Dr. Selvakumar Dharmaraj

Dr. Selvakumar Dharmaraj |Clyto Access

Kumararani Meena Muthiah College of Arts and Science, India

Speaker

Expertise:

Biography:

Dr. Selvakumar Dharmaraj has obtained his Ph. D degree in Aquatic Biology and Fisheries in 2013 from University of Kerala, India. Currently he is working as Assistant Professor, PG Department of Biotechnology, Kumararani Meena Muthiah College of Arts and Science (Affiliated to University of Madras, India) with a total work experience of six years. He has been awarded Summer Research Fellowship for Teachers by Indian Academy of Sciences, India in the year 2014. He has got two review papers; twenty one original research articles published in international peer reviewed journals, two research articles and proceedings publications in national journals to his credit. He has published one book titled “Biotechnological applications of marine Streptomyces” Lambert Academic Publishing, Germany. He has saved as reviewer for journals like Marine Drugs, Food Research International, World Journal of Microbiology and Biotechnology, Bio-catalysis and Agricultural Biotechnology and Chinese Journal of Oceanology and Limnology. His field of research includes screening and characterization of Bioactive compounds, Food-grade pigments, Probiotics and Nanoparticle synthesis from microorganisms associated with marine sources like sponges, fishes and sediments.

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Presentation:

Title: Probiotics From Unexplored Marine Sources

Abstract:

Probiotics are live organisms which can benefit the host immunity by providing essential nutrients as growth supplements and also to increase resistance to infectious diseases of fish and shellfish. Some commercial probiotic products from sources like Bacillus sp., Lactobacillus sp., Enterococcus sp., Carnobacterium sp., S. cerevisiae and their applications are controlled by careful management recommendations. Usage of them is quite satisfactory yet new diseases arises day by day, lead to the search of new probiotics which is highly essential to improve the resistance of the host to fight against the emerging diseases in aquaculture. The gastrointestinal microbiota of fish and shellfish are peculiarly dependent on the external environment due to the continuous water flow passing through their digestive tract. Most bacterial cells in the gut are transient due to continuous intrusions of microbes coming from water and food. The use of probiotics is successful when the administered microbes survive in the gastrointestinal tract. On considering above facts, a study was carried out on the isolation and characterization of probiotic bacteria from unexplored marine sources like marine fish gut of non-edible pearl spotted grouper fish. Three probiotic bacterial strains (PSG01, PSG03, PSG04) were isolated and they exhibited excellent tolerance to acids and bile salts. The strains showed auto aggregation for longer time and it is appeared to be related to adhesion to intestinal epithelial cells. The strains also possessed antibacterial activity against fish pathogens like Aeromonas hydrophila, Serratia sp., and Vibrio spp. The isolated new probiotic strains from extreme environment can also serve as alternate to fishmeal which has become uncertain and highly priced. These non-edible fish gut associated bacteria have been hardly used as probiotics to the edible fishes and in near future they promises to be potential probiotics in aquaculture practices.

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Related Conferences :

Marine Science Research and Technology Conference