Polyculture of freshwater prawn and silver carp in earth pond | |
| Author | Latt, Win |
| Call Number | AIT Thesis no. AE-87-33 |
| Subject(s) | Shrimp culture Carp |
| Note | A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The polyculture system using freshwater prawn (Macrobrachium rosenberqii) and silver carp (f!Y..l2.Qphthalmichthys molitrix} may solve the dissolved oxygen depletion problem normally experienced in prawn monoculture systems. The experimental design was set up with 4 treatments in duplicate with the juvenile prawn stocking density fixed at 4 . 75/m2 and grow with four different stocking density of silver carp fingerlings (0 . 0/m2, 0.25/m2, 0.50/m2 and 1 . 0/m2) . Prawns were fed with commercial prawn pellet ( 27% crude protein} feeding rate of 10% of prawn biomass (feed dry weight basis prawn wet weight basis } for the first six weeks and thereafter reduced to 5% for the remaining six weeks. No feeds were given to silver carp. The experimental period was 87 days. The highest ·extrapolated prawn yield, 311 . 14 kg/ha/crop was obtained from monoculture treatment and the lowest, 208.52 kg/ha/crop was attained from polyculture treatment . The specific growth rate of prawn ranged from 3.19% to 3 . 25% among the treatments. The highest prawn survival rate , 81 . 32% was found in treatment 4 stocked with 1 silver carp/m2 and the lowest , 66.00% was found in Treatment 1 using monoculture system . The highest fish yield, 304.43 kg/ha/crop was obtained from Treatment 2 with 0 . 25 fish/m2 and the lowest, 276.41 kg/ha/crop was obtained from Treatment 3 using 0 . 5 fish/m2 . The highest fish survival r ate, 96% was found in Treatment 2 using 0 . 5 fish/m2 while the lowest, 91% achieved in Treatment 3 using 0 25 fish/m2 . maximum and minimum dissolved oxygen value of 28 . 8 and 0.0 mg/1 were recorded in the treatment using prawn monoculture system respectively. Temperature , pH and transparency values ranged from 28.0-37 . 50 C, 7.87-9 . 7, 4-85 cm respectively among t h e treatments. Ammonia, phythoplankton biomass and total alkalinity ranged f rom 0 . 05-2 . 81 mg /l, 2 - 218 mg /1 and 190- 355 mg /l CaCO respectively. |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Wee, Kok Leong ;Edwards, Peter |
| Examination Committee(s) | Lin, Chang Kwei |
| Scholarship Donor(s) | Government of Japan |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |