Abstract

The number of circuli between annual scale rings of grayling Thymallus baicalensis Dybowski, 1874 sampled in the Yenisei River in the downstream section of the Krasnoyarsk Hydroelectric Power Station, which does not freeze in winter, have been investigated and compared with populations of grayling from large tributaries of the Yenisei River (Amyl, Kan, Nizhnyaya Tunguska, and Bolshaya Kheta). It has been shown that graylings inhabiting the Yenisei River have a significantly higher (1.5–2.0 times, p < 0.01) number of circuli in the second, third, and fourth annual rings of the scales than in the populations from the tributaries, which corresponds to a higher growth rate of the grayling population in the Yenisei River. An assumption is made about the transition of graylings inhabiting the Yenisei River channel in the lower reaches of the hydroelectric station to a sedentary lifestyle.

中文翻译：

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水文情势变化条件下贝加尔河鳟的生态特征

摘要

格雷林的年度规模环之间circuli数茴芩Dybowski，1874年在克拉斯诺亚尔斯克水电站，这冬天不结冰的下游段在叶尼塞河进行采样，进行了调查，并与大支流格雷林的人群相比，叶尼塞河（Amyl，Kan，Nizhnyaya Tunguska和Bolshaya Kheta）的河流。研究表明，在叶尼塞河中栖息的河鳟明显更高（1.5-2.0倍，p<0.01）规模的第二，第三和第四年环中的马戏数量大于支流人口中的马戏数量，这对应于叶尼塞河中河鳟种群的增长速度更高。假设居住在水力发电站下游叶尼塞河河道的河鳟过渡到久坐的生活方式。