Blar i Publikasjoner fra CRIStin på forfatter "Hansen, Cecilie"
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A standard protocol for describing the evaluation of ecological models
Planque, Benjamin; Aarflot, Johanna Myrseth; Buttay, Lucie; Carroll, JoLynn; Fransner, Sara Filippa Krusmynta; Hansen, Cecilie; Husson, Berengere; Langangen, Øystein Ole Gahr; Lindstrøm, Ulf Ove; Pedersen, Torstein; Primicerio, Raul; Sivel, Elliot Manuarii; Skogen, Morten D.; Strombom, Evelyn; Stige, Leif Christian; Varpe, Øystein; Yoccoz, Nigel (Peer reviewed; Journal article, 2022)Numerical models o ecological systems are increasingly used to address complex environmental and resource management questions. One challenge or scientists, managers, and stakeholders is to appraise how well suited these ... -
Assessing the importance of zooplankton sampling patterns with an ecosystem model
Hjøllo, Solfrid Sætre; Hansen, Cecilie; Skogen, Morten D. (Peer reviewed; Journal article, 2021)The copepod Calanus finmarchicus is the dominant species of mesozooplankton in the Norwegian Sea and an important food source for multiple commercially exploited pelagic fish stocks. In addition to the patchy distribution ... -
Assessing the state of the Barents Sea using indicators: How, when, and where?
Hansen, Cecilie; van der Meeren, Gro Ingleid; Loeng, Harald; Skogen, Morten D. (Peer reviewed; Journal article, 2021)Two end-to-end ecosystem models, NORWECOM.E2E and NoBa Atlantis, have been used to explore a selection of indicators from the Barents Sea Management plans (BSMP). The indicators included in the BSMP are a combination of ... -
Balanced harvest: concept, policies, evidence, and management implications
Zhou, Shijie; Kolding, Jeppe; Garcia, Serge M.; Plank, Michael J.; Bundy, Alida; Charles, Anthony; Hansen, Cecilie; Heino, Mikko Petteri; Howell, Daniel; Jacobsen, Nis S.; Reid, David G.; Rice, Jake C.; van Zwieten, Paul A.M. (Journal article; Peer reviewed, 2019)Balanced harvest has been proposed to reduce fishing impact on ecosystems while simultaneously maintaining or even increasing fishery yield. The concept has attracted broad interest, but also received criticisms. In this ... -
Balanced harvesting in a variable and uncertain world – a case study from the Barents Sea.
Howell, Daniel; Hansen, Cecilie; Bogstad, Bjarte; Skern-Mauritzen, Mette (Journal article; Peer reviewed, 2016-03-21) -
Ecosystem-Based Harvest Control Rules for Norwegian and US Ecosystems
Kaplan, Isaac C.; Hansen, Cecilie; Morzaria-Luna, Hem Nalini; Girardin, Raphael; Marshall, Kristin N. (Peer reviewed; Journal article, 2020) -
Exploring the role of Northeast Atlantic cod in the Barents Sea food web using a multi-model approach
Nilsen, Ina; Hansen, Cecilie; Kaplan, Isaac; Holmes, Elizabeth; Langangen, Øystein Ole Gahr (Peer reviewed; Journal article, 2022)It is commonly accepted that no ecosystem model is the ‘best’, but rather that ecosystem models should be used in ensembles. This is also the case for the Barents Sea ecosystem, where we have used two different ecosystem ... -
Exploring the role of Northeast Atlantic cod in the Barents Sea food web using a multi-model approach
Nilsen, Ina; Hansen, Cecilie; Kaplan, Isaac; Holmes, Elizabeth; Langangen, Øystein Ole Gahr (Peer reviewed; Journal article, 2022)It is commonly accepted that no ecosystem model is the ‘best’, but rather that ecosystem models should be used in ensembles. This is also the case for the Barents Sea ecosystem, where we have used two different ecosystem ... -
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, ... -
Gaussian mixture models reveal highly diverse targeting tactics in a coastal fishing fleet
Liu, Xiaozi; Hansen, Cecilie; Nedreaas, Kjell Harald; Stockhausen, Hagen; Heino, Mikko Petteri (Peer reviewed; Journal article, 2022)Fishermen make repeated choices with respect to when, where, and how to catch their target species. While these targeting tactics—and the factors shaping them—are known to fishers and some experts, knowledge about them is ... -
Management Scenarios Under Climate Change – A Study of the Nordic and Barents Seas
Hansen, Cecilie; Nash, Richard David Marriott; Drinkwater, Kenneth F.; Hjøllo, Solfrid Sætre (Journal article; Peer reviewed, 2019)The effects of increasing fishing pressure in combination with temperature increases in the Nordic and Barents Seas have been evaluated using an end-to-end model for the area forced by a downscaled RCP 4.5 climate scenario. ... -
MILJØVERDIERS SÅRBARHET I NORSKE HAVOMRÅDER — En gjennomgang av sårbarhet til ulike typer påvirkninger i foreslåtte særlig verdifulle og sårbare områder i norske havområder
Hansen, Cecilie; Hjøllo, Solfrid Sætre; Ottersen, Geir; Skern-Mauritzen, Mette (Rapport fra havforskningen;2022 - 33, Research report, 2022)Det er gjennomført en kunnskapsbasert vurdering av sårbarhet med konfidens for de viktigste påvirkninger på miljøverdier i norske havområder generelt, og for hvert av områdene som er foreslått som Særlig verdifulle og ... -
Multiple stakeholders’ perspectives of marine social ecological systems, a case study on the Barents Sea
Mikkelsen, Nina; Planque, Benjamin; Arneberg, Per; Skern-Mauritzen, Mette; Hansen, Cecilie; Fauchald, Per; Holsman, Kirstin K.; Haynie, Alan C.; Ottersen, Geir (Peer reviewed; Journal article, 2023)The Barents Sea ecosystem components and services are under pressure from climate change and other anthropogenic impacts. Following an Ecosystem-based management approach, multiple simultaneous pressures are addressed by ... -
Patterns, efficiency and ecosystem effects when fishing Calanus finmarchicus in the Norwegian Sea—using an individual-based model
Hansen, Cecilie; Skogen, Morten D.; Utne, Kjell Rong; Broms, Cecilie; Strand, Espen; Hjøllo, Solfrid Sætre (Peer reviewed; Journal article, 2021)Due to the important role of Calanus finmarchicus as key prey for the abundant pelagic fish stocks (Northeast Atlantic mackerel, Norwegian spring spawning herring, blue whiting) in the Norwegian Sea, an increase in the ... -
Quantification of trophic interactions in the Norwegian Sea pelagic food-web over multiple decades
Planque, Benjamin; Favreau, Aurelien; Husson, Berengere; Mousing, Erik Askov; Hansen, Cecilie; Broms, Cecilie; Lindstrøm, Ulf Ove; Sivel, Elliot Manuarii (Peer reviewed; Journal article, 2022)While ecosystem-based fisheries management calls for explicit accounting for interactions between exploited populations and their environment, moving from single species to ecosystem-level assessment is a significant ... -
A Review of Applications Evaluating Fisheries Management Scenarios through Marine Ecosystem Models.
Perryman, Holly Ann; Hansen, Cecilie; Howell, Daniel; Olsen, Erik Joel Steinar (Peer reviewed; Journal article, 2021)Management Strategy Evaluation (MSE) is a framework to explore the tradeoffs amongst fishing strategies and assess the consequences for achieving management goals provided sources of uncertainty by means of simulation ... -
Risikoanalyse for de norske havområdene om direkte og indirekte virkninger av klimaendringer på marine økosystemer under ulike utslippsscenarier - Risikorapport om hav og klima
Sandø, Anne Britt; Hjøllo, Solfrid Sætre; Hansen, Cecilie; Skogen, Morten D.; Hordoir, Robinson; Sundby, Svein (Rapport fra havforskningen;2022 - 41, Research report, 2022)Bakgrunn for denne rapporten var at regjeringen ønsket å gjennomføre en risikoanalyse for norske havområder av direkte og indirekte virkninger av klimaendringer på marine økosystemer under ulike utslippsscenarier. ... -
Samlet påvirkning i foreslåtte særlig verdifulle og sårbare områder i norske havområder
Hansen, Cecilie; Aarflot, Johanna Myrseth; Eriksen, Elena; Husson, Berengere; Fauchald, Per; Johansen, Geir Odd; Jørgensen, Lis Lindal; van der Meeren, Gro Ingleid; Mikkelsen, Nina; Ottersen, Geir; von Quillfeldt, Cecilie; Skern-Mauritzen, Mette (Rapport fra havforskningen;2022 - 46, Research report, 2022)I dette arbeidet er det gjort en vurdering av risiko fra samlet påvirkning med tilhørende usikkerhet for aktive sektorer i norske havområder, for hvert av havområdene Nordsjøen, Norskehavet og Barentshavet, og for hvert ... -
Sensitivity of the Norwegian and Barents Sea Atlantis end-to-end ecosystem model to parameter perturbations of key species
Hansen, Cecilie; Drinkwater, Kenneth F.; Jähkel, Anne; Fulton, Elizabeth A.; Gorton, Rebecca; Skern-Mauritzen, Mette (Journal article; Peer reviewed, 2019)Using end-to-end models for ecosystem-based management requires knowledge of the structure, uncertainty and sensitivity of the model. The Norwegian and Barents Seas (NoBa) Atlantis model was implemented for use in ‘what ... -
A standard protocol for describing the evaluation of ecological models
Planque, Benjamin; Aarflot, Johanna Myrseth; Buttay, Lucie; Carroll, JoLynn; Fransner, Sara Filippa Krusmynta; Hansen, Cecilie; Husson, Berengere; Langangen, Øystein Ole Gahr; Lindstrøm, Ulf Ove; Pedersen, Torstein; Primicerio, Raul; Sivel, Elliot Manuarii; Skogen, Morten D.; Strombom, Evelyn; Stige, Leif Christian; Varpe, Øystein; Yoccoz, Nigel (Peer reviewed; Journal article, 2022)Numerical models of ecological systems are increasingly used to address complex environmental and resource management questions. One challenge for scientists, managers, and stakeholders is to appraise how well suited these ...