Chronic Effects of Diazinon® Exposures Using Integrated Biomarker Responses in Freshwater Walking Catfish, Clarias batrachus

• Published in: Applied sciences Vol. 11; no. 22; p. 10902
• Main Authors: Saha, Shubhajit, Chukwuka, Azubuike V., Mukherjee, Dip, Patnaik, Lipika, Nayak, Susri, Dhara, Kishore, Saha, Nimai Chandra, Faggio, Caterina
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.11.2021
• Subjects: Aquatic environment; Biomarkers; Blood; Blood tests; Catfish; Chromatography; Chronic effects; Chronic exposure; chronic toxicity; Clarias batrachus; Condition factor; Contaminants; Correlation analysis; Damage assessment; Diazinon; Experiments; Exposure; Fish; Fish populations; Fungicides; Glucose; growth parameters; Growth rate; Health risks; hematological parameters; Hematology; Hemoglobin; Insecticides; Laboratories; Mass spectrometry; Organophosphates; Organophosphorus pesticides; pesticide; Pesticides; Pharmacodynamics; Pharmacokinetics; Proteins; Relativity; Scientific imaging; Serum proteins; Thyroxine; Toxicants; Toxicity; Water quality; United States > US; West Bengal India; India
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app112210902

Diazinon exposures have been linked to the onset of toxic pathways and adverse outcomes in aquatic species, but the ecological implications on model species are not widely emphasized. The objective of this study was to determine how the organophosphate pesticide diazinon affected hematological (hemoglobin, total red blood count, total white blood count, and mean corpuscular hemoglobin), growth (condition factor, hepatosomatic index, specific growth rate), biochemical (total serum glucose, total serum protein), and endocrine (growth hormone, tri-iodothyronine, and thyroxine) parameters in Clarias batrachus after chronic exposure. Diazinon was administered at predefined exposure doses (0.64 and 1.28 mg/L) and monitored at 15, 30, and 45 days into the investigation. Observation for most biomarkers revealed patterns of decreasing values with increasing toxicant concentration and exposure duration. Correlation analysis highlighted a significant inverse relationship between variables (mean corpuscular hemoglobin, condition factor, specific growth rate, tri-iodothyronine, thyroxine, and total serum protein) and elevated chronic diazinon exposure concentrations. The integrated indices (IBR and BRI) indexes were used to provide visual and understandable depictions of toxicity effects and emphasized the relativity of biomarkers in terms of sensitivity and magnitude or severity of responses under graded toxicant exposures. The significant damage reflected by evaluated parameters in diazinon exposure groups compared to control portends risks to the health of local fish populations, including Clarias batrachus in aquatic systems adjacent to agrarian landscapes.