Effect of Different Levels Factors of pH on the Percentage of Hatching (HP) and Hatching Efficiency (HE) Cysts Artemia urmiana

The Fisheries Research Laboratory, University of Zabol to investigate the Effect of different levels factors of pH on the percentage of hatching (HP) and hatching efficiency (HE) cysts Artemia urmiana at five different pH (7, 7.5, 8, 8.3 and 9) were performed. Each treatment was replicated three times. During the experiment, all factors affecting hatching was fixed and the variable pH levels. After 24 hours of incubation system began, the number of nauplii and umbrella cysts forms and cysts were counted and the percentage of hatching capacity was calculated. Based on the results, the percentage of hatching ability of pH=8.3 was higher than other treatments and at hatching was observed at pH=9. Differences between treatments were very small and statistically not significant (P> 0.05). Generally, the pH is an important factor in the hatched Artemia urmiana cysts and for optimization of the pH must be kept constant at 8.3.