Abstract—

Rheoreaction and concentration of thyroid hormones in blood of juvenile rainbow trout Oncorhynchus mykiss is studied during starvation (12 days). It is found that starvation predominantly stimulates downstream migration of fish and decreases the concentration of total triiodothyronine in the blood. The concentration of total triiodothyronine decreases to a lesser degree in fish moving predominantly upstream. The concentrations of free triiodothyronine and total thyroxine do not change during starvation. The level of total triiodothyronine in fish’s blood is an indicator of their migratory activity.

中文翻译：

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饥饿期幼体虹鳟Onkihynchus mykiss血液中流变反应性和甲状腺激素浓度的变化

摘要-

在饥饿期间（12天）研究了虹鳟鱼Onmyhynchus mykiss血液中甲状腺激素的流变反应和浓度。发现饥饿主要刺激鱼的下游迁移，并降低血液中总三碘甲状腺素的浓度。在主要向上游移动的鱼类中，总三碘甲状腺素的浓度降低的程度较小。饥饿期间游离三碘甲状腺素和总甲状腺素的浓度不变。鱼血中总三碘甲状腺氨酸的水平是其迁移活动的指标。