@article{article_269446, title={Effects of mercury on some enzymes in the gill and muscle tissues of oreochromis niloticus}, journal={Ege Journal of Fisheries and Aquatic Sciences}, volume={34}, pages={133–137}, year={2017}, DOI={10.12714/egejfas.2017.34.2.03}, author={Firidin, Gülbin}, keywords={Oreochromis niloticus,solungaç,kas,civa,enzim}, abstract={<div style="border-top:solid 1pt;border-left:none;border-bottom:solid 1pt;border-right:none;padding:1pt 0cm 1pt 0cm;"> <p class="MsoNormal" style="text-align:justify;border:none;padding:0cm;"> <span lang="en-us" style="font-size:8pt;font-family:’Arial Narrow’, sans-serif;" xml:lang="en-us">The toxic effects
of the metals on the aquatic ecosystems can be found by measuring enzyme
activities of fish tissues. This study aimed to analyze the results of mercury
(Hg) exposure on the change of the asetylcolinestrase (AChE), glutation
peroxidase (GPx) and glutamic piruvate transaminase (GPT) activities in gills
and muscles of <i>Oreochromis niloticus </i>
(Linnaeus, 1758). The fish were exposed to 0.1 and 0.01 ppm Hg for periods of 7
and 21 days. The enzyme activities in the tissues were determined by the use of
ultraviolet spectroscopy. The AChE activity decreased while the GPx activity
increased in both muscle and gills as a result to exposure to Hg in
experimental group when compared to the control group. The GPT activity in
gills were found to increase in the first 7 days of exposure and decreased
after the exposure of 21 days. The data obtained revealed that AChE, GPx and
GPT activities in the gill and muscle tissues of Oreochromis niloticus were
observed to change as a result of the exposures of both low and high mercury
concentrations. </span> </p> <p> </p> </div> <p> </p>}, number={2}, publisher={Ege Üniversitesi}