Chrisollte, BSugumar, GVelayutham, PFelix, N2017-05-262017-05-262005-06http://krishikosh.egranth.ac.in/handle/1/5810012495Quantitative and qualitative analysis o( bacterial flora of samples of water and beach sand collected from four fish landing sites of Thoothukudi was done for one year from June 2003 to May 2004. Although the bacterial counts varied widely in water and sand samples from Thirespuram landing centre, Fishing harbour, South landing centre and Port beach landing centre, there was no marked seasonal variation. There was no significant relationship between heterotrophic bacterial density and physicochemical parameters (P> 0.05). The dissolved oxygen and ammonia levels varied considerably between landing centres indicating the extent of pollution. Quantitative analysis showed dominance of Gram positive over Gram negative bacteria in all samples except in sand samples from Thirespuram landing centre.ennullReprint