IMPACTS OF AQUACULTURE ON COASTAL ECOSYSTEM IN HORMOZGAN PROVINCE (TIAB AND SAYEH KHOSH AREAS)

The effects of shrimp culture on the adjacent water bodies over a crop cycle period were evaluated in the year 2005 by studying the water quality of inlet and outlet in two locations within Sayeh Khosh and Tiab area. A one way ANOVA was used for statistical analysis of the data comprising homogeneous subsets and multiple comparisons. We evaluated the variation of 10 parameters including temperature, pH, salinity, dissolved oxygen, BOD5, total ammonia, nitrate, inorganic phosphorous, chlorophyll a, and total suspended solids (TSS).The variations were in the range 23-37.4oC for temperature, 8.12-8.36 for pH, 38-48ppt for salinity, 5.6-7.8mg/l for dissolved oxygen, 0.2-5.7mg/1 for BOD5, 0.002-0.045mg/l for total ammonia, 0.026-0.275 mm/l for nitrate, 0.001-0.042mg/1 for inorganic phosphorous, 0.11-4.15 mg/1 for chlorophylla and 33-174.2 mg/1 for total suspended solids. The result of this study showed that salinity, BOD5, nitrate, total ammonium, inorganic phosphorous and total suspended solids in the outlet effluents and the receiving water in Tiab (stations 1,2) and Sayeh Khosh (stations 5,6) were higher than other sites (3, 4, 7 and 8) and statistical analysis of variance showed a significant difference between the sites (P<0.05). The concentration of chlorophylla showed a decrease in the outlet effluents and receiving.waters in Tiab and Sayeh Khosh areas.