Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Poland, 13 Akademicka Str, 20-950 Lublin, Poland.
Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Poland, 13 Akademicka Str, 20-950 Lublin, Poland.
Chemosphere. 2019 Feb;216:805-811. doi: 10.1016/j.chemosphere.2018.10.192. Epub 2018 Oct 29.
λ-cyhalotrin is a pyrethroid pesticide used for protection of crops against various insect pests. Knowledge on behavioural and physiological responses of non-target organisms such as cladocerans is very limited. Daphnia is a sensitive organism commonly used in determination of ecotoxicological risk for various substances introduced to aquatic environment, however the main experimental endpoints used such as mortality or immobilisation may not be sufficient to evaluate subtle alterations in zooplankton. The aim of the present study was to evaluate swimming behaviour and physiological parameters of Daphnia magna exposed to λ-cyhalothrin (Karate Zeon 050 CS) at concentrations of 0.05, 0.5, 5 and 50 μg L for 2, 24 and 48 h. The results showed that λ-cyhalothrin affected D. magna swimming behaviour inducing a concentration-dependent inhibition of swimming track density, speed and turning ability. Depression of physiological parameters such as heart rate and thoracic limb activity was also noted. The results suggest that in natural conditions swimming behaviour and physiological endpoints of D. magna may be disturbed by environmental concentrations of λ-cyhalothrin leading to ecological consequences.
λ-氯氰菊酯是一种拟除虫菊酯类农药，用于保护作物免受各种害虫的侵害。关于非靶标生物（如枝角类）的行为和生理反应的知识非常有限。水蚤是一种敏感的生物，通常用于确定引入水生环境的各种物质的生态毒理学风险，但主要使用的实验终点，如死亡率或固定化，可能不足以评估浮游动物的细微变化。本研究旨在评估 Daphnia magna 在 λ-氯氰菊酯（Karate Zeon 050 CS）浓度为 0.05、0.5、5 和 50μg/L 下暴露 2、24 和 48 h 时的游泳行为和生理参数。结果表明，λ-氯氰菊酯影响了 D. magna 的游泳行为，导致游泳轨迹密度、速度和转弯能力的浓度依赖性抑制。还注意到心率和胸肢活动等生理参数的下降。结果表明，在自然条件下，D. magna 的游泳行为和生理终点可能会被环境浓度的 λ-氯氰菊酯干扰，从而产生生态后果。
