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根据线粒体基因和形态学识别了鱼冰鱼 (Champsocephalus gunnari) 的两个外寄生虫物种

Zhihong Zheng^1,2, Zukun Peng^1,2, Congcong Wang^1,2,3,4

¹College of Marine Living Resource Sciences and Management, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New City, Shanghai 201306, China.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

|October 27, 2025

概括

用显微镜和DNA测序识别了鱼冰鱼上的寄生虫copepods和吸血虫. 这项研究证实了吸血虫是Notobdella nototheniae,但确定了copepods是Parabrachiella merluccii,影响了渔业管理.

科学领域:

海洋生物学海洋生物学
寄生虫学的寄生虫学
渔业科学渔业科学

背景情况:

鱼冰鱼 (Champsocephalus gunnari) 在南大洋的生态和经济上是至关重要的.
寄生虫copepods和吸血虫是常见的外寄生虫影响冰鱼的健康和渔业的可持续性.
准确的寄生虫鉴定对于生态系统影响评估和渔业管理至关重要.

研究的目的:

使用形态和分子方法准确识别Champsocephalus gunnari上的外寄生虫.
为了解决分类学上的差异,在copepod识别.
提供支持冰鱼可持续渔业管理的数据.

主要方法:

从28个C.gunnari标本中对34个外寄生虫进行了形态检查.
线粒体细胞染色体c氧化酶I (CO I) 基因测序用于分子鉴定.
使用最大概率方法进行基系学分析.

主要成果:

形态分析暂时确定了吸血虫为Notobdella nototheniae和copepods作为南极洲Eubrachiella.
通过COI测序证实了吸血虫是N. nototheniae (98.81%的相似性).
根据COI测序的推测,共类动物是Parabrachiella merluccii (81.97-82.25%的相似性),与最初的形态识别不同.

结论:

在分子数据的基础上,对copepods的形态鉴定为Eubrachiella antarctica被修改为Parabrachiella merluccii.
准确识别N.nototheniae和P.merluccii对于了解它们对C.gunnari.影响至关重要.
这项研究有助于为南洋冰鱼资源制定有效的渔业管理战略.

关键词:

南极洲的尤布拉基埃拉 (Eubrachiella antarctica) 是一个没有obdella没有otheniae.这就是COI基因.南大洋南大洋是南大洋.这是ectoparasite.

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