An evolutionarily distinct ringed seal in the Ilulissat Icefjord

Researchers have identified a unique ringed seal ecotype, locally known as 'Kangia,' within the Ilulissat Icefjord. This distinct population, genetically divergent from other Arctic ringed seals for approximately 240,000 years, exhibits strong selection in genes linked to pelage coloration, growth, and osmoregulation, explaining its phenotypic and behavioral uniqueness. Despite ongoing gene flow, the study suggests secondary contact since the Last Glacial Maximum, challenging the traditional view of Arctic regions as evolutionary freezers. The findings underscore the value of indigenous knowledge in guiding scientific discovery and highlight the need to reassess how Arctic species may respond differently to environmental changes.

Rosing‐Asvid, A., Löytynoja, A., Momigliano, P., Hansen, R. G., Scharff‐Olsen, C. H., Valtonen, M., Kammonen, J., Dietz, R., Rigét, F. F., Ferguson, S. H., Lydersen, C., Kovacs, K. M., Holland, D. M., Jernvall, J., Auvinen, P., & Tange Olsen, M. (2023). An evolutionarily distinct ringed seal in the Ilulissat Icefjord. Molecular Ecology, 32(22), 5932–5943. Portico. https://doi.org/10.1111/mec.17163