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Table 6 Water quality parameters (Based on daily measurements)

From: Effect of water temperature on protein requirement of Heteropneustes fossilis (Bloch) fry as determined by nutrient deposition, hemato-biochemical parameters and stress resistance response

Parameters

Temperatures (°C)

18 °C

26 °C

Temperature (C)

20.1 ± 0.3

26.2 ± 0.1

Dissolved oxygen (mg/L)

7.1 ± 0.2

6.7 ± 0.4

pH

7.6 ± 0.3

7.2 ± 0.2

Free CO2 (mg/L)

5.7 ± 0.5

6.3 ± 0.5

Total alkalinity (mg/L)

74.9 ± 0.7

75.6 ± 0.4

Total NH3-N (mg/L)

0.02 ± 0.01

0.03 ± 0.01

Nitrite (NO2, mg/L)a

–

–

  1. Mean ± SD (n = 183). Recorded thrice daily at 07:00, 12:00, and 17:30 h
  2. aUndetectable