Author

Raphael Ritter

University of HelsinkiORCID 0009-0000-3060-1622Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Evolutionary Biology· 2

Signature Assays, Organisms & Methods

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Approach:experimental assay· 2 Research Focus:host-pathogen & immune response· 1

Frequent Co-Authors

Carita LindstedtiD· 2 shared Heikki HelanteräiD· 2 shared Riikka Tynkkynen· 1 shared Saskia WutkeiD· 1 shared Sophie Van MeyeliD· 1 shared

Activity by Year

2026-2026 · peak 2/yr

Co-Author Collaboration Network

5 top collaborators · 8 mutual co-author links

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2 shared papersEvolutionary Biology

Carita LindstedtORCID

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2 papers

Recent·Most cited

Evolutionary BiologyEcology LettersPeer-reviewedApr 1, 2026

Group size dependent selection for cooperation versus freeloading in collective chemical defence

Sophie Van Meyel, Raphael Ritter, Heikki Helanterä, Carita Lindstedt

The paper shows that cooperation in chemical defense is more beneficial in smaller groups, while freeloaders have higher fitness in larger groups of pine sawfly larvae.

1 citation

experimental assayhost-pathogen & immune response

𝕏 PostBluesky

Evolutionary BiologyProceedings of the National Academy of SciencesPeer-reviewedMar 9, 2026

Direct and indirect benefits of cooperation in collective defense against predation

Raphael Ritter, Heikki Helanterä, Riikka Tynkkynen…·Carita Lindstedt

This study shows that cooperative defense in pine sawfly larvae provides both direct and indirect benefits, with individuals adjusting their contributions based on social context.

5 citationstop 1%

experimental assay

𝕏 PostBluesky