Rheoreaction of the downstream migrating smolts of the European river lamprey was studied in the experimental conditions at illuminations of day and night intensity. It was found that at the daytime the smolts are mostly dormant and if move downstream then in active-passive form (with the head against the stream, and their speed going beyond the velocity). This data is well within the findings on the night downstream migration of the smolts during the 24h period in natural conditions. Thus, the downstream migration of the smolts has an active form.

中文翻译：

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在各种照明条件下欧洲河南七叶树Lampetra fluviatilis（L.）下游移生mol的流变作用的实验研究

在白天和夜晚的光照条件下，在实验条件下研究了欧洲河七lamp鳗下游迁移s的流变反应。研究发现，白鲑在白天大部分时间都处于休眠状态，如果向下游移动，则会以主动-被动的方式出现（头部朝着溪流，其速度超过了速度）。这些数据完全是在自然条件下24小时内，这些小mol在夜间向下游迁移的结果。因此，这些鲑的下游迁移具有活性形式。