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Table 2 Identification and enzyme activities of the pure bacterial isolates isolated from samples collected from water tanks and wastes in RAS populated with Tilapia or Clarias. (+) indicates positive and (-) indicates negative enzyme activities

From: Comparison of two commercial recirculated aquacultural systems and their microbial potential in plant disease suppression

Number of the isolate Identification Collection site Amylase activity Protease activity Phosphatase activity Cellulase activity Siderophore production
1 Pseudomonas fluorescens Tilapia water tank + + + - +
2 Pseudomonas fluorescens Tilapia water tank - + + - -
3 Pseudomonas fluorescens Tilapia wastes + - + + -
4 Pseudomonas veronii Tilapia wastes + - + + +
5 Variovorax paradoxus Tilapia wastes + - - - -
6 Pseudomonas fluorescens Clarias water tank + + + + +
7 Pseudomonas fluorescens Clarias wastes - + + + +
8 Pseudomonas fluorescens Clarias wastes - + + - +
9 Variovorax spp. Clarias wastes - - - - -