Mohammad Monjezi Veisi‡, Khor Waiho§, Pierre William Froneman|Corresponding author: Mohammad Monjezi Veisi ( m.monjeziveisi@gmail.com ) © Mohammad Monjezi Veisi, Khor Waiho, Pierre William Froneman. This is an open access preprint distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Monjezi Veisi M, Waiho K, Froneman PW (2024) Neurophysiological responses of juvenile Sobaity seabream, Sparidentex hasta, exposed to different concentrations of selenium. ARPHA Preprints. https://doi.org/10.3897/arphapreprints.e120385 |  |
Juvenile Sparidentex hasta (mean length, 14.6 ± 1.7 cm, and mean weight, 87.4 ± 5.6 g) were subjected to waterborne selenium (Se) at concentrations of 0, 40, 80, 160, 320 and 400 µg L-1 for 4 weeks. The investigation of oxidative indicators showed a significant increase in the activity of liver and gill superoxide dismutase (SOD) and glutathione S-transferase (GST) after the period exposure. At the end of the test period, the highest Se exposure also resulted in a significant rise in glutathione (GSH) levels in the liver and gills. Following exposure to waterborne Se, catalase activity showed different patterns in fish organs: liver > brain > gills > kidney > muscle. In the investigation of neurotoxicity, waterborne Se exposure reduced AChE activity in the muscles and brain tissues. Additionally, waterborne Se exposure significantly elevated plasma and kidney lysozyme activity in non-specific immune responses. At high Se concentrations, peroxidase and anti-protease activities were reduced. These alterations in parameters can be considered as suitable indicators for evaluating Se toxicity in the aquatic ecosystem.