Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee
Animals respond to competition among kin for critical breeding resources in two ways: avoidance of direct fitness costs via dispersal of siblings to breed separately, and formation of kin-based societies in which subordinates offset direct fitness costs of breeding competition via altruism and incre...
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Frontiers Media S.A.
2021
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oai:doaj.org-article:a05e8499d3dd4265b2fa77750e1dc3b72021-11-30T18:46:23ZCompetition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee2296-701X10.3389/fevo.2021.738809https://doaj.org/article/a05e8499d3dd4265b2fa77750e1dc3b72021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fevo.2021.738809/fullhttps://doaj.org/toc/2296-701XAnimals respond to competition among kin for critical breeding resources in two ways: avoidance of direct fitness costs via dispersal of siblings to breed separately, and formation of kin-based societies in which subordinates offset direct fitness costs of breeding competition via altruism and increased indirect fitness. In the facultatively social eastern carpenter bee, nests are a critical breeding resource in perpetually short supply, leading to strong competition among females. Observations of individually marked and genotyped females in conditions of high and low resource competition demonstrate that competition leads to resource sharing and group nesting. However, in contrast to almost all known animal societies, females avoid nesting with relatives, and disperse from their natal nests to join social groups of non-relatives. This is the first example of a structured insect society with cooperation nestmates, the majority of which are unrelated; thus cooperation is more likely based on selection for direct, rather than indirect fitness. By forming social groups of non-kin, females avoid the indirect fitness costs of kin competition among sisters, yet increase their chances of successful reproduction, and thus direct fitness, when forming colonies of non-relatives.Jess L. VickruckMiriam H. RichardsFrontiers Media S.A.articlesocial evolutionXylocopa virginicanesting resourcesbehavioral plasticitybeeEvolutionQH359-425EcologyQH540-549.5ENFrontiers in Ecology and Evolution, Vol 9 (2021) |
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social evolution Xylocopa virginica nesting resources behavioral plasticity bee Evolution QH359-425 Ecology QH540-549.5 |
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social evolution Xylocopa virginica nesting resources behavioral plasticity bee Evolution QH359-425 Ecology QH540-549.5 Jess L. Vickruck Miriam H. Richards Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
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Animals respond to competition among kin for critical breeding resources in two ways: avoidance of direct fitness costs via dispersal of siblings to breed separately, and formation of kin-based societies in which subordinates offset direct fitness costs of breeding competition via altruism and increased indirect fitness. In the facultatively social eastern carpenter bee, nests are a critical breeding resource in perpetually short supply, leading to strong competition among females. Observations of individually marked and genotyped females in conditions of high and low resource competition demonstrate that competition leads to resource sharing and group nesting. However, in contrast to almost all known animal societies, females avoid nesting with relatives, and disperse from their natal nests to join social groups of non-relatives. This is the first example of a structured insect society with cooperation nestmates, the majority of which are unrelated; thus cooperation is more likely based on selection for direct, rather than indirect fitness. By forming social groups of non-kin, females avoid the indirect fitness costs of kin competition among sisters, yet increase their chances of successful reproduction, and thus direct fitness, when forming colonies of non-relatives. |
format |
article |
author |
Jess L. Vickruck Miriam H. Richards |
author_facet |
Jess L. Vickruck Miriam H. Richards |
author_sort |
Jess L. Vickruck |
title |
Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
title_short |
Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
title_full |
Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
title_fullStr |
Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
title_full_unstemmed |
Competition Drives Group Formation and Reduces Within Nest Relatedness in a Facultatively Social Carpenter Bee |
title_sort |
competition drives group formation and reduces within nest relatedness in a facultatively social carpenter bee |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doaj.org/article/a05e8499d3dd4265b2fa77750e1dc3b7 |
work_keys_str_mv |
AT jesslvickruck competitiondrivesgroupformationandreduceswithinnestrelatednessinafacultativelysocialcarpenterbee AT miriamhrichards competitiondrivesgroupformationandreduceswithinnestrelatednessinafacultativelysocialcarpenterbee |
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1718406342599770112 |