| 英文摘要 |
The purpose of this study is to collect rock porgy (Oplegnathus fasciatus) and nurture into broodstock. For determine optimal sex ratio in broodstock, and observe and record embryonic development period of change and time, as a basis for future artificial hatching technology. In addition, we also hope that the research and development of artificial rock porgy diet and nutritional needs. This project is designed feed different concentrations of protein diet to find out the optimal protein content for growth. Then, we use optimal protein content with different concentrations of lipid to find out optimal lipid for growth. This is for artificial diet of rock porgy development and manufacturing basis.In experiment 3-1, by using white fish meal as protein source, cod liver oil as lipid source, α-cellulose and α-starch as energy regulators, duplicate groups of juvenile rock porgy were fed with five groups of isocaloric diets containing the same dietary lipid level (8 %) but different dietary protein levels (35 %-55 %) with 5 % increment for 8 weeks. Analysis of weight gain by second-order polynomial regression indicated that the optimal dietary protein level of juvenile rock porgy was about 47.91 %. In experiment 3-2, by using white fish meal as protein source , cod liver oil as lipid source, α-cellulose and α-starch as energy regulators, duplicate groups of juvenile rock porgy were fed with five groups of isocaloric diets containing the same dietary protein level (48 %) but different dietary lipid levels (4 %-16 %) with 3 % increment for 8 weeks. Analysis of weight gain by second-order polynomial regression indicated that the optimal dietary lipid level of juvenile rock porgy was about 9.68 %. |