Analysis of the characteristics of paralytic shellfish poison of shellfish from coastal waters of the Guangdong Province in spring 2005
WU Shi-wei1,ZENG Miao2,LU Da-peng1,LUO Yi-dan1,JIANG Tian-jiu3(1.South China Sea Environment Monitoring Center,SOA,Guangzhou 510300,China;2.Research Center of Hydrobiology,Jinan University,Guangzhou 510632,China;3.Research Center of Harmful Algae Blooms & Aquatic Environment Science,Jinan University,Guangzhou 510632,China)
In order to establish feasible and effective method for monitoring toxins of shellfish and serve relative research,investigation and studies of the distribution of shellfish toxins in the coastal waters of Guangdong Province was carried out under the financial support from the project of the science and technology plan of Guangdong Province.The aim of the study is to know the effected species and areas and the composition and concentrations of the toxins.27 sampling sites were selected covering the adjacent sea of Guangdong from east to west,including 12 key marine aquaculture zones.120 shellfishes of 35 species were sampled between March and May,2005.Samples of PSP toxins of shellfish were studied with Mouse bioassay.The results show that:(1)The detection ratio and content of the paralytic shellfish poison are both lower.Within 120 samples,PSP was detected in 13 samples and the detection ratio was 10.8%.The PSP concentration ranges from 152 to 198 MU·(100 g)-1 parenchyma.Among these samples,lethality of Kunming mouse within one hour is high for Scapharca troscheli in Beijin port(Dongping) and Crassostrea rivularis of Shenquan Port(Shenquan),but toxicity is a low.All the detected data are significantly lower than the state provisional criterion 80 μg STXeq·(100 g)-1 shellfish parenchyma [for KM mouse,it is about 423 MU·(100 g)-1],and the lower temperature of the seawater in springtime of 2005 was probably an important reason for this.(2)Contaminated shellfish species were less than that of the former years.Out of the 35 shellfish species only eight detected PSP,accounting for 22.8%.The detection ratio of PSP was higher in oysters,but lower in Meretrix meretrix Linnaeus and Perna viridis,and PSP was not detected in Chalmys nobilis.(3)Paralytic shellfish poisoning has a wide geographical distribution,almost covering the whole coastal waters of Guangdong.The highest concentration of PSP was detected in Beijin Port where 2 out of 6 samples found PSP.Among the 12 key thalassic aquafarms,PSP were detected in 8 aquafarms except for Honghai,Daya,Dapeng and Hailing Bays.Detection ratio of PSP accounts for 66.7%.PSP has been also detected in the regions what had not been detected previously and the relative issues are also discussed by.
【Fund】： 广东省科技计划资助项目(2004B33201003);; 国家海洋局海洋科学技术研究资助项目(国海计财字134);; 国家海洋局南海分局海洋科学技术局长基金资助项目(0215)
【CateGory Index】： X55
【CateGory Index】： X55