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首页> 外文期刊>Limnology >Studies on the aquatic oligochaete fauna in Lake Biwa, central Japan. IV. Faunal characteristics in the attached lakes (naiko)
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Studies on the aquatic oligochaete fauna in Lake Biwa, central Japan. IV. Faunal characteristics in the attached lakes (naiko)

机译：日本中部琵琶湖水生低聚类动物的研究。 IV。附属湖泊的动物特征（奈科）

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摘要

Surveys for macroinvertebrates occurring in 20 small attached lakes (naiko) adjacent to Lake Biwa, central Japan, conducted in 2001–2002 yielded 44 taxa of aquatic oligochaetes (Annelida, Clitellata). Descriptions and taxonomic remarks are provided for nine species: Aulophorus furcatus, A. tonkinensis, A. flabelliger, Pristina biserrata, P. proboscidea, Ilyodrilus templetoni, Allonais pectinata, Stylaria fossularis, and Dero dorsalis; the former six species of these are new to Japan. Stylaria fossularis is regarded as a distinct species, distinguished from the congener S. lacustris, on the basis of prostomium morphology and geographical distribution. No distinctive oligochaete fauna can be seen in the individual naiko, but as a collective body they maintain a rich fauna. This fauna was richer in naidines, while poorer in other groups of oligochaetes than those in Lake Biwa, and basically can be regarded as an extension of the fauna of littoral Lake Biwa. Epiphytic oligochaetes were more diverse and more abundant in the naiko than those in littoral Lake Biwa, probably because of higher temperatures, denser aquatic vegetation, and higher primary production. Summer oligochaete assemblages in the naiko were predominated by Stylaria fossularis and include several species characteristic of subtropical and tropical Asia, suggesting a close relationship to the fauna of the Indo-Malayan zoogeographical subregion.
机译：在2001-2002年间对日本中部琵琶湖附近的20个小附着湖泊（奈科）中发生的大型无脊椎动物进行了调查，得出了44种水生寡头类动物（Annelida，Clitellata）。提供了九种的描述和分类学说明：Alolophorus furcatus，A。tonkinensis，A。flabelliger，Pristina biserrata，P。proboscidea，Ilyodrilus templetoni，Allonais pectinata，Stylaria fossularis和Dero dorsalis；其中的前六个物种是日本的新物种。根据pro的形态和地理分布，小针针茅被认为是一种不同于同种S. lacustris的物种。在单个奈科子中看不到独特的寡头类动物，但作为一个集体，它们维持着丰富的动物。该动物区系的萘含量较高，而其他类别的寡聚动物区系的含量则比琵琶湖的差，并且基本上可以认为是沿海琵琶湖的动物的延伸。奈科岛的附生寡足类动物比沿海琵琶湖的附生寡足类动物更加多样化和丰富，这可能是因为温度更高，水生植物密度更高以及初级生产力更高。奈科（Naiko）的夏季寡聚类群主要由短吻针（Stylaria fossularis）占据，并且包括亚热带和热带亚洲的几种特征，这表明它们与印度-马来亚动物地理子区域的动物群关系密切。

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