✦ LIBER ✦

Spatial and seasonal distribution of heterotrophic bacteria in pond water and sediments under different management practices

✍ Scribed by B. B. Jana; U. K. De

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 565 KB
Volume: 75
Category: Article
ISSN: 1434-2944
DOI: 10.1002/iroh.19900750506

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✦ Synopsis

Abstract

Population densities and generation time of heterotrophic bacteria were estimated in water and sediments of fish ponds used for polyculture, monoculture and traditional systems of fish farming over a period of two and a half years. Spatial differences in microbial densities in the ponds were related to the organic loadings of the farm site and farm management. A number of environmental factors such as nitrogen, dissolved organic carbon, bicarbonate and phosphate of water were found to be responsible for the seasonal changes of heterotrophic bacteria in these ponds.

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Population densities of primarily iron precipitating heterotrophs (metal-precipitating nonoxidizing bacteria) were eatimated in water and sediments of ponds being used for polyculture, monoculture and traditional systems of fish farming over a period of two and a half years. Spatial differences in m