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Depuration of a freshwater clam (Batissa violacea) from Rewa River in Fiji using a bio - filter set-up in closed and open water circulatory system

Singh, Ashneel A. and Ram, Ravinesh and Kumar, Sheemal V. and Aashna, Sheenal and Verma, Shipaldika and Naaz, Zafiar T. and Hatha, Abdulla M. (2021) Depuration of a freshwater clam (Batissa violacea) from Rewa River in Fiji using a bio - filter set-up in closed and open water circulatory system. Nova Biotechnologica et Chimica, 20 (2). e824-e824. ISSN 1338-6905

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    Abstract

    The effectiveness of the freshwater bivalve Batissa violacea depuration was tested in closed and open water circulatory system over a 48 h period. The closed circulatory system included a sand biofilter. Microbial levels were assessed every 4 h using Total Aerobic Plate Count (TPC) for heterotrophs and Most Probable Number (MPN) for coliforms. TPC and coliform loads in bivalve tissue reduced rapidly to low and undetectable levels in a closed circulatory system while open system showed a slower reduction. Both TPC and coliform loads remained above detectable levels throughout the depuration period. Closed system showed similar patterns of logarithmic reduction of TPC and coliforms in all cases with R 2>0.95 and p<0.001. Similar results were observed for tank water however, reduction of TPC and coliforms were slower. Biofilm formation was observed in the interior walls of the aquarium tanks over 48 h in all cases. Physicochemical parameters did not show any significant change. The reduction in TPC and coliform load in B. violacea suggests that biofilter in a closed water circulatory system is a simple, cost-effective, water conserving and effective way to significantly reduce the spoilage and coliform bacterial load that is accumulated in the clams.

    Item Type: Journal Article
    Uncontrolled Keywords: Aerobic plate count, Batissa violacea, Biofilter, Bivalve, Coliform, Depuration
    Subjects: Q Science > Q Science (General) > Q1-390 Science (General)
    Q Science > QH Natural history > QH301 Biology
    Q Science > QL Zoology
    Q Science > QR Microbiology > QR180 Immunology
    S Agriculture > SH Aquaculture. Fisheries. Angling
    Divisions: School of Agriculture, Geography, Environment, Ocean and Natural Sciences (SAGEONS)
    Depositing User: Ashneel Singh
    Date Deposited: 17 Dec 2021 15:36
    Last Modified: 17 Dec 2021 15:36
    URI: http://repository.usp.ac.fj/id/eprint/13161
    UNSPECIFIED

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