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¹ Central Fisheries Research Institute 61250 Yomra, Trabzon, Turkey
² The Southern Scientific Centre of the Russian Academy of Sciences, Rostov-on-Don, Russia DOI : 10.17693/yunusae.v2012i21909.235436 Viewed : 3479 - Downloaded : 1977 In this study, sperm quality of Russian sturgeon (Acipenser gueldenstaedtii Brandt, 1883) and effect of temperature on sperm motility and viability after diluting with fresh water studied. The sperm were collected from four males after 0.5 μg/kg surfagone injection. After sperm quality determined, diluted with fresh water and kept various temperatures from 4 to 24C°. The spermatozoa motility and viability were examined five minutes intervals until motionless stage. The motility and viability of Russian sturgeon spermatozoa decreases when the temperature is increased from 4 to 24°C. Motility was seen to in progress at the 14°C which is close to incubation degree of Russian sturgeon eggs until 28th minute and viability recorded as 5% percent at that time. The viability of spermatozoa was determined more than 50 percent at the 14°C, therefore Russian sturgeon sperm can be use fertilization until 8 min after activated with fresh water. Keywords : Sperm motility, Russian sturgeon, temperature, reproduction