Ecophysiology of Nontuberculous mycobacteria in Marine aquaculture ponds

Latha, M M (2004) Ecophysiology of Nontuberculous mycobacteria in Marine aquaculture ponds. PhD thesis, Cochin University of Science and Technology, Cochin.



1. Studies on the "Ecophysiology of Nontuberculous Mycobacteria in marine aquaculture ponds" was carried out based on the samples collected from aquaculture ponds and cultured tilapia(Oreochromis mossambicus) at Narakkal(Station I) and Valappu(Station II) during March 1999 to February2000. An account of NTM are given with Intensity charts and Tables. 2. Nontuberulous mycobacteria are relatively common aquatic environmental bacteria. This means that they can live in the aquatic environment and do not require the presence of fish or fish tissue to survive. They have been frequently isolated from coastal waters, sediments and aquaculture facilities. 3. The physico-chemical parameters except temperature was found to be fluctuating widely in both perennial (Station l) and pokkali(Station II) aquaculture ponds studied. The nutrient profile exhibited by station II showed that it is more fertile than Station l. 4. Mean TPC values from fish and environmental samples of pre monsoon, monsoon and post monsoon seasons of both the sites were varying with less count of heterotrophs in gill and liver tissues of the fish. 5. Post monsoon showed less TMC values compared to other two seasons. 6. Membrane filtration technique was found as effective in retrieving maximum TPC and TMC from samples of water. 7. Decontamination technique with 4% NaOH and further treatment with physiological saline recovered NTM from all the samples studied. 8. Both heterotrophic as well as mycobacterial occurrences were observed high in Narakkal. 9. Statistically significant positive and negative correlations observed in the study between heterotrophs, mycobacteria and physico-chemical parameters and within these parameters strongly indicating the overall biotic and abiotic interrelationships, which stabilizes microbial environment in aquaculture systems.

Item Type:Thesis (PhD)
Supervisor(s):Chandrika, V
Uncontrolled Keywords:Ecophysiology; Nontuberculous mycobacteria; Marine aquaculture; ponds
Subjects:Fish Biotechnology > Microbiology
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:7505
Deposited By:Dr. V Mohan
Deposited On:14 Feb 2011 14:42
Last Modified:20 Jan 2014 14:30

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