Clément Lagrue

TL;DR: The results indicate that the modifications induced by P. laevis are specific to the definitive host and do not increase the risk of predation by inappropriate hosts, here the adult edible frog Rana esculenta.

TL;DR: Gammarus roeseli is an invasive amphipod, for which the causes of establishment in rivers where the native species, Gammarus pulex, predominates remain unstudied, and the mechanisms influencing prey selection and antipredator behaviour are determined.

TL;DR: Results demonstrate that competition between parasite genotypes may be strong, and suggest that the frequency of mixed-clone infections in this system may have selected for an increased level of host exploitation in the parasite population, such that a single-clone is associated with a high degree of host phenotypic alteration.

TL;DR: DNA barcoding is used to assess genetic diversity within and among amphipod populations and examined mate discrimination and pre-copulatory pair formation between genetically divergent individuals, suggesting cryptic diversity is common in the G. fossarum/G.pulex groups and that pre-zygotic isolation through mate discrimination, rather than post-zyGotic incompatibility, is likely to drive cryptic speciation.

TL;DR: It is demonstrated experimentally that C. parvum can modulate its development in its amphipod intermediate host and adopt either the abbreviated or the normal life cycle depending on current transmission opportunities or the degree of intra‐host competition among individual parasites.