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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1999.9
- 수록면
- 213 - 220 (8page)
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초록· 키워드
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This study was performed to investigate the effects of water temperature and stocking density and rotifer density on the mass production of larval red marbled rockfish, Sebastiscus tertius.
Total length of the marbled rockfish larva grown in 23℃ of water temperature were 10.80 mm, which was the best, while those grown in 29℃ of water temperature were 6.28 mm, which was the lowest. The survival rates of red marbled rockfish larvae grown in 20℃ and 23℃ were 24.0% and 18.5%, respectively. However, the survival rate of red marbled rockfish larvae grown in 26℃ was 7% and no larvae survived in 29℃.
The total length of red marbled rockfish larva stocked at the density of 5 and 10 larva per liter of water were high, which were 11.52 mm and 11.22 mm, respectively, but those stocked at the density of 30 larva per liter of water were 7.55 mm, which was the lowest. The survival rate of red marbled rockfish larva stocked at the density of 2.5 larva per liter of water was 52.0%, which was the best, but the lowest, 18.0% for the red marbled rockfish larva stocked at the density of 30 larva per liter. There was a trend toward decrease in survival rate of red marbled rockfish larva as their stocking density increased.
The survival rates of red marbled rockfish larva fed rotifers at the density of 10 and 5 individuals per ml were high, 48.5% and 48.0%, and their total lengths were 11.92 and 11.89 mm, respectively, which grew relatively fast. The survival rate and the total length of red marbled rockfish larva fed rotifers at the density of 30 individuals per ml were the lowest, which were 8.40 mm and 21.5%, respectively. Also, red marbled rockfish larva fed rotifers at the density of more than 20 individuals per ml achieved poor survival and growth.
These results indicated that the proper conditions for the mass production of larval red marbled rockfish were 23℃ of water temperature, fish larva stocking density of 5 to 10 larva per liter of water and rotifers density of 5 to 10 individuals per ml as live feed.
Total length of the marbled rockfish larva grown in 23℃ of water temperature were 10.80 mm, which was the best, while those grown in 29℃ of water temperature were 6.28 mm, which was the lowest. The survival rates of red marbled rockfish larvae grown in 20℃ and 23℃ were 24.0% and 18.5%, respectively. However, the survival rate of red marbled rockfish larvae grown in 26℃ was 7% and no larvae survived in 29℃.
The total length of red marbled rockfish larva stocked at the density of 5 and 10 larva per liter of water were high, which were 11.52 mm and 11.22 mm, respectively, but those stocked at the density of 30 larva per liter of water were 7.55 mm, which was the lowest. The survival rate of red marbled rockfish larva stocked at the density of 2.5 larva per liter of water was 52.0%, which was the best, but the lowest, 18.0% for the red marbled rockfish larva stocked at the density of 30 larva per liter. There was a trend toward decrease in survival rate of red marbled rockfish larva as their stocking density increased.
The survival rates of red marbled rockfish larva fed rotifers at the density of 10 and 5 individuals per ml were high, 48.5% and 48.0%, and their total lengths were 11.92 and 11.89 mm, respectively, which grew relatively fast. The survival rate and the total length of red marbled rockfish larva fed rotifers at the density of 30 individuals per ml were the lowest, which were 8.40 mm and 21.5%, respectively. Also, red marbled rockfish larva fed rotifers at the density of more than 20 individuals per ml achieved poor survival and growth.
These results indicated that the proper conditions for the mass production of larval red marbled rockfish were 23℃ of water temperature, fish larva stocking density of 5 to 10 larva per liter of water and rotifers density of 5 to 10 individuals per ml as live feed.
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