Abstract

The values of the osmolality and the contents of sodium, potassium, as well as the contents of the total, free, and bound water fractions in blood serum, muscles, liver, and brain that are characteristic for fish in the sea and in rivers were determined for the far eastern big-scaled redfin, Tribolodon hakonensis. The osmolality associated with the content of inorganic ions (Osm_inorg) was the same in the internal environment (blood serum), in the muscles, liver, and brain of redfins caught in the sea at the gonad maturity stage IV. In fish caught in the sea in pre-spawning period (gonad maturity stage V) and in rivers after spawning (gonad maturity stage VI-II) or in wintering period (gonad maturity stage IV), Osm_inorg in muscles, liver, and brain was significantly lower than in the blood serum. To achieve osmotic equilibrium with the internal environment, the lack of electrolytes in body tissues was compensated by accumulation of organic osmolytes. Migration of the redfin from rivers to the sea was associated with a significant increase in Osm_inorg in the blood serum, by 9.4–18.7% on average. As an adaptation in response to this increase, muscle tissue cells increased the concentration of sodium and potassium, while liver and brain cells accumulated potassium.

中文翻译：

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1877 年，海洋和河流中远东大型红鳍赤鳍 Tribolodon hakonensis Günther（鲤形目：鲤科）的渗透和离子调节

摘要

海洋和河流中鱼类特有的渗透压和钠、钾含量以及血清、肌肉、肝脏和脑中的总水、游离水和结合水部分的含量为确定为远东大型红鳍金枪鱼Tribolodon hakonensis。与无机离子 (Osm _inorg )含量相关的渗透压在内部环境（血清）、肌肉、肝脏和大脑中的性腺成熟阶段 IV 捕获的海中的红鳍鱼中是相同的。在产卵前（性腺成熟阶段 V）和产卵后（性腺成熟阶段 VI-II）或越冬期（性腺成熟阶段 IV）的河流中捕获的鱼中，Osm _inorg在肌肉、肝脏和大脑中的含量显着低于在血清中的含量。为了与内部环境达到渗透平衡，身体组织中电解质的缺乏通过有机渗透物的积累来补偿。红鳍金枪鱼从河流到海洋的迁移与血清中 Osm _inorg的显着增加有关，平均增加 9.4-18.7%。作为对这种增加的一种适应，肌肉组织细胞增加了钠和钾的浓度，而肝脏和脑细胞则积累了钾。