Sibling competition, dispersal and fitness outcomes in humans
Abstract Determining how sibling interactions alter the fitness outcomes of dispersal is pivotal for the understanding of family living, but such studies are currently scarce. Using a large demographic dataset on pre-industrial humans from Finland, we studied dispersal consequences on different indi...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-33700-3 |
| _version_ | 1797827605620064256 |
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| author | Aïda Nitsch Charlotte Faurie Virpi Lummaa |
| author_facet | Aïda Nitsch Charlotte Faurie Virpi Lummaa |
| author_sort | Aïda Nitsch |
| collection | DOAJ |
| description | Abstract Determining how sibling interactions alter the fitness outcomes of dispersal is pivotal for the understanding of family living, but such studies are currently scarce. Using a large demographic dataset on pre-industrial humans from Finland, we studied dispersal consequences on different indicators of lifetime reproductive success according to sex-specific birth rank (a strong determinant of dispersal in our population). Contrary to the predictions of the leading hypotheses, we found no support for differential fitness benefits of dispersal for either males or females undergoing low vs. high sibling competition. Our results are inconsistent with both hypotheses that family members could have different fitness maximizing strategies depending on birth rank, and that dispersal could be mainly driven by indirect fitness benefits for philopatric family members. Our study stresses the need for studying the relative outcomes of dispersal at the family level in order to understand the evolution of family living and dispersal behaviour. |
| first_indexed | 2024-04-09T12:51:00Z |
| format | Article |
| id | doaj.art-d3acb5b1591c416f99efaa7c048bbbc7 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T12:51:00Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d3acb5b1591c416f99efaa7c048bbbc72023-05-14T11:14:43ZengNature PortfolioScientific Reports2045-23222023-05-0113111310.1038/s41598-023-33700-3Sibling competition, dispersal and fitness outcomes in humansAïda Nitsch0Charlotte Faurie1Virpi Lummaa2Institute for Advanced Study in ToulouseUniversity of MontpellierDepartment of Biology, University of TurkuAbstract Determining how sibling interactions alter the fitness outcomes of dispersal is pivotal for the understanding of family living, but such studies are currently scarce. Using a large demographic dataset on pre-industrial humans from Finland, we studied dispersal consequences on different indicators of lifetime reproductive success according to sex-specific birth rank (a strong determinant of dispersal in our population). Contrary to the predictions of the leading hypotheses, we found no support for differential fitness benefits of dispersal for either males or females undergoing low vs. high sibling competition. Our results are inconsistent with both hypotheses that family members could have different fitness maximizing strategies depending on birth rank, and that dispersal could be mainly driven by indirect fitness benefits for philopatric family members. Our study stresses the need for studying the relative outcomes of dispersal at the family level in order to understand the evolution of family living and dispersal behaviour.https://doi.org/10.1038/s41598-023-33700-3 |
| spellingShingle | Aïda Nitsch Charlotte Faurie Virpi Lummaa Sibling competition, dispersal and fitness outcomes in humans Scientific Reports |
| title | Sibling competition, dispersal and fitness outcomes in humans |
| title_full | Sibling competition, dispersal and fitness outcomes in humans |
| title_fullStr | Sibling competition, dispersal and fitness outcomes in humans |
| title_full_unstemmed | Sibling competition, dispersal and fitness outcomes in humans |
| title_short | Sibling competition, dispersal and fitness outcomes in humans |
| title_sort | sibling competition dispersal and fitness outcomes in humans |
| url | https://doi.org/10.1038/s41598-023-33700-3 |
| work_keys_str_mv | AT aidanitsch siblingcompetitiondispersalandfitnessoutcomesinhumans AT charlottefaurie siblingcompetitiondispersalandfitnessoutcomesinhumans AT virpilummaa siblingcompetitiondispersalandfitnessoutcomesinhumans |