Abstract
Mating trophallaxis represents a fascinating strategy adopted by males of several animal species to affect the decision-making of females during mating. Among tephritids, few species perform mating trophallaxis. However, this phenomenon has been little studied in major tephritid pests. We reported the presence of indirect mating trophallaxis in Mediterranean fruit flies, Ceratitis capitata, showing its influence on the main mating traits, male mating success and female egg load. Of 219 mating pairs, only 27 of them showed mating trophallaxis, indicating that mating trophallaxis may represent a significant male energy investment. The duration of male wing vibration and the whole precopula phase was longer in pairs that mated without trophallaxis compared to the pairs displaying mating trophallaxis. Males that displayed trophallaxis performed a longer whole duration of the courtship and mating sequence, with no differences in copula duration. Male mating success was slightly increased by trophallaxis. The majority of males performing trophallaxis skipped wing vibration during courtship, while all males courting females without trophallaxis relied on wing vibration to attract females within short distances. No egg load differences were reported for females that consumed nuptial gifts over control females. Overall, our research sheds light on the relation between indirect mating trophallaxis and egg load production in medflies, providing a better understanding of sexual selective mechanisms as the basis of courtship and mating behaviour in tephritid flies. Furthermore, this behaviour could be used as a quality control parameter to assess medfly mass-reared strains, in order to improve sterile insect technique programmes.
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Acknowledgements
Two anonymous reviewers kindly improved an earlier version of this manuscript. The authors would like to thank Prof. A. Canale for helpful discussions on the topic, as well as Dr. A. Loni for technical assistance in medfly rearing.
Funding
G. Benelli is sponsored by PROAPI (PRAF 2015) and University of Pisa, Department of Agriculture, Food and Environment (Grant ID: COFIN2015_22). This work was supported by the H2020 Project “Submarine cultures perform long-term robotic exploration of unconventional environmental niches” (subCULTron) [640967FP7]. Funders had no role in the study design, data collection and analysis, decision to publish or preparation of the manuscript.
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Benelli, G., Romano, D. Does indirect mating trophallaxis boost male mating success and female egg load in Mediterranean fruit flies?. J Pest Sci 91, 181–188 (2018). https://doi.org/10.1007/s10340-017-0854-z
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DOI: https://doi.org/10.1007/s10340-017-0854-z