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• W2111279891 startingPage "755" @default.
• W2111279891 abstract "Theory predicts that altruism is only evolutionarily stable if it is preferentially directed towards relatives, so that any such behaviour towards seemingly unrelated individuals requires scrutiny. Queenless army ant colonies, which have anecdotally been reported to fuse with queenright foreign colonies, are such an enigmatic case. Here we combine experimental queen removal with population genetics and cuticular chemistry analyses to show that colonies of the African army ant Dorylus molestus frequently merge with neighbouring colonies after queen loss. Merging colonies often have no direct co-ancestry, but are on average probably distantly related because of overall population viscosity. The alternative of male production by orphaned workers appears to be so inefficient that residual inclusive fitness of orphaned workers might be maximized by indiscriminately merging with neighbouring colonies to increase their reproductive success. We show that worker chemical recognition profiles remain similar after queen loss, but rapidly change into a mixed colony Gestalt odour after fusion, consistent with indiscriminate acceptance of alien workers that are no longer aggressive. We hypothesize that colony fusion after queen loss might be more widespread, especially in spatially structured populations of social insects where worker reproduction is not profitable." @default.
• W2111279891 created "2016-06-24" @default.
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• W2111279891 date "2009-11-04" @default.
• W2111279891 modified "2023-09-25" @default.
• W2111279891 title "Colony fusion and worker reproduction after queen loss in army ants" @default.
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• W2111279891 doi "https://doi.org/10.1098/rspb.2009.1591" @default.
• W2111279891 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2842746" @default.
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• W2111279891 hasPublicationYear "2009" @default.
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