Anopheles stephensi: Effect of Gamma-Radiation and Chemosterilants on the Fertility and Fitness of Males for Sterile Male Releases13

Sharma, Vineeta; Razdan, R. K.; Ansari, M. A.

doi:10.1093/jee/71.3.449

Cited by 33 publications

(44 citation statements)

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“…The role played by the dose rate of ␥ rays (Gy/min) on the levels of induced sterility and possible somatic damage still needs to be investigated and clariÞed in the case of mosquitoes. Our reference rate was 2.2 Gy/min Ϯ 3.5%, which may be considered at the lower limit of the range reported in similar studies (1.9 Ð12.0 Gy/min) , Ali and Rozenboom 1972, Darrow 1968, Hallinan and Rai 1973, Helinski et al 2006, Sharma et al 1978, Smittle et al 1971a, Wijeyaratne et al 1977.…”

Section: Discussionmentioning

confidence: 44%

“…Therefore, the effect of ␥ rays on fecundity and fertility was higher for Ae. albopictus female pupae than for male pupae, as observed in other insect species (Bakry et al 2005), as well as in other mosquito species (Darrow 1968, Ali and Rozenboom 1972, Sharma et al 1978. This parameter is of relevance when sexing of male pupae is performed with methods that do not guarantee 100% efÞcacy and some sterile females are released as "impurity" together with sterile males.…”

mentioning

confidence: 97%

“…Anopheles pharoensis male pupae aged 15Ð20 h exposed to ␥ rays showed 100% sterility at 116 Gy. Irradiating with ␥ rays Anopheles stephensi male pupae aged 4 Ð28 h,Sharma et al (1978) observed a 99.1% sterility when using 120 Gy, whereasAndreasen and Curtis (2005) obtained 98.2Ð98.5% sterility using the same dose. Two-day-old Culex pipiens molestus male pupae were 99.1% sterilized when irradiated with 97.3 Gy of ␥ rays…”

mentioning

confidence: 98%

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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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Section: Discussionmentioning

confidence: 44%

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confidence: 97%

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confidence: 98%

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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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“…However, eliminating radiation may provide additional improvements. However, though radiation is generally highly damaging for mosquitoes [18,32,33], there may be exceptions [19] and the magnitude of the fitness penalty associated with genetic engineering, if any [34,35], is also somewhat controversial [34-38]. For density-dependent parameters estimated from field data for Aedes aegypti , the critical release ratio for population elimination is 27% to 540% greater for early-acting rather than late-acting lethality (540%, 210%, 270% and 27%, respectively, for the scenarios of Fig.…”

Section: Resultsmentioning

confidence: 99%

Late-acting dominant lethal genetic systems and mosquito control

et al. 2007

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Background: Reduction or elimination of vector populations will tend to reduce or eliminate transmission of vector-borne diseases. One potential method for environmentally-friendly, species-specific population control is the Sterile Insect Technique (SIT). SIT has not been widely used against insect disease vectors such as mosquitoes, in part because of various practical difficulties in rearing, sterilization and distribution. Additionally, vector populations with strong density-dependent effects will tend to be resistant to SIT-based control as the population-reducing effect of induced sterility will tend to be offset by reduced density-dependent mortality.

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“…SIT involves the mass rearing and release of sterile males which, upon mating with the native population, are unable to produce viable offspring and thereby drive the native population into decline or eradication [25, 26]. Sterilization of insects has been accomplished by irradiation or chemosterilization [27], with transgenic techniques recently being recognized as potential new methods for sterilization [23, 25, 28]. The successful employment of this technique to control important disease vectors and agricultural pests such as the screworm and the Mediterranean fruit fly has created optimism about its usefulness as a potential malaria control strategy [29, 30].…”

Section: Current and Past Approaches To Malaria Vector Controlmentioning

confidence: 99%

Challenges and Approaches for Mosquito Targeted Malaria Control

Ramirez¹,

Garver²,

Dimopoulos³

2009

CMM

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Malaria is one of today's most serious diseases with an enormous socioeconomic impact. While anti-malarial drugs have existed for some time and vaccines development may be underway, the most successful malaria eradication programs have thus far relied on attacking the mosquito vector that spreads the disease causing agent Plasmodium. Here we will review past, current and future perspectives of malaria vector control strategies and how these approaches have taken a promising turn thanks recent advances in functional genomics and molecular biology.

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Anopheles stephensi: Effect of Gamma-Radiation and Chemosterilants on the Fertility and Fitness of Males for Sterile Male Releases13

Cited by 33 publications

References 0 publications

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

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

Late-acting dominant lethal genetic systems and mosquito control

Challenges and Approaches for Mosquito Targeted Malaria Control

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