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学科主题: Oceanography
题名: Studies on rickettsia-like organism (RLO) disease of tropical marine pearl oyster - Epidemiological investigation of RLO disease in juvenile populations of maricultured Pinctada maxima
作者: Wu, XZ ; Li, DF ; Pan, JP ; Jiang, JB
通讯作者: wuxz@zju.edu.cn
关键词: Pinctada maxima ; rickettsia-like organism ; epidemiology ; juvenile population
刊名: ACTA OCEANOLOGICA SINICA
发表日期: 2003
卷: 22, 期:3, 页:421-435
收录类别: sci
部门归属: Zhejiang Univ, Coll Anim Sci, Hangzhou 310029, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China; Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Peoples R China
项目归属: 海洋生物
摘要: The death which occurred in juvenile population was a severe problem in the course of Pinctada maxima artificial culture. With the methods of field investigation, histological study and statistic analyses, the epidemiological study was carried out on the disease and death in juvenile populations of Pinctada maxima in the Xinying Pearl Oyster Mariculture Farm of Lingao County (for the A, B and C batches of cultured juveniles hanged in the sea) and the Xincun Pearl Oyster Mariculture Farm of Lingshui County (for the D batch of cultured juvenile hanged in the pond), Hainan Province from November 1993 to April 1995. The results show that the deaths which occurred in juvenile populations of Pinctada maxima presented an outbreak pattern. The peak of mortality rates, in general, occurred in 4-to 6-month old pearl oyster juveniles, and the mortality rates gradully declined with the extention of pearl oyster age after culturing 8 months. The correlation between the mortality rates of juvenile populations and mean body lengths of juvenile populations show that the mortality rate become higher under 4 cm of mean body lengths of juvenile population and become obvious declined over 5 cm of mean body lengths. The peak of mortality rate occurred in 1 similar to 3 cm of mean body lengths. The results of histological observation showed that rickettsia-like organism inclusions were common, histological widespread infective agent among every batches (A, B, C and D) of cultured juvenile populations. The mean severity indices (91) of rickettsia-like organism (RLO) infection were positively correlated with mortality rates of juvenile populations. After or within every peaks of RLO infection were all accompanied with the peaks of mortality rates of host populations and the mortality rates declined with decreased RLO infection. So the evidences of histological observation and epidemiology in this study indicated that rickettsia-like organism (RLO) may be as an important pathogenic organism of disease and death of cultured Pinctada maxima. In addition, a few ciliates were discovered only in part of batch A of cultured juvenile population. The mortality rates in juvenile populations were not correlated with the weekly mean temperature and salinity of sea water.
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WOS记录号: WOS:000185880700008
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/3932
Appears in Collections:海洋生物_期刊论文

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Recommended Citation:
Wu, XZ; Li, DF; Pan, JP; Jiang, JB.Studies on rickettsia-like organism (RLO) disease of tropical marine pearl oyster - Epidemiological investigation of RLO disease in juvenile populations of maricultured Pinctada maxima,ACTA OCEANOLOGICA SINICA,2003,22(3):421-435
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