Comparative toxicological effects of the herbicide atrazine on fingerlings and juveniles of African catfish Clarias gariepinus (Burchell 1822)

Doherty V. F., . and Idowu Aneyo, . and Adeola Abdullahi, . and Owolabi Oluwatobi, . Comparative toxicological effects of the herbicide atrazine on fingerlings and juveniles of African catfish Clarias gariepinus (Burchell 1822). pp. 48-55. ISSN 0116-6514

This research was aimed at evaluating the toxic effects of atrazine a commonly used herbicide on acetylcholinesterase (ACHE) activity lipid peroxidation and testosterone levels in different growth stages of African catfish Clarias gariepinus (Burchell 1822). The acute and the chronic evaluations were conducted while activities of acetylcholinesterase lipid peroxidation and testosterone levels were determined using predetermined sub-lethal concentrations of the herbicide. The mean 96-h lethal concentration (LC50) of atrazine exposed to catfish fingerlings and juveniles were 0.350 mgL and 0.553 mg.L respectively. Acetylcholinesterase activity was higher in the brain of juveniles (25.0 mol.mL) exposed to the herbicide than that of the fingerlings (17.0 mol.mL) and a similar pattern was observed in the liver. Malondialdehyde was higher in the fingerlings (liver and brain) (2.7 and 2.0 mol.mL) exposed to the herbicide than the juveniles (1.8 mol.mL and 1.6 mol.mL). Testosterone was not detected in the serum of fingerlings exposed to atrazine herbicide. The results of this study elucidated potential biomarkers for monitoring fish health in rivers receiving runoffs of the herbicide atrazine and the risk of loss of fisheries productivity attributable to the anti-androgenic properties of the herbicide.

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Abstract

This research was aimed at evaluating the toxic effects of atrazine a commonly used herbicide on acetylcholinesterase (ACHE) activity lipid peroxidation and testosterone levels in different growth stages of African catfish Clarias gariepinus (Burchell 1822). The acute and the chronic evaluations were conducted while activities of acetylcholinesterase lipid peroxidation and testosterone levels were determined using predetermined sub-lethal concentrations of the herbicide. The mean 96-h lethal concentration (LC50) of atrazine exposed to catfish fingerlings and juveniles were 0.350 mgL and 0.553 mg.L respectively. Acetylcholinesterase activity was higher in the brain of juveniles (25.0 mol.mL) exposed to the herbicide than that of the fingerlings (17.0 mol.mL) and a similar pattern was observed in the liver. Malondialdehyde was higher in the fingerlings (liver and brain) (2.7 and 2.0 mol.mL) exposed to the herbicide than the juveniles (1.8 mol.mL and 1.6 mol.mL). Testosterone was not detected in the serum of fingerlings exposed to atrazine herbicide. The results of this study elucidated potential biomarkers for monitoring fish health in rivers receiving runoffs of the herbicide atrazine and the risk of loss of fisheries productivity attributable to the anti-androgenic properties of the herbicide.

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Item Type:	Article
AGROVOC Term:	Clarias
AGROVOC Term:	Clarias gariepinus
AGROVOC Term:	Freshwater catfish
AGROVOC Term:	Juveniles
AGROVOC Term:	Fingerlings
AGROVOC Term:	Toxicology
AGROVOC Term:	Agrochemicals
AGROVOC Term:	Herbicides
AGROVOC Term:	Atrazine
AGROVOC Term:	Lipid peroxidation
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8113

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