SOME PHYSICO-CHEMICAL CHARACTERISTICS AND PHYTOPLANKTON ABUNDANCE IN SOME FISH FARMS SUPPLIED BY DIFFERENT WATER SOURCES IN SHARKIA GOVERNMENT

SOME PHYSICO-CHEMICAL CHARACTERISTICS AND PHYTOPLANKTON ABUNDANCE IN SOME FISH FARMS SUPPLIED BY DIFFERENT WATER SOURCES IN SHARKIA GOVERNMENT

S.A. El-Korashy¹; N.A. Ali²;

D.A. Al-Kenawy³ and I.M. Mousa².

¹Chemistry department, Faculty of Science, Suez Canal, University.

²Ecology department, Central Laboratory for Aquaculture Research, Sharkia, Egypt.

³The WorldFish Center, Egypt.Abbassa, Abu- Hammad, Sharkia. Egypt.

Abstract

This study was aimed at knowing the phytoplankton dynamics and the water quality of water in three different farms irrigated from three different sources of water with Nile fresh water for 1st farm, agriculture drain water for 2nd farm and sewage water drain for 3rd farm. The samples were collected during morning hours and were analyzed monthly for physical, chemical and biological parameters. The various physico-chemical parameters like water temperature, pH, dissolved Oxygen, electrical conductivity, Total dissolved solids, Total alkalinity, Phosphate, Nitrate, total hardness calcium hardness, Ammonia and water transparency were analyzed. Approximately the pH value was in the alkaline side in farm (1) and farm (2) and neutral in farm (3) during the study period. There was significant (P<0.05) difference among farms and months for all studied water parameters. Phytoplankton in the present study were represented by four groups Chlorophyceae, Cyanophyceae, Bacillariophyceae and Euglenophyceae, where Cyanorophyceac dominated over Chlorophyceae, Bacillariophyceae and Euglenophyceae in first farm but Chlorophyceae dominated over other groups in the second farm and Bacillariophyceae was dominated in the third farm.