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          Institute: MPI für Evolutionsbiologie     Collection: Evolutionary ecology     Display Documents

ID: 391471.0, MPI für Evolutionsbiologie / Evolutionary ecology
The effect of Echinorhynchus borealis (Acanthocephala) infection on the anti-predator behavior of a benthic amphipod
Authors:Benesh, D. P.; Kitchen, J.; Pulkkinen, K.; Hakala, I.; Valtonen, E. T.
Date of Publication (YYYY-MM-DD):2008-04
Title of Journal:Journal of Parasitology
Journal Abbrev.:J. Parasitol.
Issue / Number:2
Start Page:542
End Page:545
Review Status:not specified
Audience:Not Specified
Abstract / Description:In benthic habitats, predators can generally not be detected visually, so olfaction may be particularly important for inducing anti-predation behaviors in prey organisms. Manipulative parasites infecting benthic hosts could suppress these responses so as to increase the probability of predation and thus trophic transmission. We studied how infection with the acanthocephalan Echinorhynchus borealis affects the response of the benthic amphipod Pallasea quadrispinosa to water conditioned by burbot (Lota lota), the parasite's definitive host. In normal lake water, refuge use by infected and uninfected amphipods was similar, but when exposed to burbot-conditioned water, uninfected amphipods spent much more time hiding than infected amphipods. Thus, rather than affecting ambient hiding behavior, E. borealis infection seems to alter host response to a predator. A group of amphipods sampled from a postglacial spring that is devoid of fish predators exhibited only a weak response to burbot-conditioned water, perhaps suggesting these anti-predator behaviors are costly to maintain. The hiding behavior of spring and infected amphipods was very similar. If the reduced refuge use by the spring amphipods reflects adaptation to a predator-free environment, this indicates that E. borealis severely weakens its host's anti-predator behavior. Presumably this increases the likelihood of parasite transmission.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Evolutionsökologie
External Affiliations:Department of Biological and Environmental Science, POB 35, FI-40014 University of Jyvaeskylae, Finland; Lammi Biological Station, University of Helsinki, Paeaejaerventie 320, 16900 Lammi, Finland;
Identifiers:ISSN:0022-3395 [ID-No:1]
DOI:10.1645/GE-1380.1 [ID-No:2]
LOCALID:2647/S 38921 [Listen-Nummer/S-Nummer]
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