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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)

From: Radiation biology of mosquitoes

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. 1 Laboratory irradiated males competed against wild males for wild females under laboratory conditions.
  2. 2Fertile and sterile batches averaged for the three replicates.
  3. 3Small cage results only.