; Dunlop, Katherine Mary; van der Meeren, Terje; Keeley, Nigel B.; Myksvoll, Mari Skuggedal; Dahle, Geir; Moland, Even; Nilsen, Rune; Elvik, Kristine Marit Schrøder; Bannister, Raymond; Olsen, Esben Moland (Peer reviewed; Journal article, 2022)Wild fish aggregate at aquaculture net-pens, but the underlying mechanisms are not fully understood. This study examined how salmon farms attract coastal Atlantic cod Gadus morhua from their inshore spawning grounds. ... -
Behavioral responses of Atlantic cod to sea temperature changes
Freitas, Carla; Olsen, Esben Moland; Moland, Even; Ciannelli, Lorenzo; Knutsen, Halvor (Journal article; Peer reviewed, 2015-04-17) -
Behavioural responses of wild, spawning Atlantic cod (Gadus morhua L.) to seismic airgun exposure
McQueen, Kate; Skjæraasen, Jon Egil; Nyqvist, D; Olsen, Esben Moland; Karlsen, Ørjan; Meager, Justin James; Kvadsheim, Petter Helgevold; Handegard, Nils Olav; Forland, Tonje Nesse; de Jong, Karen; Sivle, Lise Doksæter (Peer reviewed; Journal article, 2023)Seismic airgun surveys to map petroleum deposits in the seabed may impact behaviour of marine animals over large distances. Understanding whether fish spawning behaviour is affected by this anthropogenic noise source is ... -
BioTIME: A database of biodiversity time series for the Anthropocene
Dornelas, Maria; Antao, Laura H.; Moyes, Faye; Bates, Amanda E.; Magurran, Anne E.; Adam, Dusan; Akhmetzhanova, Asem A.; Appeltans, Ward; Arcos, Jose Manuel; Arnold, Haley; Ayyappan, Narayanan; Badihi, Gal; Baird, Andres H.; Barbosa, Miguel; Barreto, Tiago Egydio; Bässler, Claus; Bellgrove, Alecia; Belmaker, Jonathan; Benedetti-Cecchi, Lisandro; Bett, Brian J.; Bjorkman, Anne D.; Błazewicz, Magdalena; Blowes, Shane A.; Bloch, Christopher P.; Bonebrake, Timothy C.; Boyd, Susan; Bradford, Matt; Brooks, Andrew J.; Brown, James H.; Bruelheide, Helge; Budy, Phaedra; Carvalho, Fernando; Castaneda-Moya, Edward; Chen, Chaolun Allen; Chamblee, John F.; Chase, Tory J.; Collier, Laura Siegwart; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Cotano, Unai; Crow, Shannan Kyle; Damasceno, Gabriella; Davies, Claire H.; Davis, Robert A.; Day, Frank P.; Degraer, Steven; Doherty, Tim S.; Dunn, Timothy E.; Durigan, Giselda; Hofgaard, Annika; Johannessen, Tore; Klanderud, Kari; Knutsen, Halvor; Olsen, Esben Moland (Peer reviewed; Journal article, 2018) -
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, ... -
Conservation, Spillover and Gene Flow within a Network of Northern European Marine Protected Areas
Huserbråten, Mats Brockstedt Olsen; Moland, Even; Knutsen, Halvor; Olsen, Esben Moland; André, Carl; Stenseth, Nils Chr. (Journal article; Peer reviewed, 2013-09-06)To ensure that marine protected areas (MPAs) benefit conservation and fisheries, the effectiveness of MPA designs has to be evaluated in field studies. Using an interdisciplinary approach, we empirically assessed the design ... -
Conservation, Spillover and Gene Flow within a Network of Northern European Marine Protected Areas
Huserbråten, Mats Brockstedt Olsen; Moland, Even; Knutsen, Halvor; Olsen, Esben Moland; André, Carl; Stenseth, Nils Christian (Peer reviewed; Journal article, 2013)To ensure that marine protected areas (MPAs) benefit conservation and fisheries, the effectiveness of MPA designs has to be evaluated in field studies. Using an interdisciplinary approach, we empirically assessed the design ... -
Continuous sound from a marine vibrator causes behavioural responses of free-ranging, spawning Atlantic cod (Gadus morhua)
McQueen, Kate; Sivle, Lise Doksæter; Forland, Tonje Nesse; Meager, Justin James; Skjæraasen, Jon Egil; Olsen, Esben Moland; Karlsen, Ørjan; Kvadsheim, Petter Helgevold; de Jong, Karen (Peer reviewed; Journal article, 2024)Marine vibrators are a new technology being developed for seismic surveys. These devices can transmit continuous instead of impulsive sound and operate over a narrower frequency band and at lower peak pressure than airguns, ... -
Contrasting management regimes indicative of mesopredator release in temperate coastal fish assemblages
Synnes, Ann-Elin; Olsen, Esben Moland; Jorde, Per Erik; Knutsen, Halvor; Moland, Even (Peer reviewed; Journal article, 2023)The absence of functional top predators has been proposed as a mechanism acting to shape fish assemblages in temperate marine ecosystems, with cascading effects on lower trophic levels. We explore this scenario by comparing ... -
Demographic responses to protection from harvesting in a long-lived marine species
Fernández-Chacón, Albert; Buttay, Lucie; Moland, Even; Knutsen, Halvor; Olsen, Esben Moland (Peer reviewed; Journal article, 2021)Marine protected areas (MPAs) are usually considered to have positive effects on the recovery of over-exploited populations. However, resolving the extent to which MPAs function according to their conservation goals requires ... -
Diel vertical migration patterns in juvenile cod from the Skagerrak coast
Espeland, Sigurd Heiberg; Thoresen, Adine Guldborg; Olsen, Esben Moland; Stige, Leif Christian; Knutsen, Halvor; Gjøsæter, Jakob; Stenseth, Nils Christian (Journal article; Peer reviewed, 2010-04-29)We demonstrated a clear year-round diel vertical migration pattern (DVM) of small (26 to 45 cm) Skagerrak coastal cod Gadus morhua on a small geographic scale. Generalized additive models (GAMs) were used to make inferences ... -
Digital Data Help Explain Drivers of Angler Satisfaction: An Example from Southern Norway
Johansen, Kurt; Olsen, Esben Moland; Haraldstad, Tormod; Arlinghaus, Robert; Höglund, Erik (Peer reviewed; Journal article, 2022)We analyzed trip-level self-reports collected by a cell phone app to understand angler satisfaction of fishing for sea trout Salmo trutta (anadromous Brown Trout) in southern Norway. We found no clear support for a positive ... -
Digital Data Help Explain Drivers of Angler Satisfaction: An Example from Southern Norway
Johansen, Kurt; Olsen, Esben Moland; Haraldstad, Tormod; Arlinghaus, Robert; Höglund, Erik (Peer reviewed; Journal article, 2022)We analyzed trip-level self-reports collected by a cell phone app to understand angler satisfaction of fishing for sea trout Salmo trutta (anadromous Brown Trout) in southern Norway. We found no clear support for a positive ...