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참굴 채묘 부진 원인 구명에 관한 연구 - 병리 발생학적 조사를 통한 참굴 모패의 건강도와 난 및유생의 생존율과의 상관관계 구명 -
박미선(Mi Seon Park),류호영(Ho Young Lyu),이태식(Tae Seek Lee) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.1
Infectioa rates of oyster ovariaa parasite, Marteiliodes chungmuemsis and prodactivity of the oyster shellstock infected with the parasite were investigated at the main seed collection areas in the soathern coast of Korea where the extreme bad seed collection of oyster occurred in 1992 and 1993 to evaluate the cause of the bad seed collection. Additionally, the bacterial flora of the sea water sud oyster larva were examined to identify the shellfish larva pathogenic bacteria like Vibrio sp. and Pseudomonas sp. In August 1992 to September 1993, infection rate of oyster ovarian parasite, M. chungmuensis at Tongyong, Kyongsangnam province, and Yosu, Chollanam proviace where the bad seed collection occurred, were 11.8∼100% and 14.3∼100%, respectively. Bat the parasite was not detected in the shellstock collected at Daechon, Chungchongnam province. While a virus-like particle was identified in the cytoplasm of the egg infected by the parasite. The parasite infected egg was not able to fertilize completely. Uninfected egg in the gonad contaminated by the parasite could be able to fertilize but showed an abnormal development till D-shaped larva and then, died of necrosis after D-shaped larva. And some larva developed from low lipid content egg could not develop to the spat and died after the early umbo stage. The predominant bacteria in the oyster larva collected at bad seed collection areas were Pseudomonas sp. and Pseudomonas like bacteria and the occupancy rates were 53.3∼87.1%.
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