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

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Relation http://eprints.cmfri.org.in/12437/
https://link.springer.com/content/pdf/10.1007/s10499-015-9956-x.pdf
 
Title Effect of biofilm on water quality and growth of Etroplus
suratensis (Bloch, 1790)
 
Creator Shilta, M T
Chadha, N K
Pandey, P K
Sawant, Paramita Banerjee
 
Subject Tropical fish
Aquaculture
 
Description 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.
 
Publisher Springer
 
Date 2017
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/12437/1/Shilta_2017_Effect%20of%20biofilm%20on%20water%20quality%20and%20growth%20of%20Etroplus_Aquaculture%20International.pdf
Shilta, M T and Chadha, N K and Pandey, P K and Sawant, Paramita Banerjee (2017) Effect of biofilm on water quality and growth of Etroplus suratensis (Bloch, 1790). Aquaculture International, 24. pp. 661-674.