The association between parasite infection and growth rates in Arctic charr: do fast growing fish have more parasites?
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Trophically transmitted parasites are known to impair fish growth in experimental studies, but this is not well documented in natural populations. For Arctic charr [Salvelinus alpinus (L.)], individual growth is positively correlated with food consumption. However, increased food consumption will increase the exposure to trophically transmitted parasites. Using a correlative approach, we explore the association between parasite abundance and the individual growth of Arctic charr from five lakes within the same watercourse. The studied parasite species differ in their life cycles and cost to the host. We predicted a positive association between parasite abundance and fish growth for parasites of low pathogenicity reflecting high consumption rates, and a negative association at higher parasite abundances for more costly parasites. We found no direct negative associations between parasite abundance and fish growth. The relationship between parasite abundance and growth was linearly positive for the low costly Crepidostomum sp. and concave for the more costly Eubothrium salvelini. In natural fish populations, the negative effects of parasites on fish growth might be outweighed by the energy assimilated from feeding on the intermediate host. However, experimental studies with varying food consumption regimes are needed to determine the mechanisms underlying our observations.
KeywordsTrophic transmission Fish growth Salvelinus alpinus Host–parasite interactions
We thank the following people for field sampling and/or laboratory work: P. A. Amundsen, M. S. Berg, C. Bye, L. Dalsbø, A. P. Eloranta, K. Ø. Gjelland, M. Gabler, B. S. Knudsen, R. Kristoffersen, J. A. Kuhn, K. Johannessen, and K. J. O’Connor. Two anonymous reviewers provided helpful and constructive comments.
- Amundsen, P. A., H. M. Gabler & F. J. Staldvik, 1996. A new approach to graphical analysis of feeding strategy from stomach contents data—modification of the Costello (1990) method. Journal of Fish Biology 48: 607–614.Google Scholar
- Barber, I., H. A. Wright, S. A. Arnott & R. J. Wootton, 2008. Growth and energetics in the stickleback-Schistocephalus host parasite system: a review of experimental infection studies. Behaviour 145: 4–5.Google Scholar
- Bylund, G., 1972. Pathogenic effects of a Diphyllobothriid plerocercoid on its host fishes. Commentationes Biologicae. Societas Scientiarum Fennica, Helsinki: 58.Google Scholar
- Curtis, M. A., 1984. Diphyllobothrium spp. and the Arctic charr: parasite acquisition and its effects on a lake-resident population. In Johnson, L. & B. I. Burns (eds), Biology of the Arctic charr., Proceedings of the International Symposium on a Arctic charr, Winnipeg, Manitoba University of Manitoba Press, Winnipeg: 395–411.Google Scholar
- Gerdeaux, D., M. A. Fillon & L. Van Overmeire, 1995. Arctic charr, Salvelinus alpinus, of Lake Annecy: yield, growth and parasitism by Eubothrium salvelini. Nordic Journal of Freshwater Research 71: 245–251.Google Scholar
- Halvorsen, O., 1970. Studies of the helminth fauna of Norway XV: on the taxonomy and biology of plerocercoids of Diphyllobothrium Cobbold, 1858 (Cestoda, Pseudophyllidea) from north-western Europe. Nytt Magasin for Zoologi 18: 113–174.Google Scholar
- Henriksen, E. H., R. Knudsen, R. Kristoffersen, A. M. Kuris, K. D. Lafferty, A. Siwertsson & P.-A. Amundsen, 2016. Ontogenetic dynamics of infection with Diphyllobothrium spp. cestodes in sympatric Arctic charr Salvelinus alpinus (L.) and brown trout Salmo trutta L. Hydrobiologia 783: 37–46.CrossRefGoogle Scholar
- Krkosek, M., C. W. Revie, P. G. Gargan, O. T. Skilbrei, B. Finstad & C. D. Todd, 2013. Impact of parasites on salmon recruitment in the Northeast Atlantic Ocean. Proceedings of the Royal Society B 280: 1–8.Google Scholar
- Oksanen, J., F. G. Blanchet, R. Kindt, P. Legendre, P. R. Minchin, R. B. O’hara, G. L. Simpson, P. Solymos, M. H. H. Stevens, H. Wagner, & M. J. Oksanen, 2013. Package ‘vegan.’ Community ecology package, version 2.9.Google Scholar
- R Core Team, 2018. R: A language and environment for statistical computing. R Foundation for statistical computing, Vienna, Austria. http://www.R-project.org/
- Soldánová, M., S. Georgieva, J. Roháčová, R. Knudsen, J. A. Kuhn, E. H. Henriksen, A. Siwertsson, J. C. Shaw, A. M. Kuris, P.-A. Amundsen, T. Scholz, K. D. Lafferty & A. Kostadinova, 2017. Molecular analyses reveal high species diversity of trematodes in a sub-Arctic lake. International Journal for Parasitology 47: 327–345.CrossRefGoogle Scholar
- Vik, R., 1957. Studies of the helminth fauna of Norway. I. Taxonomy and ecology of Diphyllobothrium norvegicum n. sp. and the plerocercoid of Diphyllobothrium latum (L.). Nytt Magasin for Zoologi 5: 26–93.Google Scholar
- Vik, R., 1958. Studies of the helminth fauna of Norway. II. Distribution and life cycle of Cyathocephalus truncatus (Pallas, 1781) (Cestoda). Nytt Magasin for Zoologi 6: 97–110.Google Scholar
- Wootton, R. J., 1998. Ecology of teleost fishes. Kluwer, London.Google Scholar