Data from: Brood size matching: a novel perspective on predator dilution
A primary benefit of grouping is diluting the individual risk of attack by predators. However, the fact that groups are formed not always by solitary adults but also by subgroups (e.g., families) has been overlooked. The subgroup-specific benefit of predator dilution depends on its relative contribu...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | http://hdl.handle.net/10255/dryad.42803 https://doi.org/10.5061/dryad.mn11k |
id |
ftdryad:oai:v1.datadryad.org:10255/dryad.42803 |
---|---|
record_format |
openpolar |
spelling |
ftdryad:oai:v1.datadryad.org:10255/dryad.42803 2023-05-15T18:20:26+02:00 Data from: Brood size matching: a novel perspective on predator dilution Jaatinen, Kim Öst, Markus Baltic Sea 2012-09-27T17:58:11Z http://hdl.handle.net/10255/dryad.42803 https://doi.org/10.5061/dryad.mn11k unknown doi:10.5061/dryad.mn11k/1 doi:10.1086/668824 PMID:23348772 doi:10.5061/dryad.mn11k Jaatinen K, Öst M (2012) Brood size matching: a novel perspective on predator dilution. The American Naturalist 181(2): 171-181. http://hdl.handle.net/10255/dryad.42803 Behavior: antipredator Behavior: reproductive Behavior: social Ecology: behavioral Game theory Interactions: predation Article 2012 ftdryad https://doi.org/10.5061/dryad.mn11k https://doi.org/10.5061/dryad.mn11k/1 https://doi.org/10.1086/668824 2020-01-01T14:58:08Z A primary benefit of grouping is diluting the individual risk of attack by predators. However, the fact that groups are formed not always by solitary adults but also by subgroups (e.g., families) has been overlooked. The subgroup-specific benefit of predator dilution depends on its relative contribution to total group size. Therefore, the willingness of a subgroup to merge with others should increase the less it contributes to total group size, but the conflicting preferences of partners may result in the preferential merger of similar-sized subgroups. Here, we evaluate how the proportional contribution of subgroups to diluting risk affects group formation. We generate predictions using a bidding game over parental care and test them using data on common eiders (Somateria mollissima), in which females with variable-sized broods may form brood-rearing coalitions. The predictions (1) that size-matched subgroups should have a higher propensity to merge, (2) that predation should increase group formation propensity, and (3) that increased bargaining power, as proxied by female body condition, should increase the time needed to establish partnerships were all supported. Partners do negotiate over their relative contributions to predator dilution, accepting or rejecting partnerships on the basis of this criterion. Our results show that consideration of the size of subgroups before merger is critical in understanding the process of group formation under the threat of predation. Article in Journal/Newspaper Somateria mollissima Dryad Digital Repository (Duke University) |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Behavior: antipredator Behavior: reproductive Behavior: social Ecology: behavioral Game theory Interactions: predation |
spellingShingle |
Behavior: antipredator Behavior: reproductive Behavior: social Ecology: behavioral Game theory Interactions: predation Jaatinen, Kim Öst, Markus Data from: Brood size matching: a novel perspective on predator dilution |
topic_facet |
Behavior: antipredator Behavior: reproductive Behavior: social Ecology: behavioral Game theory Interactions: predation |
description |
A primary benefit of grouping is diluting the individual risk of attack by predators. However, the fact that groups are formed not always by solitary adults but also by subgroups (e.g., families) has been overlooked. The subgroup-specific benefit of predator dilution depends on its relative contribution to total group size. Therefore, the willingness of a subgroup to merge with others should increase the less it contributes to total group size, but the conflicting preferences of partners may result in the preferential merger of similar-sized subgroups. Here, we evaluate how the proportional contribution of subgroups to diluting risk affects group formation. We generate predictions using a bidding game over parental care and test them using data on common eiders (Somateria mollissima), in which females with variable-sized broods may form brood-rearing coalitions. The predictions (1) that size-matched subgroups should have a higher propensity to merge, (2) that predation should increase group formation propensity, and (3) that increased bargaining power, as proxied by female body condition, should increase the time needed to establish partnerships were all supported. Partners do negotiate over their relative contributions to predator dilution, accepting or rejecting partnerships on the basis of this criterion. Our results show that consideration of the size of subgroups before merger is critical in understanding the process of group formation under the threat of predation. |
format |
Article in Journal/Newspaper |
author |
Jaatinen, Kim Öst, Markus |
author_facet |
Jaatinen, Kim Öst, Markus |
author_sort |
Jaatinen, Kim |
title |
Data from: Brood size matching: a novel perspective on predator dilution |
title_short |
Data from: Brood size matching: a novel perspective on predator dilution |
title_full |
Data from: Brood size matching: a novel perspective on predator dilution |
title_fullStr |
Data from: Brood size matching: a novel perspective on predator dilution |
title_full_unstemmed |
Data from: Brood size matching: a novel perspective on predator dilution |
title_sort |
data from: brood size matching: a novel perspective on predator dilution |
publishDate |
2012 |
url |
http://hdl.handle.net/10255/dryad.42803 https://doi.org/10.5061/dryad.mn11k |
op_coverage |
Baltic Sea |
genre |
Somateria mollissima |
genre_facet |
Somateria mollissima |
op_relation |
doi:10.5061/dryad.mn11k/1 doi:10.1086/668824 PMID:23348772 doi:10.5061/dryad.mn11k Jaatinen K, Öst M (2012) Brood size matching: a novel perspective on predator dilution. The American Naturalist 181(2): 171-181. http://hdl.handle.net/10255/dryad.42803 |
op_doi |
https://doi.org/10.5061/dryad.mn11k https://doi.org/10.5061/dryad.mn11k/1 https://doi.org/10.1086/668824 |
_version_ |
1766197968124248064 |