Effect of water flow on incubation eggs of Acipenser persicus
Subject Areas : New Technologies in Aquaculture Development
Keywords: Acipenser persicus, Keywords: Incubation, Water flow,
Abstract :
Abstract[1] To preserve the diversity of sturgeon species and maintain their number, a great deal of attention has been paid to artificial propagation in recent years. One of the most important points in propagation is the environmental condition. In this study, the effects of water flow on the incubation of the eggs of Acipenser persicus were investigated. Four water speeds (2.4, 3.4, 4.4, 5.4 lit/min) were examined. These speeds were arranged with zigzag boards in yoshchenco incubator. 1000 g eggs were transferred to each tray. For each speed, 4 trays were selected. First number of eggs in one gram before and after fertilizing was determined. Then percentage of fertilization at the 2nd division stage was determined, 80-84-82-75%. After 4 days the eggs hatched. Hatch percentage was determined. With speed 2.4 fungus percentage was higher and hatch percentage lower. 3.4 lit/min is the best speed because of the highest number of larva, and this speed is longer than others. 4.4 lit/min was lower and finally in 5.4 lit /min all of the eggs were lost because of high speed. *Corresponding Authors; Email: maryamtam@yahoo.com
_||_