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Effect of biofilm on water quality and growth of Etroplus suratensis (Bloch, 1790)

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Title Effect of biofilm on water quality and growth of Etroplus
suratensis (Bloch, 1790)
Not Available
 
Creator Shilta,M T
Chadha,N K
Pandey,P K
Sawant,Paramita Banerjee
 
Subject Biofilm
Etroplus suratensis
Growth
Natural and artificial substrate
Water quality
 
Description Not Available
An experiment was conducted to compare the efficiency of biofilm production
in natural and artificial substrates and to study their effect on water quality and growth of
Etroplus suratensis. Four different substrates were used for biofilm formation: paddy straw
(T1), sugarcane bagasse (T2), polyvinylchloride (PVC) pipe (T3) and plastic sheet (T4).
The experiment was carried out in mud-bottomed fibre-reinforced plastic tanks (300 L) in
triplicates. About 3000 cm2 surface area (600 g) of each substrate was suspended in water
supplemented with fertilizers. Only cow dung and urea were applied in control tanks. The
tanks were stocked with 25 fishes with average weight of 9.1 ± 0.22 g. The overall mean
value of heterotrophic bacteria in substrate was found higher in straw followed by bagasse,
plastic and PVC. The dominant genera of bacteria in the substrate were Bacillus, Pseudomonas
and Micrococcus in that order of preponderance. The mean phytoplankton and
zooplankton density on the substrates were higher in bagasse followed by straw, plastic and
PVC. The biofilm developed on the substrate significantly reduced the ammonia nitrogen
and nitrite-nitrogen content of water. The growth of fishes was significantly (P \ 0.05)
higher in substrate-based treatments than that in the control with better results in bagasse
followed by straw, plastic and PVC. The conclusions of the present study are that biofilm
produced on natural substrates, especially on bagasse, enhanced growth of E. suratensis
and reduced the necessity of water exchange during the culture, which certainly decreases
the cost of Etroplus production.
Not Available
 
Date 2021-09-17T07:59:36Z
2021-09-17T07:59:36Z
2017
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/63836
 
Language English
 
Relation Not Available
 
Publisher Springer