Micro-algal lethality potentials of marine organisms collected from the Indian littoral

Manilal, Aseer and Joseph, Selvin and Seghal Kiran, G and Sugathan, Sujith and Feby, F A S and Lipton, A P (2013) Micro-algal lethality potentials of marine organisms collected from the Indian littoral. Thalassas, 29 (2). pp. 59-65.


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    Microalgal lethality bioassay was developed to detect the toxic profile of organic extract of marine organisms and their possible significance in the context of antifouling activities. Organic extracts of seaweeds, Ulva fasciata and Hypnea musciformis, sponges, Dendrilla nigra, Axinella donnai and Clathria gorgonoides and a holothurian Holothuria scabra were used for the detection of microalgal lethality potential. The microalgae such as Isochrysis galbana, Chlorella salina and Nanochloropsis sp. were used for the assay. The findings revealed that H. scabra contained toxic secondary metabolites, which might have the reason for its potent antifouling activity. Invariably all extracts inhibited the growth of microalgae at various concentrations except H. musciformis and A. donnani, which induce the growth of microalgae to certain extent. Based on the present findings, it could be inferred that the ‘microalgal lethality bioassay’ could be used as a primary screening assay system for the detection of biotoxic and antifouling agents from marine organisms.

    Item Type: Article
    Uncontrolled Keywords: Sponge; Seaweeds; Holothuria; organic extract; Isochrysis galbana; Nanochloropsis sp.; Chlorella salina; Microalgal-lethality
    Subjects: Marine Environment > Marine Pollution
    Divisions: CMFRI-Vizhinjam
    Depositing User: Arun Surendran
    Date Deposited: 24 Feb 2014 09:01
    Last Modified: 09 Sep 2015 15:58
    URI: http://eprints.cmfri.org.in/id/eprint/9914

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