Laver is the oldest major aquaculture species in Korea, and has been developing and devising methods to increase aquaculture productivity, which is starting with the aquaculture method using bamboo sheaths. As a result, laver production has also increased rapid progress.
In particular, seaweed aquaculture in Gyeonggi-do is an important industry, as more than 80% of the aquatic production is produced by laver. However, Gyeonggi-do laver aquaculture is conducted by using conchocelis grown in Jeonnam and Chungnam regions, and there is a problem of location adaptation. So, in spite of the environmental conditions suitable for laver aquaculture, there is an economic disadvantage. In order to develop and test suitable conchocelis for Gyeonggi-do, this study established an indoor culture system and conducted basic research for conchocelis production. So, Gyeonggi- bay laver was collected and induced conchocelis. For cultivate and manage conchocelis, a culture table with adjustable light intensity of 200-10,000lx was installed. If necessary, pipes with housing filters were installed in each culture table for aeration culture, and the temperature of the culture room was maintained at 14~17℃. To examine the indoor-cultivating the laver, a part of the roof was opened and closed, and a 95% shade was installed to control the illumination and temperature. Seven of culture tanks are made of FPR (8,000×1,500×700mm) material, and four of them were installed with water-wheels to enable flow. As a result of indoor-cultivating test, laver growth rate is increased by water-flow. It grew about 5.7 times at 10 rpm(water-wheels speed), and grew up to more than 14 cm were found. However, almost no growth occurred from the 40th day of culture. In case of 20 rpm(water-wheel speed), the best growth was shown. It grew 7.8 times than control tank and maximum length of 15 cm or more were often found. In addition, for 50 days of cultivation, the health and color was generally good enough. Therefore, the Indoor-test culture result showed that laver is grown better in much water-flow which is even in the same illuminance and nutrient environment.