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Published on: April 22, 2015
Sexual behavior of mutant strains of the medfly Ceratitis capitata (Diptera: Tephritidae)
1Escuela de Biologia, Universidad de Costa Rica, Ciudad Universitaria, Costa Rica. rbriceno@biologia.ucr.ac.cr
Abstract:
Males of the mutant strains (blind, vestigal-winged) of the Mediterranean fruit fly (medfly), Ceratits capitata (Wiedmann) showed differences in behavior compared with control (mass-reared) males. Mutant males made fewer mating attempts and achieved fewer matings than control males. Vestigal-winged females copulated less frequently with both mutants. Blind males climbed rather than jumped onto females and copulated in very low numbers compared with control and vestigal males. Blind females copulated normally with control, males and in very low numbers with both types of mutant males.
Insights
Mutant Mediterranean fruit flies (medfly) with blind or vestigial wings exhibited altered mating behaviors compared to control males. These genetic modifications significantly reduced mating success in both male and female medflies.
Area of Science:
- Entomology
- Behavioral Ecology
- Genetics
Background:
- The Mediterranean fruit fly (medfly), *Ceratitis capitata*, is a significant agricultural pest.
- Understanding the behavioral impacts of genetic mutations is crucial for developing effective pest control strategies.
Purpose of the Study:
- To investigate the mating behavior differences between mutant (blind, vestigial-winged) and control (mass-reared) male medflies.
- To assess the impact of these male mutations on mating success and female receptivity.
Main Methods:
- Comparative behavioral analysis of mutant and control male medflies during mating attempts.
- Observation and quantification of copulation frequency and success rates.
Main Results:
- Mutant males (blind, vestigial-winged) initiated fewer mating attempts and achieved significantly lower mating success than control males.
- Vestigial-winged females showed reduced copulation frequency with both mutant male types.
- Blind males displayed altered courtship (climbing vs. jumping) and very low copulation numbers; blind females also showed reduced copulation with mutant males.
Conclusions:
- Genetic mutations affecting vision and wing development in medflies profoundly impact male mating behavior and overall reproductive success.
- These behavioral deficits in mutant medflies could have implications for sterile insect technique efficacy.
