Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation
Sex allocation theory predicts parents should adjust their investment in male and female offspring in a way that increases parental fitness. This has been shown in several species and selective contexts. Yet, seasonal sex ratio variation within species and its underlying causes are poorly understood...
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ftdryad:oai:v1.datadryad.org:10255/dryad.121576 2023-05-15T16:12:01+02:00 Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation Helanterä, Heikki Kulmuni, Jonna Pamilo, Pekka Finland Fennoscandia Europe 2016-07-20T15:11:54Z http://hdl.handle.net/10255/dryad.121576 https://doi.org/10.5061/dryad.m9h08 unknown doi:10.5061/dryad.m9h08/1 doi:10.5061/dryad.m9h08/2 doi:10.1111/evo.13018 PMID:27485635 doi:10.5061/dryad.m9h08 Helanterä H, Kulmuni J, Pamilo P (2016) Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation. Evolution 70(10): 2387-2394. 1936-6426 http://hdl.handle.net/10255/dryad.121576 Kin conflict Social evolution Sex ratio conflict kin selection inclusive fitness Article 2016 ftdryad https://doi.org/10.5061/dryad.m9h08 https://doi.org/10.5061/dryad.m9h08/1 https://doi.org/10.5061/dryad.m9h08/2 https://doi.org/10.1111/evo.13018 2020-01-01T15:37:58Z Sex allocation theory predicts parents should adjust their investment in male and female offspring in a way that increases parental fitness. This has been shown in several species and selective contexts. Yet, seasonal sex ratio variation within species and its underlying causes are poorly understood. Here we study sex allocation variation in the wood ant Formica pratensis. This species displays conflict over colony sex ratio as workers and queens prefer different investment in male and female offspring, owing to haplodiploidy and relatedness asymmetries. It is unique among Formica ants because it produces two separate sexual offspring cohorts per season. We predict sex ratios to be closer to queen optimum in the early cohort but more female-biased and closer to worker optimum in the later one. This is because the power of workers to manipulate colony sex ratio varies seasonally with the availability of diploid eggs. Consistently more female-biased sex ratios in the later offspring cohort over a three-year sampling period from 93 colonies clearly support our prediction. The resulting seasonal alternation of sex ratios between queen and worker optima is a novel demonstration how understanding constraints of sex ratio adjustment increases our ability to predict sex ratio variation. Article in Journal/Newspaper Fennoscandia Dryad Digital Repository (Duke University) |
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Dryad Digital Repository (Duke University) |
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topic |
Kin conflict Social evolution Sex ratio conflict kin selection inclusive fitness |
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Kin conflict Social evolution Sex ratio conflict kin selection inclusive fitness Helanterä, Heikki Kulmuni, Jonna Pamilo, Pekka Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
topic_facet |
Kin conflict Social evolution Sex ratio conflict kin selection inclusive fitness |
description |
Sex allocation theory predicts parents should adjust their investment in male and female offspring in a way that increases parental fitness. This has been shown in several species and selective contexts. Yet, seasonal sex ratio variation within species and its underlying causes are poorly understood. Here we study sex allocation variation in the wood ant Formica pratensis. This species displays conflict over colony sex ratio as workers and queens prefer different investment in male and female offspring, owing to haplodiploidy and relatedness asymmetries. It is unique among Formica ants because it produces two separate sexual offspring cohorts per season. We predict sex ratios to be closer to queen optimum in the early cohort but more female-biased and closer to worker optimum in the later one. This is because the power of workers to manipulate colony sex ratio varies seasonally with the availability of diploid eggs. Consistently more female-biased sex ratios in the later offspring cohort over a three-year sampling period from 93 colonies clearly support our prediction. The resulting seasonal alternation of sex ratios between queen and worker optima is a novel demonstration how understanding constraints of sex ratio adjustment increases our ability to predict sex ratio variation. |
format |
Article in Journal/Newspaper |
author |
Helanterä, Heikki Kulmuni, Jonna Pamilo, Pekka |
author_facet |
Helanterä, Heikki Kulmuni, Jonna Pamilo, Pekka |
author_sort |
Helanterä, Heikki |
title |
Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
title_short |
Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
title_full |
Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
title_fullStr |
Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
title_full_unstemmed |
Data from: Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation |
title_sort |
data from: sex allocation conflict between queens and workers in formica pratensis wood ants predicts seasonal sex ratio variation |
publishDate |
2016 |
url |
http://hdl.handle.net/10255/dryad.121576 https://doi.org/10.5061/dryad.m9h08 |
op_coverage |
Finland Fennoscandia Europe |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
doi:10.5061/dryad.m9h08/1 doi:10.5061/dryad.m9h08/2 doi:10.1111/evo.13018 PMID:27485635 doi:10.5061/dryad.m9h08 Helanterä H, Kulmuni J, Pamilo P (2016) Sex allocation conflict between queens and workers in Formica pratensis wood ants predicts seasonal sex ratio variation. Evolution 70(10): 2387-2394. 1936-6426 http://hdl.handle.net/10255/dryad.121576 |
op_doi |
https://doi.org/10.5061/dryad.m9h08 https://doi.org/10.5061/dryad.m9h08/1 https://doi.org/10.5061/dryad.m9h08/2 https://doi.org/10.1111/evo.13018 |
_version_ |
1765997242646265856 |