International Journal of Fisheries and Aquatic Studies
2021, Vol. 9, Issue 1, Part D
Effect of different C/N ratios on volume and potential microbial composition of flocs in freshwater prawn Macrobrachium rosenbergii culture system
Author(s): Md. Amirul Islam, Shikder Saiful Islam, Prosenjit Debnath, Joyanta Bir and Khandaker Anisul Huq
Abstract: The present study was conducted to evaluate the effects of C/N ratio on the volume of floc formation as well as on the load of several potential microbes of the fresh water prawn (
Macrobrachium rosenbergii) culture tanks. The experiment was designed with three different C/N ratios
viz. 10:1, 15:1, and 20:1 as T
1, T
2 and T
3 were applied with a control (C) at laboratory condition. It was observed that C/N ratio 15:1 (12.22 ± 1.08 ml/L) and 20:1 (15.33 ± 1.37 ml/L) gave higher floc development compared to control C (5.22 ± 0.62 ml/L) and T
1 (7.22 ± .46 ml/L) (
P<0.05). The loads of
Enterococcus spp.was found to be highest in T
2, followed by T
1, C and T
3 (
P<0.05). Higher
Lactobacilllus spp. load was found in T
1 and T
2 compared to T
3 and C, which indicates that growth of
Lactobacillus spp. require a fair range of carbon source. No
Salmonella spp. was found in any treatment. The present findings indicate that C/N ratio 15:1 could be applied in sustainable freshwater prawn culture.
DOI: 10.22271/fish.2021.v9.i1d.2417Pages: 310-317 | 1040 Views 294 DownloadsDownload Full Article: Click Here
How to cite this article:
Md. Amirul Islam, Shikder Saiful Islam, Prosenjit Debnath, Joyanta Bir, Khandaker Anisul Huq.
Effect of different C/N ratios on volume and potential microbial composition of flocs in freshwater prawn Macrobrachium rosenbergii culture system. Int J Fish Aquat Stud 2021;9(1):310-317. DOI:
https://doi.org/10.22271/fish.2021.v9.i1d.2417
