| 英文摘要 |
With increasing economies, Grouper has become widely liked fish because of its high meat quality. The demand for grouper meat has increased tremendously such that the supply of its fingerlings has been progressing slowly due to occurrence of virus disease. The objective of this study was to raise fingerlings up to 3 inches which is critical size prone to virus disease and optimal size for marketing. Initially larvae are raised in indoor recirculating systems. This study focused on improving the existing system to high standards to ensure good aquacultural practices favoring the environment.
A 30 day study was conducted in which grouper were raised from 1.8 cm to 8 cm with over 95% survival. The improved system has the advantage that it reduces the number of times of changing water from two to one and saves labour time. Moreover, in the old system, the white body stage larvae are fed shrimp paste and require up to three times changing water and cleaning the system which can be achieved with one change in the new system. At the end of the study, the biomass in the new system raised up to 15kg of fish. The highest biological parameters after feeding of oxygen consumption from 3.6cm, 6.5 cm and 9.6cm size grouper fingerlings were 163, 102 and 83 mg O2/100g fish, respectively. |