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  Multidimensionality and intra-individual variation in host manipulation by an acanthocephalan

Benesh, D. P., Valtonen, E. T., & Seppälä, O. (2008). Multidimensionality and intra-individual variation in host manipulation by an acanthocephalan. Parasitology, 135(5), 617-626. doi:10.1017/S0031182008004216.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D6C7-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D6C8-E
Genre: Journal Article

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Benesh, D. P.1, Author              
Valtonen, E. T., Author
Seppälä, O., Author
Affiliations:
1Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445634              

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Free keywords: altered host phenotype; plastic/flexible behaviour; repeatability; Asellus aquaticus; Acanthocephala; intermediate host; isopod
 Abstract: Trophically-transmitted parasites frequently alter multiple aspects of their host's phenotype. Correlations between modified characteristics may suggest how different traits are mechanistically related, but these potential relationships remain unexplored. We recorded 5 traits from individual isopods infected with an acanthocephalan (Acanthocephalus lucii): hiding, activity, substrate colour preference, body (pereon) coloration, and abdominal (pleon) coloration. Infected isopods hid less and had darker abdominal coloration than uninfected isopods. However, in 3 different experiments measuring hiding behaviour (time-scales of observation: 1 h, 8 h, 8 weeks), these two modified traits were not correlated, suggesting they may arise via independent mechanisms. For the shorter experiments (1 h and 8 h), confidence in this null correlation was undermined by low experimental repeatability, i.e. individuals did not behave similarly in repeated trials of the experiment. However, in the 8-Nveek experiment, hiding behaviour was relatively consistent within individuals, so the null correlation at this scale indicates, less equivocally, that hiding and coloration are unrelated. Furthermore, the difference between the hiding behaviour of infected and uninfected isopods varied over 8 weeks, suggesting that the effect of A. lucii infection on host behaviour changes over time. We emphasize the importance of carefully designed protocols for investigating multidimensionality in host manipulation.

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Language(s): eng - English
 Dates: 2008-04
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 367973
DOI: 10.1017/S0031182008004216
Other: 2623/S 38802
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Title: Parasitology
Source Genre: Journal
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Pages: - Volume / Issue: 135 (5) Sequence Number: - Start / End Page: 617 - 626 Identifier: ISSN: 0031-1820