Abstract
<p>Effect of vermicompost, poultry manure, cow dung and pig manure used to monitor on microbial population in carp rearing pond water of Indian carp <em>fviz</em>. <em>Catla catla, Labeo rohita</em> and <em>Cirrhinus mrigala</em>. The fingerlings stocked @ 30 fish per pond in the ratio of 3 : 4 : 3. The bacterial strains isolated in ponds water treated with different manures were seven gram negative (<em>A. hydrophilla</em>, <em>E. coli</em>, <em>E. aerogens</em>, <em>Shigella</em> sp., <em>K. oxytoca</em>, <em>P. aeruginosa</em>, <em>P. fluorescens</em>) and three gram positive (<em>M. luteus</em>, <em>S. aureus</em> and <em>Streptococcus</em> sp.). The average counts of heterotrophic pathogenic bacteria in poultry manure founded to be maximum in decreasing order followed by pig manure, cow dung, vermicompost, vermicompost and control, respectively. However, bacteria, <em>E. aerogens</em>, <em>P. fluorescens</em>, <em>P. aeruginosa</em>, <em>Shigella</em> sp., <em>K. oxytoca</em> and <em>Streptococcus</em> sp. found absent in vermicompost treatments. All the three species gained maximum growth in vermicompost followed by cow dung &gt; poultry manure and pig manure.</p>
Highlights
More than half of the world population depends upon fish as a source of animal protein
The pathogenic heterotrophic A. hydrophila, E. coli, M. luteus, S. aureus bacteria presented in treatment control, pig manure, poultry manure, cow dung, vermicompost @ 10,000 and vermicompost @ 15,000 kg/ha/yr
In the present investigation seven-gram negative and three gram positive heterotrophic pathogenic bacterial strains isolated from different manure treated fish ponds
Summary
More than half of the world population depends upon fish as a source of animal protein. The inclusion of fish in our diet can make a valuable contribution to any diet that contains mainly of cereals, starchy roots and sugar for the healthy growth[2]. Among the various practices, depending upon the variable inputs, semi-intensive carp culture practices in rural aquaculture involve utilization of various organic manures for plankton production. These manures are either directly utilized by the fish or they enrich the aquatic ecosystem with autotrophic (plankton) and heterotrophic microbial
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