Aquatic Contaminants Research Division, Water Science and Technology Directorate, Science and Technology Branch, Environment and Climate Change Canada, St. Lawrence Centre, 105 McGill Street, 7th floor, Montreal, Quebec H2Y 2E7, Canada; and St. Andrews Biological Station, 125 Marine Science Drive, St. Andrews, New Brunswick E5B 0E4, Canada.
83 Rhodenizer Lake Road, Dayspring, Nova Scotia B4V 5R7, Canada.
J Parasitol. 2021 Jan 1;107(1):39-47. doi: 10.1645/20-76.
Few studies have examined community structure among myxozoan species in fish. Herein myxozoan communities are described from 2 cyprinid species, the spottail shiner (Notropis hudsonius) and the common shiner (Luxilus cornutus), from mesotrophic and eutrophic localities in rivers in southwestern Quebec, Canada. Four myxozoan species were found, and total prevalence ranged from 60 to 86.7% in spottail shiners at 4 localities along the Richelieu River. Component species richness ranged from 2 to 4 and mean infracommunity richness from 0.87 to 1.47. Prevalence, component species richness, and infracommunity species richness in the spottail shiner were comparable to those from other localities in the Great Lakes and St. Lawrence River that were exposed to municipal effluents. Nine myxozoan species were found in common shiners from the Bras d'Henri micro-watershed. Component species richness varied from 6 to 8 at 4 localities, with total prevalence being 100% at all localities except 1, where it was 80%. Mean infracommunity richness ranged from 1.73 to 2.27. Prevalence, component species richness, and infracommunity species richness in the common shiner from the Bras d'Henri micro-watershed were among the highest observed for myxozoan communities from any host species to date. It is concluded that moderate levels of eutrophication are sufficient to generate species-rich communities of myxozoan parasites in fishes.
鲜有研究检验过鱼类粘孢子虫物种的群落结构。本研究描述了来自加拿大魁北克省西南部河流中两种鲤科鱼类（斑点梭鲈和普通梭鲈）的粘孢子虫群落。在 4 个里歇尔ieu 河沿岸的地点，共发现了 4 种粘孢子虫，斑点梭鲈的总流行率在 60%至 86.7%之间。组成种丰富度的范围为 2 至 4，平均亚群落丰富度的范围为 0.87 至 1.47。斑点梭鲈的流行率、组成种丰富度和亚群落物种丰富度与在大湖和圣劳伦斯河暴露于市政废水的其他地点相似。在 Henri 微流域的普通梭鲈中发现了 9 种粘孢子虫。在 4 个地点，组成种丰富度从 6 到 8 不等，除了 1 个地点的流行率为 80%外，所有地点的流行率均为 100%。平均亚群落丰富度的范围为 1.73 至 2.27。Henri 微流域普通梭鲈的流行率、组成种丰富度和亚群落物种丰富度是迄今为止观察到的任何宿主物种的粘孢子虫群落中最高的。本研究得出结论，适度的富营养化足以在鱼类中产生丰富的粘孢子虫寄生虫群落。
