Blar i Brage IMR på forfatter "Ono, Kotaro"
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Advice on fishing opportunities for Barents Sea capelin in 2024 — ICES subareas 1 and 2 excluding Division 2.a west of 5°W
Howell, Daniel; Nielsen, Anders; Stock, Brian; Ono, Kotaro; Clain, Laura; Fossheim, Maria; Wenneck, Thomas de Lange; Harbitz, Alf; Rodriguez, Alfonso Pérez; Iriondo, Ane; Staby, Arved; Bogstad, Bjarte; Husson, Berengere; Marshall, C. Tara; Tranang, Caroline Aas; Johannesen, Edda; Vozgirdas, Eduardas; Eriksen, Elena; Eidset, Elise; Hallfredsson, Elvar H.; Berg, Erik; Skaret, Georg; Höffle, Hannes; Jacobsen, Jan Arge; Stiansen, Jan Erik; Godiksen, Jane Aanestad; Janusz, Jerzy; Fall, Johanna Jennifer Elisabeth; Trochta, John Tyler; Gondra, Jon Ruiz (IMR/PINRO Joint Report Series, Research report, 2023) -
Coastal Research Seen Through an Early Career Lens—A Perspective on Barriers to Interdisciplinarity in Norway
Deininger, Anne; Martin, Angela Helen; Pardo, Juan; Berg, Paul Ragnar; Bhardwaj, Jyotirmoy; Catarino, Diana; Fernández-Chacón, Albert; Martinez-Swatson, Karen Agatha; Ono, Kotaro; Oomen, Rebekah Alice; Sodeland, Marte; Sørdalen, Tonje Knutsen; Synnes, Ann-Elin; Thorbjørnsen, Susanna Huneide; Thormar, Jonas (Peer reviewed; Journal article, 2021)The value of interdisciplinarity for solving complex coastal problems is widely recognized. Many early career researchers (ECRs) therefore actively seek this type of collaboration through choice or necessity, for professional ... -
Direct and indirect effects of sea ice cover on major zooplankton groups and planktivorous fishes in the Barents Sea
Stige, Leif Christian; Eriksen, Elena; Dalpadado, Padmini; Ono, Kotaro (Peer reviewed; Journal article, 2019)Reductions in Arctic sea ice affect marine food webs through a multitude of direct and indirect effects. We here analysed direct, indirect, and delayed associations between winter sea ice cover and year-to-year changes in ... -
Discards of cod (Gadus morhua) in the Norwegian coastal fisheries: improving past and future estimates
Hilde Sofie Fantoft, Berg; Clegg, Tom; Blom, Geir; Kolding, Jeppe; Ono, Kotaro; Nedreaas, Kjell Harald (Peer reviewed; Journal article, 2022)Discarding can be an unknown source of biases and uncertainties in stock assessments. Discarding patterns and quantities vary so a routine methodology for estimating discards is important to give a better picture of total ... -
Effects of early life mass mortality events on fish populations
Langangen, Øystein Ole Gahr; Ohlberger, Jan Philipp; Stige, Leif Christian; Patin, Rémi; Buttay, Lucie; Stenseth, Nils Christian; Ono, Kotaro; Durant, Joël (Peer reviewed; Journal article, 2022)Mass mortality events are ubiquitous in nature and can be caused by, for example, diseases, extreme weather and human perturbations such as contamination. Despite being prevalent and rising globally, how mass mortality in ... -
Effects of early life mass mortality events on fish populations
Langangen, Øystein Ole Gahr; Ohlberger, Jan Philipp; Stige, Leif Christian; Patin, Rémi; Buttay, Lucie; Stenseth, Nils Christian; Ono, Kotaro; Durant, Joël (Peer reviewed; Journal article, 2022)Mass mortality events are ubiquitous in nature and can be caused by, for example, diseases, extreme weather and human perturbations such as contamination. Despite being prevalent and rising globally, how mass mortality in ... -
Empirical evidence of nonlinearity in bottom up effect in a marine predator-prey system
Durant, Joël; Ono, Kotaro; Langangen, Øystein Ole Gahr (Peer reviewed; Journal article, 2022)Strength of species interaction may have profound effects on population dynamics. Empirical estimates of interaction strength is often based on the assumption that the interaction strengths are constant. Barents Sea cod ... -
Evaluating assumptions behind design-based estimators for unreported catches
Clegg, Thomas L; Fuglebakk, Edvin; Ono, Kotaro (Peer reviewed; Journal article, 2023)Understanding a fishery’s impact on the marine ecosystem requires a quantification of total catches, which include unreported catches. For recent years in Norwegian waters, unreported catches have been estimated using data ... -
Final report for the REDUS project - Reduced Uncertainty in Stock Assessment
Olsen, Erik Joel Steinar; Aanes, Sondre; Aldrin, Magne Tommy; Breivik, Olav Nikolai; Fuglebakk, Edvin; Goto, Daisuke; Handegard, Nils Olav; Hansen, Cecilie; Holmin, Arne Johannes; Howell, Daniel; Johnsen, Espen; Jourdain, Natoya; Korsbrekke, Knut; Ono, Kotaro; Otterå, Håkon Magne; Perryman, Holly Ann; Subbey, Samuel; Søvik, Guldborg; Umar, Ibrahim; Vatnehol, Sindre; Vølstad, Jon Helge (Rapport fra havforskningen;2021 - 16, Research report, 2021)The REDUS project (2016-2020) has been a strategic project at the Institute of Marine Research (IMR) aimed at quantifying and reducing the uncertainty in data-rich and age-structured stock assessments (e.g., cod, herring, ... -
Kartlegging av menneskelig aktivitet på utvalgte gytefelt for kysttorsk nord for 62°N
Fall, Johanna Jennifer Elisabeth; Nedreaas, Kjell Harald; Ono, Kotaro; Otterå, Håkon Magne; Gundersen, Sofie (Rapport fra havforskningen;2024 - 9, Research report, 2024)Formålet med denne rapporten er kartlegging av fiskeriaktivitet og annen menneskelig aktivitet på og rundt høyt verdisatte gytefelt for kysttorsk for å identifisere områder som kan egne seg som verneområder. Rapporten ... -
Non‐linearity in interspecific interactions in response to climate change: cod and haddock as an example
Durant, Joel Marcel; Ono, Kotaro; Stenseth, Nils Christian; Langangen, Øystein (Peer reviewed; Journal article, 2020)Climate change has profound ecological effects, yet our understanding of how trophic interactions among species are affected by climate change is still patchy. The sympatric Atlantic haddock and cod are co‐occurring across ... -
Poleward spawning of Atlantic mackerel (Scomber scombrus) is facilitated by ocean warming but triggered by energetic constraints
dos Santos Schmidt, Thassya Christina; Slotte, Aril; Olafsdottir, Anna H.; Nøttestad, Leif; Jansen, Teunis; Jacobsen, Jan Arge; Bjarnason, Sigurvin; Lusseau, Susan Mærsk; Ono, Kotaro; Hølleland, Sondre Nedreås; Thorsen, Anders; Sandø, Anne Britt; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2023)The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf ... -
Possible adverse impact of contaminants on Atlantic cod population dynamics in coastal ecosystems
Ono, Kotaro; Knutsen, Halvor; Olsen, Esben Moland; Ruus, Anders; Hjermann, Dag Øystein; Stenseth, Nils Christian (Journal article; Peer reviewed, 2019)While many in-laboratory ecotoxicological studies have shown the adverse impact of pollutants to the fitness of an individual, direct evidence from the field on the population dynamics of wildlife animals has been lacking. ... -
Recruitment regime shifts and nonstationarity are widespread phenomena in harvestable stocks experiencing pronounced climate fluctuations
Ma, Shuyang; Huse, Geir; Ono, Kotaro; Nash, Richard David Marriott; Sandø, Anne Britt; Nedreaas, Kjell Harald; Hjøllo, Solfrid Sætre; Sundby, Svein; Clegg, Thomas L; Vølstad, Jon Helge; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2023)Methods to reliably identify jump discontinuities in biological time series and to assess the specific contribution of various covariates are rapidly progressing. Here, we took advantage of these statistical improvements ... -
Shaping sustainable harvest boundaries for marine populations despite estimation bias
Goto, Daisuke; Devine, Jennifer Ann; Umar, Ibrahim; Fischer, Simon; Oliveira, Jose; Howell, Daniel; Jardim, Ernesto; Mosquiera, Iago; Ono, Kotaro (Peer reviewed; Journal article, 2021)Biased estimates of population status are a pervasive conservation problem. This problem has plagued assessments of commercial exploitation of marine species and can threaten the sustainability of both populations and ... -
A simulation approach to assessing bias in a fisheries self-sampling programme
Clegg, Tom; Fuglebakk, Edvin; Ono, Kotaro; Vølstad, Jon Helge; Nedreaas, Kjell Harald (Peer reviewed; Journal article, 2021)The hierarchical structure and non-probabilistic sampling in fisher self-sampling programmes makes it difficult to evaluate biases in total catch estimates. While so, it is possible to evaluate bias in the reported component ... -
Space-time recapture dynamics of PIT-tagged Northeast Atlantic mackerel (Scomber scombrus) reveal size-dependent migratory behaviour
Ono, Kotaro; Slotte, Aril; Hølleland, Sondre Nedreås; Mackinson, Steven; Jónsson, Sigurður Þór; Jacobsen, Jan Arge; Ólafsdóttir, Anna Heiða (Peer reviewed; Journal article, 2022)Based on GIS-mapping and semi-parametric modelling of recaptures from PIT-tag experiments in the North Sea nursery area (September 2011), the Celtic Seas spawning area (May-June 2014-2021) and the Icelandic Waters feeding ... -
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 ... -
Workshop on seabird bycatch monitoring in the NEAFC regulatory areas (WKBB)
Kingston, Allen; Campbell, Neil; Clark, Bethany L.; Hornborg, Sara; Martinez, Roi; Mateo, Maria; Ono, Kotaro; Rouxel, Yann; Tarroux, Arnaud; Verutes, Gregg (ICES Scientific Reports, Research report, 2024)In 2021, ICES received a special request for advice from the North-East Atlantic Fisheries Commission (NEAFC) on seabird bycatch in the NEAFC regulatory areas (RAs). Data scoping exercises conducted in 2021, 2022, and 2023 ...