Доклады Академии наукДоклады Академии наук0869-5652The Russian Academy of Sciences1770210.31857/S0869-56524884457-460Research ArticlePersonality influences risk of parasitism in fishMikheevV. N.vicnikmik@gmail.comPasternakA. F.vicnikmik@gmail.comTaskinenJ.vicnikmik@gmail.comSevertsov Institute of Ecology and Evolution of the Russian Academy of SciencesP. Shirshov Institute of Oceanology of the Russian Academy of SciencesUniversity of Jyväskylä1010201948844574601111201911112019Copyright © 2019, Russian academy of sciences2019<p>Influence of fish personality on infection rate is almost not studied. In the experiments on the young-of-the-year <em>Oncorhynchus mykiss</em> and cercariae of a trematode <em>Diplostomum pseudospathaceum</em> we tested the hypothesis that infection rate differs between more and less active (bold and shy) fish. Will individual differences in infection persist upon re-infection? Fish serve as a second intermediate host for this trematode. A positive correlation was found between the results of consecutive infections. Accumulation of parasites with successive infections leads to an aggregated distribution of <em>D. pseudospathaceum</em> among the hosts, affecting individual fitness and polymorphism in fish populations. Persistent individual differences in parasite burden among fish and, as a result, vulnerability for predators confirms the role of parasites as an important factor of natural selection.</p>personalityfishtrematode cercariaeDiplostomum pseudospathaceumparasite burdenиндивидуальность поведениярыбыцеркарии трематодDiplostomum pseudospathaceumзаражённость паразитами[Barber I., Dingemanse N.J. // Philos. Tr. Roy. Soc. B. 2010. V. 365. P. 4077-4088.][Budaev S.V., Mikheev V.N., Pavlov D.S. // Biology Bull. Rev. 2015. V. 76. № 1. P. 26-47.][Gopko M.V., Mikheev V.N., Taskinen J. // Behav. Ecol. Sociobiol. 2015. V. 69. P. 1723-1730.][Kekäläinen J., Lai Y.T., Vainikka A., Sirkka I., Kortet R. // Behav. Ecol. Sociobiol. 2014. V. 68. P. 197-204.][Koolhaas J.M. // Brain Behav. Immun. 2008. V. 22. P. 662-667.][Koprivnikar J., Gibson C.H., Redfern J.C. // Proc. R. Soc. Lond. B. 2012. V. 279. P. 1544-1550.][Kortet R., Hedrick A.V., Vainikka A. // Ecol. Lett. 2010. V. 13. P. 1449-1458.][Mikheev V.N., Pasternak A.F., Taskinen J., Valtonen E.T. // Parasites & Vectors. 2013. V. 6. P. 301.][Mikheev V.N., Pasternak A.F., Taskinen J., Valtonen E.T. // Parasites & Vectors. 2014. V. 7. P. 281.][Shaw D.J., Grenfell B.T., Dobson A.P. // Parasitology. 1998. V. 117. P. 597-610.][Sih A., Bell A.M., Johnson J.C. // Trends Ecol. Evol. 2004. V. 19. P. 372-378.][Sneddon L.U. // J. Fish Biol. 2003. V. 62. P. 971-975.][Wilson D.S., Coleman K., Clark A.B., Biederman L. // J. Comp. Psychol. 1993. V. 107. P. 250-260.][Wolf M., van Doorn G.S., Leimar O., Weissing F.J. // Nature. 2007. V. 447. P. 581-585.]