the results of SOD supplementation are contradictory. Some of the available reports have shown that there is no positive influence of this enzyme on plasma membrane integrity in ram (100 U/mL) [39], brook trout (250 and 500 U/mL) [22], rhesus macaque (200 U/mL) [28], canine (100 U/ mL) [14] and equine sperm (200 U/mL) [4].