A1 Journal article (refereed)
Negative associations between parasite avoidance, resistance and tolerance predict host health in salmonid fish populations (2020)

Klemme, I., Hyvärinen, P., & Karvonen, A. (2020). Negative associations between parasite avoidance, resistance and tolerance predict host health in salmonid fish populations. Proceedings of the Royal Society B : Biological Sciences, 287(1952), Article 20200388. https://doi.org/10.1098/rspb.2020.0388

JYU authors or editors

Publication details

All authors or editors: Klemme, Ines; Hyvärinen, Pekka; Karvonen, Anssi

Journal or series: Proceedings of the Royal Society B : Biological Sciences

ISSN: 0962-8452

eISSN: 1471-2954

Publication year: 2020

Volume: 287

Issue number: 1952

Article number: 20200388

Publisher: The Royal Society Publishing

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1098/rspb.2020.0388

Research data link: https://doi.org/10.5061/dryad.g4f4qrfmt

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68808

Abstract

Genetic variation in defence against parasite infections is fundamental for host–parasite evolution. The overall level of defence of a host individual or population includes mechanisms that reduce parasite exposure (avoidance), establishment (resistance) or pathogenicity (tolerance). However, how these traits operate and evolve in concert is not well understood. Here, we investigated genetic variation in and associations between avoidance, resistance and tolerance in a natural host–parasite system. Replicated populations of Atlantic salmon (Salmo salar) and sea trout (an anadromous form of brown trout, Salmo trutta) were raised under common garden conditions and infected with the eye fluke Diplostomum pseudospathaceum. We demonstrate significant genetic variation in the defence traits across host populations and negative associations between the traits, with the most resistant populations showing the weakest avoidance and the lowest infection tolerance. These results are suggestive of trade-offs between different components of defence and possibly underlie the genetic variation in defence traits observed in the wild. Because the three defence mechanisms affect host–parasite evolution in profoundly different ways, we emphasize the importance of studying these traits in concert.

Keywords: parasitism; host animals; Salmoniformes; populations; animal behaviour; resistance (medicine); tolerance (physical); genetic variation; parasites; trematoda

Free keywords: avoidance; host defence; resistance; trade-off; trematode parasite; tolerance

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Related projects

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 3