Studies on the Eradication of Anopheles pharoensis by the Sterile-Male Technique Using Cobalt-60. III. Determination of the Sterile Dose and Its Biological Effects on Different Characters Related to ‟Fitness” Components

Abdel-Malek, A. A.; Tantawy, A. O.; Wakid, A. M.

doi:10.1093/jee/60.1.20

Cited by 28 publications

(31 citation statements)

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“…Furthermore, a comparison of un-irradiated males with late CP male pupae irradiated at 40 Gy failed to detect an effect of irradiation on adult emergence rates (Figure 2 ). Results are consistent with previous studies that demonstrate high (>90%) adult emergence rates when mosquito pupae were irradiated at 16 hrs post pupation or older [ 12 , 14 ]. Overall, data suggests irradiation has no effect on adult emergence.…”

Section: Discussionsupporting

confidence: 92%

“…SIT programs rely upon the delivery of sterile males that are competitive with wild type males for mates. Prior attempts based upon irradiation to sterilize males often resulted in the decreased fitness of release individuals [ 12 - 17 ]. While fitness decrease can be less of a problem with chemosterilization, concerns regarding non-target and environmental effects have led to their disuse [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

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Integration of irradiation with cytoplasmic incompatibility to facilitate a lymphatic filariasis vector elimination approach

2009

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Integration of irradiation with cytoplasmic incompatibility to facilitate a lymphatic filariasis vector elimination approach

2009

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“…pharoensis pupae (males and females) in the range 4.8 Ð 68 Gy, found no reduction in longevity in comparison with nontreated pupae. Abdel-Malek et al (1967), working with An. pharoensis male pupae aged 15Ð20 h exposed to ␥ ray doses in the range 97Ð126 Gy, found slight effect on adult longevity (males and females).…”

Section: Discussionmentioning

confidence: 99%

γ Ray Dosimetry and Mating Capacity Studies in the Laboratory on <I>Aedes albopictus</I> Males

Balestrino

Medici

Candini

et al. 2010

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In Italy, Aedes albopictus Skuse is currently recognized as the most dangerous mosquito, and as currently applied conventional control methods gave unsatisfactory results, we are developing alternative strategies such as the sterile insect technique. To find the optimal sterilizing dose, male pupae were exposed to different doses of gamma rays in the range 20-80 Gy, generated by a Cesium-137 source. The effects of male pupal age at irradiation and gamma ray dose on adult male emergence, sterility level, longevity, and mating capacity were evaluated, and dose-response curves of residual fertility were calculated. Radiation tests were also performed on female pupae to observe their reproductive capacity in case of accidental release. Results confirmed that the age at which the male pupa is irradiated is an important factor that affects the longevity of the adult, whereas the effect of age on the induced sterility level is less pronounced. When male pupae older than 30 h were irradiated, the longevity of the adults was not affected by doses up to 40 Gy. The 40-Gy dose appeared sufficient to induce high level of sterility (>99%) at any male pupal age for all the strains tested. The duration of coupling and the number of mated females per male appeared to be affected by the radiation received by male pupae only at doses higher than 40 Gy. The female pupae were more sensitive to radiation than male pupae, with strong reduction in fecundity and fertility at 20 Gy and complete suppression of oviposition at higher doses.

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“…Currently, SIT projects are being developed for application to Anopheles arabiensis Patton, the malaria vector on Réunion Island and along the Nile in Sudan (IAEA, 2001), and might be appropriate for suppression of ecologically isolated ‘urban island’ populations of Anopheles in India and Nigeria (Curtis & Andreasen, 2000). Fitness of sterilized males for SIT release is a crucial factor with mosquitoes (El‐Gazzar & Dame, 1983; El‐Gazzar et al ., 1983), especially the delicate anophelines (Abdel‐Malek et al ., 1967; Sharma et al ., 1978). Considering the rising interest in transgenic mosquitoes (Takken & Scott, 2003) for control of vector‐borne diseases, Benedict & Robinson (2003) suggested that, for precautionary reasons, the first experimental releases of transgenics should be radio‐sterilized.…”

Section: Introductionmentioning

confidence: 99%

“…Few investigations have studied the problem of reduced fitness after radiation sterilization of mosquitoes (Abdel‐Malek et al ., 1967; Smittle et al ., 1968; Patterson et al ., 1975; Sharma et al ., 1978). Results obtained by Curtis (1976–1977) from limited experiments on sterilization of male Anopheles arabiensis and An .…”

Section: Introductionmentioning

confidence: 99%

Optimal life stage for radiation sterilization of Anopheles males and their fitness for release

Andreasen

Curtis

2005

Medical Vet Entomology

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Mating by male Anopheles mosquitoes (Diptera: Culicidae) was evaluated in the laboratory to assess fitness effects of radio-sterilization applied during different life stages of the malaria vectors An. stephensi Liston and An. gambiae Giles sensu stricto. After reproductive sterilization by gamma-irradiation (120 Gy), equal proportions of sterile and fertile (unirradiated) male adults were released into cages with virgin females and allowed to compete for matings. Radio-sterilization was applied when the males were pupae aged 0-7 h or 24-32 h, or adults aged <24 h or 24-55 h. After being radio-sterilized in the adult stage, males of both species competed effectively with unirradiated males, whereas those sterilized in the pupal stage obtained significantly fewer matings than unirradiated males from the same cohort. There was no evidence of females obtaining multiple inseminations. These findings emphasize the need to radio-sterilize males as adults in order to minimize the fitness cost. Such males may be intended for sterile insect technique population suppression or for trial releases of transgenic anophelines.

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Studies on the Eradication of Anopheles pharoensis by the Sterile-Male Technique Using Cobalt-60. III. Determination of the Sterile Dose and Its Biological Effects on Different Characters Related to ‟Fitness” Components

Cited by 28 publications

References 0 publications

Integration of irradiation with cytoplasmic incompatibility to facilitate a lymphatic filariasis vector elimination approach

Integration of irradiation with cytoplasmic incompatibility to facilitate a lymphatic filariasis vector elimination approach

γ Ray Dosimetry and Mating Capacity Studies in the Laboratory on <I>Aedes albopictus</I> Males

Optimal life stage for radiation sterilization of Anopheles males and their fitness for release

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