Author

Ratna Karatgi

University of Illinois Urbana-ChampaignORCID 0009-0002-4865-7194Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Animal Behavior & Cognition· 1 Evolutionary Biology· 1

Signature Assays, Organisms & Methods

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Organism:zebrafish· 2 Assay:behavioral assay· 1 Assay:bulk RNA-seq· 1 Research Focus:cell type annotation· 1 Research Focus:differential expression· 1 Research Focus:ecology & biodiversity· 1 Approach:experimental assay· 1 Approach:statistical model· 1

Frequent Co-Authors

Rebecca C. FulleriD· 2 shared CHI-HING CHRISTINA CHENGiD· 1 shared Giovanni MadrigaliD· 1 shared Julian CatcheniD· 1 shared

Activity by Year

2025-2026 · peak 1/yr

Co-Author Collaboration Network

4 top collaborators · 6 mutual co-author links

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2 shared papersEvolutionary Biology

Rebecca C. FullerORCID

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2 papers

Recent·Most cited

Evolutionary BiologybioRxivPreprintSep 8, 2026

Transcriptomic differences underlying fin sexual dichromatism and male color polymorphism in bluefin killifish (Lucania goodei)

Ratna Karatgi, CHI-HING CHRISTINA CHENG, Giovanni Madrigal…·Rebecca C. Fuller

This study identifies transcriptomic differences underlying color variation in bluefin killifish, revealing genes involved in pigment pathways and light-sensitive phenotypic plasticity.

DOI 10.64898/2026.09.04.749336

zebrafishbulk RNA-seq

𝕏 PostBluesky

Animal Behavior & CognitionEcology and EvolutionPeer-reviewedMar 1, 2025

When Rivals Are Absent: Male Aggression Towards Females in Bluefin Killifish

Ratna Karatgi, Rebecca C. Fuller

This study investigates reproductive costs in bluefin killifish by manipulating sex ratios and densities, finding that male aggression towards females is highest when males lack rivals.

DOI 10.1002/ece3.71048

zebrafishbehavioral assay

𝕏 PostBluesky