Abstract

Variability of the first invasive population of C. fluminea (O.F. Müller, 1774) from the Volga basin is studied using the mitochondrial cytochrome c oxidase subunit I gene fragment (COI mtDNA), and morphological features of the shells are characterized. A comparison with C. fluminalis (O.F. Müller, 1774) from the Kura River basin is made in order to avoid errors in species identification. All analyzed individuals belong to the most widespread R morphological type. The only nucleotide sequence haplotype we found is identical to the widespread variant prevailing in the populations of Corbicula with R morphological type in Europe and also in America. There were mollusks of different shell size groups in the sample. Corbicula larvae were detected in qualitative zooplankton samples and in the gills of adults. Therefore, the studied population reproduces independently and may possibly become a source for further species expansion.

中文翻译：

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在伏尔加河流域归化的亚洲蛤Cor（Corbicula fluminea，OFMüller，1774年）的第一个入侵种群的形态和遗传特征

摘要

使用线粒体细胞色素C氧化酶亚基I基因片段（COI mtDNA）研究了伏尔加盆地第一批侵袭性梭状芽胞杆菌（OFMüller，1774）的变异性，并表征了壳的形态特征。为了避免物种鉴定中的错误，与库拉河流域的C. fluminalis（OFMüller，1774）进行了比较。所有分析的个体均属于最广泛的R形态类型。我们发现的唯一核苷酸序列单倍型与在欧洲以及在美国具有R形态类型的Corbicula种群中普遍存在的普遍变异相同。样品中有不同壳大小的软体动物。在定性浮游动物样本和成年the中检出了Corbicula幼虫。因此，所研究的种群独立繁殖，并有可能成为进一步物种扩展的来源。