Accumulation and detoxification of paralytic shellfish poison(PSP) in hard clam Meretrix meretrix

There were two stages in the experiment,accumulation and detoxification.Accumulation PSP by hard clam Meretrix meretrix achieved by feeding clams certain amount paralytic shellfish poison(PSP) every day and detecting PSP periodically.The detoxification was determined by method of "inner discharge and out purification".We found that the clam had a low ability to accumulate PSP.It reached to 884 μg /100g after exposed to toxic A.tamarense for 15 d and the toxins in the viscera were higher than in other muscles,accounting to 77.4%～89.1%.The amounts of PSP decreased in three groups with the elimination rates of the control group 30.1%,ozone purified group 32.8%,group of inner discharge and out purification 47.2% during detoxification.This research showed that "inner discharge and out purification" could accelerate PSP detoxification.