Purpose

Analysis and comparison of the helminth assemblages in Antarctic rockcod Notothenia coriiceps collected near the UAS “Akademik Vernadsky” (Argentine Islands, West Antarctica) in 2002 and 2014–2015 were performed to characterise the parasite community and investigate the temporal changes in helminth assemblages and infection parameters.

Methods

All specimens of N. coriiceps (n = 194) were caught at depths of 10–30 m. Parasites (22,856 helminth specimens and 15,057 cysts) were collected manually and identified based on their morphology. Statistical analysis of the quantitative data was performed using the Quantitative Parasitology 3.0 (QP 3.0), Paleontological Statistics (PAST v. 3.1), and PRIMER 6 software.

Results

Twenty-seven species of four taxonomic groups were recorded: trematodes (8 species), cestodes (4), nematodes (5), and acanthocephalans (10). Helminth samples collected in 2002 and 2014–2015 showed a rather high similarity in species composition. The species richness was higher in the sample collected in 2014–2015, while the evenness and diversity in the two samples were similar. The dissimilarity between helminth infracommunities in the two samples appeared to be statistically significant. Larval cestodes Diphyllobotrium sp., the acanthocephalan Metacanthocephalus rennicki, and the trematode Neoleoburia antarctica were found to make the most significant impact on the dissimilarity.

Conclusions

The analysis of the composition and structure of helminth community in N. coriiceps revealed the changes that have happened during the last decade. At least some of the changes are attributed to the changes in marine ecosystems in Western Antarctica.

中文翻译：

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加林德斯岛（阿根廷群岛，南极西部）附近沿海水域南极黑石鳕、Notothenia coriiceps（Actinopterygii：Nototheniidae）的蠕虫组合：内寄生虫群落的时间变化

目的

对 2002 年和 2014-2015 年在 UAS “Akademik Vernadsky”（阿根廷群岛，西南极洲）附近采集的南极石鳕Notothenia coriiceps中的蠕虫组合进行分析和比较，以表征寄生虫群落并调查蠕虫组合和感染的时间变化参数。

方法

N. coriiceps ( n = 194) 的所有标本 均在 10-30 m 的深度捕获。人工收集寄生虫（22,856 个蠕虫标本和 15,057 个包囊）并根据其形态进行鉴定。使用定量寄生虫学 3.0 (QP 3.0)、古生物学统计 (PAST v. 3.1) 和 PRIMER 6 软件对定量数据进行统计分析。

结果

记录了四个分类群的 27 种：吸虫（8 种）、绦虫（4）、线虫（5）和棘头动物（10）。2002 年和 2014-2015 年收集的蠕虫样本在物种组成上显示出相当高的相似性。2014-2015年采集的样本物种丰富度较高，而两个样本的均匀度和多样性相似。两个样本中蠕虫群落之间的差异似乎具有统计学意义。发现幼虫绦虫Diphyllobotrium sp.、棘头动物 Metacanthocephalus rennicki和吸虫Neoleoburia antarctica对这种差异产生了最显着的影响。

结论

对N. coriiceps蠕虫群落组成和结构的分析揭示了过去十年中发生的变化。至少其中一些变化归因于南极洲西部海洋生态系统的变化。