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Table 4 Associations between the proportional frequencies of the immatures of An. gambiae s.s. and An. arabiensis among sampling sites within a habitat and among larval breeding habitats as influenced by each physicochemical property of water during a category of rainfall in Banambani

From: Water quality and immatures of the M and S forms of Anopheles gambiae s.s. and An. arabiensis in a Malian village

Source

df

Young

Old

Total

 

χ 2

P

χ 2

P

χ 2

P

Alkalinity

1

-

-

0.70

0.404

0.45

0.503

Habitat

2

  

0.46

0.796

0.27

0.873

Site within a habitat

2

  

3.08

0.215

5.54

0.063

Category of rainfall

2

  

1.28

0.527

2.35

0.309

Conductivity

1

1.72

0.189

0.11

0.743

0.03

0.872

Habitat

2

2.68

0.262

0.01

0.993

0.28

0.869

Site within a habitat

2

7.63

0.022*

2.94

0.231

6.05

0.049*

Category of rainfall

2

1.70

0.427

1.32

0.518

2.59

0.273

Dissolved oxygen

1

-

-

1.00

0.317

1.75

0.186

Habitat

2

  

0.87

0.648

4.08

0.129

Site within a habitat

2

  

3.46

0.177

5.83

0.054

Category of rainfall

2

  

1.49

0.474

2.44

0.295

Nitrate

1

-

-

0.27

0.602

0.91

0.339

Habitat

2

  

0.11

0.946

1.28

0.526

Site within a habitat

2

  

2.20

0.333

4.91

0.086

Category of rainfall

2

  

1.25

0.536

1.89

0.389

Orthophosphate

1

1.33

0.249

2.34

0.126

2.00

0.157

Habitat

2

3.21

0.201

1.58

0.454

4.80

0.091

Site within a habitat

2

8.24

0.016*

0.88

0.645

4.38

0.112

Category of rainfall

2

0.68

0.713

1.38

0.501

2.48

0.289

pH

1

0.34

0.559

2.38

0.123

3.20

0.074

Habitat

2

1.08

0.583

0.30

0.861

1.34

0.511

Site within a habitat

2

7.71

0.021*

1.80

0.406

4.81

0.090

Category of rainfall

2

0.54

0.762

1.22

0.543

2.86

0.239

  Temperature

1

-

-

1.14

0.287

3.47

0.063

Habitat

2

  

0.40

0.817

2.65

0.265

Site within a habitat

2

  

1.58

0.454

5.90

0.052

Category of rainfall

2

  

1.44

0.486

4.38

0.112

TDS

1

2.00

0.157

0.24

0.626

0.02

0.895

Habitat

2

2.93

0.231

0.05

0.977

0.33

0.849

Site within a habitat

2

7.61

0.022*

3.17

0.205

5.77

0.056

Category of rainfall

2

1.98

0.371

1.31

0.521

2.63

0.268

Turbidity

1

-

-

2.27

0.132

2.57

0.109

Habitat

2

  

2.10

0.350

1.71

0.425

Site within a habitat

2

  

0.26

0.878

2.91

0.234

Category of rainfall

2

  

1.61

0.448

2.65

0.266

  1. * P < 0.05, "-" not applicable