154Developments on Two Newly Cultivated Species Capsosiphon Fulvescens and Costaria Costata in Korea

In the recent years, there has been increasing demand of nutritive and health foods in Korea. Species diversification is needed in order for seaweed aquaculture to take advantage of these expanding markets. With this in mind, the cultivation of Capsosiphon fulvescens and Costaria costata , was successfully developed. Capsosiphon fulvescens is a filamentous chlorophycean alga growing in the upper littoral regions of the rocky-shore. It has been used as food in the form of soup with oysters along the Southwestern Coast of Korea. After the development of artificial ¡ seed¡± production (control of light, photoperiod and temperature of parthogenetic gametes), pilot scale, and then large scale, cultivation techniques were established for mass culture of this species. In 2001, the retail price was about $6.2/kg fresh wt with a total production of 770 ton. Costaria costata , a phaeophycean alga, was initially cultivated along the Eastern Coast of Korea. It has now been transplanted successfully to culture grounds along the Southern Coast. The cultivation techniques are very similar to Undaria and Laminaria, ie. long line techniques. It¡¯price is about $1.7/kg fresh wt with total production of 2,000 ton. An overview of these new maricultures technologies that have lead to the successful expansion of the seaweed industry in Korea will be presented.