European cisco – genetic adaptation to variation in salinity and spawning time

Rémi-André Olsen, bioinformatician at the Department of Biochemistry and Biophysics and based at SciLifeLab in Solna, is part of a new study on European cisco published in Molecular Ecology.

Photo: Mikaela Bergenius Nord

European cisco roe is known as a Swedish delicacy. A new study has shown that there are different types of European cisco in Swedish waters that are each genetically adapted to fresh, saline or brackish water. Genetics also steers when European cisco spawn.

The new knowledge from this study can be used in sustainable management of the species, and for investigating whether the spawning environment affects the quality of the roe.

The study was conducted by researchers at Uppsala University, the Swedish University of Agricultural Sciences (SLU), the Royal Institute of Technology in Stockholm (KTH), Stockholm University, and the Swedish Museum of Natural History, and was recently published in the journal Molecular Ecology.

To read the full press release from Uppsala University, please see European cisco – genetic adaptation to variation in salinity and spawning time

To read the article, please see Genetic Adaptation to Brackish Water and Spawning Season in European Cisco

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Last updated: September 26, 2025

Source: DBB

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