Rodríguez S M, D'Elía G, Valdivia N
Doctorado en Biología Marina and Instituto de Ciencias Marinas y Limnológicas,Facultad de Ciencias,Universidad Austral de Chile,campus Isla Teja s/n,Valdivia,Chile.
Instituto de Ciencias Ambientales y Evolutivas,Facultad de Ciencias,Universidad Austral de Chile.
J Helminthol. 2017 Sep;91(5):589-596. doi: 10.1017/S0022149X16000638. Epub 2016 Sep 26.
Resolving complex life cycles of parasites is a major goal of parasitological research. The aim of this study was to analyse the life cycle of two species of the genus Profilicollis, the taxonomy of which is still unstable and life cycles unclear. We extracted individuals of Profilicollis from two species of crustaceans (intermediate hosts) and four species of seagulls (definitive hosts) from sandy-shore and estuarine habitats along the south-east Pacific coast of Chile. Mitochondrial DNA analyses showed that two species of Profilicollis infected intermediate hosts from segregated habitats: while P. altmani larvae infected exclusively molecrabs of the genus Emerita from fully marine habitats, P. antarcticus larvae infected the crab Hemigrapsus crenulatus from estuarine habitats. Moreover, P. altmani completed its life cycle in four seagulls, Chroicocephalus maculipennis, Leucopheus pipixcan, Larus modestus and L. dominicanus, while P. antarcticus, on the other hand, completed its life cycle in the kelp gull L. dominicanus. Accordingly, our results show that two congeneric parasites use different and spatially segregated species as intermediate hosts, and both are capable of infecting one species of definitive hosts. As such, our analyses allow us to shed light on a complex interaction network.
解析寄生虫复杂的生命周期是寄生虫学研究的一个主要目标。本研究的目的是分析Profilicollis属两个物种的生命周期，该属的分类学仍不稳定，生命周期也不清楚。我们从智利东南太平洋沿岸沙滩和河口栖息地的两种甲壳类动物（中间宿主）和四种海鸥（终末宿主）中提取了Profilicollis个体。线粒体DNA分析表明，两种Profilicollis感染来自隔离栖息地的中间宿主：虽然阿尔特曼氏Profilicollis幼虫仅感染完全海洋栖息地的Emerita属的沙蟹，南极Profilicollis幼虫感染来自河口栖息地的细纹半黄道蟹。此外，阿尔特曼氏Profilicollis在四种海鸥（黄斑小头鸥、皮氏噪鸥、灰翅鸥和多米尼加鸥）体内完成其生命周期，而南极Profilicollis则在黑背鸥体内完成其生命周期。因此，我们的结果表明，两种同属寄生虫使用不同且空间隔离的物种作为中间宿主，并且两者都能够感染一种终末宿主。据此，我们的分析使我们能够揭示一个复杂的相互作用网络。
