Abstract

This study analyzes the histological peculiarities of the internal organs of the lake form of Mongolian grayling Thymallus brevirostris (Kessler, 1879) caught in the cold-water mountain Lake Hindiktig-Khol (Tuva Republic, Russia) in the summer. The maturation of the females starts at 4+ years; the peak of their spawning activity is observed at 5+. Males mature 1 year earlier than females. In summer, in the ovaries of mature females, the older generation of germ cells is represented by oocytes at the phase of the cytoplasm vacuolization; the younger generation of cells is represented by numerous previtellogenous oocytes. The peak of spermatogenesis is observed in the testes. Significant pathomorphological changes are revealed in the gill epithelium which inhibit the respiratory function. Weakly expressed liver congestion and moderate basophilia of hepatocytes both indicate normal conditions in this lake.

中文翻译：

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西伯利亚东部南部一个高山湖泊中蒙古河鳟Thymallus brevirostris的形态功能状况

摘要

本研究分析了蒙古河鳟Thymallus brevirostris湖形内脏的组织学特性。（凯斯勒，1879年）在夏天被困在冷水山区的欣迪克蒂格湖（俄罗斯图瓦共和国）上。雌性的成熟开始于4年以上。其产卵活性的峰值在5+处观察到。男性比女性成熟1年。夏季，在成年雌性卵巢中，较早一代的生殖细胞在细胞质空泡化阶段以卵母细胞为代表。许多年轻的玻璃体卵母细胞代表了年轻的细胞。在睾丸中观察到精子发生的高峰。the上皮显示出明显的病理形态学变化，抑制了呼吸功能。肝脏充血的弱表达和肝细胞的嗜碱性嗜碱性都表明该湖的正常状况。