STUDIES ON THE MICROBIAL POPULATION IN TILAPIA (OREOCHROMIS MOSSAMBICUS) IN MULLAI RIVER AT KADAMACODE AROUND KANYAKUMARI DISTRICT, TAMIL NADU, INDIAG. J. JENILA AND C. RADHA KRISHNAN NAIRAbstract The Present study was carried out for the analysis of microbes in different body parts of Tilapia (Oreochromis mossambicus) during the period of January 2008 to April 2008. Mullai river orginates from Kallemalai and it joins with the Tamaraparani river. The river gets water in the rainy season and becomes dry in the summer season. The predominant species of fish in the riverine system is Tilapia (Oreochromis mossambicus). It has its maximum production of four tones/year with regards to the present study that the total heterotrophic bacterial population of the fish affects the major production. The bacterial population was high in the operculum and fins that is Pseudomonas species (25x105cfu/mL) and E-coli species (15x105cfu/mL). In the fin the maximum count noticed is the pseudomonas species (40x105cfu/mL) and E-coli (20x105cfu/mL). The bacteria populated more in fins and operculum due to the presence of bacteria in water.
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