碩士 / 國立屏東科技大學 / 水產養殖系所 / 101 / There has been no solution for the high price of grouper larvae in Taiwan since the demand for larvae is always high. The shortage of larvae is mainly due to their high mortality, a consequence of lacking suitable food items for their tiny mouth gaps. In this study, we used inorganic fertilizers in the tanks to increase the survival of orange-spotted grouper larvae (Epinephelus coioides). In the fertilized group, inorganic nitrogen and phosphorus were added into the tanks filled with natural sea water, and nitrogen and phosphorus were maintained at 700μg/L and 100μg/L, respectively, whereas in the controlled tanks rotifers were added as food. The results showed that chlorophyll a (both >3.0 μm and 0.2~3.0 μm) were significantly higher in the fertilized group than the control group. Total nitrogen and phosphorus were also significantly higher in the fertilized group than the control group. Larval survival rate was not significantly different between the groups, but the average numbers of larvae in the fertilized group were consistently higher than in the control group.
| Identifer | oai:union.ndltd.org:TW/101NPUS5086003 |
| Date | January 2013 |
| Creators | 陳青毅 |
| Contributors | Yeh, Shinn-Pyng, Tew, Kwee-Siong, 葉信平, 張桂祥 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 58 |
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