Extenders and Cryosolutions for Grumatã (Prochilodus Vimboides) Sperm Preservation

Abstract

BACKGROUND: Prochilodus vimboides populations are being reduced in rivers due to changes in their habitat, overfishing, urbanization, and pollution. OBJECTIVE: To evaluate the effect of sperm extender solutions for short-term storage and cryosolutions for freezing sperm of Prochilodus vimboides . MATERIALS AND METHODS:For short-term storage, the sperm was diluted in 0.9% NaCl, 1.2% NaCl, 5%glucose, 5% BTS ® , or 6% MIII ® . Sperm motility was evaluated after 0, 24, 48, and 72 h of short-term storage at 4-6ºC. For cryopreservation, sperm samples were diluted in the same extenders and factorially combined with three cryoprotectants (dimethylsulfoxide, methyl glycol, and ethylene glycol). After thawing, sperm motility and oxidative stress parameters were evaluated. RESULTS: Dilution of samples in BTS® preserved sperm motility >40% for up to 48 h. Samples cryopreserved in 5% glucose and methylglycol presented higher sperm motility, lower catalase, and lipid peroxidation activities.CONCLUSION: Prochilodus vimboides sperm can be cooled for up to 48 h in an extender solution of 5% BTS ® and cryopreserved in 5% glucose and methyl glycol.