Abstract
In this work, electrolyte enhanced water (EW) was used to determine the effect of EW in culturing freshwater prawns. The giant freshwater prawn juvenile, Macrobrachium rosenbergii, was exposed to different concentrations of EW in experiment 1. The EW was added into the water and labeled as treatment A1 which consists of 1% anolyte and 0.5% catholyte. In the respective treatments, the proportion of anolytes and catolytes are as follows: treatment B1 (1% anolyte and 1% catholyte), treatment C1 (2% anolyte and 0.5% catholyte), treatment D1 (2% anolyte and 1% catholyte), and control (without EW). All these treatments were run in three replicates for each treatment including the control. In the first experiment, the growth of the M. rosenbergii under treatment A1 showed an increased in growth as compared to the control after 56 days of exposure with a significant difference of p < 0.05. The survival rate of prawns is higher in treatments A1 (73%), B1 (70%), and control (63%) as compared to treatments C1 (53%) and D1 (50%). In the second experiment, the treatment using EW concentration of 1% anolyte and 0.5% catholyte was used as the most suitable concentration for the prawn culturing tested with recirculating aquaculture system (RAS). The treatments used in the second experiment was labeled as A2 (EW), B2 (EW and RAS), C2 (RAS), and control. Treatment B2 showed a higher growth and survival rate and was significantly different to the other treatments. The colony-forming unit (CFU) showed a lower count of bacteria in all experiments that used EW as compared to the control. The concentration of 1% of anolyte and 0.5% of catholyte has shown to improve the growth and survival rate of the M. rosenbergii culture when combined with the RAS. This study showed a potential use of electrolyte enhanced water in culturing giant freshwater prawn.
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Abbreviations
- CFU:
-
Colony-forming unit
- EW:
-
Electrolyte enhanced water
- RAS:
-
Recirculating aquaculture system
- TSA:
-
Trypticase soy agar
- SPSS:
-
Statistical Package for the Social Sciences
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Acknowledgements
The authors would like to thank Pusat Penyelidikan Tasik Chini (PPTC), Faculty of Science and Technology, UKM, for the grant no. STGL-001-2013 that was funded by the Ministry of Natural Resources and Environment (NRE) and Ministry of Education (MOE), grant no. LRGS/BU/2012/UKM/BS, for providing financial support for this project.
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Appendix
Appendix
Schematic diagram for recirculating aquaculture system (RAS) that was used in experiment 2. The water goes through three types of filters that consist of a physical filter (aquarium filter), chemical filter (shellfish), and biological filter (Bio-ball) before being pumped back into the livestock aquarium
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Sahrir, M.S.A., Idris, M., Samat, A. et al. Effects of electrolyte enhanced water on culturing giant freshwater prawn Macrobrachium rosenbergii . Aquacult Int 26, 419–431 (2018). https://doi.org/10.1007/s10499-017-0223-1
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DOI: https://doi.org/10.1007/s10499-017-0223-1