Utilization of Chemical material for mitigation of Cochlodinium polykrikoides bloom and their impact on the Litopenaeus vannamei shrimp

To identify the safe chemical substance against red tide in coastal waters wetlands such as Litopenaeus vannamei shrimp ponds, concentration effects of 0.01 mg/l, 0.04 mg/l, 0.4 mg/l, 1 mg/l and 1 gr/l Magnesium Hydroxide, Poly Aluminum Chloride (PAC), Aluminum Sulfate, Sodium Hypochlorite, Calcium Carbonate, Ferrous Sulfate, Starch on Laboratory cultures of Cochlodinium polykrikoides (100000 cell/l) and Litopenaeus vannamei have been studied in Iranian Shrimp research center. Cochlodinium polykrikoides were cultured under a cool white fluorescent light of 2000 lux intensity with a 12:12 h light: dark cycle. Temperature and salinity were controlled 28 °C and of 30 g/l (ppt), respectively.
Finding show that, all concentration of above substance, completely disintegrated of cultured Cochlodinium polykrikoides. Also except 1 g/l Sodium Hypochlorite (96h LC50), in other concentrations of studied substances, there weren’t seen shrimp mortality after 96h. Among studied substance, starch have limit effects on the shrimp health and environment also it is used as a carbon source for biofloc production in shrimp ponds; therefore it can be suitable for controlling of Cochlodinium polykrikoides in shrimp farms.