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Table 2 Mean physico-chemical parameters against duration of study (days)

From: Effects of water physico-chemical parameters on tilapia (Oreochromis niloticus) growth in earthen ponds in Teso North Sub-County, Busia County

Period of study

Dissolved oxygen (mg/L)

(Mean ± SD)

Temperature

(°C)

(Mean ± SD)

pH

(Mean ± SD)

Conductivity

(μS/cm)

(Mean ± SD)

Ammonia (mg/L)

(Mean ± SD)

Day 0

9.29 ± 4.22A

23.7 ± 0.75B

6.79 ± 0.38A

72.7 ± 18.8A

0.02 ± 0.01CD

Day 14

7.69 ± 7.15AB

25.1 ± 2.93B

6.62 ± 0.33A

44.3 ± 34.2A

0.01 ± 0.01B

Day 28

6.30 ± 2.97AB

23.3 ± 0.61B

6.46 ± 0.40BC

76.4 ± 28.1BC

0.04 ± 0.06D

Day 42

6.93 ± 5.34AB

23.2 ± 2.40B

6.66 ± 0.23B

57.3 ± 26.1B

0.01 ± 0.01BC

Day 56

6.99 ± 4.30B

22.9 ± 1.63A

6.35 ± 0.26A

59.2 ± 25.1A

0.031 ± 0.04CD

Day 70

5.33 ± 3.83B

25.0 ± 3.01A

6.53 ± 0.46A

73.3 ± 12.4A

0.01 ± 0.02A

Day 84

5.44 ± 5.79AB

25.6 ± 2.43A

6.87 ± 0.81BC

83.8 ± 29.5BC

0.09 ± 0.06CD

Day 98

6.37 ± 6.03A

25.5 ± 2.91A

6.70 ± 0.52D

57.5 ± 20.1D

0.02 ± 0.02CD

Day 112

8.73 ± 8.09AB

25.7 ± 2.53A

6.68 ± 0.21CD

42.6 ± 36.9CD

0.01 ± 0.05D

F statistic

2.02

8.71

4.86

9.92

18.0

P value

0.0437

0.0001

0.0001

0.0001

0.0001

  1. Means with different supercripts in the same column are significantly different at P<0.05 (Data analyzed by Duncan's Multiple Range Test)