Parasite-induced aggression and impaired contest ability in a fish host

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Show simple item record Mikheev, Victor N. Pasternak, Anna F. Taskinen, Jouni Valtonen, Tellervo 2012-11-16T08:10:24Z 2012-11-16T08:10:24Z 2010
dc.identifier.citation Mikheev, V., Pasternak, A., Taskinen, J., & Valtonen, T. (2010). Parasite-induced aggression and impaired contest ability in a fish host. Parasites & Vectors, 3:17. doi:10.1186/1756-3305-3-17 Retrieved from
dc.identifier.issn 1756-3305
dc.description.abstract Abstract Background Success of trophically transmitted parasites depends to a great extent on their ability to manipulate their intermediate hosts in a way that makes them easier prey for target hosts. Parasite-induced behavioural changes are the most spectacular and diverse examples of manipulation. Most of the studies have been focused on individual behaviour of hosts including fish. We suggest that agonistic interactions and territoriality in fish hosts may affect their vulnerability to predators and thus the transmission efficiency of trophically transmitted parasites. The parasite Diplostomum spathaceum (Trematoda) and juvenile rainbow trout, Oncorhynchus mykiss, were used to study whether infection can alter aggression rates and territorial behaviour of intermediate fish hosts. Results The changes in behaviour of rainbow trout, Oncorhynchus mykiss, infected with an eye fluke Diplostomum spathaceum (Trematoda), was monitored over the course of an experimental infection for 1.5 months. At the beginning of their development, not yet infective D. spathaceum metacercariae decreased the aggressiveness of rainbow trout. By the time that metacercariae were fully infective to their definitive hosts, the aggressiveness increased and exceeded that of control fish. Despite the increased aggressiveness, the experimentally infected fish lost contests for a territory (dark parts of the bottom) against the control fish. Conclusions The results obtained indicate that the parasitized fish pay the cost of aggressiveness without the benefit of acquiring a territory that would provide them with better protection against predators. This behaviour should increase transmission of the parasite as expected by the parasite manipulation hypothesis.
dc.language.iso eng
dc.relation.ispartofseries Parasites & Vectors
dc.rights © 2010 Mikheev et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights openAccess fi
dc.subject.other parasite en
dc.subject.other host en
dc.subject.other manipulation en
dc.subject.other host en
dc.subject.other manipulation en
dc.subject.other fish en
dc.subject.other contest en
dc.subject.other loinen fi
dc.subject.other isäntä fi
dc.subject.other manipulointi fi
dc.subject.other kala fi
dc.subject.other kilpailu fi
dc.subject.other Diplostomum
dc.title Parasite-induced aggression and impaired contest ability in a fish host
dc.type Article
dc.subject.kota 118
dc.contributor.laitos Bio- ja ympäristötieteiden laitos fi
dc.contributor.laitos The Department of Biological and Environmental Science en
dc.identifier.doi doi:10.1186/1756-3305-3-17 2012-11-15T14:51:56Z
dc.description.version Publisher's PDF
dc.rights.holder V N Mikheev et al.; licensee BioMed Central Ltd.
dc.type.coar journal article
dc.relation.issn 1756-3305
dc.type.version publishedVersion

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