Release of sterile Aedes aegypti mosquitoes: chilling effect on mass-reared males survival and escape ability and on irradiated males sexual competitiveness

In the sterile insect technique, it is important to measure the impact of mass-rearing and handling of sterile males to allow a successful control of the target wild population. This study evaluates the effect of pre-release chilling on the survival, escape ability, and sexual competitiveness of mal...

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Bibliographic Details
Published in:Scientific reports 2023-03, Vol.13 (1), p.3797-3797, Article 3797
Main Authors: Sánchez-Aldana-Sánchez, Génesis Alejandra, Liedo, Pablo, Bond, J. Guillermo, Dor, Ariane
Format: Article
Language:English
Subjects:
631/601/1466
631/601/18
631/61/17
Aedes
Aedes aegypti
Animals
Aquatic insects
Chilling
Cold Temperature
Competitiveness
Culicidae
Humanities and Social Sciences
Male
Male sterility
Males
Mass rearing
Mosquito Control
Mosquitoes
multidisciplinary
Pest control
Pest Control, Biological
Population studies
Science
Science (multidisciplinary)
Sterilized organisms
Survival
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Summary:In the sterile insect technique, it is important to measure the impact of mass-rearing and handling of sterile males to allow a successful control of the target wild population. This study evaluates the effect of pre-release chilling on the survival, escape ability, and sexual competitiveness of male Aedes aegypti . To determine survival and escape ability, mosquitoes were chilled at 4 °C using four different treatments of either one exposure (25 min) or two consecutive exposures (25 + 25 min, 25 + 50 min, 25 + 100 min). For sexual competitiveness, two different treatments were evaluated, chilling for 25 min once and twice. Results showed that the longest exposure to chilling caused a significant reduction of survival time, from 67 to 54 days. Escape ability was reduced by the first chilling from 25 to 7% and with the second chilling, it was reduced from 30 to 24% in the control to 4.9, 2.0 and 0.5% for 25, 50 and 100 min, respectively. Sexual competitiveness index was reduced from 1.16 in the control, to 0.32 and − 0.11 for treatments involving one and two chilling periods, respectively. It is recommended to increase the chilling temperature and reduce the exposure time to reduce the harmful effects on sterile males.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-30722-9