Mark-Release-Recapture (MRR) of Sterile Male Aedes albopictus (Skuse) in Sri Lanka: Field Performance of Sterile Males and Estimation of the Wild Mosquito Population Density

Dengue is an important mosquito-borne disease in Sri Lanka. The Sterile Insect Technique (SIT) is an environment-friendly and novel method that can suppress dengue vector mosquitoes in Sri Lanka. This study aimed to evaluate the field performance of sterile males and the density of wild male (Skuse)...

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Bibliographic Details
Published in:Insects (Basel, Switzerland) Switzerland), 2024-06, Vol.15 (7), p.466
Main Authors: Hapugoda, Menaka, Gunawardena, Nilmini Silva, Ranathunge, Tharaka, Bouyer, Jeremy, Maiga, Hamidou, Karunathilake, Kankanige, Withanage, Gayan Parakrama, Weerasinghe, Indika, Sow, Bazoumana B D, Harishchandra, Jeevanie
Format: Article
Language:English
Subjects:
Aedes albopictus
Aquatic insects
Cobalt
Community
Competitiveness
Control methods
dengue
Dengue fever
Eggs
Females
Fertility
Fluorescence
Gamma rays
Humidity
Insects
Life expectancy
Life span
Male sterility
Males
Mosquitoes
Performance evaluation
Pest control
Population density
Population number
Population studies
sterile insect technique
sterile male mosquitoes
Sterility
Sterilized organisms
Vector-borne diseases
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Summary:Dengue is an important mosquito-borne disease in Sri Lanka. The Sterile Insect Technique (SIT) is an environment-friendly and novel method that can suppress dengue vector mosquitoes in Sri Lanka. This study aimed to evaluate the field performance of sterile males and the density of wild male (Skuse) using a Mark-Release-Recapture (MRR) assay. Laboratory-colonized male pupae were exposed to 50 Gy gamma using a Co source. Sterile males (approx. 10,000) marked with fluorescent dust were released weekly for 4 consecutive weeks (January-February 2021) in a geographically isolated 30 ha site in Gampaha. Results show sterile males could disperse up to 543.8 m with a mean distance of 255.1 ± 44.6 m and survive up to 6 days with a mean life expectancy of 3.55 ± 2.32 days. A high field mating competitiveness of sterile males based on a Fried value of 0.47 ± 0.007 and significant induced sterility in the wild eggs in the second generation were found. The mean wild male mosquito population density was 163 males/ha. The data generated will be useful for designing future trials in Sri Lanka and other countries with similar situations.
ISSN:2075-4450
2075-4450
DOI:10.3390/insects15070466