Genetic Polymorphism and Differentiation of Populations of Sterlet Acipenser ruthenus (Acipenseridae) in the Lower Irtysh and Middle Ob Basins

IF 0.8 4区 生物学 Q4 MARINE & FRESHWATER BIOLOGY Inland Water Biology Pub Date : 2024-09-19 DOI:10.1134/s1995082924700263
G. I. Volosnikov, O. N. Zhigileva, A. A. Stafeeva
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Abstract

This article presents data on the polymorphism of intermicrosatellite sequences in the sterlet Acipenser ruthenus of the lower reaches of the Irtysh River and the middle reaches of the Ob River. We have assessed the intra- and interpopulation variability and genetic differentiation of A. ruthenus and revealed a high ISSR polymorphism in the species from the central part of the Ob-Irtysh basin. The proportion of polymorphic amplicons is 0.966, genetic diversity is 0.355, and the average number of alleles per locus is 1.97. The highest polymorphism is typical for the sterlet from the Tobol River at the confluence with the Irtysh River. The genetic differentiation between the sterlet groups of the Irtysh and Ob rivers is well pronounced, the interpopulation component accounts for 42% of variability (Gst = 0.42), and the gene flow is limited (Nm = 0.67). The sterlet groups inhabiting the Lower Irtysh from the mouth of the Tobol River to the mouth of the Konda River do not differ genetically and form one population (Gst = 0.08–0.12, Nm = 3.76–5.55). The sterlet from the Irtysh River within the Vagay region is genetically different from the other Irtysh samples (Gst = 0.22, Nm = 1.68) and belongs to a different population group. The differentiation between samples of sterlet from the Ob basin is higher than between samples from the Irtysh basin. Groups of sterlet from the Ob River and the Yuganskaya Ob canal are genetically different (Gst = 0.30, Nm = 1.19) and form various subpopulations. Spawning migrations, as well as confinement to wintering pits, play a decisive role in the formation of the sterlet population structure in the studied part of the distribution area. The sterlet population groups that are identified should be considered separate units of environmental and economic management.

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下额尔齐斯河流域和中奥布河流域鲟鱼(鲟鱼科)种群的遗传多态性和分化
摘要 本文介绍了关于额尔齐斯河下游和鄂毕河中游鲟鱼Acipenser ruthenus的微卫星间序列多态性的数据。我们评估了鲁氏鲟种群内和种群间的变异性和遗传分化,发现奥布江-额尔齐斯河流域中部的鲁氏鲟具有较高的 ISSR 多态性。多态性扩增子的比例为 0.966,遗传多样性为 0.355,每个位点的平均等位基因数为 1.97。在与额尔齐斯河交汇处的托博尔河中,梭鱼的多态性最高。额尔齐斯河和鄂毕河的笛鲷种群之间的遗传分化非常明显,种群间成分占变异的 42%(Gst = 0.42),基因流动有限(Nm = 0.67)。栖息在额尔齐斯河下游从托博尔河河口到孔达河口的濑尿鱼群体在基因上没有差异,形成一个种群(Gst = 0.08-0.12,Nm = 3.76-5.55)。瓦盖(Vagay)地区内的额尔齐斯河(Irtysh River)的贝类与额尔齐斯河的其他贝类在基因上有所不同(Gst = 0.22,Nm = 1.68),属于不同的种群。与额尔齐斯河流域的样本相比,鄂毕河流域的样本之间的差异更大。鄂毕河和尤甘斯卡亚鄂毕河运河的乌塘鳢群体在基因上存在差异(Gst = 0.30,Nm = 1.19),并形成不同的亚群。产卵洄游以及在越冬池越冬,对所研究分布区的濑尿鱼种群结构的形成起着决定性作用。已确定的笛鲷种群应被视为环境和经济管理的独立单元。
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来源期刊
Inland Water Biology
Inland Water Biology 生物-海洋与淡水生物学
CiteScore
1.30
自引率
55.60%
发文量
87
审稿时长
6-12 weeks
期刊介绍: Inland Water Biology publishes thematic reviews and original papers devoted to flora and fauna in waterbodies, biodiversity of hydrobionts, biology, morphology, systematics, ecology, ethology, ecological physiology and biochemistry of aquatic organisms, patterns of biological cycle, structure and functioning of aquatic ecosystems, anthropogenic and uncontrolled natural impacts on aquatic organisms and ecosystems, invasion of nonindigenous species into ecosystems and their ecology, methods of hydrobiological and ichthyological studies.
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