Imidacloprid Induced Alterations in Behavioral and Locomotory Activity of Fingerlings of Common Carp, <i>Cyprinus carpio</i>


  • Jitender Kumar Bhardwaj Reproductive Physiology Laboratory, Department of Zoology, Kurukshetra University, Kurukshetra – 136119, Haryana
  • Harkrishan Reproductive Physiology Laboratory, Department of Zoology, Kurukshetra University, Kurukshetra – 136119, Haryana
  • Anil K. Tyor Reproductive Physiology Laboratory, Department of Zoology, Kurukshetra University, Kurukshetra – 136119, Haryana



Behavior, <i>Cyprinus carpio</i>, Imidacloprid, Toxicity


Pesticide imidacloprid is extensively used in agriculture field to kill variety of insect pests, from where it enters into surrounding aquatic ecosystem and results into toxicity related outcomes on non-target species. The present study was planned to evaluate the sublethal toxic effects of pesticide imidacloprid on behavior and locomotory activity of fingerlings of Cyprinus carpio. Initially, the LC50 (48 hrs) was calculated for fertilized eggs of C. carpio by probit analysis and was reported as 78 ppm. Further, the fingerlings of C. carpio were exposed to three different sublethal concentrations i.e. 7.8 ppm, 15.6 ppm and 23.4 ppm of imidacloprid along with control for 21 days and behavior of fish was supervised at regular intervals on days 2, 4, 7, 15 and 21. The control fish behaved normally but treated fishes demonstrated abnormal behavior like hyper excites, restless, loss of equilibrium, hyper activity, erratic swimming with jerky movements, excess mucus secretion, reduced skin pigmentation and loss of response to touch. Significant disruptions were also recorded in operculum beat frequency, surfacing movement and tail beat frequencies. All these outcomes are due to neurotoxic nature of imidacloprid as it blocks the receptor for neurotransmitter acetylcholine.


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How to Cite

Kumar Bhardwaj, J., Harkrishan, ., & Tyor, A. K. (2022). Imidacloprid Induced Alterations in Behavioral and Locomotory Activity of Fingerlings of Common Carp, <i>Cyprinus carpio</i>. Toxicology International, 27(3&amp;4), 158–167.



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