First report of black-heart disease in Kumamoto oyster Crassostrea sikamea spat caused by Polydora lingshuiensis in China
文献类型： 外文期刊
作者： Ye, Ling-Tong 1 ; Wu, Lin 1 ; Wang, Jiang-Yong 1 ; Li, Qiong-Zhen 5 ; Guan, Jun-Liang 5 ; Luo, Bang 5 ;
作者机构： 1.Chinese Acad Fishery Sci, Minist Agr & Rural Affairs, Key Lab Aquat Prod Proc, Guangzhou 510300, Guangdong, Peoples R China
2.Chinese Acad Fishery Sci, Minist Agr & Rural Affairs, Key Lab South China Sea Fishery Resources Exploit, Guangzhou 510300, Guangdong, Peoples R China
3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Guangdong, Peoples R China
4.Shangbai Ocean Univ, Shanghai 201306, Peoples R China
5.Guangxi Acad Fishery Sci, Nanning 530021, Peoples R China
关键词： Black-heart disease; Crassostrea sikamea; Oyster spat; Polydorid
期刊名称：DISEASES OF AQUATIC ORGANISMS （ 影响因子：1.802； 五年影响因子：2.148 ）
ISSN： 0177-5103
年卷期： 2019 年 133 卷 3 期
页码：
收录情况： SCI
摘要： A black-heart disease caused by polydorid infestation is reported for the first time in Kumamoto oyster Crassostrea sikamea Amemiya, 1928 spat in a pond at Beihai city, Guangxi province, China, with a prevalence of 100% and a cumulative mortality rate of 50% within 2 mo. In heavily infected oyster spat, blisters extended toward the center of the inner shell surface, around the adductor muscle scar area to form a large black area occupying approximately 50% of the area of the inner shell surface. Morphological analysis identified the pathogen as Polydora lingshuiensis Ye et al., 2015, which was reconfirmed by comparison of its corresponding 18S rRNA and mitochondrial CO1 gene sequences with those in the GenBank database. The mean abundance of mud blisters was significantly higher in live spat than in dead spat, suggesting that P. lingshuiensis preferentially infests live oyster spat. Additionally, P. lingshuiensis larvae were detected in the inlet near the dam, which suggests that the source of P. lingshuiensis larvae infecting the spat may be larvae entering the ponds through the water current from the sea.
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