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Irja Ida Ratikainen

Irja Ida Ratikainen

Researcher / Associate. Prof.
Department of Biology
Faculty of Natural Sciences

irja.i.ratikainen@ntnu.no
+4747344606 Realfagbygget, D1-204, Gløshaugen, Høgskoleringen 5
Google Scholar My self-maintained website Research group
About Publications Teaching

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.

Competencies

  • Behavioural ecology
  • Evolutionary biology
  • Evolutionary ecology
  • Life-history evolution
  • Zoology and botany

Publications

  • Chronological
  • By category
  • See all publications in Cristin

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

Teaching

Courses

  • BI3081 - Scientific Seminars
  • BI2081 - Nature, Environment and Sustainability
  • RFEL3080 - Scientific Research Seminar in Natural Resource Management
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