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Saccharina japonica was introduced to both Korea and China from Hokkaido, Japan, and it has become an economically important species in both nations. After a long period of cultivation, several varieties of S. japonica have been developed in Korea and China. In this study, we conducted aquacultural research on the persistence of thalli from two kelp cultivars, one from China (

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The mass cultivation of Ecklonia cava Kjellman was studied as a potential biomass source for the extract industry in Korea. Experiments were conducted to investigate the optimal conditions for artificial seed production and mass cultivation of this species. Maximum growth and young thalli development in the nursery culture area occurred at 2 m depth, whereas maximum growth of thalli in the main culture area occurred at 1 m depth. Production of E. cava was between 2.6 and 3.6 kg wet wt. m -1 after depth control and removal of fouling organism, etc. The relationship between optimal water depth for culture and underwater irradiance during the E. cava cultivation was calculated as: y = -0.718x + 8.042 (r 2 =0.976). The growth rates achieved in this trial indicate that E. cava cultures could produce and supply sufficient biomass. (Fig. 1A). 채묘틀은 4시간 동안 유주자액에 담가 유주자 착생을 유도하고 이후 깨끗한 여과해수를 넣은 수조로 옮겨 수조배양을 실시하였다 (Fig. 1B). 수조 배양은 유주자 채묘후 1주일간은 배양 해수를 환수시키지 않았으며, 이후 0.5 L min -1

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