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张文润,喀迪尔丁.艾尔肯,容梦婕,岳城,郝翠兰.2021.两种 科鱼类鳃部寄生的普氏趋 虫 形态描述及系统发育分析.动物学杂志,56(1):88-99.
两种 科鱼类鳃部寄生的普氏趋 虫 形态描述及系统发育分析
Morphological Description and Phylogeny of the Monogenean Ligictaluridus pricei Parasitizing Gills in Two Species of Catfish Family
投稿时间:2020-04-10  修订日期:2021-01-05
DOI:10.13859/j.cjz.202101011
中文关键词:  斑点叉尾  云斑  普氏趋 虫  形态鉴定  系统发育
英文关键词:Ictalurus punctatus  I. nebulosus  Ligictaluridus pricei  Morphology  Phylogenetic
基金项目:国家自然科学基金项目(No. 31860738,31960737)
作者单位E-mail
张文润 新疆农业大学动物医学学院 乌鲁木齐 830052 1661688060@qq.com 
喀迪尔丁.艾尔肯 新疆农业大学动物医学学院 乌鲁木齐 830052 kadirden_a@163.com 
容梦婕 新疆农业大学动物医学学院 乌鲁木齐 830052 1549822257@qq.com 
岳城 新疆农业大学动物医学学院 乌鲁木齐 830052 yuechengxnd@aliyun.com 
郝翠兰 新疆农业大学动物医学学院 乌鲁木齐 830052 haocuilan@126.com 
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中文摘要:
      2018年9月至2019年10月,对新疆乌鲁木齐市区及巴楚县的鱼类进行寄生虫病原调查过程中,在斑点叉尾鮰(Ictalurus punctatus)和云斑 (I. nebulosus)鳃部发现有单殖吸虫寄生,两种鱼所寄生的虫种形态基本一致,仅连接片形态稍有差异,通过形态学鉴定为锚首虫科(Ancyrocephalidae)趋 虫属(Ligictaluridus)的普氏趋 虫(L. pricei)。为验证形态鉴定的准确性,扩增了寄生虫的28S rDNA序列,并进行了系统发育分析。结果显示,两种鱼所寄生的单殖吸虫与普氏趋 虫的相似度均达98%以上,在系统进化树中紧密聚为一支,置信度均为100;同时,两种虫与普氏趋 虫间的遗传距离数值接近于零,表现出了很高的相似度和亲缘关系。因此根据形态特征和系统发育分析,确定这两种鱼感染的是同一种寄生虫。研究结果可为新疆人工养殖 科鱼类的病害防治提供依据。
英文摘要:
      During the investigation into parasitic pathogens of fishes in urban areas of Urumqi and Bachu County, Xinjiang, from September 2018 to October 2019, monogenean parasites were found in the gills of both Ictalurus punctatus and I. nebulosus. The morphology of the parasitic species was basically the same between the two fish species, except for the bar morphology. The parasites were tentatively identified as Ligictaluridus pricei of Ancyrocephalidae, Ligictaluridus (Fig. 1, 2). To verify the the species identified by morphology, molecular identification was performed with the construction of a phylogenetic tree. The 28S rDNA sequences of parasites from the two fish species were amplified, and the phylogenetic tree and genetic distance matrix were constructed after sequence comparison. The similarity between the parasites from the two species and L. pricei was above 98%, and the phylogenetic tree showed that they closely clustered into a same branch with a confidence of 100 (Fig. 4, 5). The same genetic distance between the parasite from the two species and L. pricei was close to zero, showing a high degree of similarity and kinship (Table 3). Therefore, according to the morphological characteristics and phylogenetic analysis, it was determined that these two fishes were infected with the same parasite. The findings of the study can provide a basis for the disease control of artificially cultured catfish in Xinjiang region.
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