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Associations between pharmaceutical contaminants, parasite load and health status in brown trout exposed to sewage effluent in a small stream
Ecohydrology & Hydrobiology ( IF 2.6 ) Pub Date : 2020-09-15 , DOI: 10.1016/j.ecohyd.2020.09.001
Markéta Pravdová , Jitka Kolářová , Kateřina Grabicová , Libor Mikl , Martin Bláha , Tomáš Randák , Yurii Kvach , Pavel Jurajda , Markéta Ondračková

Owing to their widespread use, pharmaceuticals have become important pollutants of the aquatic environment. Pharmaceuticals and parasites can affect the immunity, physiology and behaviour of target organisms, both singly and through interaction. In this study, we related pharmaceutical concentration, parasite infection and condition in brown trout (Salmo trutta m. fario) collected at localities upstream and downstream of a sewage treatment plant (STP). The sites were separated by a weir preventing fish migration. Pharmaceutical number and concentrations differed significantly between sites. Antibiotics and antidepressants were found at the highest concentrations at both localities. Though fish condition and overall parasite abundance did not differ between sites, there was a significant difference in parasite community composition. A higher abundance of monogenean ectoparasites, along with a lower abundance of endoparasites, was observed at the downstream locality. The adverse effect of pharmaceutical load on ecto- and endoparasitic species on brown trout was further confirmed at the individual level using multivariate analysis. Both the number and concentration of pharmaceuticals in fish tissues reflected their high incidence in the environment, confirming the ability of trout to bioaccumulate pharmaceuticals. This could have important consequences on fish health, particularly in small streams where STP effluent represents a high proportion of stream flow.



中文翻译:

暴露在污水中的褐鳟鱼中的药物污染物,寄生虫负荷和健康状况之间的关联

由于其广泛使用,药物已成为水生环境的重要污染物。药物和寄生虫可单独或通过相互作用影响目标生物体的免疫,生理和行为。在这项研究中,我们的相关药物浓度,在鳟(寄生虫感染和条件褐鳟米。法里奥)收集在污水处理厂(STP)上游和下游的地方。这些地点被堰堰隔开,防止鱼类迁移。站点之间的药物数量和浓度差异显着。在两个地方都发现了最高浓度的抗生素和抗抑郁药。尽管不同地点的鱼类状况和总体寄生虫丰度没有差异,但寄生虫群落组成存在显着差异。在下游地区观察到单基因外寄生虫的丰度较高,而内寄生虫的丰度较低。使用多变量分析在个体水平上进一步证实了药物负荷对褐鳟鳟的外寄生物和内寄生物种类的不利影响。鱼组织中药物的数量和浓度都反映了它们在环境中的高发病率,证实了鳟鱼具有生物蓄积性药物的能力。这可能对鱼类健康产生重要影响,特别是在小溪中,STP废水占溪流的大部分。

更新日期:2020-09-15
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