Water quality remediation using geotextile in fish hatchery systems

Abentin Estim, and Saleem Mustafa, (2014) Water quality remediation using geotextile in fish hatchery systems. Journal of Aquaculture Research and Development, 5 (4). ISSN 21559546

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Abstract

This study was designed to use Aquamatâ„¢ in the daily exchange and flow-through culture systems of fish hatchery for improving the quality of seawater. Aquamatâ„¢ is a commercial innovative product fabricated from highly specialized synthetic polymers that forms a three dimensional structure. Results showed that the Aquamatâ„¢ reduced ammonia (NH3-N), total suspended solids (TSS) and dissolved oxygen (DO) concentrations in the daily exchange system but not in the flow-through system. Average values of NH3-N (F=0.028; t=-2.006; P=0.047), TSS (F=4.550; t=-2.787; P=0.006) and DO (F=25.085; t=-2.833; P=0.005) concentrations were significantly lower in the culture tank with Aquamatâ„¢ than the culture tank without Aquamatâ„¢. Fish biomass gain was significantly higher (F=2.177; t=-4.296; P=0.001) in the culture tanks of with Aquamatâ„¢ than without Aquamatâ„¢. The bacterial density was significantly higher (F=11.437; df=2; P=0.000) on the surface of Aquamatâ„¢ than in the seawater of culture tanks with and without Aquamatâ„¢. This study suggests that the Aquamatâ„¢ provides surface area for fish to hide from cannibalism activity, thereby reducing mortality. It was also found that the extra feeds and fish wastes attached to the surface of Aquamatâ„¢, reduced TSS concentration in the water with culture system. The surface of Aquamatâ„¢ also provided places for microbes to grow and increased the nitrification process. The nitrification processes converted NH3-N to NO2-N then NO3-N with help from nitrifier bacteria and DO concentrations, which reduced NH3-N toxicity in the culture system. However, result also showed that the Aquamatâ„¢ increased the NO2-N and NO3-N concentrations in the culture system. This study suggests that the Aquamatâ„¢ is still not capable of eliminating the entire amount of dissolved inorganic nitrogen in the culture system for water quality management in a fish hatchery system.

Item Type: Article
Uncontrolled Keywords: Ammonia; Fish hatchery; Geotextile; Nitrate; Nitrite; Water quality
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Depositing User: MDM FAUZIAH MATSIN
Date Deposited: 15 Dec 2014 07:16
Last Modified: 13 Oct 2017 03:37
URI: http://eprints.ums.edu.my/id/eprint/10147

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