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Table 5 Shannon diversity index, species richness and equitability (evenness) of phytoplankton species within the cage area and at the intermediate site recorded before and after stocking of fish in cages

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

  Within the cage area Intermediate
Before After Before After
Richness 41 15 27 17
Diversity index 1.268 0.476 1.435 1.818
Equitability 0.341 0.176 0.435 0.642
  1. Generally, species richness decreased in both sites while diversity index decrease along the cage and increase at intermediate site. Equitability declined after stocking fish in cages within the cage area and increased at the intermediate site after stocking fish in cages