| Author | Nguyen, Van Be |
| Call Number | AIT Thesis no. AE-93-26 |
| Subject(s) | Shrimp culture
|
| 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 study was carried out with two species of Penaeid shrimps, Penaeus monoclon and Penaeus merguiensis. The former was reared from stage 3 protozoea to stage 15 postlarvae in static clear water system with water exchange 50% per day. The wastewater from the larval rearing was stored in an outdoor concrete tank where diatoms were allowed to bloom and the "green water" was used to nurse the shrimp from stage 15
postlarvae to stage 50 postlarvae. The latter was reared in recirculation system at two different water flow-rates of 2 and 5 L/h through 30-L aquaria.
The results obtained from the present study suggested that there was a feasibility of using wastewater from shrimp hatcheries to nurse them from postlarvae to juvenile in small-scale back yard operations.
Stocking densities of 90, 40 and 100 shrimp per liter were found to be optimal in recirculated water system for rearing shrimp from mysis to stage 5 postlarvae , from stage 5 postlarvae to 15 day old postlarvae, and from postlarvae to juvenile respectively . Water exchange more than 200% per day should be implemented to avoid ammonia toxicity in the rearing water. Granular dolomite limestone was a good biofilter media in term of its high carrying capacity, however, due to its non-porous and heavy density, its optimum portion in the filter bed need to be studied further.
Parasiticides including cooper sulfate, formalin and potassium permanganate, and antibiotics including erythromycin and furazolidone at the dose 0.2, 100 and 2 ppm; and 5 and 5 ppm, respectively had little short term effect on nitrification that removes or reduces ammonia as indicated by only slight decrease in ammonia removal capacity in the system upon additions of those chemicals, However, they were recovered later, It is likely that all the chemicals had no effect on nitrite oxidizers.
|
| Year | 1993 |
| 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) | Lin, Chang Kwei
|
| Examination Committee(s) | Phillips, Michael John ;Yakupitiyage, Amararatne
|
| Scholarship Donor(s) | The Government of Denmark |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1993 |