一般影響
海灣州際海洋漁業委員會(2003)報告指出，褐菜蛤(Perna perna)會使導航浮標沈沒，影響航運安全(Hicks and Tunnel, 1995)。Barbera-Sanchez 等人(2004)記載委內瑞拉爆發嚴重的麻痺性貝類中毒(PSP)事件。該地區的褐菜蛤，麻痺性貝類毒素含量超過國際安全標準。
地點特有的影響：Guayacan (Venezuela) 
傳播疾病: A severe outbreak of Paralytic Shellfish Poisoning (PSP) occurred in Manzanillo and Guayacan, northwestern coast of Margarita Island, Venezuela, between August and October 1991. A bloom of dinoflagellates including Prorocentrum gracile, Gymnodinium catenatum and Alexandrium tamarense seemed to be responsible for this outbreak. Levels of PSP toxins in mussels (Perna perna) exceeded the international safety limit of saxitoxin, 80 mug STX/100 g meat (Barbera-Sanchez et al 2004). Manzanillo (Venezuela) (Venezuela)
傳播疾病: A severe outbreak of Paralytic Shellfish Poisoning (PSP) occurred in Manzanillo and Guayacan, northwestern coast of Margarita Island, Venezuela, between August and October 1991. A bloom of dinoflagellates including Prorocentrum gracile, Gymnodinium catenatum and Alexandrium tamarense seemed to be responsible for this outbreak. Levels of PSP toxins in mussels (Perna perna) exceeded the international safety limit of saxitoxin, 80 mug STX/100 g meat (Barbera-Sanchez et al 2004).
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