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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Mar 2009, 29 (2)                                     Back


Ovarian development in Labeo dyocheilus (McClelland) during active

Physico-chemical and microbial characteristics of the coral reef environment of the Gulf of Mannar marine biosphere reserve, India

E. Kannapiran*1, L. Kannan2, A. Purushothaman3 and T. Thangarajdou3

1Department of Oceanography and Coastal Area Studies, Alagappa University, Thondi Campus, Thondi - 623 409, India

2Thiruvalluvar University, Vellore - 632 004, India

3Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai - 608 502, India

(Received: April 14, 2006 ; Revised received: November 20, 2006 ; Accepted: December 30, 2006 )

Abstract: Investigation on physico-chemical parameters and bacterial characteristics of the coral reef environs of the Gulf of Mannar biosphere reserve was studied. The study found the influence of different physico-chemical parameters on one another and also on the distribution of the total heterotrophic bacteria (THB) in the coral reef areas. Nutrients exhibited considerable seasonal and spatial variations with influence on the bacterial population. Coral reef areas recorded higher bacterial population density both in water (3.5 to 18 X 105 CFU ml-1) and sediment (1 to 14 X 107 CFU g-1) samples than the non coral reef areas (3.4 to 10.5 X 104 CFU ml-1in water and 0.9 to 7 X 106 CFU g-1). The study also found the dominance of gram negative groups at all the three stations (64.73, 63,5 and 72.59%) with Pseudomonas contributing maximum number of strains in all the samples. In addition Vibrio, Aeromonas, Flavobacterium, Cytophaga, Enterobacter and Alcaligenes were also recorded. The gram positive group was represented by Bacillus, Micrococcus, Arthrobacter and Corynebacterium. The generic composition of THB isolated from the coral mucus revealed the presence of Vibrio and Micrococcus in all the coral mucus.

Key words:Microbial characteristics, Coral reef, Biosphere reserve, Gulf of Mannar

PDF of full length paper is available with author (piran_k@yahoo.co.uk)

 

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