Galaxias maculatus is an abundant freshwater fish species in Chilean continental waters where it plays important ecological functions, yet few parasitological records of this species exist in Chile and all of them cover a very limited geographic range. The objective of this study was to assess large scale geographic variation in composition of parasite infracommunities of Galaxias maculatus. Specifically, parasite infracommunities of this species were compared among 11 locations across 9 degrees of latitude and 3 ecosystem types (lake, river and estuary). Most taxa found had been previously reported in Chile and Argentina. However, this is the first report for Tylodelphys sp. in this host in Chile. Furthermore, the cranial parasite Tylodelphys sp. had the highest overall prevalence and abundance compared to other parasite species. Despite the fact that the abundance of Tylodelphys sp. was not significantly correlated with Fulton’s condition factor of fish, infected fish seem to have a better body condition compared to uninfected ones. The most important source of variation in composition of infracommunities was the sampling location. Furthermore, fish from lakes have a different composition of parasite infracommunities mainly due to higher abundances of Tylodelphys sp.

中文翻译：

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智利南部（南纬 38-47°）Galaxias maculatus Jenyns 1842（Osmeriformes：Galaxiidae）中后生动物寄生虫群落组成的地理变异

Galaxias maculatus 是智利大陆水域中的一种丰富的淡水鱼类，在那里它发挥着重要的生态功能，但在智利几乎没有该物种的寄生虫学记录，而且它们都覆盖了非常有限的地理范围。本研究的目的是评估 Galaxias maculatus 寄生虫群落组成的大规模地理变异。具体而言，该物种的寄生虫群落群落在 9 个纬度和 3 个生态系统类型（湖泊、河流和河口）的 11 个地点进行了比较。大多数发现的分类群以前曾在智利和阿根廷报告过。然而，这是 Tylodelphys sp 的第一份报告。在智利的这个主机。此外，颅内寄生虫 Tylodelphys sp。与其他寄生虫物种相比，具有最高的总体流行率和丰度。尽管大量的 Tylodelphys sp。与鱼的富尔顿条件因子没有显着相关性，与未感染的鱼相比，受感染的鱼似乎有更好的身体状况。下社区组成变化的最重要来源是采样位置。此外，来自湖泊的鱼类具有不同的寄生虫群落组成，这主要是由于 Tylodelphys sp 的丰度较高。