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Table 3 Habitat dynamics, productivity and diversity of Anopheles larval habitats sampled over 12 months in three ecologically varied villages in the Mwea Rice Irrigation Scheme (April 2004 - March 2005)

From: Anopheles larval abundance and diversity in three rice agro-village complexes Mwea irrigation scheme, central Kenya

Village Habitat type # Habitats sampled % Larval habitats had water # Sampled % Larval habitats positive for Anopheles larvae % Anopheles larvae alone Larval density (no./10 dips) Pupal density (no./10 dips)
Mbui Njeru ("Planned" rice cultivation; >80% area under rice) Canal 19 83.0 225 31.6 13.7 1.1 0.0
  Marsh 6 19.5 17 47.1 21.2 1.7 0.2
  Rice field 80 57.6 545 46.8 28.4 2.2 0.4
  Temporary pool 96 14.4 374 36.1 30.5 2.4 0.2
  Water reservoir 2 23.1 6 16.7 5.7 0.4 5.6
Kiamachiri ("Unplanned" rice cultivation; ≈ 25% area under rice) Canal 30 62.7 330 39.7 16.6 1.9 0.2
  Marsha 27 48.3 193 48.7 18.3 2.1 0.3
  Rice field 108 52.7 749 56.3 35.2 4.1 0.2
  Temporary poolb 59 50.0 423 44.9 23.8 2.8 0.4
  Water reservoirc 2 46.2 24 25.0 5.8 0.7 0.7
Murinduko (Subsistence farming; < 5% area under rice on valley bottoms) Canal 9 97.1 133 65.4 12.4 6.7 0.7
  Marsh 22 85.7 162 79.6 14.5 7.8 2.7
  Rice field 83 86.4 1126 69.3 16.3 8.8 0.7
  Rock pool 4 35.5 11 72.7 10.9 5.9 15.9
  Stream pool 10 93.9 108 76.9 15.8 8.5 0.6
  Temporary pools 35 90.7 234 76.9 18.3 9.9 0.6
  Tree hole 3 44.4 4 75.0 5.3 2.9 3.8
  Water reservoir 4 61.1 21 28.6 6.3 3.4 21.6
  1. a Marshes included seeps and swamps; b Temporary pools were represented by hoof prints, ditches, puddles, pits, tire tracks and quarries; c Water reservoirs represented tanks and wells