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首页> 外文期刊>Canadian Journal of Zoology >Parasites of spottail shiners (Notropis hudsonius) in the St. Lawrence River: effects of municipal effluents and habitat
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Parasites of spottail shiners (Notropis hudsonius) in the St. Lawrence River: effects of municipal effluents and habitat

机译：圣劳伦斯河中点尾光（Notropis hudsonius）的寄生虫：市政污水和栖息地的影响

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摘要

Parasite communities were examined from spottail shiners (Notropis hudsonius (Clinton, 1824)) collected from nine localities in the St. Lawrence River around the Island of Montréal and downstream from its municipal effluents in June and September 1998-2000. A total of 30 taxa were found, the most common being Diplosiomum spp. Parasite communities were dominated by digeneans, most of which were larval stages that infect birds as definitive hosts. Mean abundance of the most common parasites varied among localities and years. Component community and mean infracommunity species richness fluctuated within and among years at the various localities. Similarity analyses demonstrated that parasite component communities from the different localities could bepartitioned according to season, year, and water mass. Canonical correspondence analysis demonstrated that the parasite component communities from the different localities could be distinguished clearly, indicating that the fish in the different localities compose separate populations or stocks. Year, season, and water mass correlated most strongly among the species-environment relationships. The abundance and distribution of parasite species appeared to be subtly influenced by environmental contaminants and urban effluents, leading to slight reductions in parasite diversity. However, the parasite species composition at the various localities more clearly reflected the local food-web structure and biodiversity in terms of the distributions of variousinvertebrate groups, piscivorous fish, and waterfowl along the St. Lawrence River.
机译：从1998年6月和1998年9月从蒙特利尔岛附近的圣劳伦斯河的9个地方及其市政污水的下游收集的点尾发光物（Notropis hudsonius（克林顿，Clinton，1824））检查了寄生虫群落。总共发现了30个分类单元，最常见的是Diplosiomum spp。寄生虫群落以双基因动物为主，其中大多数是幼虫阶段，感染鸟类作为确定的宿主。最常见的寄生虫的平均含量随地区和年份的不同而不同。在不同地区，年份之间以及年份之间，组成群落和平均群落下物种的丰富度都在波动。相似性分析表明，可以根据季节，年份和水量对不同地区的寄生虫成分群落进行划分。典型的对应分析表明，可以清楚地区分不同地方的寄生虫成分群落，这表明不同地方的鱼类组成了不同的种群或种群。在物种与环境的关系中，年，季节和水量之间的关系最为密切。寄生虫种类的丰富和分布似乎受到环境污染物和城市污水的微妙影响，导致寄生虫多样性略有减少。然而，就沿圣劳伦斯河沿岸的各种无脊椎动物群，食鱼和水禽的分布而言，各地的寄生虫物种组成更清楚地反映了当地的食物网结构和生物多样性。

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