DOI Number : 10.5614/itbj.sci.2012.44.2.3
Hits : 13

The Use of Biofiltration Technology and 3-dimensional Cubical Bamboo Shelter for Nursery Phase Productivity Improvement of Giant Freshwater Prawn

Gede Suantika, Pingkan Aditiawati, Malendra Rusni, Rifki R. Arief &Osman R. Turendro

Microbial Biotechnology Research Group
School of Life Sciences and Technology
InstitutTeknologi Bandung, Jl. Ganesha 10 Bandung 40132, Indonesia
Tel. +62-22-251-1575

Abstract. This experiment aimed to know the effect of nitrifying bacteria and Chlorellasp. addition and different number of 3-dimensional cubical bamboo shelter in enhancing growth performance of Giant Freshwater Prawn (Macrobrachium rosenbergii de Man) during nursery phase in indoor system. During28 days of culture, treatment II (4 shelters addition~40% culture volume occupation) resulted in better prawn growth and culture performance compared to control (no shelter addition) (p<0,05). At the end of experiment, treatment II shown the highest biomass, SGR, mean body weight and length of the prawn with (1.96+0.05) g.cage-1,, (2.18 +0,89) g and (6.50 +0.91) cm, respectively. However, the results were not significantly different compared to treatment I (2 shelters addition~20%culture volume occupation). Survival rate the two treatments (treatment I="90"%, and treatment II="92"%) was significantly higher compared to control (78%). During the experiments, increase of ammonium concentration and nitrate can be controlled and maintained by addition of nitrifying bacteria and microalgae which can keep the microbial loop between ammonium reduction by bacteria and nitrate uptake by microalgae in balance. Addition of nitrifying bacteria and microalgae and also availability of 40% bamboo shelter occupation in the culture can enhance prawn culture productivity.

Keywords: nitrifying; Chlorella; shelter; Macrobrachiumrosenbergii de Man; nursery

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