A novel study on the effect of rapid biofloc as pellet feed on the survival rate and water quality of mud crab Scylla olivacea culture

Nor Azman Kasan, . and Hidayah Manan, . and Mohd Tamrin Mohd Lal, . and Ahmad Ideris Abdul Rahim, . and Amyra Suryatie Kamaruzzan, . and Ahmad Najmi Ishak, . and Mhd Ikhwanuddin, . A novel study on the effect of rapid biofloc as pellet feed on the survival rate and water quality of mud crab Scylla olivacea culture. pp. 46-54. ISSN 2672-7226

In order to promote the optimum survival rate of mud crab Scylla sp. in crablet culture green technology approaches must be developed to increase the yield of mud crab production. The application of biofloc in Scylla sp. culture was proven successful in promoting a good crablet performance and sustaining a good water quality condition. Therefore due to its importance this study aimed to determine the survival rates of Scylla olivacea crablets cultured in tanks fed with pelleted rapid biofloc aggregates. Three feeding trials were conducted consisting of commercial pellet (CP) rapid biofloc pellets (BP) and a mix of rapid biofloc pellets with commercial pellets (BPCP) and were cultured up to 13 weeks of culture periods. The mud crab crablets were fed twice a day while water exchanges were only conducted once per week. The survival rates were calculated at the end of the culture period while water quality parameters were regularly monitored. Overall our findings showed that the survival rate in the BPCP treatment was the highest with 30 while 23.3 and 10 in CP and BP treatment respectively. The water parameter was in optimum range in CP BP and BP CP treatment tanks where pH ranged from 8.19 to 8.26 temperature between 26.68C to 26.69C and salinity between 32.17ppt to 33.16 ppt. Ammonium NH‚„ was below an optimum range with 0.18mg/L in BP treatment and 0.21 mg/L in BPCP as compared to CP. Meanwhile nitrite NO‚‚- was identified below 1mg/L which ranged between 0.07 and 0.08 mg/L. Therefore it can be concluded that combination of commercial and pelleted rapid biofloc aggregates have the potential capability to increase the survival rate of mud crab crablet culture while sustaining good water quality parameters and nutrient level.

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Abstract

In order to promote the optimum survival rate of mud crab Scylla sp. in crablet culture green technology approaches must be developed to increase the yield of mud crab production. The application of biofloc in Scylla sp. culture was proven successful in promoting a good crablet performance and sustaining a good water quality condition. Therefore due to its importance this study aimed to determine the survival rates of Scylla olivacea crablets cultured in tanks fed with pelleted rapid biofloc aggregates. Three feeding trials were conducted consisting of commercial pellet (CP) rapid biofloc pellets (BP) and a mix of rapid biofloc pellets with commercial pellets (BPCP) and were cultured up to 13 weeks of culture periods. The mud crab crablets were fed twice a day while water exchanges were only conducted once per week. The survival rates were calculated at the end of the culture period while water quality parameters were regularly monitored. Overall our findings showed that the survival rate in the BPCP treatment was the highest with 30 while 23.3 and 10 in CP and BP treatment respectively. The water parameter was in optimum range in CP BP and BP CP treatment tanks where pH ranged from 8.19 to 8.26 temperature between 26.68C to 26.69C and salinity between 32.17ppt to 33.16 ppt. Ammonium NH‚„ was below an optimum range with 0.18mg/L in BP treatment and 0.21 mg/L in BPCP as compared to CP. Meanwhile nitrite NO‚‚- was identified below 1mg/L which ranged between 0.07 and 0.08 mg/L. Therefore it can be concluded that combination of commercial and pelleted rapid biofloc aggregates have the potential capability to increase the survival rate of mud crab crablet culture while sustaining good water quality parameters and nutrient level.

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Item Type:	Article
AGROVOC Term:	Scylla olivacea
AGROVOC Term:	Crabs
AGROVOC Term:	Pelleted feeds
AGROVOC Term:	Animal feeding stuffs
AGROVOC Term:	Water quality
AGROVOC Term:	Growth rate
AGROVOC Term:	Environmental conditions
AGROVOC Term:	Survival
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/10701

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