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          Institute: MPI für Evolutionsbiologie     Collection: Evolutionary ecology     Display Documents

ID: 367973.0, MPI für Evolutionsbiologie / Evolutionary ecology
Multidimensionality and intra-individual variation in host manipulation by an acanthocephalan
Authors:Benesh, D. P.; Valtonen, E. T.; Seppälä, O.
Date of Publication (YYYY-MM-DD):2008-04
Title of Journal:Parasitology
Issue / Number:5
Start Page:617
End Page:626
Review Status:not specified
Audience:Not Specified
Abstract / Description: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.
Free Keywords:altered host phenotype; plastic/flexible behaviour; repeatability; Asellus aquaticus; Acanthocephala; intermediate host; isopod
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Evolutionsökologie
External Affiliations:Univ Jyväskylä, Dept Biol & Environm Sci, FI-40014 Jyväskylä, Finland; Swiss Fed Inst Aquat Sci & Technol, EAWAG, CH-8600 Dübendorf, Switzerland; Swiss Fed Inst Technol, Inst Integrat Biol IBZ, CH-8600 Dübendorf, Switzerland
Identifiers:ISSN:0031-1820 [ID-No:1]
DOI:10.1017/S0031182008004216 [ID-No:2]
LOCALID:2623/S 38802 [Listen-Nummer/S-Nummer]
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