Characteristics and morphology of sperm from Crossed Duroc boar at different frequencies of shelter time

This study aims to examine the characteristics and morphology of sperm from cross-bred Duroc boars with different shelter time frequencies. This research was conducted in Buahan Village, Payangan District, Gianyar Regency, Bali Province, Indonesia. This research was carried out for two months, using a completely randomized design (CRD), which consisted of three treatments, namely: sperm storage which was carried out every 2 days (P0), sperm storage which was carried out every 4 days (P1), and sperm storage which was carried out every 7 days (P0). Variables observed included sperm volume, viscosity, odor, color, pH, spermatozoa motility, spermatozoa concentration, spermatozoa viability, and spermatozoa morphology. The results showed that the semen volume P0 (165.33±11.02ml); P1 (254.33±10.02ml); and P2 (242.67±21.08ml) were not significantly different (P>0.05). The viscosity, color, odor and pH are in accordance with the Indonesian National Standard (SNI) regarding liquid boar sperm. Spermatozoa motility in treatments P1 and P2 was: 78.33±2.88% and 73.33±2.88% significantly different (P<0.05) from P0 (61.67±2.88 ml). The spermatozoa concentration at P1 and P2 was significantly (P<0.05) higher than at P0. Spermatozoa morphology (spermatozoa abnormalities) at P1 (4.23±1.06%) showed the lowest results compared to P0 (8.52±2.55%) and P2 (5.95±0.6%). From the results of this research, it can be concluded that sperm collection carried out every four days shows the best results in the characteristics and morphology of spermatozoa in cross-bred Duroc boars.