Abstract—

The morphological variability of nine characters in six samples of Siberian taimen Hucho taimen from the Amur River was studied. The differences in the level of fluctuating asymmetry of fish from different tributaries are small, which indicates the similarity of the conditions of embryonic and early postembryonic development; significant differences between the samples were noted only in six cases. The maximum fluctuations in the coefficient of variation are characteristic for the number of postorbital bones and channels of the seismosensory system on the 1^st postorbital bone; the minimum, for the number of soft rays in the pectoral fins and channels of the seismosensory system on the preopercular bones. The largest sum of the variation coefficients values for individual characteristics differs in the sample from the Bikin River; the smallest, the Limuri River. These difference positively correlates with the length and area of ​​the basin of these tributaries. A regular decline in the mean values in the fish sampled at increasing distance from the mouth of the Amur River concerns only the number of postorbital bones. Clustering according to the mean values ​​of the features, revealed that the samples form three clusters: (1) the rivers Bol’shaya Ussurka and Tyrma (2^nd order tributaries, the farthest from the Amur mouth), (2) the Limuri River (the least distant from the Amur mouth), 3) the rivers Anyui, Khor and Bikin (geographically close populations). Revealed features may indicate the similarity of the conditions of early development and the likelihood of gene exchange between the last three groups.

中文翻译：

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阿穆尔河西伯利亚虎门虎尾虎（虎科）的变异性

摘要-

研究了来自阿穆尔河的六个西伯利亚虎门虎丘虎门样品中九个字符的形态变异。来自不同支流的鱼的波动不对称程度差异很小，这表明胚胎和早期胚胎发育条件的相似性；仅在六种情况下，样本之间存在显着差异。变异系数的最大波动是1^日地震感应系统的眶后骨骼和通道数量的特征眶后骨 最小的是在手术前骨骼上的感官系统的胸鳍和通道中柔和射线的数量。各个特征的最大变异系数值之和与Bikin河的样本不同。最小的Limuri河。这些差异与这些支流盆地的长度和面积成正相关。在距阿穆尔河河口越来越远的地方采样的鱼的平均值的定期下降仅涉及眶后骨骼的数量。根据这些特征的平均值聚类，发现该样品形成三个簇：（1）河流Bol'shaya Ussurka和特尔马（2^次阶支流，距阿穆尔河口最远），（2）利穆里河（距阿穆尔河口最远），3）安义河，霍尔河和比金河（地理上较近的人口）。揭示的特征可能表明早期发育条件的相似性，以及最后三组之间基因交换的可能性。