| 英文摘要 |
Haliotis diversicolor aquaculture and hatchery technique emerged in the late 1970s on a very small scale in TaThis study examined the effects of microparticulate diets supplemented with emulsified fish oil on the survival and growth rate of Taiwan small abalone juveniles. Agar was used a binding agent to make microparticulate diets. Taiwan small abalone juveniles were cultured in different tanks supplied with 0.15-0.2 ppm ozone and experiment system was divided into two: one with shade treated (90% light shading) and the other without shading. The plastic plates were treated with a) without supplemented with artificial diet, b) artificial diet with only agar, c) artificial diet with agar and chlorella powder, d) artificial diets with 0.5, 1.0 and 2.0% emulsified fish oil and agar, e) without added ozone, shade and natural diatom grown in the plastic plates. Experimental duration was 35 days and survival, growth rate, daily growth rate, the amount of bacteria and the microalgae were identified every seven days. In the shaded treatment, Taiwan small abalone juveniles fed with microparticulate diets supplemented with 0.5% emulsified fish oil and chlorella powder had the significant higher daily growth rate. Their daily growth rates were 78.45 um/day and 77.8 um/day, respectively. Taiwan small abalone juveniles fed with 0.5% emulsified fish oil microparticulate diet had the highest survival (35.09%). In the without shaded treatment, Taiwan small abalone fed with 2% emulsified fish oil microparticulate diet had the highest growth rate and daily growth rate. They were 3708.3 um and 98.8 um/day, respectively. Taiwan small abalone cultured without ozone, shading and artificial diet had the lowest growth rate (2853 um) and daily growth rate (74.4 um/day) and more different species of diatom grown on the plates. The amount of bacteria in this treatment was 2.6 x 105 CFU/ml. |