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Table 2 The abundance of early and late anopheline larvae within habitats covered with different vegetation types in Fort Ternan, Lunyerere and Nyalenda during the 2 years of weekly sampling

From: A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environmental settings in western Kenya

Site

Dominant vegetation cover

Weekly sampling (%)

Early instars (EMM ± SE)

OR

P

Late instars (EMM ± SE)

OR

P

Fort Ternan

None

5.8

0.152 ± 0.047

1

 

0.096 ± 0.044

1

 
 

Algae

1.3

0.417 ± 0.097

2.181

0.014

0.292 ± 0.091

1.622

0.297*

 

Grass

66.5

0.369 ± 0.014

2.075

< 0.001

0.304 ± 0.013

2.500

< 0.001

 

Others

26.4

0.433 ± 0.022

2.432

< 0.001

0.306 ± 0.021

2.401

< 0.001

Lunyerere

None

9.5

0.096 ± 0.035

1

 

0.073 ± 0.034

1

 
 

Algae

3.6

0.233 ± 0.056

2.184

0.008

0.161 ± 0.055

1.985

0.060*

 

Agricultural crops

9.5

0.354 ± 0.035

3.214

< 0.001

0.321 ± 0.035

3.861

< 0.001

 

Grass

66.4

0.486 ± 0.013

4.369

< 0.001

0.452 ± 0.013

5.436

< 0.001

 

Others

0.2

0.683 ± 0.272

6.378

< 0.001

0.346 ± 0.268

3.813

0.142*

 

Papyrus reeds

10.9

0.222 ± 0.032

2.018

0.003

0.196 ± 0.032

2.359

0.002

Nyalenda

None

6.5

0.313 ± 0.044

1

 

0.241 ± 0.040

1

 
 

Algae

3.5

0.610 ± 0.059

2.056

< 0.001

0.350 ± 0.056

1.318

0.208*

 

Agricultural crops

3.4

0.544 ± 0.060

1.847

0.001

0.270 ± 0.057

1.038

0.889*

 

Grass

62.8

0.614 ± 0.014

2.076

< 0.001

0.326 ± 0.013

1.214

0.207*

 

Others

18.4

0.517 ± 0.026

1.746

< 0.001

0.314 ± 0.024

1.159

0.379*

 

Papyrus reeds

5.4

0.739 ± 0.048

2.507

< 0.001

0.249 ± 0.046

0.889

0.620*

  1. *No significant difference with plots without vegetation cover. OR = Odds ratio; P = Level of significance; EMM = estimated marginal means; SE = standard error of the mean