Variation between populations and local adaptation in acanthocephalan-induced parasite manipulation. - Archive ouverte HAL Access content directly
Journal Articles Evolution - International Journal of Organic Evolution Year : 2010

Variation between populations and local adaptation in acanthocephalan-induced parasite manipulation.

Abstract

Many trophically transmitted parasites manipulate their intermediate host phenotype, resulting in higher transmission to the final host. However, it is not known if manipulation is a fixed adaptation of the parasite or a dynamic process upon which selection still acts. In particular, local adaptation has never been tested in manipulating parasites. In this study, using experimental infections between six populations of the acanthocephalan parasite Pomphorhynchus laevis and its amphipod host Gammarus pulex, we investigated whether a manipulative parasite may be locally adapted to its host. We compared adaptation patterns for infectivity and manipulative ability. We first found a negative effect of all parasite infections on host survival. Both parasite and host origins influenced infection success. We found a tendency for higher infectivity in sympatric versus allopatric combinations, but detailed analyses revealed significant differences for two populations only. Conversely, no pattern of local adaptation was found for behavioral manipulation, but manipulation ability varied among parasite origins. This suggests that parasites may adapt their investment in behavioral manipulation according to some of their host's characteristics. In addition, all naturally infected host populations were less sensitive to parasite manipulation compared to a naive host population, suggesting that hosts may evolve a general resistance to manipulation.

Dates and versions

hal-00509890 , version 1 (17-08-2010)

Identifiers

Cite

Nathalie Franceschi, Stéphane Cornet, Loïc Bollache, François-Xavier Dechaume-Moncharmont, Alexandre Bauer, et al.. Variation between populations and local adaptation in acanthocephalan-induced parasite manipulation.. Evolution - International Journal of Organic Evolution, 2010, 64 (8), pp.2417-2430. ⟨10.1111/j.1558-5646.2010.01006.x⟩. ⟨hal-00509890⟩
57 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More