Cypermethrin induced respiratory and behavioural responses of the Cypermethrin induced respiratory and behavioural responses of the freshwater teleost
Year: 2009
Type: article
Abstract: A short term defi nitive test by the static renewal bioassay method was conducted to determine the acute toxicity (LC 50 ) of technical grade pyrethroid insecticide, cypermethrin (92.25%) in freshwater indigenous carp, Labeo rohita.Carp fi ngerlings were exposed to different concentrations (2.0 to 6.0 μg/L) of cypermethrin for 96 h.The acute toxicity value was found to be 4.0 μg/L and one fi fth of LC 50 (0.57μg/L) was selected for sub acute studies.Behavioural patterns and oxygen consumption were studied in lethal (1, 2, 3 and 4 d) and sub lethal concentrations (1, 5, 10 and 15 d).Carp in toxic media exhibited irregular, erratic and darting swimming movements, hyper excitability, loss of equilibrium and sinking to the bottom, which might be due to inactivation of (AChE) acetyl cholinesterase activity which results in excess accumulation of acetylcholine in the cholinergic synapses leading to hyperstimulation.Variation in oxygen consumption (1.289 to 17.409 %; 20.580 to 109.77%) was observed in both lethal and sub lethal concentrations of cypermethrin respectively.Alterations in oxygen consumption may be due to respiratory distress as a consequence of impairment in oxidative metabolism.Fish in the sublethal concentration were found under stress, but that was not fatal.
Source: Veterinarski arhiv
Institution: Karnatak University
Language: English
Subfield: Health, Toxicology and Mutagenesis
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
Funder: Karnatak University Dharwad
OpenAlex ID: W44333383