Abstract: The sperm motility of Siberian char （Salvelinus leucomaenis） was observed in the semen activated by activators water or BSS. The results showed that the rapid movement time of A and B degrees was 34.83±2.15 s and 36.70±3.26 s, respeetively. The life span of the spermatozoa was shown to be 120.26±5.75s when the semen activated by water and 117.45±4.33s when activated by BSS, with activating ratio of more than 98%. BSS was found to have a better performance on activating than water. There was a nega- tive correlation between sperm motility, activating ratio, life span and storage time at the water temperature of 4℃ and 15℃. The sperm preserved in 1 -2 h had better motility and quality without significant effect on artificial insemination.

Key words: Salvelinus leucomaenis, sperm motility, activator