In the study, we assessed how acute changes in water temperature and dissolved ammonia concentration can affect the swimming behavior pattern of rainbow trout (Oncorhynchus mykiss). The behavior was analyzed in three different stages: 1) increase stage, (where temperature and ammonia concentration increase during this step, respectively); 2) unchanged stage, (where levels of both factors do not change during this stage); 3) reduction stage, (where ammonia concentration and temperature during this stage are reduced), respectively. The results showed that both factors significantly changed the swimming pattern of the rainbow trout. There were significant differences in swimming parameters (distance from the center, swimming speed, total movement and the average of angular changes of movement) of treated fish in the comparison between treatments, and with the control group. The changes in the swimming pattern of fish in response to physicochemical parameters of water were confirmed to be a good tool in ecotoxicological studies.

在这项研究中，我们评估了水温和溶解氨浓度的急剧变化如何影响虹鳟鱼的游泳行为模式 ( Oncorhynchus mykiss）。行为在三个不同阶段进行分析：1) 增加阶段，（在此步骤中温度和氨浓度分别增加）；2）不变的阶段，（在这个阶段两个因素的水平都没有变化）；3）还原阶段，（在此阶段氨浓度和温度降低），分别。结果表明，这两个因素都显着改变了虹鳟鱼的游泳模式。处理组与对照组的游泳参数（距中心的距离、游泳速度、总运动量和运动角度变化的平均值）存在显着差异。