Study on Marteilioides chungmuensis Comps et al., 1986 Parasite of the Pacific Oyster, Crassostrea gigas Thunberg
Study on Marteilioides chungmuensis Comps et al., 1986 Parasite of the Pacific Oyster, Crassostrea gigas Thunberg
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Marteilioides chungmuensis Comps 等人的研究，1986 太平洋牡蛎寄生虫，Crassostrea gigas Thunberg
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
S. Chun
中科院分区：
文献类型：
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作者：
M. Park;S. Chun
太平洋牡蛎（Crassostrea gigas）的卵巢寄生虫钟木氏牡蛎（Marteilioides chungmuensis）在太平洋牡蛎种的生产部门中已多次被观察到（Matsuzato等人，1977 ; Chun，1979）。本研究从1986年至1988年分别在朝鲜半岛南部、西部和东部沿海的花岛、Och 'n和新昌采集标本，对M. chungmuensis到太平洋牡蛎。还对受感染的牡蛎进行了超微结构研究，以便详细检查这种寄生虫的结构和系统位置。M. 1986年和1987年，在花岛和Och 'n牡蛎养殖场分别有5.3%和4.2%，6.7%和2.8%，而在新昌牡蛎养殖场则没有发现。M，.在花渡，从6月到11月，在Och 'n，从6月到10月，都发现了感染chungmuensis的牡蛎。从新昌移植到花岛的300只牡蛎中，有25只被M.忠木。部分异常虫卵感染M.在产卵期，中牟海蜇与正常的成熟卵一起从鳃中释放出来，其余的在产卵期后仍然坏死。已知最早的阶段包括一个干细胞或初级细胞，包括一个次级细胞，在次级细胞中发现卵圆形的单孢子体。在孢子形成过程中，第一个次级细胞通过外源出芽产生2或3个次级细胞，每个次级细胞在三级细胞分化（内生出芽）时进化成孢子体;然后，在年轻的孢子体中形成单孢子体。内裂包括每个孢子体分化出一个三细胞孢子。最外层的孢子细胞含有膜结合的嗜锇体，中间和内部，大多数孢子细胞含有高密度的胞质核糖体。本文还对M.中牟虫是目前已知的副粘虫纲中最简单的一种。
An ovarian parasite, Marteilioides chungmuensis of the Pacific oyster, Crassostrea gigas has been observed on several occasions in the Pacific sector of production of this oyster species(Matsuzato et al., 1977 ; Chun, 1979). This study was carried out on the specimens collected at Hwado, Och'n, and Sinchang respectively located the southern, western, and eastern coasts of Korean Peninsula from 1986 through 1988 to investigate M. chungmuensis to the Pacific oyster. Uitrastructural studies were also carried out on infected oysters, to allow detailed examination of the structure and consepuently the systematic position of this parasite. Infection rates of M. chungmuensis at Hwado and Och'n oyster farms were 5.3% and 4.2% each in 1986, 6.7% and 2.8% each in 1987, but they were not found at Sinchang oyster habitat. M,. chungmuensis-infected oysters were found from June to November at Hwado and from June to October at Och'n. Twenty five of three hundred oysters transplanted from Sinchang to Hwado were found infected with M. chungmuensis. Some abnormal eggs infected with M. chungmuensis are liberated through the gill together with normal mature eggs on the spawning and the rest remain necrotized after spawning season. The earliest known stages consist of a stem cell or primary cell, including a secondary cell in which ovoid haplosporosomes are found. During sporulation, 2 or 3 secondary are produced by exogenous budding from the first secondary cell and, each secondary cell evolves into a sporont upon the tertiary cell differentiation (enodogenous budding) ; then, haplosporosomes are formed in the young sporont. Internal cleavages involve the differentiation of one tricellular spore per sporont. The outermost spore cell contains membrane-bounded osmiophilic bodies : the middle and the inner, most spore cells contain high density cytoplasmic ribosomes. The mechanism of spore formation from the stem cell of M. chungmuensis is the simplest of the class Paramyxea known up to now.