A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture
Abstract Background The sterile insect technique (SIT), which involves area-wide inundative releases of sterile insects to suppress the reproduction of a target species, has proven to be an effective pest control method. The technique demands the continuous release of sterilized insects in quantitie...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2022-11-01
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| Series: | Parasites & Vectors |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13071-022-05512-3 |
| _version_ | 1797984663868801024 |
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| author | Danilo O. Carvalho Rachel Morreale Steven Stenhouse Daniel A. Hahn Maylen Gomez Aaron Lloyd David Hoel |
| author_facet | Danilo O. Carvalho Rachel Morreale Steven Stenhouse Daniel A. Hahn Maylen Gomez Aaron Lloyd David Hoel |
| author_sort | Danilo O. Carvalho |
| collection | DOAJ |
| description | Abstract Background The sterile insect technique (SIT), which involves area-wide inundative releases of sterile insects to suppress the reproduction of a target species, has proven to be an effective pest control method. The technique demands the continuous release of sterilized insects in quantities that ensure a high sterile male:wild male ratio for the suppression of the wild population over succeeding generations. Methods For these releases, it is important to determine several ecological and biological population parameters, including the longevity of the released males in the field, the dispersal of the released males and the wild pest population size. The Lee County Mosquito Control District initiated a study in a 47-ha portion of Captiva Island (Florida, USA), an island with a total area of 230 ha, to define biological SIT parameters for Aedes aegypti (L.), an invasive disease-vectoring mosquito known to be difficult to control due to a combination of daytime biting activity, use of cryptic breeding habitats that are difficult to target with conventional night-time ultra-low volume methods, and emerging resistance to commonly used insecticides. Another goal was to assess patterns of dispersal and survival for laboratory-reared sterile Ae. aegypti males released over time in the pilot site. These parameters will be used to evaluate the efficacy of a SIT suppression program for Ae. aegypti on Captiva Island. Results Over the course of seven mark-release-recapture studies using single- and multiple-point releases, 190,504 sterile marked males were released, for which the recapture rate was 1.5% over a mean period of 12 days. The mean distance traveled by sterile males of the local strain of Ae. aegypti that has colonized Captiva Island was 201.7 m from the release point, with an observed maximum traveled distance of 404.5 m. The released sterile mosquitoes had a probability of daily survival of 0.67 and an average life expectancy of ~ 2.46 days. Conclusions These data together with the population size estimate and sterile:wild ratio provide a solid basis for planning the SIT operational phase which is aimed at mosquito population suppression. Graphical abstract |
| first_indexed | 2024-04-11T07:06:40Z |
| format | Article |
| id | doaj.art-33cd7a2a6be04a5cbf4083453d96b371 |
| institution | Directory Open Access Journal |
| issn | 1756-3305 |
| language | English |
| last_indexed | 2024-04-11T07:06:40Z |
| publishDate | 2022-11-01 |
| publisher | BMC |
| record_format | Article |
| series | Parasites & Vectors |
| spelling | doaj.art-33cd7a2a6be04a5cbf4083453d96b3712022-12-22T04:38:23ZengBMCParasites & Vectors1756-33052022-11-0115111410.1186/s13071-022-05512-3A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recaptureDanilo O. Carvalho0Rachel Morreale1Steven Stenhouse2Daniel A. Hahn3Maylen Gomez4Aaron Lloyd5David Hoel6Insect Pest Control Subprogramme, Department of Nuclear Sciences and Applications, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy AgencyLee County Mosquito Control DistrictLee County Mosquito Control DistrictDepartment of Entomology and Nematology, University of FloridaInsect Pest Control Subprogramme, Department of Nuclear Sciences and Applications, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, International Atomic Energy AgencyLee County Mosquito Control DistrictLee County Mosquito Control DistrictAbstract Background The sterile insect technique (SIT), which involves area-wide inundative releases of sterile insects to suppress the reproduction of a target species, has proven to be an effective pest control method. The technique demands the continuous release of sterilized insects in quantities that ensure a high sterile male:wild male ratio for the suppression of the wild population over succeeding generations. Methods For these releases, it is important to determine several ecological and biological population parameters, including the longevity of the released males in the field, the dispersal of the released males and the wild pest population size. The Lee County Mosquito Control District initiated a study in a 47-ha portion of Captiva Island (Florida, USA), an island with a total area of 230 ha, to define biological SIT parameters for Aedes aegypti (L.), an invasive disease-vectoring mosquito known to be difficult to control due to a combination of daytime biting activity, use of cryptic breeding habitats that are difficult to target with conventional night-time ultra-low volume methods, and emerging resistance to commonly used insecticides. Another goal was to assess patterns of dispersal and survival for laboratory-reared sterile Ae. aegypti males released over time in the pilot site. These parameters will be used to evaluate the efficacy of a SIT suppression program for Ae. aegypti on Captiva Island. Results Over the course of seven mark-release-recapture studies using single- and multiple-point releases, 190,504 sterile marked males were released, for which the recapture rate was 1.5% over a mean period of 12 days. The mean distance traveled by sterile males of the local strain of Ae. aegypti that has colonized Captiva Island was 201.7 m from the release point, with an observed maximum traveled distance of 404.5 m. The released sterile mosquitoes had a probability of daily survival of 0.67 and an average life expectancy of ~ 2.46 days. Conclusions These data together with the population size estimate and sterile:wild ratio provide a solid basis for planning the SIT operational phase which is aimed at mosquito population suppression. Graphical abstracthttps://doi.org/10.1186/s13071-022-05512-3Sterile insect techniqueMark–release–recaptureAedes aegyptiMosquito population sizeMosquito dispersal |
| spellingShingle | Danilo O. Carvalho Rachel Morreale Steven Stenhouse Daniel A. Hahn Maylen Gomez Aaron Lloyd David Hoel A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture Parasites & Vectors Sterile insect technique Mark–release–recapture Aedes aegypti Mosquito population size Mosquito dispersal |
| title | A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture |
| title_full | A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture |
| title_fullStr | A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture |
| title_full_unstemmed | A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture |
| title_short | A sterile insect technique pilot trial on Captiva Island: defining mosquito population parameters for sterile male releases using mark–release–recapture |
| title_sort | sterile insect technique pilot trial on captiva island defining mosquito population parameters for sterile male releases using mark release recapture |
| topic | Sterile insect technique Mark–release–recapture Aedes aegypti Mosquito population size Mosquito dispersal |
| url | https://doi.org/10.1186/s13071-022-05512-3 |
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