William de Jesús May-Itzá

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In monogynous hymenopteran societies, the number of mates of a queen strongly influences the potential for conflict between workers and queens over the maternity of males. Queens always 'prefer' their own sons to sons of workers, regardless of queen mating frequency. When a queen mates once, workers are more closely related to, and therefore are expected to(More)
Euglossines have long been regarded as largely solitary, though some species are known to exhibit social behavior. We studied the nesting behavior of Euglossa viridissima over an annual cycle, comparing sociality and offspring production across the rainy (RS) and dry seasons (DS) in the Yucatan Peninsula of Mexico. Nests were built in both the RS and the(More)
Phenotypic and molecular differences were previously found in populations of the endangered stingless bee Melipona beecheii from two extremes of its geographic range. In this study we combine the use of morphometric and molecular tools, with the aim of investigating patterns of phenotypic and molecular variation in populations across Mesoamerica.(More)
The production of male sexual offspring by social insect colonies is often strongly seasonal or resource-dependent. In stingless bees, males are produced in smaller numbers under conditions of low colony food reserves; whether such males are negatively affected in traits related to reproductive success is not known. We compared body size, sperm production(More)
The stingless bee genus Scaptotrigona is widely distributed across tropical Mexico and includes economically important species used in stingless beekeeping. As Scaptotrigona colonies are currently or potentially translocated across regions, it is important to analyze the extent of genetic diversity from different populations. Herein, every analyzed(More)
Isometric worker size variation has been found in various species of stingless bees but the adaptive value of this phenomenon is little understood. We studied intra-colony worker size variation in Melipona in relation to individual foraging preference and colony growth in periods of resource abundance and scarcity. We found significant forager size(More)
Geometric morphometrics and molecular methods are effective tools to study the variability of stingless bee populations and species that merit protection given their worldwide decline. Based on previous evidence of cryptic lineages within the Scaptotrigona genus, we tested the existence of multiple evolutionary lineages within the species S. mexicana and we(More)
The relative contributions of heritable and environmentally acquired components of colony odor towards individual recognition are scarcely known in social insects. Larval food may affect cuticular profiles which in turn may serve as cues in the process of elimination of excess gynes characteristic of the eusocial stingless bees. In this study, we evaluated(More)
The stock of honey bees in the northern neotropics is likely a composite of European and African lineages, but the genetic makeup of most populations in this region has remained unstudied. We analyzed the genetic composition of honey bees across temperate and tropical regions of Mexico using mitochondrial and morphometric analyses. The results showed that(More)
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