Seaweeds as biofilter for monitoring water quality in aquaculture systems.

Seema, C (2002) Seaweeds as biofilter for monitoring water quality in aquaculture systems. Masters thesis, Central Institute of Fisheries Education.

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    Abstract

    Aquaculture poses a great potential for protein production world wide. Land-based facilities reduce m any of the obstacles such as predation, poaching, weather conditions and regulation connected with offshore mariculture. Onshore mariculture faces a lot of difficulties due to accumulation of phosphate and nitrogeneous compounds such as ammonia nitrate and nitrite to a toxic level which makes the water unfit for aquaculture. Macroalgae plays a vital role in controlling this toxic wastes to a reasonable and cultivable limits. Also, it improves the water quality by lowering pH, Increasing dissolved oxygen concentration and lowering biochemical oxygen demand. This aquaculture management can be made either through a polyculture system of marine organisms such as fish and shrimp with seaweeds or by recirculating the effluents from the culture tank to the treated tank supplement with seaweeds. To understand these problems, the present experiment was planned and encouraging results were achieved from the treatment of fish effluent and shrimp effluent by different seaweeds such as G.corticata. Ulva lactuca and Ulva reticulata. Ammonia, a major metabolite available in the fish and shrimp effluent was drastically reduced when treated with seaweeds. Both the seaweeds, G.corticata and U.lactuca used for the treatment of fish effluent reduced ammonia concentration from 13.29 to 2.1 and 2.33 pg atom/I respectively. On the other hand, the green algae Ulva reticulata treated with shrimp effluent and also cultured along with shrimp showed reduction of ammonia from 44 to lOpg atom/I in the earlier case and 320 to 22pg atom/I In the later case. The increase in phosphate content is a major problem in the fish effluent in closed aquaculture system. Removal of phosphate was found to be very slow in the present experiment from both fish and shrimp effluent.

    Item Type: Thesis (Masters)
    Uncontrolled Keywords: Seaweeds; Biofilter; Monitoring; Water quality; Aquaculture systems
    Subjects: Dissertations
    Algae > Seaweed
    Marine Fisheries > Monitoring
    Marine Environment > Water quality management
    Divisions: CMFRI-Kochi > Mariculture
    Subject Area > CMFRI > CMFRI-Kochi > Mariculture
    CMFRI-Kochi > Mariculture
    Subject Area > CMFRI-Kochi > Mariculture
    Depositing User: Mr Rakesh
    Date Deposited: 17 Sep 2016 04:29
    Last Modified: 06 Oct 2016 10:49
    URI: http://eprints.cmfri.org.in/id/eprint/11132

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