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Table 2 Step-by-step calculation of mean distance travelled (MDT) of Anopheles arabiensis males

From: Participation of irradiated Anopheles arabiensis males in swarms following field release in Sudan

 

Annulus

 

1

2

3

 

A. Radius inner (km)

0

0.075

0.150

 

B. Radius outer (km)

0.075

0.150

0.225

 

C. Area (km)

0.017672

0.053015

0.088358

 

D. Area total

   

0.159044

E. Number of trap

3

3

3

 

F. Total of traps

9

   

G. CF = (C/D) × F

1

3

5

 

H1

43

31

0

 

I1. ER1 = (H1/E) × G

14.333

31

0

 

H2

67

6

25

 

I2. ER2 = (H2/E) × G

22.333

6

41.666

 

H3

58

48

25

 

I3. ER3 = (H3/E) × G

19.333

48

41.666

 

J. Sum of ER

56

85

83.333

 

K

   

224.333

L. Distance (A + B)/2

0.05

0.15

0.25

 

M.

2.8

12.75

20.833

 

N

   

36.383

  1. A: inner and B: outer radii of each annulus are recorded as A and B, C: area of each annulus, D: total area of the annuli, E: number of recapture sites in each annulus, F: the total number of traps, G: correction factor for each annulus, Hn: number of An. arabiensis recaptured in each annulus for the release day n, In: ERn estimated recaptures for the release day n, J: sum of ERn for each annulus, K: annuli sums totalled, L: median distance of each annulus, M: median distance (L) multiplied by its respective J, N: sum of M. MDT is calculated by the formula N/K.
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Malaria Journal

ISSN: 1475-2875

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