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

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	-	-	-	-	-