Diagne C. auteur aut IRD Gilot-Fromont E. auteur aut IRD Cornet S. auteur aut IRD Husse L. auteur aut IRD Doucoure S. auteur aut IRD Dalecky Ambroise auteur aut IRD Ba K. auteur aut IRD Kane M. auteur aut IRD Niang Y. auteur aut IRD Diallo M. auteur aut IRD Sow A. auteur aut IRD Fossati Odile auteur aut IRD Piry S. auteur aut IRD Artige E. auteur aut IRD Sembene M. auteur aut IRD Brouat Carine auteur aut IRD Charbonnel N. auteur aut IRD text journalArticle eng text/pdf born digital access Biological invasions provide unique opportunities for studying life history trait changes over contemporary time scales. As spatial spread may be related to changes in parasite communities, several hypotheses (such as the evolution of increased competitive ability (EICA) or EICA-refined hypotheses) suggest immune changes in invasive species along invasion gradients. Although native hosts may be subject to similar changes in parasite selection pressures, their immune responses have been rarely investigated in invasion contexts. In this study, we evaluated immune variations for invasive house mice Mus musculus domesticus, invasive black rats Rattus rattus and native rodents Mastomys erythroleucus and Mastomys natalensis along well-characterised invasion gradients in Senegal. We focused on antibody-mediated (natural antibodies and complement) and inflammatory (haptoglobin) responses. One invasion route was considered for each invasive species, and environmental conditions were recorded. Natural-antibody mediated responses increased between sites of long-established invasion and recently invaded sites only in house mice. Both invasive species exhibited higher inflammatory responses at the invasion front than in sites of long-established invasion. The immune responses of native species did not change with the presence of invasive species. These patterns of immune variations do not support the EICA and EICA refined hypotheses, and they rather suggest a higher risk of exposure to parasites on the invasion front. Altogether, these results provide a first basis to further assess the role of immune changes in invasion success. specialized SENEGAL 080 082 052 126 3 435-446 2017 0030-1299 https://www.documentation.ird.fr/hor/fdi:010074445 10.1111/oik.03470 0030-1299 [F B010074445] https://www.documentation.ird.fr/hor/fdi:010074445 https://www.documentation.ird.fr/intranet/publi/2018/00/010074445.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-12-06 2024-02-16 fdi:010074445 fre