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Table 1 Larva and pupa numbers by type of container and presence or absence of fish in water containers

From: “Where we put little fish in the water there are no mosquitoes:” a cross-sectional study on biological control of the Aedes aegypti vector in 90 coastal-region communities of Guerrero, Mexico

Container With fish Without fish
N Larvae* Pupae** N Larvae* Pupae**
Water storage containers 2200 mean = 0.04
SD = 0.786
mean = 0.01
SD = 0.196
36,886 mean = 0.96
SD = 12.15
mean = 0.174
SD = 2.81
Garrafónes a - - - 3293 mean = 0.027
SD = 0.739
mean = 0.002
SD = 0.067
Cacharros a - - - 292 mean = 1.207
SD = 6.43
mean = 0.094
SD = 0.714
  1. * p = 0.0004, t-test comparing containers with and without fish
  2. ** p = 0.006, t-test comparing containers with and without fish
  3. a Garrafones are plastic water bottles of 5-20 l capacity and cacharros are waste materials with a shape allowing water to accumulate in them. Fish cannot be placed in either of these water containers.