深圳海域养殖牡蛎卫生质量状况(II)——农药、微生物及麻痹性贝毒的含量与评价

The sanitary quality of farmed oyster from Shenzhen seaboard (II) —assessment on pesticide, microbe and paralytic shellfish poison

为了了解深圳海域养殖牡蛎体内的卫生质量状况,我们于2002年1月～2004年2月对该海域养殖牡蛎体内的污染物水平进行了检测,结果显示六六六(BHC)为ND(未检出)～0.100mg?Kg-1湿重,DDT为0.004～0.255mg·Kg-1湿重,细菌总数为ND～9.3104Ind·g-1,大肠菌群为ND～5.6104Ind·(100g)-1,PSP为ND～34礸·(100g)-1,副溶血性弧菌沙井和后海的近江牡蛎检测结果为阳性,其余站位未检出。参照GB18406.4-2001《农产品安全质量无公害水产品安全要求》,深圳海域养殖牡蛎的六六六、DDT、细菌总数和PSP完全符合要求,沙井和后海的近江牡蛎副溶血性弧菌超标,所有站位的大肠菌群均存在超标。综合重金属的检测结果发现,所有站位的牡蛎均有多个污染物超标,卫生质量欠佳,珠江口和深圳湾的近江牡蛎较大亚湾和大鹏湾的长牡蛎和褶牡蛎卫生质量更差。

In order to study the sanitary quality of farmed oyster from Shenzhen seaboard ,the contents of pollutants within it were detected from Jan.2002 to Feb. 2004. The results showed that the concentrations of pollutants were benzene hexachloride(BHC) ND(Could not be detected) ～ 0.100 mg· Kg-1 wet weight,DDT0.004～0.255 mgKg-1 wet weight,the total bacteria ND～9.3104 Ind·g-1,coliforms bacteria ND ～ 5.6104 Ind(100g)-1,and PSP ND～34 礸·(100g)-1, and only the Vibrio parahaemolyticus of Crassostrea rivularis from Shajing and Houhai could be detected out.Comparing with the safety standard of non-social effects of pollution on aquatic product(GB18406.4-2001),we found that BHC,DDT,the total bacteria and PSP satisfied the criterion,while the Vibrio parahaemolyticus of Crassostrea rivularis from Shajing and Houhai exceeded and all sites had samples that were beyond the standard of coliforms bacteria.Combined with the contents of heavy metals,we found that the oyster of Shenzhen seaboard was generally polluted by different matters and the sanitary quality was not good.The sanitary quality of Crassostrea rivularis from Zhujiang Mouth and Shenzhen Bay was worse than that of Crassostrea gigas and Crassostrea plicatula from Daya Bay and Dapeng Bay.