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Planktonic Luminous Bacteria of Vellar Estuary, South India
Author(s) -
Ramesh A.,
Venugopalan V. K.
Publication year - 1989
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19890740608
Subject(s) - estuary , salinity , vibrio , bacteria , plankton , vibrio harveyi , biology , monsoon , population , ecology , oceanography , geology , genetics , demography , sociology
Distribution of planktonic luminous bacteria in relation to environmental parameters was investigated at two stations located in the Vellar Estuary. Luminous microflora showed a pronounced seasonal cycle with very low counts during monsoon months followed by an increase in post monsoon and peak counts during summer. The population density of these procaryotes was remarkably high ranging from 3.5 to 33.1 colony forming units per ml. They constituted 2.1 to 52.1 % of the total bacterial counts. Salinity appeared to govern the distribution of luminous procaryotes as their counts corresponded well with fluctuations in salinity. Taxonomic affiliation of the isolates revealed predominance of Vibrio harveyi . Vibrio fischeri and Photobacterium leiognathi exhibited sparse distribution.