First record of the endoparasitic isopod Portunion maenadis (Giard, 1886) (Epicaridea: Entoniscidae) in shore crabs in the Wadden Sea and a review of its distribution in Europe
First record of the endoparasitic isopod Portunion maenadis (Giard, 1886) (Epicaridea: Entoniscidae) in shore crabs in the Wadden Sea and a review of its distribution in Europe
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瓦登海岸蟹内寄生等足类动物Portunion maenadis (Giard, 1886)（Epicaridea: Entoniscidae）的首次记录及其在欧洲的分布回顾
DOI：
10.1007/s12526-019-01012-3
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发表时间：
2019
影响因子：
1.6
通讯作者：
D. Thieltges
中科院分区：
文献类型：
--
作者：
Annika Cornelius;A. Waser;C. Buschbaum;D. Thieltges
关于海洋寄生虫的分布和丰度的知识仍然有限，即使是那些发生在相对较好研究的具有高度生态重要性的宿主物种上的海洋寄生虫。在这里，我们报道了欧洲海岸蟹（Carcinus maenasL.，1758）在瓦登海，并提供了一个定量审查的寄生虫的分布在欧洲的基础上出版的文献和生物多样性数据库记录。我们的新记录填补了P的分配缺口。maenadis之前在葡萄牙和法国的南部观测与丹麦和瑞典的北方观测之间。另外的文献调查表明，P. Maenadis不是很常见，只在分散的地方发生，在宿主蟹种群中的感染率通常远低于10%。然而，我们在2018年11月在瓦登海南部的研究中观察到的45%的患病率表明，也可能发生更高的患病率。由于成虫以宿主的血淋巴为食，它们可能会对宿主的能量预算产生影响。此外，虫害导致形态变化的形式雌性化的雄性螃蟹（即更广泛的pleon，细长的爪子，鼓包甲壳），我们观察到在几个人。有了这个新的记录和文献综述，我们希望激发未来的研究，这种有趣的寄生虫物种的分布，以及对海岸蟹宿主的影响。
The knowledge on the distribution and abundance of marine parasites is still limited, even for those occurring on relatively well studied host species with high ecological importance. Here we report on the first record of the entoniscidPortunion maenadis(Giard, 1886) in European shore crabs (Carcinus maenasL., 1758) in the Wadden Sea and provide a quantitative review of the parasite’s distribution in Europe based on published literature and biodiversity database records. Our new record closes a distribution gap ofP. maenadisbetween previous southern observations in Portugal and France and northern occurrences in Denmark and Sweden. The additional literature survey suggests thatP. maenadisis not very common and only occurs at scattered localities with prevalence of infestations usually well below 10% in host crab populations. However, the 45% prevalence observed in our study in November 2018 in the southern Wadden Sea indicates that also higher prevalences can occur. As the adult parasites feed on their host’s hemolymph they are likely to have consequences for the host’s energy budgets. In addition, infestations lead to morphological changes in the form of feminisation of male crabs (i.e. broader pleon, slender claws, bulging carapace) which we observed in several individuals. With this new record and literature review, we hope to spark future research into the distribution of this intriguing parasite species as well as on the impacts of infestations on shore crab hosts.