استخدام الجنس Cyclocypria كمنظف حيوي للمياه الملوثة ببكتريا Escherichia coli و Staphylococcus aurous

Abstract EN

In this study the Individuals of Ostracoda crustacean Cyclocypria were used as bioclaner of two sp ecies of bacteria namely Escherichia coli & Staphylococcus aurous, these bacteria have been introduced to an artificial aquatic environment with known number from pure cultures.

The aim was to check the predation efficiency and ecological role of Cyclocypria as biological cleaners.

The results showed that the predation rate was between 6× 106 and 7× 10 6 colony/ ml/ 3 days/ 10 crustacean in the first three days.

This rate increased remarkably in the 9th, 12th & 15th day from the beginning of the experiment and it was 10 × 10 6 and 15 × 10 6 respectively.

The final predation percentage was 99.48% for E.

coli and 99.35% for S .aurous.

This indicates the important role that Cyclocypria plays to control both bacterial sp ecies, which indicates the possibility using in the biological pollution control for these types of bacteria.

The results show that Cyclocypria is efficient biocleaner, and the relation between consumption and predation rate depends on several environmental and biological factors such as density of organisms, size of media and sp ecies protection.

There was a feedback sy stem between the prey and predator.