Table 2

Competitiveness studies performed on Anopheles mosquitoes under laboratory conditions. The ratio of irradiated males (I ♂) competing with un-irradiated males (U ♂) for un-irradiated females (U ♀) is given. Insects were irradiated in air. Stage of irradiation is pupa (P) or adult (A). Where eggs were collected en masse, the competitiveness value (C) is calculated according to the Fried index ([51]; see text). In the lower part of the table data were collected by individual egg batches and C = (Sterile batches/Fertile batches) * (Number un-irradiated males/Number of sterile males)

I♂

U♂

U♀

Dose (Gy)

Species

Stage

Age (hrs)

Hatch (%)

C value

Ref.

Obs.

Exp.

1

1

1

120

An. pharoensis

P

20-24

39

34

0.72

[60]

5

1

1

20

11

0.47

10

1

1

4

6

1.58

15

1

1

1

4

4.40

10

1

1¹

6

7

1.03

1

1

1

118

An. quadrimaculatus

P

24

74

48

0.30

[42]

2

1

1

85

32

0.06

3

1

1

42

24

0.43

4

1

1

53

19

0.20

6

1

1

42

14

0.21

10

1

1

28

9

0.24

1

1

1

80

An. stephensi

P

4-28

54

50

0.88

[57]

1

1

1

120

66

50

0.51

# Batches

C value

Fertile

Sterile

1

1

1

120

An. gambiae s.s.

P

0-7

30

7

0.24

[47]²

1

1

1

P

24-32

22

10

0.47

1

1

1

A

< 24

24

26

1.06

1

1

1

A

> 24

21

23

1.10

1

1

1

120

An. stephensi

P

0-7

32

6

0.20

1

1

1

P

24-32

29

9

0.32

1

1

1

A

< 24

22

22

1.07

1

1

1

A

> 24

19

24

1.35

1

1

1

70

An. arabiensis

P

20-26

102

73

0.76

[61]³

1

1

1

120

P

20-26

141

43

0.34

1

1

1

70

A

< 24

80

69

0.85

1

1

1

120

A

< 24

114

59

0.54

1

1

1

120

P

23-27

14

6

0.43

[39]

1

1

1

120

An. gambiae s.s.

P

22-27

20

14

0.70

1

1

1

A

< 24

39

48

3.20

¹ Laboratory irradiated males competed against wild males for wild females under laboratory conditions.

²Fertile and sterile batches averaged for the three replicates.

³Small cage results only.

Helinski et al. Malaria Journal 2009 8(Suppl 2):S6   doi:10.1186/1475-2875-8-S2-S6