Department of Aquaculture, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Basij Sq., 4913815739, Gorgan, Iran.
Department of Aquatic production and Exploitation, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Basij Sq., 4913815739, Gorgan, Iran.
Environ Toxicol Pharmacol. 2021 Aug;86:103648. doi: 10.1016/j.etap.2021.103648. Epub 2021 Mar 31.
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性变化如何影响虹鳟（Oncorhynchus mykiss）的游泳行为模式。行为在三个不同阶段进行分析：1）增加阶段（在此阶段，温度和氨浓度分别增加）；2）不变阶段（在此阶段，两个因素的水平都没有变化）；3）减少阶段（在此阶段，氨浓度和温度降低）。结果表明，这两个因素都显著改变了虹鳟的游泳模式。在处理组之间以及与对照组相比，处理后的鱼的游泳参数（距中心的距离、游泳速度、总运动和运动角度变化的平均值）存在显著差异。鱼类对水理化参数的游泳模式变化被证实是生态毒理学研究的一个很好的工具。
