The effectiveness of using lipid- and water-soluble analogues of vitamin E as antioxidant protectors for cryopreservation of sperm of sterlet (<i>Acipenser ruthenus</i>) and Russian sturgeon (<i>Acipenser gueldenstaedtii</i>)

The aim of the research was to comparative study effectiveness synthetic antioxidants – lipid-soluble (butylated hydroxytoluene, BHT) and water–soluble (trolox) analogues vitamin E for cryopreservation Russian sturgeon sterlet sperm in presence modified Stein’s medium. ability phenolic reduce level lipid peroxidation sperm, beneficial effect on motility thawed has been shown. addition lipid- water-soluble a basic cryomedim increased fertilization rate cells about 10% compared control experiment. insignificant protective these presumably is explained by use cryogenic medium with additive toxic DMSO, therefore, it necessary develop new composition cryo-medium minimum concentration DMSO.