Abstract:

The algae which occur in fish production ponds is extremely important since they directly affect the properties of water quality such as colour, smell, taste, dissolved oxygen, turbidity (Boyd, 1982). Algal blooms in commercial fish production ponds have extensively been studied and blue-green algae are reported to be most nuisance in fish ponds (Brunson at al., 1994) and they play an important role not only with their property of growing very fast but also with their effects on aquatic environment and on other organisms in fish ponds (Sen and Sonmez, 2006). It has been recorded in many studies that blue-green algae give out various metabolic substances in water (Fogg, 1971;Sen and Sonmez, 2006).