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open access
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ISSN : 1225-3480
This study was conducted to investigate the growth and survival rate of Haliotis discus hannai in sea cages due to differences in stocking density, cleaning frequency and seaweed supply amount. In the process of abalone aquaculture, the experiment was carried out to measure the management efficiencies according to the culture densities (800, 1100, 2000 seeds per cage), diet supply amounts (1.3, 2.0, 3.0, and 6.0 kg/day/cage), and cage cleaning cycles (once and twice per month). The sea cage used in the experiment was 2.4 m × 2.4 m. At the end of the experiment, the weight growth of 2000 stocking density was significantly lower than that of the other experimental groups, but the survival rate was not significantly different among the experimental groups. The frequency of cage cleaning affected both the weight growth and survival rate of the abalone. Weight growth was the highest in the experiment cleaned once a month and survival rate was the lowest in the experiments that had never been cleaned. In the diet supply amount experiment, there was no difference in weight growth between the 2 kg/day and 6 kg/day experimental groups, but the survival rate of the 6 kg/day group was significantly lower.
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