Theoretical Ecology Group

Institutt for biologi
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Group Leader, Professor, PhD
Øyvind Fiksen


Jump to: Peer-reviewed Articles, Books, Book Chapters, Proceedings and Theses, or Popular Writings.

Peer-Reviewed Articles
Kvile KØ, Fiksen Ø, Prokopchuk I, Opdal AF. 2017.
Coupling survey data with drift model results suggests that local spawning is important for Calanus finmarchicus production in the Barents Sea
Journal of Marine Systems. 165: 69-76. [ doi:10.1016/j.jmarsys.2016.09.010 ] [ pdf ]
Lindemann C, Fiksen Ø, Andersen KH, Aksnes DL. 2016.
Scaling laws in phytoplankton nutrient uptake affinity
Frontiers in Marine Science. 3: 26. [ doi:10.3389/fmars.2016.00026 ] [ open access ] [ pdf ]
Andersen KH, Aksnes DL, Berge T, Fiksen Ø, Visser A. 2015.
Modelling emergent trophic strategies in plankton
Journal of Plankton Research. 37: 862-868. [ doi:10.1093/plankt/fbv054 ] [ pdf ]
Fiksen Ø, Opdal AF. 2015.
Optimality and rule-based models for larval fish behavior
Vie et Milieu. 65: 115-120. [ open access ] [ pdf ]
Fouzai N, Opdal AF, Jørgensen C, Fiksen Ø. 2015.
Effects of temperature and food availability on larval cod survival: a model for behaviour in vertical gradients
Marine Ecology-Progress Series. 529: 199-212. [ doi:10.3354/meps11326 ] [ open access ]
Reglero P, Blanco E, Ortega A, Fiksen Ø, Gándara F, Seoka M, Viguri FJ, Folkvord A. 2015.
Prey selectivity in piscivorous bluefin tuna larvae reared in the laboratory
Journal of Plankton Research. 37: 2-5. [ doi:10.1093/plankt/fbu082 ] [ pdf ]
Sainmont J, Andersen KH, Thygesen UH, Fiksen Ø, Visser AW. 2015.
An effective algorithm for approximating adaptive behavior in seasonal environments
Ecological Modelling. 311: 20-30. [ pdf ]
Sundelöf A, Grimm V, Ulmestrand M, Fiksen Ø. 2015.
Modelling harvesting strategies for the lobster fishery in northern Europe: the importance of protecting egg-bearing females
Population Ecology. 57: 237-251. [ doi:10.1007/s10144-014-0460-3 ] [ pdf ]
van Deurs M, Jørgensen C, Fiksen Ø. 2015.
Effects of copepod size on fish growth: a model based on data for North Sea sandeel
Marine Ecology-Progress Series. 520: 235-243. [ doi:10.3354/meps11092 ] [ open access ] [ pdf ]
Giske J, Eliassen S, Fiksen Ø, Jakobsen PJ, Aksnes DL, Mangel M, Jørgensen C. 2014.
The emotion system promotes diversity and evolvability
Proceedings of the Royal Society B. 281: 20141096. [ doi:10.1098/rspb.2014.1096 ] [ open access ] [ pdf ] [ online appendix ] [ fortran code for model at ]
Jørgensen C, Opdal AF, Fiksen Ø. 2014.
Can behavioural ecology unite hypotheses for fish recruitment?
ICES Journal of Marine Science. 71: 909-917. [ doi:10.1093/icesjms/fst083 ] [ open access ] [ pdf ]
Johnsen IA, Fiksen Ø, Sandvik AD, Asplin L. 2014.
Vertical salmon lice behavior as a response to environmental conditions and its influence on the regional dispersion in a fjord system
Aquaculture Environment Interactions. 5: 127-141. [ doi:10.3354/aei00098 ] [ open access ] [ pdf ]
Pécseli H, Trulsen JK, Fiksen Ø. 2014.
Predator-prey encounter and capture rates in turbulent environments
Limnology and Oceanography: Fluids and Environments. 4: 85-105. [ doi:10.1215/21573689-2768717 ] [ pdf ]
Reglero P, Ortega A, Blanco E, Fiksen Ø, Viguri FJ, de la Gándara F, Seoka M, Folkvord A. 2014.
Size-related differences in growth and survival in piscivorous fish larvae fed different prey types
Aquaculture. 433: 94-101. [ doi:10.1016/j.aquaculture.2014.05.050 ]
Castellani M, Rosland R, Urtizberea A, Fiksen Ø. 2013.
A mass-balanced pelagic ecosystem model with size-structured behaviourally adaptive zooplankton and fish
Ecological Modelling. 251: 54-63. [ doi:10.1016/j.ecolmodel.2012.12.007 ] [ pdf ]
Fiksen Ø, Follows MJ, Aksnes DL. 2013.
Trait-based models of nutrient uptake in microbes extend the Michaelis-Menten framework
Reviews in Limnology and Oceanography. 58: 193-202. [ doi:10.4319/lo.2013.58.1.0193 ] [ pdf ]
Giske J, Eliassen S, Fiksen Ø, Jakobsen PJ, Aksnes DL, Jørgensen C, Mangel M. 2013.
Effects of the emotion system on adaptive behavior
American Naturalist. 182: 689-703. [ doi:10.1086/673533 ] [ open access ] [ pdf ] [ online appendix ] [ popularized version ]
Urtizberea A, Fiksen Ø. 2013.
Effects of prey size structure and turbulence on feeding and growth of anchovy larvae
Environmental Biology of Fishes. 96: 1045-1063. [ doi:10.1007/s10641-012-0102-6 ] [ pdf ]
Visser AW, Fiksen Ø. 2013.
Optimal foraging in marine ecosystem models: selectivity, profitability and switching
Marine Ecology-Progress Series. 473: 91-101. [ doi:10.3354/meps10079 ] [ pdf ]
Vollset KW, Catalan IA, Fiksen Ø, Folkvord A. 2013.
The effect of food deprivation on the distribution of larval and early juvenile cod in experimental vertical temperature and light gradients
Marine Ecology-Progress Series. 475: 191-201. [ doi:10.3354/meps10129 ] [ pdf ]
Pécseli HL, Trulsen J, Fiksen Ø. 2012.
Predator-prey encounter and capture rates for plankton in turbulent environments
Progress in Oceanography. 101: 14-32.
Fiksen Ø, Jørgensen C. 2011.
Model of optimal behaviour in fish larvae predicts that food availability determines survival, but not growth
Marine Ecology-Progress Series. 432: 207-219. [ doi:10.3354/meps09148 ] [ open access ] [ pdf ]
Myrseth J, Enberg K, Heino M, Fiksen Ø. 2011.
Do accurate stock estimates increase harvest and reduce variability in fisheries yield?
Natural Resource Modelling. 24: 222-241. [ pdf ]
Opdal AF, Vikebø FB, Fiksen Ø. 2011.
Parental migration, climate and thermal exposure of larvae: spawning in southern regions gives Northeast Arctic cod a warm start
Marine Ecology-Progress Series. 439: 255-262. [ doi:10.3354/meps09335 ] [ open access ] [ pdf ]
Reglero P, Urtizberea A, Pérez A, Alemany F, Fiksen Ø. 2011.
Cannibalism among size classes of larvae may be a substantial mortality component in tuna
Marine Ecology-Progress Series. 433: 205-219. [ doi:10.3354/meps09187 ] [ pdf ]
Huse G, Fiksen Ø. 2010.
Modelling encounter rates and distribution of mobile predators and prey
Progress in Oceanography. 84: 93-104. [ doi:10.1016/j.pocean.2009.09.011 ] [ pdf ]
Jørgensen C, Fiksen Ø. 2010.
Modelling fishing-induced adaptations and consequences for natural mortality
Canadian Journal of Fisheries and Aquatic Sciences. 67: 1086-1097. [ doi:10.1139/F10-049 ] [ open access ] [ pdf ] [ online appendix ]
Pécseli HL, Trulsen J, Fiksen Ø. 2010.
Moving in turbulent waters: an analytical model and a numerical test
Progress in Oceanography. 85: 171-179.
Varpe Ø, Fiksen Ø. 2010.
Seasonal plankton-fish interactions: light regime, prey phenology, and herring foraging
Ecology. 91: 311-318. [ doi:10.1890/08-1817.1 ] [ pdf ]
Aksnes DL, Dupont N, Staby A, Fiksen Ø, Kaartvedt S, Aure J. 2009.
Coastal water darkening and implications for mesopelagic regime shifts in Norwegian fjords
Marine Ecology-Progress Series. 387: 39-49. [ open access ]
Folkvord A, Fiksen Ø, Høie H, Johannessen A, Otterlei E, Vollset KW. 2009.
What can size distributions within cohorts tell us about ecological processes in fish larvae?
Scientia Marina. 73 S1: 119-130. [ doi:10.3989/scimar.2009.73s1119 ] [ pdf ]
Jørgensen C, Ernande B, Fiksen Ø. 2009.
Size-selective fishing gear and life history evolution in the Northeast Arctic cod
Evolutionary Applications. 2: 356-370. [ doi:10.1111/j.1752-4571.2009.00075.x ] [ pdf ]
Kristiansen T, Jørgensen C, Lough RG, Vikebø F, Fiksen Ø. 2009.
Modeling rule-based behavior: habitat selection and the growth-survival trade-off in larval cod
Behavioral Ecology. 20: 490-500. [ doi:10.1093/beheco/arp023 ] [ pdf ]
Kristiansen T, Vikebø F, Sundby S, Huse G, Fiksen Ø. 2009.
Modeling growth of larval cod (Gadus morhua) in large-scale seasonal and latitudinal environmental gradients
Deep Sea Research II. 56: 2001-2011. [ pdf ]
Varpe Ø, Jørgensen C, Tarling GA, Fiksen Ø. 2009.
The adaptive value of energy storage and capital breeding in seasonal environments
Oikos. 118: 363-370. [ doi:10.1111/j.1600-0706.2008.17036.x ] [ pdf ]
Vollset KW, Fiksen Ø, Folkvord A. 2009.
Vertical distribution of larval cod (Gadus morhua) in experimental temperature gradients
Journal of Marine Biology and Ecology. 379: 16-22. [ pdf ]
Vollset KW, Seljeset O, Fiksen Ø, Folkvord A. 2009.
A common garden experiment of larval Northeast Arctic and Norwegian coastal cod cohorts in replicated mesocosms
Deep Sea Research II. 56: 1984-1991. [ pdf ]
Jørgensen C, Dunlop ES, Opdal AF, Fiksen Ø. 2008.
The evolution of spawning migrations: state dependence and fishing-induced changes
Ecology. 89: 3436-3448. [ doi:10.1890/07-1469.1 ] [ pdf ]
Opdal AF, Godø OR, Bergstad OA, Fiksen Ø. 2008.
Distribution, identity, and possible processes sustaining meso- and bathypelagic scattering layers on the northern Mid-Atlantic Ridge
Deep Sea Research II. 55: 45-58. [ pdf ]
Opdal AF, Vikebø F, Fiksen Ø. 2008.
Relationships between spawning ground identity, latitude and early life thermal exposure in Northeast Arctic cod
Journal of Northwest Atlantic Fishery Science. 41: 13-22. [ doi:10.2960/J.v41.m621 ] [ pdf ]
Sattar SA, Jørgensen C, Fiksen Ø. 2008.
Fisheries-induced evolution of energy and sex allocation
Bulletin of Marine Science. 83: 235-250. [ pdf ]
Urtizberea A, Fiksen Ø, Folkvord A, Irigoien X. 2008.
Modelling growth of larval anchovies including diel feeding patterns, temperature and body size
Journal of Plankton Research. 30: 1369-1383. [ doi:10.1093/plankt/fbn090 ]
Fiksen Ø, Jørgensen C, Kristiansen T, Vikebø F, Huse G. 2007.
Linking behavioural ecology and oceanography: larval behaviour determines growth, mortality and dispersal
Marine Ecology-Progress Series. 347: 195-205. [ doi:10.3354/meps06978 ] [ open access ] [ pdf ]
Irigoien X, Fiksen Ø, Cotano U, Uriarte A, Alvarez P, Arrizabalaga H, Boyra G, Santos M, Sagarminaga Y, Otheguy P, Etxebeste E, Zarauz L, Artetxe I, Motos L. 2007.
Could Biscay Bay Anchovy recruit through a spatial loophole?
Progress in Oceanography. 74: 132-148. [ pdf ]
Kristiansen T, Fiksen Ø, Folkvord A. 2007.
Modelling feeding, growth, and habitat selection in larval Atlantic cod (Gadus morhua): observations and model predictions in a macrocosm environment
Canadian Journal of Fisheries and Aquatic Sciences. 64: 136-151. [ pdf ]
Tian T, Fiksen Ø, Folkvord A. 2007.
Estimating larval fish growth under size-dependent mortality: a numerical analysis of bias
Canadian Journal of Fisheries and Aquatic Sciences. 64: 554-562. [ pdf ]
Titelman J, Varpe Ø, Eliassen S, Fiksen Ø. 2007.
Copepod mating: chance or choice?
Journal of Plankton Research. 29: 1023-1030. [ pdf ]
Varpe Ø, Jørgensen C, Tarling GA, Fiksen Ø. 2007.
Early is better: seasonal egg fitness and timing of reproduction in a zooplankton life-history model
Oikos. 116: 1331-1342. [ doi:10.1111/j.2007.0030-1299.15893.x ] [ open access ] [ pdf ]
Vikebø F, Jørgensen C, Kristiansen T, Fiksen Ø. 2007.
Drift, growth and survival of larval Northeast Arctic cod with simple rules of behaviour
Marine Ecology-Progress Series. 347: 207-219 . [ doi:10.3354/meps06979 ] [ open access ] [ pdf ]
Jørgensen C, Ernande B, Fiksen Ø, Dieckmann U. 2006.
The logic of skipped spawning in fish
Canadian Journal of Fisheries and Aquatic Sciences. 63: 200-211. [ doi:10.1139/F05-210 ] [ pdf ]
Jørgensen C, Fiksen Ø. 2006.
State-dependent energy allocation in cod (Gadus morhua)
Canadian Journal of Fisheries and Aquatic Sciences. 63: 186-199. [ doi:10.1139/f05-209 ] [ pdf ]
Fiksen Ø, Eliassen S, Titelman J. 2005.
Multiple predators in the pelagic: modelling behavioural cascades
Journal of Animal Ecology. 74: 423-429. [ pdf ]
Kaartvedt S, Rostad A, Fiksen Ø, Melle W, Torgersen T, Breien MT, Klevjer TA. 2005.
Piscivorous fish patrol krill swarms
Marine Ecology-Progress Series. 299: 1-5. [ pdf ]
Mazaris AD, Fiksen Ø, Matsinos YG. 2005.
Using an individual-based model for assessment of sea turtle population viability
Population Ecology. 47: 179-191. [ pdf ]
Varpe Ø, Fiksen Ø, Slotte A. 2005.
Meta-ecosystems and biological energy transport from ocean to coast: the ecological importance of herring migration
Oecologia. 146: 443-451. [ pdf ]
Vikebø F, Sundby S, Ådlandsvik B, Fiksen Ø. 2005.
The combined effect of transport and temperature on distribution and growth of larvae and pelagic juveniles of Arcto-Norwegian cod
Ices Journal of Marine Science. 62: 1375-1386. [ pdf ]
Fiksen Ø, Varpe Ø, Kaartvedt S. 2004.
Reply to Horizons Article 'Some ideas about the role of lipids in the life cycle of Calanus finmarchicus' Irigoien (2004): II
Journal of Plankton Research. 26: 981-981. [ pdf ]
Titelman J, Fiksen Ø. 2004.
Ontogenetic vertical distribution patterns in small copepods: field observations and model predictions
Marine Ecology-Progress Series. 284: 49-63. [ pdf ]
Grønstøl GB, Byrkjedal I, Fiksen Ø. 2003.
Predicting polygynous settlement while incorporating varying female competitive strength
Behavioral Ecology. 14: 257-267. [ pdf ]
Fiksen Ø, Aksnes DL, Flyum MH, Giske J. 2002.
The influence of turbidity on growth and survival of fish larvae: a numerical analysis
Hydrobiologia. 484: 49-59. [ pdf ]
Fiksen Ø, Mackenzie BR. 2002.
Process-based models of feeding and prey selection in larval fish
Marine Ecology-Progress Series. 243: 151-164. [ pdf ]
Fiksen Ø, Slotte A. 2002.
Stock-environment recruitment models for Norwegian spring spawning herring (Clupea harengus)
Canadian Journal of Fisheries and Aquatic Sciences. 59: 211-217. [ pdf ]
Fiksen Ø. 2000.
The adaptive timing of diapause - a search for evolutionarily robust strategies in Calanus finmarchicus
ICES Journal of Marine Science. 57: 1825-1833. [ pdf ]
Kirby DS, Fiksen Ø, Hart PJB. 2000.
A dynamic optimisation model for the behaviour of tunas at ocean fronts
Fisheries Oceanography. 9: 328-342. [ pdf ]
Slotte A, Fiksen Ø. 2000.
State-dependent spawning migration in Norwegian spring-spawning herring
Journal of Fish Biology. 56: 138-162. [ pdf ]
Fiksen Ø, Folkvord A. 1999.
Modelling growth and ingestion processes in herring Clupea harengus larvae
Marine Ecology-Progress Series. 184: 273-289. [ pdf ]
Fiksen Ø, Carlotti F. 1998.
A model of optimal life history and diel vertical migration in Calanus finmarchicus
Sarsia. 83: 129-147. [ pdf ]
Fiksen Ø, Utne ACW, Aksnes DL, Eiane K, Helvik JV, Sundby S. 1998.
Modelling the influence of light, turbulence and ontogeny on ingestion rates in larval cod and herring
Fisheries Oceanography. 7: 355-363. [ pdf ]
Giske J, Huse G, Fiksen Ø. 1998.
Modelling spatial dynamics of fish
Reviews in Fish Biology and Fisheries. 8: 57-91. [ pdf ]
Fiksen Ø. 1997.
Allocation patterns and diel vertical migration: Modeling the optimal Daphnia
Ecology. 78: 1446-1456. [ pdf ]
Giske J, Rosland R, Berntsen J, Fiksen Ø. 1997.
Ideal free distribution of copepods under predation risk
Ecological Modelling. 95: 45-59. [ pdf ]
Fiksen Ø, Giske J. 1995.
Vertical distribution and population dynamics of copepods by dynamic optimization
Ices Journal of Marine Science. 52: 483-503. [ pdf ]
Fiksen Ø, Giske J, Slagstad D. 1995.
A spatially explicit fitness based model of capelin migrations in the Barents Sea
Fisheries Oceanography. 4: 193-208. [ pdf ]
Giske J, Aksnes DL, Fiksen Ø. 1994.
Visual predators, environmental variables and zooplankton mortality risk
Vie et Milieu. 44: 1-9. [ pdf ]
Book Chapters
deYoung B, Werner FE, Batchelder H, Carlotti F, Fiksen Ø, Hofmann EE, Kim S, Kishi MJ, Yamazaki H. 2010.
Dynamics of marine ecosystems: physical-biological interactions
Pages 89-128 in Marine Ecosystems and Global Change, edited by Barange M, Field JG, Harris RP, Hofmann EE, Perry RI, Werner FE. New York: Oxford University Press.
Miller T, Fiksen Ø, Gallego A. 2009.
Pages 25-27 in Manual of recommended best practices for modelling physical-biological interactions during fish early life , edited by North EW, Gallego A, Petitgas P. Copenhagen, DK.: ICES Cooperative Research Report vol. 295. [ open access ]
Mangel M, Fiksen Ø, Giske J. 2001.
Theoretical and statistical models in natural resource management and research
Pages 57-72 in Modeling in natural resource management. Development, interpretation and application, edited by Shenk TM, Franklin AB. Washington, DC: Island Press. [ pdf ]
Conference Proceedings, Theses, Reports
Andersen HL, Fiksen Ø, Kirkendall L, Stefansson S. 2017.
Collegial evaluation of writing as a learning activity in a bachelor programme
Nordic Journal of STEM Education. 1: 20-24. [ open access ] [ pdf ]
Andersson R, Eidesen PB, Fiksen Ø, Førland O, Stefansson S, Vandvik V. 2017.
Korleis få professorar med på ein kollegial SoTL-kultur?
Nordic Journal of STEM Education. 1: 15-19. [ open access ] [ pdf ]
Opdal AF, Aksnes DL, Rosland R, Fiksen Ø. 2013.
Sognefjorden ? en oppsummering av litteratur og kunnskapsstatus om fjord-økologi og vannkraftutbygging
Uni Computing Technical Report Series. 32. [ pdf ]
Dutkiewicz S, Follows M, Fiksen Ø, Kiørboe T. 2012.
Trait-based ecosystem models
International Innovation. 2012 June: 120-122. [ pdf ]
Jørgensen C, Fiksen Ø, Ernande B. 2006.
Effects of different management regimes on harvest-induced life history evolution in Northeast Arctic cod
ICES CM. H: 13. [ open access ] [ pdf ]
Sattar SA, Jørgensen C, Fiksen Ø. 2006.
Effects of fisheries on energy- and sex-allocation in slow-growing hermaphrodites such as groupers
ICES CM. H: 12. [ open access ] [ pdf ]
Jørgensen C, Ernande B, Fiksen Ø, Dieckmann U. 2004.
Skipped spawning is common for the Northeast Arctic cod in a life-history energy allocation model
ICES CM. 2004/K:28. [ open access ] [ pdf ]
Housholder DJ, Heino M, Fiksen Ø. 2003.
Evaluation of harvest control rules: simple one-parameter vs. complex multi-parameter strategies
ICES CM 2003. X: 01. [ pdf ]
Fiksen Ø, McKenzie BR. 2001.
Optimal state-dependent allocation to growth or reproduction in cod
ICES CM 2001. V: 12. [ pdf ]
Fiksen Ø, Slotte A. 2000.
Recruitment variability in Norwegian spring-spawning herring (Clupea harengus L.): the effect of temperature in larval drift trajectories
ICES CM 2000. N: 08. [ pdf ]
Popular Science Writing
Jørgensen C, Fiksen Ø. 2006.
Fra kjempetorsk på Møre til dverger langs Finnmarkskysten? [In Norwegian]
Cicerone. 15: 32-33. [ pdf ]
Vikebø F, Fiksen Ø. 2006.
Torskens tilpasning til klima og havstrømmer
Cicerone. 15: 34-35. [ pdf ]
Varpe Ø, Fiksen Ø. 2005.
Zooplankton-fish interactions and the fat conveyor-belt in the Norwegian Sea
GLOBEC Newsletter. October 2005: 4-6. [ pdf ]
Huse G, Fiksen Ø. 2001.
Models, global change and adaptive behaviour
GLOBEC Newsletter. April 2001: 30-31. [ pdf ]


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