Irja Ida Ratikainen

About

About me

I am a researcher at the Centre for Biodiversity Dynamics (CBD). 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.

I am listed among NTNUs expert lists for journalists, and I am happy to answer questions from journalists or others.

Teaching

I am responsible for the course Nature, Environment and Sustainability (BI2081) If you have any questions regarding this course you are welcome to send me an email.

Publications

2017

Haaland, Thomas; Wright, Jonathan; Kuijper, Bram; Ratikainen, Irja Ida. (2017) Differential allocation revisited: When should mate quality affect parental investment?. The American Naturalist. volum 190 (4).
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. volum 67 (11).
Academic article
Ratikainen, Irja Ida; Wright, Jonathan. (2013) Adaptive management of body mass by Siberian jays. Animal Behaviour. volum 85 (2).
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. volum 83 (5).
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. volum 86 (3).
Academic article

2010

Ratikainen, Irja Ida; Kokko, Hanna. (2010) Differential allocation and compensation: who deserves the silver spoon?. Behavioral Ecology. volum 21 (1).
Editorial
Ratikainen, Irja Ida; Wright, Jonathan; Kazem, Anahita N.J.. (2010) Social class influences degree of variance sensitivity in wild Siberian jays. Behavioral Ecology. volum 21 (5).
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. volum 11.
Scientific translation/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. volum 273.
Academic article

Scientific articles

Haaland, Thomas; Wright, Jonathan; Kuijper, Bram; Ratikainen, Irja Ida. (2017) Differential allocation revisited: When should mate quality affect parental investment?. The American Naturalist. volum 190 (4).
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. volum 67 (11).
Academic article
Ratikainen, Irja Ida; Wright, Jonathan. (2013) Adaptive management of body mass by Siberian jays. Animal Behaviour. volum 85 (2).
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. volum 83 (5).
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. volum 86 (3).
Academic article
Ratikainen, Irja Ida; Wright, Jonathan; Kazem, Anahita N.J.. (2010) Social class influences degree of variance sensitivity in wild Siberian jays. Behavioral Ecology. volum 21 (5).
Academic article
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. volum 273.
Academic article

Journal publications

Ratikainen, Irja Ida; Kokko, Hanna. (2010) Differential allocation and compensation: who deserves the silver spoon?. Behavioral Ecology. volum 21 (1).
Editorial
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. volum 11.
Scientific translation/review

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