From April to May, 2003, a study was carried out on the paralytic shellfish poison (PSP) contents in the oysters in 15 important maricultural waters along Guangdong Coast.

• 2003年4月和5月对广东沿海15个重要渔业养殖水域牡蛎进行了麻痹性贝类毒素(PSP)的调查,结果表明:调查期间牡蛎体PSP毒性较低,检测结果均未检出。