Supplemental effects of mixed ingredients and rice bran on the growth performance, survival and yield of Nile tilapia, Oreochromis niloticus reared in fertilized earthen ponds

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Table 2 Water quality parameters, phytoplankton biomass (chlorophyll a) and total abundance in Nile tilapia, Oreochromis niloticus ponds under mixed ingredients (MI) and rice bran (RB) treatments during the study period

Parameter	Diet type
Parameter	Mixed ingredients (MI) diet	Rice bran alone (RB) diet
Temperature (°C)	28.56 ± 0.68	28.19 ± 0.73
Dissolved oxygen (mg L⁻¹)	5.16 ± 0.51	4.75 ± 0.70
pH	6.34 ± 0.07	6.20 ± 0.08
Chlorophyll a (µg L⁻¹)	133.65 ± 39.22	121.29 ± 31.45
Total phytoplankton abundance (individuals L⁻¹)	10438.13 ± 1513.40	8913.30 ± 873.22

All measured parameters were not significantly different between the dietary treatments (temperature, t₍₅₄₎ = 0. 365, p = 0.716; dissolved oxygen, t₍₅₄₎ = 0.480, p = 0.634; pH t₍₅₄₎ = 1.252, p = 0.216); chlorophyll a (t₍₃₈₎ = 0.246, p = 0.807) and phytoplankton abundance (t₍₃₈₎ = t₍₁₅₂₎ = 0.884, p = 0.378)