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This paper studied the impacts of different dose ultraviolet irradiation (254 nm, UVC) on the sperm motility and longevity of Acipenser baerii. Ultraviolet irradiation had significant impacts on the sperm motility, its fast motion time, and longevity. With the increasing dose of ultraviolet irradiation, the sperm motility decreased rapidly first, increased rapidly then, and decreased rapidly again. The sperm fast motion time had the similar variation trend as the sperm motility, but the sperm longevity kept decreasing with increasing dose of ultraviolet irradiation. When the ultraviolet irradiation dose increased to 288 mJ·cm-2, the sperm fast motion disappeared; when the ultraviolet irradiation dose increased up to 324 mJ·cm-2, the sperm had no motility and died. According to the "Hertwig effect", the optimum ultraviolet irradiation dose for inactivating A. baerii sperm was 216 mJ·cm-2. [ABSTRACT FROM AUTHOR]

This paper studied the effects of different storage medium (coelomic fluid, Hepes solution, and modified Ringer's solution), temperature (4 °C and 16°C), and duration (4 h, 8 h, 16 h, and 24 h) on the short?term storage of Siberian sturgeon (Acipenser baerii) eggs. The results showed that storage medium, temperature, and duration all had significant effects on the fertilization rate, hatching success, and malformation of newly hatched larvae (P<0.05). With the increase of storage duration, the fertilization and hatching rates decreased, while the malformation rate of hatched larvae increased. The A. baerii eggs stored at 16 °C had higher fertilization, hatching, and malformation rates but shorter holding time than those stored at 4 °C. The optimal conditions for the short-term storage of A. baerii eggs were Hepes solution prepared according to the biochemical composition of A. baerii coelomic fluid, 16 °C, and 4 h, under which, 86.36% fertilization rate, 94.74% hatching rate, and zero malformation would be obtained. [ABSTRACT FROM AUTHOR]