Browsing NR vitenarkiv by Author "Aldrin, Magne Tommy"
Now showing items 1-20 of 20
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The aerosol pathway is crucial for observationally constraining climate sensitivity and anthropogenic forcing
Skeie, Ragnhild Bieltvedt; Aldrin, Magne Tommy; Berntsen, Terje Koren; Holden, Marit; Huseby, Ragnar Bang; Myhre, Gunnar; Storelvmo, Trude (Journal article; Peer reviewed, 2024)Climate sensitivity and aerosol forcing are two of the most central, but uncertain, quantities in climate science that are crucial for assessing historical climate as well as future climate projections. Here, we use a ... -
Caveats with estimating natural mortality rates in stock assessment models using age aggregated catch data and abundance indices
Aldrin, Magne Tommy; Aanes, Fredrik L; Tvete, Ingunn Fride; Aanes, Sondre; Subbey, Samuel (Journal article; Peer reviewed, 2021) -
Classification of acoustic survey data: A comparison between seven teams of experts
Fall, Johanna Jennifer Elisabeth; Gjøsæter, Harald; Tvete, Ingunn Fride; Aldrin, Magne Tommy (Journal article; Peer reviewed, 2024)Acoustic surveys of mixed fish aggregations often rely on manual allocation of acoustic energy to target species, with auxiliary information such as trawl catches and target strength distributions aiding interpretation. ... -
Condition factor tailored to lumpfish (Cyclopterus lumpus) used as cleaner fish in salmonid farms
Engebretsen, Solveig; Aldrin, Magne Tommy; Lunde, Liss; Austad, Marthe; Rafoss, Trond; Danielsen, Ole Roald; Lindhom, Andreas; Boissonnot, Lauris Jeannine Ernestine; Jansen, Peder Andreas (Peer reviewed; Journal article, 2024)Lumpfish (Cyclopterus lumpus) are extensively used as part of the control measures against salmon lice in fish farms. In recent years, there has been an increased focus on lumpfish welfare, and how to increase survival of ... -
Consequences of reduced effectiveness of salmon lice treatments for lice control
Stige, Leif Christian; Huseby, Ragnar Bang; Helgesen, Kari Marie Olli; Aldrin, Magne Tommy; Qviller, Lars (Peer reviewed; Journal article, 2024)The effective control of ectoparasitic salmon lice, Lepeophtheirus salmonis, in fish farms is challenged by the salmon lice having developed resistance towards several antiparasitic drugs and by the effectiveness of ... -
Detecting significant retrospective patterns in state space fish stock assessment
Breivik, Olav Nikolai; Aldrin, Magne Tommy; Fuglebakk, Edvin; Nielsen, Anders (Journal article; Peer reviewed, 2023)Retrospective patterns are commonly investigated to validate fish stock assessment models. A widely applied measure for retrospective bias is Mohn’s ρ and corresponding retrospective plots. However, retrospective patterns ... -
Effect of testing criteria for infectious disease surveillance: The case of COVID-19 in Norway
Engebretsen, Solveig; Aldrin, Magne Tommy (Peer reviewed; Journal article, 2024)During the COVID-19 pandemic in Norway, the testing criteria and capacity changed numerous times. In this study, we aim to assess consequences of changes in testing criteria for infectious disease surveillance. We plotted ... -
Estimated effectiveness of treatments against salmon lice in marine salmonid farming
Aldrin, Magne Tommy; Huseby, Ragnar Bang; Stige, Leif Christian; Helgesen, Kari Marie Olli (Journal article; Peer reviewed, 2023)We here estimate the effectiveness of ten types of salmon lice treatments currently used in the salmonid industry by analysing daily and cage-wise data from 90 full production cycles from farms spread along the Norwegian ... -
Evaluating effects of different control strategies for Infectious Salmon Anaemia (ISA) in marine salmonid farming by scenario simulation using a disease transmission model
Aldrin, Magne Tommy; Huseby, Ragnar Bang; Jensen, Britt Bang; Jansen, Mona Dverdal (Journal article; Peer reviewed, 2021) -
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;, 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, ... -
Lusebeitingsadferd hos rognkjeks
Engebretsen, Solveig; Aldrin, Magne Tommy (Research report, 2020) -
Pilotprosjekt PO6: Scenariosimulering av lakselus i Midt-Norge
Engebretsen, Solveig; Aldrin, Magne Tommy; Klakegg, Barbo; Grøntvedt, Randi Nygaard; Jensen, Stig Rune; Nøst, Ole Anders; Selnæs, John (NR-notat;, Research report, 2025)I dette notatet vurderer vi ulike tiltak mot lakselus i produksjonsområde 6 ved hjelp av scenariosimulering fra en lusemodell. Vi tilpasser lusemodellen til historiske data fra BarentsWatch. I modellen inngår smitte mellom ... -
Real-time prediction of propulsion motor overheating using machine learning
Hellton, Kristoffer Herland; Tveten, Martin; Stakkeland, Morten; Engebretsen, Solveig; Haug, Ola; Aldrin, Magne Tommy (Journal article; Peer reviewed, 2021) -
Rensefiskbetingelser: Betingelser som fremmer lusespising hos rensefisk Faglig sluttrapport for FHF-prosjekt Rensefiskbetingelser (P.nr.: 901766)
Jansen, Peder A; Lindhom, Andreas; Danielsen, Ole Roald; Rafoss, Trond; Engebretsen, Solveig; Aldrin, Magne Tommy; Stige, Leif Christian (NR-notat;, Research report, 2024) -
Risiko for PD-smitte relatert til brønnbåtpasseringer og nærhet til slakterier
Aldrin, Magne Tommy; Huseby, Ragnar Bang; Jansen, Peder A (NR-notat;, Research report, 2023) -
Salmon lice (Lepeophtheirus salmonis) in the stomach contents of lumpfish (Cyclopterus lumpus) sampled from Norwegian fish farms: Relationship between lice grazing and operational conditions
Engebretsen, Solveig; Aldrin, Magne Tommy; Qviller, Lars; Stige, Leif Christian; Rafoss, Trond; Danielsen, Ole Roald; Lindhom, Andreas; Jansen, Peder A (Journal article; Peer reviewed, 2022) -
Salmon lice (Lepeophtheirus salmonis) in the stomach contents of lumpfish (Cyclopterus lumpus) sampled from Norwegian fish farms: Relationship between lice grazing and operational conditions
Engebretsen, Solveig; Aldrin, Magne Tommy; Qviller, Lars; Stige, Leif Christian; Rafoss, Trond; Danielsen, Ole Roald; Lindhom, Andreas; Jansen, Peder Andreas (Peer reviewed; Journal article, 2023)Cleaner fish are commonly used as a control measure against salmon lice infestations in salmonid farms. Lumpfish (Cyclopterus lumpus) is the most common cleaner fish species used in Norwegian farms. However, little is known ... -
Seasonal, diurnal and individual variation in Atlantic salmon (Salmo salar L.) swimming depth in commercial-scale sea cages
Ulvund, John Birger; Tvete, Ingunn Fride; Aldrin, Magne Tommy; Alfredsen, Jo Arve; Urke, Henning Andre; Kristensen, Torstein; Jansen, Peder A (Journal article; Peer reviewed, 2024)Atlantic salmon aquaculture may benefit from improved tools for behavioural monitoring and data-derived models that predict behaviour in commercial scale production cages. In the present study, timeseries depth registrations ... -
The specification of the data model part in the SAM model matters
Aldrin, Magne Tommy; Tvete, Ingunn Fride; Aanes, Sondre; Subbey, Samuel (Peer reviewed; Journal article, 2020) -
Vurdering av tiltak mot lakselus i PO3, for reduksjon av smittepress
Engebretsen, Solveig; Aldrin, Magne Tommy; Grøntvedt, Randi; Jansen, Peder; Nøst, Ole Anders (NR-notat;, Research report, 2021)