This study highlights the value of museum collections in invasion biology. It focuses on introduced tilapias, Oreochromis niloticus and Coptodon rendalli in the Congo Basin and their monogenean (Platyhelminthes) gill parasite fauna. O. niloticus was introduced throughout the Congo Basin while C. rendalli was introduced into the Lower Congo, but is native to the Middle and Upper Congo. In order to study the impact of these stocking events on the native parasite community we investigate the co-introduction and host switching of their parasites. Post-introduction material is compared with pre-introduction samples from museum collections of 5 native tilapias in the Congo Basin. Nine of the known parasites of O. niloticus were co-introduced, while one, Cichlidogyrus rognoni, is missing and possibly not established. In contrast, no parasite species were found co-introduced with C. rendalli into the Lower Congo. The parasite fauna of Tilapia sparrmanii shared no species with O. niloticus. Oreochromis mweruensis shared five species with O. niloticus, but these were also found on the pre-introduction samples, and are considered native to both hosts. We report three putative host switches: Cichlidogyrus sclerosus and Cichlidogyrus tilapiae to Coptodon tholloni in the Lower Congo Basin and Gyrodactylus nyanzae to C. rendalli in the Upper Congo.

这项研究突出了博物馆藏品在入侵生物学中的价值。它着重介绍了刚果盆地中引进的罗非鱼，尼罗罗非鱼和伦巴第（Coptodon rendalli）及其单子g（Platyhelminthes）para寄生动物。尼罗罗非鱼（O. niloticus）被引入整个刚果盆地，而兰达利梭菌（C. rendalli）被引入刚果下游地区，但原产于中刚果。为了研究这些放养事件对本地寄生虫社区的影响，我们调查了它们的寄生虫的共引进和寄主转移。将引入后的材料与来自刚果盆地的5种当地罗非鱼的博物馆藏品中的引入前样品进行比较。尼罗罗非鱼的九种已知寄生虫是共同介绍的，而Cichlidogyrus rognoni则丢失了，可能还没有建立。相反，未发现与伦达里梭菌共同引入下刚果的寄生虫物种。罗非鱼罗非鱼的寄生动物区系与尼罗罗非鱼没有共享种。莫氏古猿与尼罗罗非鱼共有五个物种，但在引种前的样品中也发现了它们，并且被认为是两个宿主的原生物种。我们报告三个假定主机开关：Cichlidogyrus硬化性和Cichlidogyrus tilapiae到Coptodon tholloni的下刚果盆地和三代虫nyanzae到上刚果的C. rendalli。