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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1998.5
- 수록면
- 203 - 212 (10page)
이용수
초록· 키워드
오류제보하기
As seed production program is growing prosperously in various fishes in southern Korea, disease problems in larval and juvenile stages have emerged as a new research object. The following results were obtained from investigation about environmental factors related to mass mortalities of young Kinki red seabream, Pagrus major in process of artificial seedling production.
Total length of red seabream larvae hatched was 2.93㎜, and became 18.83~20.12㎜ at day 40. The first noticeable mortality of red seabream larvae (7.98~9.37㎜) occurred in 25~30 day-old fish with the survival rates of 59.8~60.3%. Thereafter the mortality of larvae decreased, survival rate was 20.5~25.45% in day 40.
After 20~30 days, the quality of pond water was bellow Ⅱ class. During the experimental period COD, PO₄-P, NO₂-N, NO₃-N and NH₄-N increased up to 3, 7, 34, 6 and 8 times, respectively, compared to initial ones. The number of viable bacteria in pond water and seabream larvae were 6.3× 10^6~2.3×10^7 cfu/㎖, 4.3~7.4×10^6 cfu/g in day 25, respectively.
Among the isolated bacteria from the diseased red seabream in day 25, Vibrio spp. was considered to be the causative organism. External symptoms of this disease were floated, spined near the surface and inflated abdomen. When the isolated strain of the Vibrio was bathed to seabream larvae, LD_(50) of seabream larvae was over 10^6 cfu/ ㎖ of Vibrio spp.
Total length of red seabream larvae hatched was 2.93㎜, and became 18.83~20.12㎜ at day 40. The first noticeable mortality of red seabream larvae (7.98~9.37㎜) occurred in 25~30 day-old fish with the survival rates of 59.8~60.3%. Thereafter the mortality of larvae decreased, survival rate was 20.5~25.45% in day 40.
After 20~30 days, the quality of pond water was bellow Ⅱ class. During the experimental period COD, PO₄-P, NO₂-N, NO₃-N and NH₄-N increased up to 3, 7, 34, 6 and 8 times, respectively, compared to initial ones. The number of viable bacteria in pond water and seabream larvae were 6.3× 10^6~2.3×10^7 cfu/㎖, 4.3~7.4×10^6 cfu/g in day 25, respectively.
Among the isolated bacteria from the diseased red seabream in day 25, Vibrio spp. was considered to be the causative organism. External symptoms of this disease were floated, spined near the surface and inflated abdomen. When the isolated strain of the Vibrio was bathed to seabream larvae, LD_(50) of seabream larvae was over 10^6 cfu/ ㎖ of Vibrio spp.
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UCI(KEPA) : I410-ECN-0101-2009-529-015345314