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Larval food provisions affect developmental time, body size and vitellogenin titers of Scaptotrigona pectoralis gynes (Hymenoptera: Meliponini)

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Abstract

Body size has frequently been discussed as related to reproductive success. Stingless bees show remarkable variation in body size among and within sexes and castes, but very little is known about the proximate causes and the consequences of such variation in these highly eusocial bees. In this study, we evaluated the effect of different amounts of food provided to the larvae on developmental time, body size, abdominal mass, and vitellogenin (Vg) hemolymph titers of gynes of the stingless bee Scaptotrigona pectoralis, a species with trophic caste determination. Our results provide empirical evidence of a significant effect of the quantity of larval food on the duration of development, body size, and traits of reproductive fitness. We discuss proximate causes that may explain gyne size variation in stingless bees. We see this as an initial step towards understanding the adaptive significance and ultimate causes of this phenomenon in highly eusocial bees.

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Acknowledgments

We thank two anonymous reviewers and Professor Miriam Richards for their valuable comments to improve our manuscript. The article is part of AM thesis for which she received a CONACyT grant. CONACyT project 291333 “Manejo sustentable de polinizadores” supported this investigation. Many thanks to Biol. Teresita Solis for help in lab work and data collection.

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Correspondence to J. J. G. Quezada-Euán.

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Morales, A., Hartfelder, K., Medina-Peralta, S. et al. Larval food provisions affect developmental time, body size and vitellogenin titers of Scaptotrigona pectoralis gynes (Hymenoptera: Meliponini). Insect. Soc. 68, 93–100 (2021). https://doi.org/10.1007/s00040-020-00801-5

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  • DOI: https://doi.org/10.1007/s00040-020-00801-5

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