Bacteria Associated with Biofilms in a Macrobrachium rosenbergii Hatchery
Biofilms are important biological structures formed on most submerged aquatic surfaces. They comprise a unique niche wherein a community of microorganisms co-exist. The study was undertaken to identify the bacterial flora associated with biofilms formed on the surface of larval rearing tank...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Asian Fisheries Society
2007-10-01
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| Series: | Asian Fisheries Science |
| Online Access: | https://www.asianfisheriessociety.org/publication/downloadfile.php?id=339&file=Y0dSbUx6QTNNRFEzTWpBd01ERXpOVFU0TURZNU5Ua3VjR1Jt |
| Summary: | Biofilms are important biological structures formed on most submerged aquatic surfaces. They comprise a unique niche wherein a community of microorganisms co-exist. The study was undertaken to identify the bacterial flora associated with biofilms formed on the surface of larval rearing tanks in a prawn hatchery. Surface swabs of two randomly chosen larval rearing tanks in a hatchery were taken regularly throughout the hatchery cycle and the bacterial loads were estimated. The counts varied from 1.8x103 to 4.3x104 CFU.cm-2 in Tank I and 5.1x103 to 3.5x104 CFU.cm-2 in Tank II. No significant difference was observed between Tank I and Tank II in respect of biofilm bacterial count when enumerated (p<0.05). The common bacterial genera isolated in both tanks comprised gram-negative bacteria including Pseudomonas, Vibrio and Aeromonas. Bacillus and other non-spore formers were the predominant gram-positive bacteria isolated. Bacteria associated with biofilms are more resistant to antibiotics and water sanitizers generally used in tank water treatment. Biofilms can be a reservoir of pathogens and bacteria such as Pseudomonas, Aeromonas and Vibrio isolated from the biofilms in this study may be potential pathogens of prawn larvae in hatcheries. |
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| ISSN: | 0116-6514 2073-3720 |