Irja Ida Ratikainen
+4747344606
Realfagbygget, D1-204, Gløshaugen, Høgskoleringen 5
About
About me
I am a researcher at the department of biology. I have a wide field of interest within behavioural and evolutionary ecology.
I work both empirically and theoretically to answer questions about how organisms adapt to variable and unpredictable environments. When we improve our understanding of how animals and plants adapt to variable environments we will also be better able to predict how they will cope with a changing environment in the future.
Publications
2025
-
Sekajova, Zuzana;
Fossen, Erlend Ignacio Fleck;
Rosa, Elena;
Ratikainen, Irja Ida;
Tourniaire-blum, Manon;
Lind, Martin.
(2025)
Evolution of phenotypic plasticity during environmental fluctuations.
Journal of Evolutionary Biology
Academic article
2024
-
Reitan, Berit;
Ratikainen, Irja Ida;
Bungum, Berit.
(2024)
Bruk av årshjul som modell for å utforske dyrs tilpasninger til klimaendringer.
Naturfag
Popular scientific article
-
Hjermann, Tilde Katrina Slotte;
Herfindal, Ivar;
Ratikainen, Irja Ida;
Strand, Olav;
Rauset, Geir Rune.
(2024)
Individual and temporal variation in movement patterns of wild alpine reindeer and implications for disease management.
Ecography
Academic article
2023
-
Sekajova, Zuzana;
Fossen, Erlend Ignacio Fleck;
Rosa, Elena;
Ratikainen, Irja Ida;
Tourniaire-blum, Manon;
Bolund, Elisabeth.
(2023)
Evolution during uncorrelated environmental fluctuations: bet-hedging or phenotypic plasticity?.
bioRxiv
Academic article
-
Auge, Gabriela;
Hankofer, Valentin;
Groth, Martin;
Antoniou-Kourounioti, Rea;
Ratikainen, Irja Ida;
Lampei, Christian.
(2023)
Plant environmental memory: implications, mechanisms and opportunities for plant scientists and beyond.
AoB Plants
Academic literature review
-
Fjelldal, Mari Aas;
Muller, Amandine Sophie;
Ratikainen, Irja Ida;
Stawski, Clare ;
Wright, Jonathan.
(2023)
The small-bat-in-summer paradigm: Energetics and adaptive behavioural routines of bats investigated through a stochastic dynamic model.
Journal of Animal Ecology
Academic article
2022
-
Burton, Tim;
Ratikainen, Irja Ida;
Einum, Sigurd.
(2022)
Environmental change and the rate of phenotypic plasticity.
Global Change Biology
Academic article
2021
-
Hjermann, Tilde;
Ratikainen, Irja Ida;
Herfindal, Ivar;
Rauset, Geir Rune.
(2021)
Sex-specific space use patterns in wild alpine reindeer: Potential consequences for disease transmission.
Norges Teknisk-Naturvitenskapelige Universitet
Masters thesis
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2021)
Individual reversible plasticity as a genotype-level bet-hedging strategy.
Journal of Evolutionary Biology
Academic article
2020
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2020)
Generalists versus specialists in fluctuating environments: a bet-hedging perspective.
Oikos
Academic article
2019
-
Ratikainen, Irja Ida;
Kokko, Hanna.
(2019)
The coevolution of lifespan and reversible plasticity.
Nature Communications
Academic article
-
Einum, Sigurd;
Ratikainen, Irja Ida;
Wright, Jonathan;
Pelabon, Christophe;
Bech, Claus;
Jutfelt, Fredrik.
(2019)
How to quantify thermal acclimation capacity?.
Global Change Biology
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Tufto, Jarle;
Ratikainen, Irja Ida.
(2019)
Short‐term insurance versus long‐term bet‐hedging strategies as adaptations to variable environments.
Evolution
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2019)
Bet-hedging across generations can affect the evolution of variance-sensitive strategies within generations.
Proceedings of the Royal Society of London. Biological Sciences
Academic article
2018
-
Ratikainen, Irja Ida;
Haaland, Thomas;
Wright, Jonathan.
(2018)
Differential allocation of parental investment and the trade-off between size and number of offspring.
Proceedings of the Royal Society of London. Biological Sciences
Academic article
-
Govaert, Lynn;
Fronhofer, Emanuel A.;
Lion, Sébastien;
Eizaguirre, Christophe;
Bonte, Dries;
Egas, Martijn.
(2018)
Eco-evolutionary feedbacks - theoretical models and perspectives.
Functional Ecology
Academic article
-
Stokke, Bård Gunnar;
Ratikainen, Irja Ida;
Moksnes, Arne;
Røskaft, Eivin;
Schulze-Hagen, Karl;
Leech, David I..
(2018)
Characteristics determining host suitability for a generalist parasite.
Scientific Reports
Academic article
2017
-
Haaland, Thomas;
Wright, Jonathan;
Kuijper, Bram;
Ratikainen, Irja Ida.
(2017)
Differential allocation revisited: When should mate quality affect parental investment?.
The American Naturalist
Academic article
2013
-
Aronsen, Tonje;
Berglund, Anders;
Mobley, Kenyon;
Ratikainen, Irja Ida;
Rosenqvist, Gunilla.
(2013)
Sex ratio and density affect sexual seleciton in a sex-role reversed fish.
Evolution
Academic article
-
Ratikainen, Irja Ida;
Wright, Jonathan.
(2013)
Adaptive management of body mass by Siberian jays.
Animal Behaviour
Academic article
2012
-
Ratikainen, Irja Ida;
Sødal, Liv Randi Henøen;
Kazem, Anahita J.N.;
Wright, Jonathan.
(2012)
Private and public information use strategies by foraging groups of wild Siberian jays.
Animal Behaviour
Academic article
2011
-
Delgado, Maria Del Mar;
Ratikainen, Irja Ida;
Kokko, Hanna.
(2011)
Inertia: the discrepancy between individual and common good in dispersal and prospecting behaviour.
Biological Reviews
Academic article
2010
-
Ratikainen, Irja Ida;
Kokko, Hanna.
(2010)
Differential allocation and compensation: who deserves the silver spoon?.
Behavioral Ecology
Editorial
-
Delgado, Maria Del Mar;
Ratikainen, Irja Ida;
Kokko, Hanna.
(2010)
Inertia: the discrepancy between individual and common good in dispersal and prospecting behaviour.
Biological Reviews
Academic literature review
-
Ratikainen, Irja Ida;
Wright, Jonathan;
Kazem, Anahita N.J..
(2010)
Social class influences degree of variance sensitivity in wild Siberian jays.
Behavioral Ecology
Academic article
2008
-
Ratikainen, Irja Ida;
Gill, Jennifer A.;
Gunnarsson, Tómas G.;
Sutherland, W.J.;
Kokko, Hanna.
(2008)
When density dependence is not instantaneous: theoretical developments and management implications.
Ecology Letters
Academic literature review
2007
-
Ratikainen, Irja Ida;
Panzacchi, Manuela;
Mysterud, Atle;
Odden, John;
Linnell, John D.C.;
Andersen, Reidar.
(2007)
Use of winter habitat by roe deer at a northern latitude where Eurasian lynx are present.
Journal of Zoology
Academic article
Journal publications
-
Sekajova, Zuzana;
Fossen, Erlend Ignacio Fleck;
Rosa, Elena;
Ratikainen, Irja Ida;
Tourniaire-blum, Manon;
Lind, Martin.
(2025)
Evolution of phenotypic plasticity during environmental fluctuations.
Journal of Evolutionary Biology
Academic article
-
Reitan, Berit;
Ratikainen, Irja Ida;
Bungum, Berit.
(2024)
Bruk av årshjul som modell for å utforske dyrs tilpasninger til klimaendringer.
Naturfag
Popular scientific article
-
Hjermann, Tilde Katrina Slotte;
Herfindal, Ivar;
Ratikainen, Irja Ida;
Strand, Olav;
Rauset, Geir Rune.
(2024)
Individual and temporal variation in movement patterns of wild alpine reindeer and implications for disease management.
Ecography
Academic article
-
Sekajova, Zuzana;
Fossen, Erlend Ignacio Fleck;
Rosa, Elena;
Ratikainen, Irja Ida;
Tourniaire-blum, Manon;
Bolund, Elisabeth.
(2023)
Evolution during uncorrelated environmental fluctuations: bet-hedging or phenotypic plasticity?.
bioRxiv
Academic article
-
Auge, Gabriela;
Hankofer, Valentin;
Groth, Martin;
Antoniou-Kourounioti, Rea;
Ratikainen, Irja Ida;
Lampei, Christian.
(2023)
Plant environmental memory: implications, mechanisms and opportunities for plant scientists and beyond.
AoB Plants
Academic literature review
-
Fjelldal, Mari Aas;
Muller, Amandine Sophie;
Ratikainen, Irja Ida;
Stawski, Clare ;
Wright, Jonathan.
(2023)
The small-bat-in-summer paradigm: Energetics and adaptive behavioural routines of bats investigated through a stochastic dynamic model.
Journal of Animal Ecology
Academic article
-
Burton, Tim;
Ratikainen, Irja Ida;
Einum, Sigurd.
(2022)
Environmental change and the rate of phenotypic plasticity.
Global Change Biology
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2021)
Individual reversible plasticity as a genotype-level bet-hedging strategy.
Journal of Evolutionary Biology
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2020)
Generalists versus specialists in fluctuating environments: a bet-hedging perspective.
Oikos
Academic article
-
Ratikainen, Irja Ida;
Kokko, Hanna.
(2019)
The coevolution of lifespan and reversible plasticity.
Nature Communications
Academic article
-
Einum, Sigurd;
Ratikainen, Irja Ida;
Wright, Jonathan;
Pelabon, Christophe;
Bech, Claus;
Jutfelt, Fredrik.
(2019)
How to quantify thermal acclimation capacity?.
Global Change Biology
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Tufto, Jarle;
Ratikainen, Irja Ida.
(2019)
Short‐term insurance versus long‐term bet‐hedging strategies as adaptations to variable environments.
Evolution
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Ratikainen, Irja Ida.
(2019)
Bet-hedging across generations can affect the evolution of variance-sensitive strategies within generations.
Proceedings of the Royal Society of London. Biological Sciences
Academic article
-
Ratikainen, Irja Ida;
Haaland, Thomas;
Wright, Jonathan.
(2018)
Differential allocation of parental investment and the trade-off between size and number of offspring.
Proceedings of the Royal Society of London. Biological Sciences
Academic article
-
Govaert, Lynn;
Fronhofer, Emanuel A.;
Lion, Sébastien;
Eizaguirre, Christophe;
Bonte, Dries;
Egas, Martijn.
(2018)
Eco-evolutionary feedbacks - theoretical models and perspectives.
Functional Ecology
Academic article
-
Stokke, Bård Gunnar;
Ratikainen, Irja Ida;
Moksnes, Arne;
Røskaft, Eivin;
Schulze-Hagen, Karl;
Leech, David I..
(2018)
Characteristics determining host suitability for a generalist parasite.
Scientific Reports
Academic article
-
Haaland, Thomas;
Wright, Jonathan;
Kuijper, Bram;
Ratikainen, Irja Ida.
(2017)
Differential allocation revisited: When should mate quality affect parental investment?.
The American Naturalist
Academic article
-
Aronsen, Tonje;
Berglund, Anders;
Mobley, Kenyon;
Ratikainen, Irja Ida;
Rosenqvist, Gunilla.
(2013)
Sex ratio and density affect sexual seleciton in a sex-role reversed fish.
Evolution
Academic article
-
Ratikainen, Irja Ida;
Wright, Jonathan.
(2013)
Adaptive management of body mass by Siberian jays.
Animal Behaviour
Academic article
-
Ratikainen, Irja Ida;
Sødal, Liv Randi Henøen;
Kazem, Anahita J.N.;
Wright, Jonathan.
(2012)
Private and public information use strategies by foraging groups of wild Siberian jays.
Animal Behaviour
Academic article
-
Delgado, Maria Del Mar;
Ratikainen, Irja Ida;
Kokko, Hanna.
(2011)
Inertia: the discrepancy between individual and common good in dispersal and prospecting behaviour.
Biological Reviews
Academic article
-
Ratikainen, Irja Ida;
Kokko, Hanna.
(2010)
Differential allocation and compensation: who deserves the silver spoon?.
Behavioral Ecology
Editorial
-
Delgado, Maria Del Mar;
Ratikainen, Irja Ida;
Kokko, Hanna.
(2010)
Inertia: the discrepancy between individual and common good in dispersal and prospecting behaviour.
Biological Reviews
Academic literature review
-
Ratikainen, Irja Ida;
Wright, Jonathan;
Kazem, Anahita N.J..
(2010)
Social class influences degree of variance sensitivity in wild Siberian jays.
Behavioral Ecology
Academic article
-
Ratikainen, Irja Ida;
Gill, Jennifer A.;
Gunnarsson, Tómas G.;
Sutherland, W.J.;
Kokko, Hanna.
(2008)
When density dependence is not instantaneous: theoretical developments and management implications.
Ecology Letters
Academic literature review
-
Ratikainen, Irja Ida;
Panzacchi, Manuela;
Mysterud, Atle;
Odden, John;
Linnell, John D.C.;
Andersen, Reidar.
(2007)
Use of winter habitat by roe deer at a northern latitude where Eurasian lynx are present.
Journal of Zoology
Academic article
Report
-
Hjermann, Tilde;
Ratikainen, Irja Ida;
Herfindal, Ivar;
Rauset, Geir Rune.
(2021)
Sex-specific space use patterns in wild alpine reindeer: Potential consequences for disease transmission.
Norges Teknisk-Naturvitenskapelige Universitet
Masters thesis
Outreach
2025
-
InterviewGuttormsgaard, Hanna Enger; Ratikainen, Irja Ida. (2025) Dyr blir forvirra av klimaendringene. Norge i dag, NRK Norge i dag, NRK [TV] 2025-02-18
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InterviewAas, Vilde Aardahl; Ratikainen, Irja Ida. (2025) Vinteren blir kortere: – Dyrene forstår ikke helt hva som skjer. https://ung.forskning.no/ https://ung.forskning.no/ [Internet] 2025-01-19
2024
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LectureAlterskjær, Kari; Ratikainen, Irja Ida. (2024) Blir vinteren kortere, og hvilken betydning har det for dyrelivet?. NTNU Realfagkonferansen 2024 , Trondheim 2024-05-07 - 2024-05-07
2023
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Academic lectureHaaland, Thomas Ray; Payo-Payo, Ana; Acker, Paul; Fortuna, Rita; Burthe, Sarah J; Ratikainen, Irja Ida. (2023) Eco-evolutionary dynamics of partially migratory metapopulations. Norsk Økologisk Forening Oikos Norway 2023 , NMBU, Ås 2023-02-13 - 2023-02-15
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Academic lectureHaaland, Thomas Ray; Payo-Payo, Ana; Acker, Paul; Fortuna, Rita; Burthe, Sarah J.; Ratikainen, Irja Ida. (2023) Eco-evolutionary dynamics of partially migratory metapopulations. British Ornithological Union BOU 2023 , Nottingham, UK 2023-04-04 - 2023-04-06
2022
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PosterHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2022) Individual reversible plasticity as a genotype-level bet-hedging strategy. European Society of Evolutionary Biology ESEB 2022 , Praha 2022-08-14 - 2022-08-19
2020
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PosterGavriilidi, Ioanna Aikaterini; Ratikainen, Irja Ida; Norgaard, Trygve; Amundsen, Trond. (2020) Quality housing overruns costs of competition: a study of two-spotted gobies . Bavarian State Collection of Zoology 8th International Goby Meeting , Starnberg 2020-02-26 - 2020-02-28
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Academic lectureRatikainen, Irja Ida. (2020) The effect of environmental stochasticity on the outcome of evolution. Munster Graduate school of Evolution, University of Munster Growth of Evolutionary Thought , Munster 2020-12-07 -
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Academic lectureHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2020) Phenotypic plasticity as a bet-hedging strategy. Centre for Biodivesity Dynamics EvoDemo , Røros 2020-10-06 - 2020-10-11
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Academic lectureRatikainen, Irja Ida; Kokko, Hanna; Lind, Martin; Haaland, Thomas; Silva, Willian. (2020) Lifespan and co-evolution with other life history traits in variable environments. RESEARCH UNIT FOR2281 PhD Summer School ADABT 2020: a summer school for FOR2281 , Karlsrhue 2020-06-09 -
2019
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Popular scientific lectureRatikainen, Irja Ida. (2019) Biodiversity, climate change and migration. 2019 ISFiT Foundation ISFiT 2019 workshop , Trondheim 2019-02-06 - 2019-02-18
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Academic lectureRatikainen, Irja Ida. (2019) Partner quality effects on optimal parental investments. University of Bergen Departmental seminar , Bergen 2019-01-08 -
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PosterHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2019) Bet-hedging affects the evolution of variance-sensitive strategies. European Society for Evolutionary Biology ESEB 2019 , Turku 2019-08-19 - 2019-08-24
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Academic lectureHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2019) Bet-hedging affects the evolution of variance-sensitive strategies. Association for the Study of Animal Behaviour ASAB Summer 2019 , Konstanz 2019-08-26 - 2019-08-28
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PosterHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2019) Bet-hedging affects the evolution of variance-sensitive strategies. Modelling Ecology and Evolution in Zürich , Zürich 2019-06-24 - 2019-06-25
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Academic lectureRatikainen, Irja Ida. (2019) Co-evolution of life history traits in variable environments. ESEB conference 2019 , Turku 2019-08-19 - 2019-08-24
2018
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Academic lectureHaaland, Thomas; Wright, Jonathan; Tufto, Jarle; Ratikainen, Irja Ida. (2018) Variable environments and the evolution of bet-hedgers, generalists and specialists. Nordic Society Oikos OIKOS 2018 , Trondheim 2018-02-19 - 2018-02-22
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PosterRatikainen, Irja Ida; Kokko, Hanna. (2018) The coevolution of lifespan and reversible plasticity. Evolution 2018 2018-08-19 - 2018-08-22
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Academic lectureRatikainen, Irja Ida. (2018) Why behavioural ecology is important for evolutionary ecologists. Visit to UiB 2018-08-31 -
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PosterHaaland, Thomas; Wright, Jonathan; Tufto, Jarle; Ratikainen, Irja Ida. (2018) Variable environments and the evolution of bet-hedgers, generalists and specialists. ESEB / SSE Evolution 2018 , Montpellier 2018-08-18 - 2018-08-22
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Academic lectureBotero, Carlos A.; Haaland, Thomas; Ratikainen, Irja Ida; Wright, Jonathan. (2018) Life history determines vulnerability and capacity to adapt to more frequent and intense extreme weather events. ESEB / SSE Evolution 2018 , Montpellier 2018-08-18 - 2018-08-22
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Academic lectureRatikainen, Irja Ida. (2018) Models of parental investment when mate quality varies. Interplay between sexual selection and parental care , Kristineberg 2018-02-26 - 2018-03-03
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Academic lectureGavriilidi, Ioanna Aikaterini; Ratikainen, Irja Ida; Amundsen, Trond. (2018) Territorial behaviour and competition in the two-spotted goby (Gobiusculus flavescens). Göteborgs Universitet og Kungliga Vetenskapsakademin Workshop "Interplay Between Parental Care and Sexual Selection" , Fiskebäckskil (SLC Kristineberg) 2018-02-26 - 2018-03-03
2017
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InterviewRatikainen, Irja Ida. (2017) Vår oppmerksomhet påvirker hunders ansiktsuttrykk. www.abcnyheter.no www.abcnyheter.no [Internet] 2017-10-29
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PosterRatikainen, Irja Ida; Wright, Jonathan; Tufto, Jarle; Botero, Carlos A.. (2017) A simulation model of the evolution of transgenerational plasticity in fluctuating environments. ESEB 2017 , Groningen 2017-08-20 - 2017-08-25
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Academic lectureRatikainen, Irja Ida; Haaland, Thomas; Wright, Jonathan. (2017) Partner quality effects on optimal parental investment. Departmental seminar 2017-05-11 -
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Academic lectureHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2017) Social decision making in a fluctuating world: A simulation model of a Producer-Scrounger foraging game. Norsk Økologisk Forening NØF 2017 , Oslo 2017-01-11 - 2017-01-13
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Academic lectureHaaland, Thomas; Wright, Jonathan; Tufto, Jarle; Botero, Carlos A.; Ratikainen, Irja Ida. (2017) Adaptations to uncertainty: Asymmetric fitness functions and fluctuating environments. European Society for Evolutionary Biology ESEB 2017 , Groningen 2017-08-20 - 2017-08-25
2016
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Academic lectureHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2016) A General Stochastic Dynamic Model of the Differential Allocation Hypothesis. ISBE - International Society for Behavioral Ecology ISBE2016 , University of Exeter 2016-07-28 - 2016-08-03
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Academic lectureHaaland, Thomas; Wright, Jonathan; Ratikainen, Irja Ida. (2016) Differential Allocation - A New Theoretical Framework. Uppsala Universitet EMPSEB22 - European Meeting of PhD Students in Evolutionary Biology , Gotland 2016-09-11 - 2016-09-16
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Academic lectureRatikainen, Irja Ida; Haaland, Thomas; Wright, Jonathan. (2016) Differential parental allocation to offspring size vs number. The University of Exeter ISBE 2016 , Exeter 2016-07-28 - 2016-08-03
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LectureRatikainen, Irja Ida. (2016) Hva dyrene gjør og bør gjøre når verden rundt dem er mer eller mindre uforutsigbar. Foreningen Norske Etologer fagdag i Foreningen Norske Etologer , Trondheim 2016-03-12 -
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InterviewRatikainen, Irja Ida; Grosvold, Roger. (2016) Slik kan Trofast finne veien hjem uten GPS. abc nyheter abc nyheter [Internet] 2016-05-20
2015
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Academic lectureRatikainen, Irja Ida; Haaland, Thomas Ray; Wright, Jonathan. (2015) A general stochastic dynamic model of the differential allocation hypothesis. Mathematical Models in Ecology and Evolution 2015 , Paris 2015-07-07 - 2015-07-11
2014
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Academic lectureRatikainen, Irja Ida; Wright, Jonathan. (2014) Variance sensitivity and other adaptations to variable environments. Visit to the "Modeling Animal Decisions" group 2014-10-20 - 2014-10-22
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Academic lectureRatikainen, Irja Ida; Wright, Jonathan. (2014) Adaptations to stochasticity at multiple levels. Centre for Biodiversity Dynamics CBD Workshop on 'Evolution in Stochastic Environments' , Trondheim 2014-01-13 - 2014-01-15
2012
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Academic lectureWright, Jonathan; Ratikainen, Irja Ida. (2012) Adaptive Responses to Environmental Stochasticity. Departmental Seminar , University of Bern 2012-04-25 - 2012-04-25
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Academic lectureWright, Jonathan; Ratikainen, Irja Ida. (2012) Adaptations to Environmental Stochasticity. Departmental Seminar , University of Haifa 2012-10-24 - 2012-10-24
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Academic lectureWright, Jonathan; Ratikainen, Irja Ida. (2012) Adaptive Responses to Environmental Stochasticity. ISBE 14th Congress of the International Society for Behavioral Ecology , University of Lund 2012-08-12 - 2012-08-18
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PosterRatikainen, Irja Ida; Wright, Jonathan. (2012) Adaptive Management of Individual Body Mass in Wild Groups of Siberian Jays. ISBE 14th Congress of the International Society for Behavioral Ecology , University of Lund 2012-08-12 - 2012-08-18
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Academic lectureWright, Jonathan; Ratikainen, Irja Ida. (2012) Adaptations to Environmental Stochasticity. Departmental Seminar , Department of Biology, University of Jerusalem 2012-11-06 - 2012-11-06
2010
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Academic lectureRatikainen, Irja Ida; Sødal, Liv Randi Henøen; Wright, Jonathan; Kazem, Anahita J.N.. (2010) Optimal sampling, private and public information use in foraging by wild Siberian Jays. ISBE ISBE 2010 , Perth 2010-09-26 - 2010-10-02
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PosterRatikainen, Irja Ida; Kokko, Hanna. (2010) POPULATION CONSEQUENCES OF PROSPECTING BEHAVIOUR. Centre for Conservation Biology CCB 2010 Sustainable conservation , Trondheim 2010-03-15 - 2010-03-18
2008
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Academic lectureRatikainen, Irja Ida; Wright, Jonathan; Kazem, Anahita N.J.. (2008) Social class influences variance-sensitivity in wild Siberian jays: gambling to survive vs to reproduce?. ISBE (12th congress of the International Society for Behavioral Ecology) , Cornell University 2008-08-09 - 2008-08-15
2007
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PosterRatikainen, Irja Ida; Kokko, Hanna. (2007) Possible population consequences of evolution of prospecting behaviour. ESEB (The 11th Congress of The European Society for Evolutionary Biology) 2007-08-20 - 2007-08-25
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Popular scientific lectureRatikainen, Irja Ida; Grønningsæter, Eirik. (2007) Lavskrika - Nepotisten i gammelskogen. NOF Trondheim foredrag i NOF , Suhmhust, Trondheim 2007-11-06 - 2007-11-06