碩士 / 國立屏東科技大學 / 水產養殖系所 / 98 / Marine fish larviculture has been unsuccessful partly due to the lack of suitable size of food. In this study, we maintained inorganic nitrogen at 700 μg/l and phosphorus at 100 μg/l to induce growth of different sizes of plankton in experimental group (F group), and no addition of nutrient in controlled group (N group) to compare the growth and survival rates. The results showed that the red snapper (Lutjanus erythropterus) were raised in F group, they started feeding on oligotrich ciliates (Strobilidium sulcatum) at 3 days post hatch (DPH), while those in the N group fed on rotifers (Brachionus rotundiformis) that we added. The survival rate were 2.2% in N group and 0 % in F group. When giant grouper (Epinephelus lanceolatus) was raised, in F group they fed on ciliates at 3 – 5 DPH (3.59 ± 0.47 ind/fish), and on copepods nauplii at 8 – 24 DPH, while those fed with rotifer in N group died off after 5 days, and the survival rate of F group were 0.3 % when the experiment ended. When orange-spotted grouper (Epinephelus coioides) was raised, they started feeding on dinoflagellates (Peridinium spp.) followed by rotifer when their mouth opened, while those in the N group fed on rotifer that we added. The survival rates were higher in N group (8.1± 2.1 %) than in F group (2.3 ± 0.8 %). Of the three species, the mouth size of red snapper and orange-spotted grouper were 221 ± 21 μm and 181 ± 12 μm, and can readily feed on rotifer, while giant grouper has small mouth size (157 ± 5 μm) that could only feed on small zooplankton (eg. Strobilidiidae). The results revealed that control of nutrient can provide preys of smaller sizes for larval fish that can enhance their survival in culture.
| Identifer | oai:union.ndltd.org:TW/098NPUS5086004 |
| Date | January 2010 |
| Creators | Chien-Hua Chen, 陳建華 |
| Contributors | Saou-Lien Wong, Kwee Siong Tew, Ming-Yih Leu, 翁韶蓮 博士, 張桂祥 博士, 呂明毅 博士 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 63 |
Page generated in 0.0014 seconds