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Table 2 The mean concentrations (Mean ± SD) of nutrients values sampled along the cages (n = 4), at the intermediate site and the control site before and after stocking of fish in cages

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

Duration Month Location TN Nitrate nitrogen Nitrite nitrogen TP SRP Ammonia nitrogen Chl a
(µg/l)
Before stocking February AC 482.31 ± 3.1 70.8 ± 9.6   89.8 ± 3.7 11.62 ± 0.9 168.3 ± 22.0 7.4 ± 2.3
Intermediate 475.07 72.88   86.88 11.09 176 12.8
Control 736.6 19.3   131.3 119.3 21.3 40.16
After stocking March AC 693.2 ± 96.3 81.6 ± 10.9   94.4 ± 25.1 15.9 ± 17.7 140.5 ± 70.9 2 ± 9.9
Intermediate 728.38 76.75   76.24 5.3 112.25 3.64
August AC 1034.5 ± 282.0 137.2 ± 26.6 4.25 ± 1.5 106.8 ± 24.5   365 ± 126.2 1.902 ± 0.04
Intermediate 748.2 113 4 92   328 1.94
   Control 985.6 32.9 1.3 151.1 125.8 294.0 32.59
  1. Values recorded along the cages are averaged along the sampling locations
  2. TN Total Nitrogen, TP Total phosphorus, SRP Soluble reactive phosphorous, Chl a Chlorophyll a, AC along the cages