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The European eel may tolerate multiple infections at a low biological cost

机译：欧洲鳗鱼可以以较低的生物学成本耐受多种感染

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Most animals are concurrently infected with multiple parasites, and interactions among them may influence both disease dynamics and host fitness. However, the sublethal costs of parasite infections are difficult to measure and the effects of concomitant infections with multiple parasite species on individual physiology and fitness are poorly described for wild hosts. To understand the costs of co-infection, we investigated the relationships among 189 European eel (Anguilla anguilla) from Mar Menor, parasites (richness and intensity) and eel's health status' (fluctuant asymmetry, splenic somatic index and the scaled mass index) by partial least squares regression. We found a positive relationship with 44% of the health status variance explained by parasites. Contracaecum sp. (Nematoda: Anisakidae) was the strongest predictor variable (44.72%) followed by Bucephalus anguillae (Platyhelminthes: Bucephalidae), (29.26%), considered the two most relevant parasites in the analysis. Subsequently, 15.67 and 12.01% of the response variables block were explained by parasite richness and Deropristis inflata (Platyhelminthes: Deropristiidae), respectively. Thus, the presence of multiple parasitic exposures with little effect on condition, strongly suggests that eels from Mar Menor tolerate multiparasitism.
机译：大多数动物同时感染多种寄生虫，它们之间的相互作用可能会影响疾病动态和宿主健康。然而，寄生虫感染的亚致死成本难以衡量，野生宿主对多种寄生虫并发感染对个体生理和适应性的影响描述得很差。为了了解共感染的成本，我们通过以下方法调查了来自Mar Menor的189头欧洲鳗鱼（鳗鱼），寄生虫（丰富度和强度）和鳗鱼健康状况（波动不对称，脾体细胞指数和标度质量指数）之间的关系。偏最小二乘回归。我们发现与寄生虫解释的44％的健康状况差异呈正相关。 tra菜（Nematoda：Anisakidae）是最强的预测变量（44.72％），其次是鳗头Bucephalus anguillae（Platyhelminthes：Bucephalidae）（29.26％），被认为是分析中两个最相关的寄生虫。随后，分别用寄生虫的丰富度和膨化De（Propyhelminthes：Deropristiidae）解释了15.67％和12.01％的反应变量区。因此，多种寄生物暴露对病情的影响很小，这强烈表明来自Mar Menor的鳗鱼可以耐受多种寄生虫。

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