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Tonje Knutsen Sørdalen

Tonje Knutsen Sørdalen

Postdoctoral Research Fellow

Department of Natural Sciences >

 

+47 38 14 26 66

+47 936 27 433

I am a marine ecologist working on coastal species of crustacean and fish inside and outside marine protected areas (MPAs). I am particularly interested in eco-evolutionary processes with a focus on harvesting and protection effects, reproductive behaviour and sexual selection. Current research focus on the development of computer vision (deep learning) to detect, classify, track and re-identify fish in marine systems using an innovative combination of pit-telemetry and underwater cameras. In the past, I have used genetic parent-offspring relationships to study fine-scale mate selection in wild populations of European lobster and mark-recapture studies for assessing the selectivity and impact of the commercial wrasse fishery supplying the aquaculture industry with cleaner fish. I am also involved in various projects and development of underwater observational platforms and camera rigs and seamless integration of different data sources. Feel free to mention me in a post.

Projects

CoastVision

Arven

ShareVision

http://www.uia.no/senter-og-nettverk/senter-for-marin-forskning

http://coastalresearch.uia.no/

Scientific publications

  • Theberge, Kaitlyn; Sørdalen, Tonje Knutsen; Pugh, Tracy L.; Kindsvater, Holly K. (2024). Assessing the effects of female protections on size structure and spawning potential in two clawed lobster fisheries subject to varying exploitation levels. Fisheries Research. ISSN: 0165-7836. 280doi:10.1016/j.fishres.2024.107155.
  • Canovi, Noemi; Ellis, Benjamin A.; Sørdalen, Tonje Knutsen; Allken, Vaneeda; Halvorsen, Kim Aleksander Tallaksen; Malde, Ketil; Beyan, Cigdem (2024). Trajectory-based fish event classification through pre-training with diffusion models. Ecological Informatics. ISSN: 1574-9541. 82doi:10.1016/j.ecoinf.2024.102733.
  • Olsen, Ørjan Langøy; Sørdalen, Tonje Knutsen; Goodwin, Morten; Malde, Ketil; Knausgård, Kristian Muri; Halvorsen, Kim Aleksander Tallaksen (2023). A contrastive learning approach for individual re-identification in a wild fish population. Proceedings of the Northern Lights Deep Learning Workshop. 4doi:10.7557/18.6824.
  • Knutsen, Jan Atle; Kleiven, Alf Ring; Olsen, Esben Moland; Knutsen, Halvor; Espeland, Sigurd Heiberg; Sørdalen, Tonje Knutsen; Thorbjørnsen, Susanna Huneide; Hutchings, Jeffrey; Chacon, Albert Fernandez; Huserbråten, Mats Brockstedt Olsen; Villegas-Ríos, David; Halvorsen, Kim Aleksander Tallaksen; Kleiven, Portia Joy Nillos; Langeland, Thomas Kiland; Moland, Even (2021). Lobster reserves as a management tool in coastal waters: Two decades of experience in Norway. Marine Policy. ISSN: 0308-597X. 136doi:10.1016/j.marpol.2021.104908.
  • Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Olsen, Esben Moland (2022). Protection from fishing improves body growth of an exploited species. Proceedings of the Royal Society of London. Biological Sciences. ISSN: 0962-8452. 289 (1987). doi:10.1098/rspb.2022.1718.
  • Goodwin, Morten; Halvorsen, Kim Aleksander Tallaksen; Jiao, Lei; Knausgård, Kristian Muri; Martin, Angela Helen; Moyano, Marta; Oomen, Rebekah Alice; Rasmussen, Jeppe Have; Sørdalen, Tonje Knutsen; Thorbjørnsen, Susanna Huneide (2022). Unlocking the potential of deep learning for marine ecology: overview, applications, and outlook. ICES Journal of Marine Science. ISSN: 1054-3139. 79 (2). s 319 - 336. doi:10.1093/icesjms/fsab255.
  • Halvorsen, Kim Aleksander Tallaksen; Larsen, Torkel; Browman, Howard; Durif, Caroline; Aasen, Nicolai Ljøstad; Vøllestad, Leif Asbjørn; Cresci, Alessandro; Sørdalen, Tonje Knutsen; Bjelland, Reidun Marie; Skiftesvik, Anne Berit (2021). Movement patterns of temperate wrasses (Labridae) within a small marine protected area. Journal of Fish Biology. ISSN: 0022-1112. 99 (4). s 1513 - 1518. doi:10.1111/jfb.14825.
  • Moland, Even; Fernández-Chacón, Albert; Sørdalen, Tonje Knutsen; Villegas-Rios, David; Thorbjørnsen, Susanna Huneide; Halvorsen, Kim Aleksander Tallaksen; Huserbråten, Mats Brockstedt Olsen; Olsen, Esben Moland; Kleiven, Portia Joy Nillos; Kleiven, Alf Ring; Knutsen, Halvor; Espeland, Sigurd Heiberg; Freitas, Carla; Knutsen, Jan Atle (2021). Restoration of Abundance and Dynamics of Coastal Fish and Lobster Within Northern Marine Protected Areas Across Two Decades. Frontiers in Marine Science. ISSN: 2296-7745. doi:10.3389/fmars.2021.674756.
  • Knausgård, Kristian Muri; Wiklund, Arne; Sørdalen, Tonje Knutsen; Halvorsen, Kim Tallaksen; Kleiven, Alf Ring; Lei, Jiao; Goodwin, Morten (2021). Temperate fish detection and classification: a deep learning based approach. Applied intelligence (Boston). ISSN: 0924-669X. doi:10.1007/s10489-020-02154-9.
  • Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Vøllestad, Leif Asbjørn; Moland, Even; Olsen, Esben Moland (2020). Marine protected areas rescue a sexually selected trait in European lobster. Evolutionary Applications. ISSN: 1752-4571. 13 (9). s 2222 - 2233. doi:10.1111/eva.12992.
  • Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Larsen, Torkel; Browman, Howard; Rafoss, Trond; Albretsen, Jon; Skiftesvik, Anne Berit (2020). Mind the depth: The vertical dimension of a small-scale coastal fishery shapes selection on species, size, and sex in wrasses. Marine and Coastal Fisheries. ISSN: 1942-5120. 12 (6). s 404 - 422. doi:10.1002/mcf2.10131.
  • Kindsvater, Holly K.; Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Alonzo, Suzanne H. (2020). The consequences of size-selective fishing mortality for larval production and sustainable yield in species with obligate male care. Fish and Fisheries. ISSN: 1467-2960. 21 (6). s 1135 - 1149. doi:10.1111/faf.12491.
  • Olsvik, Erlend; Trinh, Christian M.D.; Knausgård, Kristian Muri; Wiklund, Arne; Sørdalen, Tonje Knutsen; Kleiven, Alf Ring; Lei, Jiao; Goodwin, Morten (2019). Biometric fish classification of temperate species using convolutional neural network with squeeze-and-excitation. Lecture Notes in Computer Science (LNCS). ISSN: 0302-9743. 11606 LNAIs 89 - 101. doi:10.1007/978-3-030-22999-3_9.
  • Sørdalen, Tonje Knutsen; Halvorsen, Kim Aleksander Tallaksen; Harrison, Hugo B.; Ellis, Charlie D.; Vøllestad, Leif Asbjørn; Knutsen, Halvor; Moland, Even; Olsen, Esben Moland (2018). Harvesting changes mating behaviour in European lobster. Evolutionary Applications. ISSN: 1752-4571. 11 (6). s 963 - 977. doi:10.1111/eva.12611.
  • Halvorsen, Kim Aleksander Tallaksen; Larsen, Torkel; Sørdalen, Tonje Knutsen; Vøllestad, Leif Asbjørn; Knutsen, Halvor; Olsen, Esben Moland (2017). Impact of harvesting cleaner fish for salmonid aquaculture assessed from replicated coastal marine protected areas. Marine Biology Research. ISSN: 1745-1000. 13 (4). s 359 - 369. doi:10.1080/17451000.2016.1262042.
  • Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Vøllestad, Leif Asbjørn; Skiftesvik, Anne Berit; Espeland, Sigurd Heiberg; Olsen, Esben Moland (2017). Sex-and size-selective harvesting of corkwing wrasse (Symphodus melops)-a cleaner fish used in salmonid aquaculture. ICES Journal of Marine Science. ISSN: 1054-3139. 74 (3). s 660 - 669. doi:10.1093/icesjms/fsw221.
  • Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen; Durif, Caroline; Knutsen, Halvor; Olsen, Esben Moland; Skiftesvik, Anne Berit; Rustand, Torborg Emmerhoff; Bjelland, Reidun Marie; Vøllestad, Leif Asbjørn (2016). Male biased sexual size dimorphism in the nest building corkwing wrasse (Symphodus melops): implications for a size regulated fishery. ICES Journal of Marine Science. ISSN: 1054-3139. 73 (10). s 2586 - 2594. doi:10.1093/icesjms/fsw135.
  • Ellis, Charlie; Hodgson, DJ; Andre, Carl; Sørdalen, Tonje Knutsen; Knutsen, Halvor; Griffiths, Amber (2015). Notes on Hardy's uncertainty principle for the Wigner distribution and Schrödinger evolutions. PLOS ONE. ISSN: 1932-6203. 525 (1). doi:10.1016/j.jmaa.2023.127116.
  • Sørdalen, Tonje Knutsen; Malde, Ketil; Halvorsen, Kim Aleksander Tallaksen (2024). Decoding female mimicry in a fish using deep learning.
  • Halvorsen, Kim Aleksander Tallaksen; Sørdalen, Tonje Knutsen (2024). Arven etter Dannevig: Autonom kystovervåkning.
  • Allken, Vaneeda; Sørdalen, Tonje Knutsen; Beyan, Cigdem; Malde, Ketil; Browman, Howard; Halvorsen, Kim Aleksander Tallaksen (2022). A deep learning approach for individual re-identification (re-ID) of fish in the wild.

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Last changed: 7.02.2023 12:02