Vollet_ImperatrizFonseca_RATNIEKS_2019_ScaptotrigonaDepilis_AmNat.pdf (709.69 kB)
Queen execution, diploid males, and selection for and against polyandry in the Brazilian stingless bee Scaptotrigona depilis
journal contribution
posted on 2023-06-09, 20:21 authored by Ayrton Vollet-Neto, Vera L Imperatriz-Fonseca, Francis RatnieksFemale mating frequency varies. Determining the causes of this variation is an active research area. We tested the hypothesis that in stingless bees, Meliponini, singlemating is due to the execution of queens that make a matched mating at the complementary sex determination locus and have diploid male offspring. We studied the Brazilian species Scaptotrigona depilis. We made up 70 test colonies so that 50% (single matched mating), 25% (double mating), 12.5% (quadruple mating), or 0% (single nonmatched mating) of the emerging brood were diploidmales.Queen execution following diploidmale emergence was equal and high in colonies producing 50% (77% executed) and 25% (75%) diploid males versus equal and low in colonies producing 12.5% (7%) and 0% (0%) diploid males. These results show that queens that mate with two males with similar paternity suffer an increased chance of being executed, which selects against double mating. However, double mating with unequal paternity (e.g., 25:75), which occasionally occurs in S. depilis, is selectively neutral. Single mating and double mating with unequal paternity form one adaptive peak. The results show a second adaptive peak at quadruple mating. However, this is inaccessible via gradual evolutionary change in a selective landscape with reduced fitness at double mating.
History
Publication status
- Published
File Version
- Published version
Journal
American NaturalistISSN
0003-0147Publisher
University of ChicagoExternal DOI
Issue
5Volume
194Page range
725-735Department affiliated with
- Evolution, Behaviour and Environment Publications
Research groups affiliated with
- Laboratory of Apiculture and Social Insects Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-01-23First Open Access (FOA) Date
2020-09-19First Compliant Deposit (FCD) Date
2020-01-23Usage metrics
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