Physico-chemical properties of water in shrimp hatcheries of Choebdeh (Abadan), South Iran

For assessing management efficiency in shrimp hatcheries of Choebdeh (Abadan), we surveyed the physico-chemical properties of water in two culture periods during the years 2001-2002. Different physical and chemical factors were measured in hatcheries under Thai and Philippine management methods.
We measured factors such as salinity (17. 9-35. 3 ppt), BODS (6. 12-8. 72 ppm), DO (10. 02-13. 7 ppm), COD (4-98. 9 ppm), NH3 (0-811. 4 ppb), N02 (10-421 ppb), pH (8. 04 - 8. 68), Turbidity (1-33 NTU), Ca (400. 4-620. 6 ppm), Mg (1104-1968 ppm), total hardness (6000-9400 ppm) and water temperature (25. 4-32. 4 C) while no amount of SH2 was found in the water samples.
The results of this survey were compared with standard levels and safe ranges for aquaculture activities. Most factors were in standard range with only NH3 and N02 showing a slight excess in some cases. An ANOVA test showed significant differences in levels of oxygen and COD of the tanks at different sampling times.