“…Antioxidant molecules, such as ascorbic acid (vitamin C), catalase, glutathione and cysteine, may reduce the impact of oxidative stress and thus improve quality of thawed sperm, which have been tested in vitro and in vivo, on human, bovine, ram, rabbit, horse and boar sperm (Chatterjee & Gagnon, ; Großfeld et al., ; Maxwell & Stojanov, ; Vernet, Aitken, & Drevet, ) with inconsistent results. Available data on fish are scarce (Lahnsteiner, Mansour, & Kunz, ; Martinez‐Paramoa et al., ; Ogretmen, Inanan, & Ozturk, ; Ubilla & Valdebenito, ). Our previous work demonstrated that cryopreservation resulted in significant osmotic and oxidative stress in common carp Cyprinus carpio spermatozoa (Li & Li et al., ).…”