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Evaluation of the microbial population from recirculating marine aquarium

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Author(s): Pitchaikkaran Raja | Shanmugam Velmurugan | Marimuthu Natarajan | Santhanam Rajagopal

Journal: Advances in Environmental Sciences
ISSN 2066-7620

Volume: 1;
Issue: 1;
Start page: 55;
Date: 2009;
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Keywords: marine aquarium | disease | microbes | ornamental fishes | MIS gas chromatography

ABSTRACT
Marine ornamental fishes are the most beautiful and fascinating creatures of the aquaticenvironment. Ornamental fish keeping has developed into a hobby and ranks next to photography.These fishes are facing more problems from microbial pathogens. To prevent disease outbreaks, it isimportant to understand how diseases are occurring. Therefore an attempt was made to study thebacterial population, pathogenic bacteria identification and nitrogen concentration in the aquariumwaters. The observed ammonia values ranged from 0.031 to 0.144 Mg L-1, nitrite from 0.014 to 0.314Mg L-1 and nitrate from 0.793 to 69.821 Mg L-1. The total bacterial counts of the water samples rangedfrom 5.4 x 102 to 2.1 x 107 CFU mL-1. The maximum bacterial count was found in the storage tankwater sample (2.1 x 107 CFU mL-1) and the minimum bacterial count was found in the healthy tanksample (5.4 x 102 CFU mL-1). The most dominant colonies were Escherchia coli, Vibrio sp.,Pseudomonas sp., Enterobacter sp. and Bacillus sp. Among these, diseased aquarium tank microbesused for the further identification. Of these the most predominant species (Vibrio parahaemolyticus,Bacillus subtilis and Bacillus licheniformis) were identified based on the MIS gas chromatography.
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