Abstract
The aquatic environment is becoming increasingly contaminated with pharmaceuticals. Salicylic acid (SA), which can be used individually or appear as a degradation product of the widely used acetylsalicylic acid was chosen for testing. Juvenile zebrafish Danio rerio were subjected to OECD test No. 215 (fish, juvenile growth test) with salicylic acid concentrations of 0.004; 0.04; 0.4; 4 and 40mg/L. Specific growth rate (SGR), histological changes, and parameters of oxidative stress were evaluated. SA had no effects on histological changes, SGR, glutathione reductase, and lipid peroxidation. Increased catalytic activity of GPx was found at 0.04mg/L compared to control, increased catalytic activity of catalase was found at 0.04 and 4mg/L compared to control, and increased catalytic activity of glutathione-S-transferase was found at 0.004 and 0.04mg/L compared to control (P<0.05). Juvenile zebrafish turned out to be relatively insensitive to both environmentally relevant (0.004mg/L) and higher concentrations of salicylic acid.
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