Categories
vol-31CHEMICAL CHARACTERISTICS OF EL MAX FISH
FARM PONDS
AIDA B.TADROS, HODA A. EL SAYED HEMAIDA AND TAREK O. SAID
Marine Chemistry Lab-Marine Environmental Division,
National Institute of Oceanography and Fisheries, Alexandria, Egypt.
Key words: Physicochemical, nutrients, pesticides, El Max farm, water.
ABSTRACT
El Max fish farm is located at 15 km westward of Alexandria city. It contains 14 basins,
seven basins has been selected for physicochemical studies of their waters beside three
input sources of the fish farm; El Moghazy, El Khandek and El Beer. Most of the water
farm basins are of alkaline behaviour and highly oxygenated. Ammonia and silicate
concentrations are very high in the input sources of the fish farm as well as in the selected
water basins (> 100 mole/l). The other nutrient salts are fluctuated depending on the
concentrations in El Moghazy and El Khandek areas. Both areas are characterized by high
oxidizable organic matter, low oxygen content and pH values lower than 8. Total
hexachlorocyclohexanes (HCHs) of concentrations 11.28-44.48 ng/l, present no risk to
marine organisms. On the other hand ,the total DDTs exceed the limited acceptable levels
markedly in El Moghazy basin. The total PCBs concentrations were ranged from 4.65-
313.09 ng/l with an average of 82.28 ng/l, and higher at basins 6, 8 and 11.
