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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1993.8
- 수록면
- 147 - 157 (11page)
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The harpacticoid copepod, Tigriopus japonicus is one of the most important zooplankton as a live food for the production of marine fish fry. Thus, the salinity tolerance and the optimum culture environment of this copepod in terms of salinity, temperature and light were examined. The food values of 6 kinds of phytoplankters and 2 kinds of yeast were also investigated for mass culture of this copepod. The results are as follows :
After 5 day culture in the experiment of salinity tolerance, the survival rates of the gravid female at 0‰ and 90‰ were 40％ and 70％, respectively. However, at salinity ranging from 2‰ to 80‰, high survival rates above 85％ were observed. It means T. japonicus is very euryhalinous species.
Temperature was more important factor than salinity for the fecundity of T. japonicus. The optimum culture conditions of this species were 24℃, 24‰, and 3,000lux with 24L : 0D. Under these culture conditions, the average fecundity from a gravid female per spawning was 38 nauplii, and the interval time between spawnings were 2.05 days.
Phaeodactylum tircornutum seemed to be the most suitable phytoplankton as a live food for T. japonicus, and the large chlorophyta, Tetraselmis suecica showed the lowest food value among 6 phytoplankters and 2 yeasts. The food value of ω-yeast was better than that of baker's yeast, and it is similar to that of phytoplankton such as Amphora sp., Chlorella ellipsoidea and Nannochloris oculata. So, the ω-yeast seems to be appropriate food source for mass culture of T. japonicus.
After 5 day culture in the experiment of salinity tolerance, the survival rates of the gravid female at 0‰ and 90‰ were 40％ and 70％, respectively. However, at salinity ranging from 2‰ to 80‰, high survival rates above 85％ were observed. It means T. japonicus is very euryhalinous species.
Temperature was more important factor than salinity for the fecundity of T. japonicus. The optimum culture conditions of this species were 24℃, 24‰, and 3,000lux with 24L : 0D. Under these culture conditions, the average fecundity from a gravid female per spawning was 38 nauplii, and the interval time between spawnings were 2.05 days.
Phaeodactylum tircornutum seemed to be the most suitable phytoplankton as a live food for T. japonicus, and the large chlorophyta, Tetraselmis suecica showed the lowest food value among 6 phytoplankters and 2 yeasts. The food value of ω-yeast was better than that of baker's yeast, and it is similar to that of phytoplankton such as Amphora sp., Chlorella ellipsoidea and Nannochloris oculata. So, the ω-yeast seems to be appropriate food source for mass culture of T. japonicus.
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