Assessment of ecology shrimp culture ponds in Gwatar Determi

At the present research four farms, supply and drainage channels were assessed in phase Cl shrimp culture sight or Gwatr from June It) November For this purpose, physical and chemical factors were measured include temperature salinity , demand oxygen and pH twice just one day and nitrate nitrite ammonia silicate phosphate , turbidity and total suspended solid once just one day in a week sampling was carried out as fallow biometric or shrimps every week plankton twice a month , macrobentoz , grain size and TOM monthly. The results obtained from biometrics factors showed that final weight were (12.03 18.65 gr) as well as the survival rate was (26.6 90.35) on the farms. The maximum final product and minimum was 2696 772 kg/h respectively. Based on amount of stoking survival and the factors of management, the result of physical and chemical factors indicated that salinity total suspended solid and turbidity were not the optimum range. Preserving this three factors have the paramount importance in our area. One way analys of variance chemical and physical' factors have showed significant difference between the days of culture and also salinity, demand oxygen and temperature showed 'significant difference between morning and afternoon (pSO.05). In this research 84 general phytoplankton were identified that diatom was dominant 9 Groups zooplankton were identified that their major percentage of groups were copepod and rotifers respectively. Benthos density was very poor . Abundance and diversity of benthic was very low in ponds and dominant group of macrobenthose was Mysidae. Usually the grain sizes of the bottom were sandy - loom * TOM of bottom was increased and acidity was decreased after harvesting compared to before irrigation. The factors of management inducing perpetration pond , quality 01' post laree , stocking , exchange water airing and feed of Shrimp of' ponds compared and the results shows that farm 2 was the best one .

Iranian Fisheries Science Research Institute

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