Relationships between parasitism and invasion success are increasingly evidenced in the literature. However, the dynamic nature of the major parasite-related processes has been rarely taken into account until now, while the residence time of invaders in colonized regions was shown to be associated to crucial changes in parasite communities. Here, we strive to bridge this gap using a temporal survey of rodent populations along one invasion route of the exotic house mouse Mus musculus domesticus that currently invades North Senegal. In this study, we investigated whether gastrointestinal helminth (GIH) assemblages changed over time in native (Mastomys erythroleucus) and/or invasive (M. m. domesticus) rodent populations sampled at an invasion front, and whether these potential changes may be associated to the invasion success of the exotic mouse. Four years separated two rodent sampling campaigns (2013 and 2016/17) in six localities. Despite being relatively short, the timeframe considered here allowed to evidence significant patterns in rodent communities and their GIH assemblages. At the host community level, we showed that the exotic mouse was now established at all sites, becoming the dominant species in sites where it was not recorded before. At the GIH community level, increased infection of the single shared cestode (Mathevotaenia symmetrica) in both rodent species brought support to the “spill-back” hypothesis. Infection levels of GIH that remained low at the invasion front in invading mice over time also supported the “enemy release” hypothesis. Both hypotheses should deserve further experimental work to demonstrate their role in the invasion success of the house mouse in Senegal.

文献中越来越证实寄生虫与入侵成功之间的关系。然而，直到现在为止，几乎没有考虑到与寄生虫有关的主要过程的动态性质，而入侵者在殖民地区的停留时间却与寄生虫群落的关键变化有关。在这里，我们努力通过沿当前入侵塞内加尔北部的外来家鼠小家鼠的一种入侵途径对啮齿动物种群进行时间调查来弥合这一差距。在这项研究中，我们调查了天然（Mastomys erythroleucus）和/或侵入性（M. m。domesticus）胃肠道蠕虫（GIH）组合是否随时间变化。）在入侵前沿采样的啮齿动物种群，以及这些潜在的变化是否可能与外来小鼠的入侵成功有关。四年在六个地方分开进行了两次啮齿动物采样活动（2013年和2016/17年）。尽管时间相对较短，但此处考虑的时间框架可以证明啮齿动物群落及其GIH组合的显着模式。在宿主社区级别，我们表明外来老鼠现已在所有地点建立起来，成为以前从未记录过的地点的优势物种。在GIH社区一级，单个共享尾est（Mathevotaenia symmetrica）在这两种啮齿动物中都为“溢出”假说提供了支持。随着时间的流逝，入侵小鼠的GIH感染水平一直处于入侵前沿，这也支持“敌人释放”假说。两种假设都应进行进一步的实验工作，以证明它们在塞内加尔家鼠入侵成功中的作用。