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Table 1 Mean dissolved oxygen, pH and Secchi depth (mean ± standard deviation) averaged on monthly basis

From: Environmental impacts of cage culture in Lake Victoria: the case of Shirati Bay-Sota, Tanzania

  pH DO (mg/l) Secchi depth (m)
Along the cages Control Intermediate Along the cages Control Intermediate Along the cages Control Intermediate
February Before stocking 5.28 ± 0.22 8.81 ± 0.43 5.25 ± 0.07 7.86 ± 132 8.56 ± 0.39 8.00 ± 1.30 1.21 ± 0.18 1.4 ± 0.17 1.16 ± 0.14
March After stocking 5.23 ± 0.27   5.21 ± 0.21 7.04 ± 0.77   7.33 ± 0.96 1.40 ± 0.36   1.46 ± 0.36
April 5.22 ± 0.16   6.05 ± 0.68 7.16 ± 0.51   7.39 ± 0.34 1.29 ± 0.19   1.38 ± 0.21
May 7.49 ± 0.90   6.61 ± 0.60 6.25 ± 0.43   6.65 ± 0.30 1.63 ± 0.27   1.67 ± 0.23
June 7.22 ± 0.53   7.17 ± 0.70 7.28 ± 0.54   7.74 ± 0.71 1.53 ± 0.29   1.40 ± 0.37
July 6.80 ± 0.32   6.51 ± 0.17 7.29 ± 0.20   7.51 ± 0.21 1.29 ± 0.27   1.33 ± 0.31
August 7.45 ± 0.62 8.89 ± 0.45 7.18 ± 0.59 6.90 ± 1.14 8.60 ± 0.29 7.05 ± 1.12 1.61 ± 0.40 1.57 ± 0.38 1.76 ± 0.43
Mean 6.57 8.89 6.45 6.99 8.60 7.28 1.46 1.57 1.50