The effect of centrifugation and the prostatic fluid addition were evaluated on the physical characteristics of the cryopreserved canine epydidimal spermatozoa. In the first experiment, the effect of centrifugation was analysed. The samples without centrifugation showed 26.7±21.2% of total motility (TM), 21.2±20.1% of progressive motility (PM), and 2.2±1.3 of intensity of movement (I). In addition, the samples after centrifugation showed 23.9±17.9% of TM, 20.6±17.4% of PM, and 2.2±1 of I. The mean time of samples duration, at least with 10% of total motility, was 165±21.2min without centrifugation and 77.5±63.6min with centrifugation during the thermal resistance test. It suggests a better spermatic longevity in samples without centrifugation. In the second experiment, the effect of the prostatic fluid addition was evaluated. The samples cryopreserved without prostatic fluid showed 13.3±13.1%, 10.9±11.4%, and 2.1±1.2% of TM, PM, and I, respectively. Furthermore, the samples with prostatic fluid showed 14.1±12.6%, 12.2±11.6%, and 2.2±1.3% of TM, PM, and I, respectively. These data support that centrifugation and 10% of prostatic fluid addition does not induce any effect on the physical characteristics of canine epydidimal spermatozoa cryopreserved.
dog; cryopreservation; epydidimal spermatozoa
