The price of insurance: costs and benefits of worker production in a facultatively social bee

Shell, Wyatt A.; Rehan, Sandra M.

doi:10.1093/beheco/arx146

Cited by 26 publications

(15 citation statements)

References 70 publications

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“…17,23,[26][27][28] ). To date, published genomic and transcriptomic resources for the Xylocopinae have been limited but highly informative resources for comparative studies of early social evolution [29][30][31][32][33][34][35] . Here we present four newly sequenced xylocopine genomes and transcriptomes and combine these with published genomic and transcriptomic data from 12 additional bee species to address three main questions.…”

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confidence: 99%

Sociality sculpts similar patterns of molecular evolution in two independently evolved lineages of eusocial bees

et al. 2021

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While it is well known that the genome can affect social behavior, recent models posit that social lifestyles can, in turn, influence genome evolution. Here, we perform the most phylogenetically comprehensive comparative analysis of 16 bee genomes to date: incorporating two published and four new carpenter bee genomes (Apidae: Xylocopinae) for a first-ever genomic comparison with a monophyletic clade containing solitary through advanced eusocial taxa. We find that eusocial lineages have undergone more gene family expansions, feature more signatures of positive selection, and have higher counts of taxonomically restricted genes than solitary and weakly social lineages. Transcriptomic data reveal that caste-affiliated genes are deeply-conserved; gene regulatory and functional elements are more closely tied to social phenotype than phylogenetic lineage; and regulatory complexity increases steadily with social complexity. Overall, our study provides robust empirical evidence that social evolution can act as a major and surprisingly consistent driver of macroevolutionary genomic change.

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confidence: 99%

Sociality sculpts similar patterns of molecular evolution in two independently evolved lineages of eusocial bees

et al. 2021

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“…Bee species with single-mated females usually mate before the provisioning season (26) and have short-lived males (24,41). For example, there is very low male survival for the duration of the nesting season in C. calcarata (42), where 81% of females are singly mated (27). Long-term persistence of mating opportunities selects for prolonged life of males (43,44), and only a long-living male has the opportunity to participate in offspring care.…”

Section: Discussionmentioning

confidence: 99%

“…As biparental care should increase the fitness of both sexes (2, 6), we tested the benefits of this strategy for males and females separately. We identified the maternity and paternity of brood individuals using microsatellites, and we compared the mating frequency of C. nigrolabiata with that of solitary and facultatively eusocial bee species in which single mating is known (14,(25)(26)(27). Importantly, the presence of solitary, biparental, and eusocial nesting within the same bee genus allows for comparisons of the existing cooperative strategies.…”

Section: Significancementioning

confidence: 99%

Polyandrous bee provides extended offspring care biparentally as an alternative to monandry based eusociality

Mikát

Janošík

Černá

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

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Parental care behavior evolves to increase the survival of offspring. When offspring care becomes complicated for ecological reasons, cooperation of multiple individuals can be beneficial. There are two types of cooperative care: biparental care and worker (helper)-based care (e.g., eusociality). Although biparental care is common in several groups of vertebrates, it is generally rare in arthropods. Conversely, eusociality is widespread in insects, especially the aculeate Hymenoptera. Here, we present a case of biparental care in bees, inCeratina nigrolabiata(Apidae, Xylocopinae). Similar to eusocial behavior, biparental care leads to greater brood protection in this species. Male guarding increases provisioning of nests because females are liberated from the tradeoff between provisioning and nest protection. The main benefit of parental care for males should be increased paternity. Interestingly though, we found that paternity of offspring by guard males is extraordinarily low (10% of offspring). Generally, we found that nests were not guarded by the same male for the whole provisioning season, meaning that males arrive to nests as stepfathers. However, we show that long-term guarding performed by a single male does increase paternity. We suggest that the multiple-mating strategy of these bees increased the amount of time for interactions between the sexes, and this longer period of potential interaction supported the origin of biparental care. Eusociality based on monandry was thought to be the main type of extended brood protection in bees. We show that biparental care based on polyandry provides an interesting evolutionary alternative.

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“…Therefore, those that remain with their mother have apparently chosen to voluntarily become non-reproductive workers. Careful measures of nest reproductive success across multiple species, however, found fitness gains for helping relatives to be significantly less than expected gains from dispersing and reproducing one's own offspring [17–21]. Somehow very cooperative, yet also apparently very maladaptive behaviour continues to persist in these populations.…”

mentioning

confidence: 99%

Hamilton's rule is essential but insufficient for understanding monogamy's role in social evolution

Nonacs

2019

R. Soc. open sci.

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The price of insurance: costs and benefits of worker production in a facultatively social bee

Cited by 26 publications

References 70 publications

Sociality sculpts similar patterns of molecular evolution in two independently evolved lineages of eusocial bees

Sociality sculpts similar patterns of molecular evolution in two independently evolved lineages of eusocial bees

Polyandrous bee provides extended offspring care biparentally as an alternative to monandry based eusociality

Hamilton's rule is essential but insufficient for understanding monogamy's role in social evolution

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