Conflict between parasites with different transmission strategies infecting an amphipod host
| Autor: | Thierry Rigaud, Karelle Boucansaud, Eleanor R. Haine |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Competitive Behavior
Behavior-altering parasites and parasitoids Virulence Zoology General Biochemistry Genetics and Molecular Biology Acanthocephala Host-Parasite Interactions Gammarus roeseli Animals Parasite hosting Amphipoda General Environmental Science General Immunology and Microbiology biology Transmission (medicine) Host (biology) Reproduction General Medicine biology.organism_classification Fertility Microsporidia Female France General Agricultural and Biological Sciences Polymorphism Restriction Fragment Length Research Article |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences. 272:2505-2510 |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2005.3244 |
| Popis: | Competition between parasites within a host can influence the evolution of parasite virulence and host resistance, but few studies examine the effects of unrelated parasites with conflicting transmission strategies infecting the same host. Vertically transmitted (VT) parasites, transmitted from mother to offspring, are in conflict with virulent, horizontally transmitted (HT) parasites, because healthy hosts are necessary to maximize VT parasite fitness. Resolution of the conflict between these parasites should lead to the evolution of one of two strategies: avoidance, or sabotage of HT parasite virulence by the VT parasite. We investigated two co-infecting parasites in the amphipod host, Gammarus roeseli : VT microsporidia have little effect on host fitness, but acanthocephala modify host behaviour, increasing the probability that the amphipod is predated by the acanthocephalan's definitive host. We found evidence for sabotage: the behavioural manipulation induced by the Acanthocephala Polymorphus minutus was weaker in hosts also infected by the microsporidia Dictyocoela sp. (roeselum) compared to hosts infected by P. minutus alone. Such conflicts may explain a significant portion of the variation generally observed in behavioural measures, and since VT parasites are ubiquitous in invertebrates, often passing undetected, conflict via transmission may be of great importance in the study of host–parasite relationships. |
| Databáze: | OpenAIRE |
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