The aim of the current study is to investigate whether silver catfish (Rhamdia quelen) individuals exposed to commercial formulation of the chlorantraniliprole insecticide used in rice crops present changes in biochemical parameters. Fifty-four (54) silver catfish individuals were distributed in six units per tank (n = 6/repetition; triplicate/treatment) and subjected to the following treatments: T1—control, without insecticide; T2 (0.02 µg/L of insecticide) and T3 (0.20 µg/L of insecticide). Exposure time lasted 24 or 96 h, and it was followed by 96 h recovery in pesticide-free water. Results have indicated biochemical changes in cortisol, glucose, lactate and plasma protein levels, as well as few ionic changes in animals’ gills during the exposure and recovery periods. Chlorantraniliprole incidence in water resulted in some biochemical changes in silver catfish specimens’ plasma and gills throughout the acute exposure protocol (sub-lethal dose). Thus, chlorantraniliprole insecticide has caused osmoregulatory and/or biochemical imbalance in the investigated species under the herein adopted laboratory conditions; these changes did not get back to normal levels even after specimens were left to recover for 96 h in clean water.

本研究的目的是调查银鲶（Rhamdia quelen) 暴露于用于水稻作物的氯虫苯甲酰胺杀虫剂的商业配方的个体会出现生化参数的变化。五十四 (54) 只银鲶鱼个体分布在每个水箱的六个单位中（n = 6/重复；三次/处理）并进行以下处理：T1-对照，无杀虫剂；T2（0.02 µg/L 杀虫剂）和 T3（0.20 µg/L 杀虫剂）。暴露时间持续 24 或 96 小时，然后在无农药水中恢复 96 小时。结果表明，在暴露和恢复期间，皮质醇、葡萄糖、乳酸和血浆蛋白水平发生了生化变化，动物鳃中的离子变化很少。在整个急性暴露方案（亚致死剂量）中，水中的氯虫苯甲酰胺发生率导致银鲶鱼标本的血浆和鳃发生一些生化变化。因此，在本文采用的实验室条件下，氯虫苯甲酰胺杀虫剂在所研究的物种中引起了渗透调节和/或生化失衡；即使将样本在干净的水中放置 96 小时后，这些变化也没有恢复到正常水平。