전자저널 > 전자저널 > A Study on the Optimum Stocking Density of the Juvenile Abalone, Hailotis discus hannai Net Cage Culture or Indoor Tank Culture

A Study on the Optimum Stocking Density of the Juvenile Abalone, Hailotis discus hannai Net Cage Culture or Indoor Tank Culture

Byeong-Hak Kim, Min-Woo Park, Tae-Ik Kim, Jae-Kwon Cho, Maeng-Hyun Son and Jeong-In Myeong

Southwest Sea Fisheries Research Institute, NFRDI, Yeosu 556-823, Korea Aquacuture Research Institute, NFRDI, Gijang-gun, Busan 619-902, Korea

Experiments for net cage culture at sea were conducted in each 2.4 × 2.4 m in area and took the samples from four different densities: 150, 300, 450 and 600 per cross-sectional area (m2) of shelter. The same stocking densities applied to indoor tank culture to investigate the growth and survival rate. The size of juvenile abalone sample was 36.14 ± 2.28 mm for net cage culture and 38.62 ± 3.22 mm or indoor tank. Feed such as raw brown sea mustard, raw kelp and dried kelp was sufficiently provided to the abalone. In net cage culture experiment, the growth of the spat of juvenile abalone was the fastest 60.53 ± 5.75 mm in the 150 abalone cage per square meter (m2), followed by the 300 abalone cage at 54.01 ± 5.17 mm, 450 abalone cage at 51.48 ± 5.37 mm and 600 abalone cage at 51.09 ± 4.96 mm in order. In the meantime, in the indoor tank experiment, the 150 abalone indoor tank was the fastest 47.50 ± 6.31 mm per square meter, followed by the 300 abalone tank at 45.92 ± 5.23 mm, the 450 abalone tank at 44.24 ± 5.59 mm and the 600 abalone tank at 43.62 ± 4.44 mm in order. The survival rate was more than 97.9% in all the experiments, not showing a significant difference.

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