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首页> 外文期刊>The Science of the Total Environment >Seasonal influence of parasitism on contamination patterns of the mud shrimp Upogebia cf. pusilla in an area of low pollution
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Seasonal influence of parasitism on contamination patterns of the mud shrimp Upogebia cf. pusilla in an area of low pollution

机译：寄生虫对泥虾污染状况的季节性影响

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Very few studies have characterized the concentrations of pollutants in bioturbating species. These species are considered as ecosystem engineers and characterizing stressors. such as contaminants, that impact them could lead to a better understanding of the functioning of ecosystems. In addition to contaminants, bioturbators are affected by a wide range of stressors, which can influence their physiological status and their ability to accumulate pollutants. Among these stressors, parasitism is of particular concern due to the ubiquity of parasites in natural environments and their influence on the fitness of their host. This study aims to assess the relationship between parasitism and metal accumulation in the bioturbating mud shrimp Upogebia cf. pusilla. A one-year seasonal survey was conducted in Arcachon Bay, France, with the aims of (1) characterizing the levels of metals in the mud shrimp and (2) evaluating the influence of two macroparasites (a bopyrid isopod and a trematode) on the variation of the metal content in mud shrimp. The bopyrid parasite castrates its female host and a particular attention has therefore been paid to the reproductive cycle of female mud shrimp by quantifying the expression of the vitellogenin gene that encodes the major yolk protein in female crustaceans. The levels of contaminants in mud shrimp appeared low compared to those reported in other crustaceans in areas of higher pollution. Even at these low contamination levels, we observed a significant impact by the bopyrid parasite that depends on season: bopyrid-infested organisms are generally more contaminated than their uninfested conspecifics except in summer when the opposite trend was observed. We suggest that the bopyrid indirectly interferes with the metal accumulation process by altering the reproductive capabilities of the mud shrimp. On the opposite, very low influence of the trematode parasite on the metal content of the host was found. (C) 2019 Elsevier B.V. All rights reserved.
机译：很少有研究描述生物扰动物种中污染物的浓度。这些物种被认为是生态系统工程师和特征性压力源。诸如污染物之类的污染物，可能会导致人们更好地了解生态系统的功能。除污染物外，生物扰动器还受到多种压力源的影响，这些压力源可能会影响其生理状态和累积污染物的能力。在这些压力源中，由于寄生虫在自然环境中无处不在及其对宿主健康的影响，因此特别需要关注寄生虫。本研究旨在评估生物扰动虾虾Upogebia中寄生虫与金属积累之间的关系。普苏拉。在法国阿卡雄湾进行了为期一年的季节性调查，目的是（1）表征泥虾中的金属含量，以及（2）评估两种大寄生虫（一种是py虫纲和一种线虫）对虾的影响。虾中金属含量的变化。吡虫啉寄生虫site割了它的雌性宿主，因此通过定量编码雌性甲壳类动物主要卵黄蛋白的卵黄蛋白原基因的表达，对雌性虾的繁殖周期给予了特别的关注。与其他甲壳类动物在高污染地区的报告相比，泥虾中的污染物含量似乎较低。即使在这些低污染水平下，我们仍会观察到取决于季节的吡虫啉寄生虫的重大影响：除夏季观察到相反的趋势外，被吡虫啉侵染的生物通常比未侵染的同种异生物更受污染。我们建议，草吡虫啉通过改变泥虾的繁殖能力间接干扰金属积累过程。相反，发现吸虫吸虫对宿主金属含量的影响很小。 （C）2019 Elsevier B.V.保留所有权利。

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