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首页> 外文期刊>Parasitology >Branchiobdellidan infestation on endangered white-clawed crayfish (Austropotamobius pallipes) in the UK
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Branchiobdellidan infestation on endangered white-clawed crayfish (Austropotamobius pallipes) in the UK

机译：在英国濒临灭绝的白爪小龙虾（Austropotamobius pallipes）上的Branchiobdellidan感染

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摘要

Branchiobdellidans or crayfish worms are clitellate annelids and ectosymbionts of freshwater crayfish. An investigation of branchiobdellidan infestation was undertaken in a population of endangered white-clawed crayfish (Austropotamobius pallipes) in the river Aire, UK. Thirty two percent of animals were infested either by the adult parasite or their cocoons (n=107). Parasite burden increased with host size, but did not differ with sex. Observations of crayfish gill tissue revealed a strong positive relationship between melanization of filaments and parasite prevalence and burden. Taxonomic identification revealed that 1 species of branchiobdellidan was present, Branchiobdella astaci. The first sequences were generated for this species and phylogenetically analysed alongside published sequences for 5 other branchiobdellidan species in Europe. The position of B. astaci within the genus Branchiobdella was confirmed, and it was found to cluster as a sister group to B. parasita.
机译：io枝小龙虾或小龙虾蠕虫是淡水小龙虾的带状小环虾和外生共生体。在英国的艾尔河上，对一群濒临灭绝的白爪小龙虾（Austropotamobius pallipes）进行了调查，研究了支线虫的侵染。 32％的动物被成年寄生虫或其茧侵染（n = 107）。寄生虫负担随宿主大小而增加，但随性别而变化。对小龙虾tissue组织的观察表明，细丝的黑色素化与寄生虫患病率和负担之间有很强的正相关关系。分类学鉴定显示，存在1种分支孢子虫，即Astaci分支孢子。产生了该物种的第一个序列，并与已发表的欧洲其他5个分支io形物种的序列进行了系统发育分析。证实了葡萄球菌在Branchiobdella属中的位置，并发现它是寄生虫双生芽孢杆菌的姐妹群。

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