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Optimization of Biofloc Volume in Improving Water Quality on Mud Crab
(Scylla Paramamosain) Larvae
Chin Sze Yee
Supervisor: Dr. Nor Azman Kasan
Bachelor of Applied Science (Fisheries)
School of Fisheries and Aquaculture Sciences
A series of biofloc treatments using 500 L tanks were carried out to achieve optimal
biofloc volume in improving water quality for mud crab, Scylla paramamosain larvae.
A trial of four different biofloc volumes (0, 2, 4 and 6 mL/L) on larvae stage were
conducted for 20 days. From the observation in the T1, T2, and T3 tanks, ammonium
concentration was ranged between 0.120 and 0.598 mg L -1 , while nitrite was ranged
between 0.035 and 0.154 mg L -1 . There were significant different (p < 0.05) among
treatments show in the parameters of pH, DO, salinity and ammonium. The recorded
survival rate of larvae in control tank is higher than biofloc treatments. This may due
to the low catchability and passive predator characteristic of larvae. This concludes
that biofloc can effectively remove nitrogenous wasted in treatment tanks and
maintained water quality in optimal level for mud crab.
582 | UMT UNDERGRADUATE RESEARCH DAY 2018