• Journal of Aquaculture
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• v.11 no.1
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• pp.113-118
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• 1998

This study was carried out to investigate feeding of bacteria by Tigripus japonicus (Copepoda : Harpacticoida) under axenic culture. The ovigerous females and nauplii were grown with feed of aquatic bacteria. Growth of RT bacteria strain was suppressed by feeding of co-existing T. japonicus. T. japonicus of non-axenic culture was observed with oil bead in the egg sac. On the other hand, early nhauplius stage did not develop to the next stage without stage took bacteria as food. And the adult of T. japonicus may utilize the baxteria as nutrient source for egg development.

• Journal of Aquaculture
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• v.11 no.2
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• pp.261-269
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• 1998

The harpacticoid copepod, Tigriopus japonicus is one of the important zooplankton as a live food the production of marine fish fry. This reserch was carried out to investigate the culturing method and dietary value of T. japonicus. The reproduction of this copepod was analysed in the culturing systems (tne opened and the closed systems) and the surface area of the substate plates for the mass culture. Survival rate of the mature female and the number of nauplii produced per female for two day was higher in the open culturing system than in the close system. However, the result of survival rate of the nauplius was reversed. Larger surface area of the culturing vessel accommodated higher density of this bentic copepod. In polyculture of T. japonicus and rotifer (B. plicatilis), growth of T. japonicus seems to be dependent on the rotifer density. But rotifer seems to be independent on the copepod. With regard to dietary value, this copepod is better than Artemia nauplius for the larvae of red sea bream and tiger puffer which feed by picking. However, it is inadequate for bottom fish larvae as flounder.