A1 Journal article (refereed)
Variation in parasite resistance of Arctic charr, Salvelinus alpinus, between and within sympatric morphs (2021)

Karvonen, A., Beck, S. V., Skúlason, S., Kristjánsson, B. K., & Leblanc, C. A. (2021). Variation in parasite resistance of Arctic charr, Salvelinus alpinus, between and within sympatric morphs. Ecology and Evolution, 11(20), 14024-14032. https://doi.org/10.1002/ece3.8109

JYU authors or editors

Publication details

All authors or editors: Karvonen, Anssi; Beck, Samantha V.; Skúlason, Skúli; Kristjánsson, Bjarni K.; Leblanc, Camille A.

Journal or series: Ecology and Evolution

eISSN: 2045-7758

Publication year: 2021

Volume: 11

Issue number: 20

Pages range: 14024-14032

Publisher: Wiley-Blackwell

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1002/ece3.8109

Research data link: https://doi.org/10.5061/dryad.bvq83bk95

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77881


Genetic variation in resistance against parasite infections is a predominant feature in host–parasite systems. However, mechanisms maintaining genetic polymorphism in resistance in natural host populations are generally poorly known. We explored whether differences in natural infection pressure between resource-based morphs of Arctic charr (Salvelinus alpinus) have resulted in differentiation in resistance profiles. We experimentally exposed offspring of two morphs from Lake Þingvallavatn (Iceland), the pelagic planktivorous charr (“murta”) and the large benthivorous charr (“kuðungableikja”), to their common parasite, eye fluke Diplostomum baeri, infecting the eye humor. We found that there were no differences in resistance between the morphs, but clear differences among families within each morph. Moreover, we found suggestive evidence of resistance of offspring within families being positively correlated with the parasite load of the father, but not with that of the mother. Our results suggest that the inherited basis of parasite resistance in this system is likely to be related to variation among host individuals within each morph rather than ecological factors driving divergent resistance profiles at morph level. Overall, this may have implications for evolution of resistance through processes such as sexual selection.

Keywords: variation (biology); genetic variation; resistance (medicine); parasitism; parasites; trematoda; char

Free keywords: adaptive radiation; breeding coloration; freshwater fish ecotype; host– parasite interaction; immunogenes; speciation; trematode

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Last updated on 2021-18-11 at 08:03