Effect of pH on hatching and survival of larvae of common carp Cyprinus carpio (Linnaeus, 1758)‎

الملخص EN

Artificial hatching of common carp eggs was fulfilled in Marine Sciences Center hatchery.

Fertilized eggs was taken from hatchery and was distributed in seven concentrations of pH (4.5, 5.5, 6.5, 7, 8.5, 9, 9.5).

The results show that segmentation of eggs begin in each concentration especially in the critical concentrations (4.5, 5.5, 9 and 9.5).

Then the eyes were formed and other organs respectively.

After 48 hours hatching occurs by 85 % in all concentrations.

Hatched larvae were distributed on the same concentrations, survival rates of larvae in concentrations ( 4.5, 5.5, 6.5, 7, 8.5, 9 , 9.5) were 50 %, 54 %, 60 %, 95 %, 90 %, 20 %, 0 respectively after 24 hours from hatching.