Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning
Sexual size dimorphism (SSD) implies correlated differences in energetic requirements and feeding opportunities, such that sexes will face different trade-offs in habitat selection. In seasonal migrants, this could result in a differential spatial distribution across the wintering range. To identify...
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ftdryad:oai:v1.datadryad.org:10255/dryad.69221 2023-05-15T15:13:22+02:00 Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning Duijns, Sjoerd van Gils, Jan A. Spaans, Bernard ten Horn, Job Brugge, Maarten Piersma, Theunis Wadden Sea Dublin Bay Sylt Ile de Re Grevelingendam the Wash 2014-10-07T17:48:35Z http://hdl.handle.net/10255/dryad.69221 https://doi.org/10.5061/dryad.71ds5 unknown doi:10.5061/dryad.71ds5/1 doi:10.5061/dryad.71ds5/2 doi:10.5061/dryad.71ds5/3 doi:10.1002/ece3.1213 PMID:25505527 doi:10.5061/dryad.71ds5 Duijns S, van Gils JA, Spaans B, ten Horn J, Brugge M, Piersma T (2014) Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning. Ecology and Evolution 4(20): 4009-4018. http://hdl.handle.net/10255/dryad.69221 Bar-tailed godwit Bergmann’s rule resource partitioning Article 2014 ftdryad https://doi.org/10.5061/dryad.71ds5 https://doi.org/10.5061/dryad.71ds5/1 https://doi.org/10.5061/dryad.71ds5/2 https://doi.org/10.5061/dryad.71ds5/3 https://doi.org/10.1002/ece3.1213 2020-01-01T15:10:59Z Sexual size dimorphism (SSD) implies correlated differences in energetic requirements and feeding opportunities, such that sexes will face different trade-offs in habitat selection. In seasonal migrants, this could result in a differential spatial distribution across the wintering range. To identify the ecological causes of sexual spatial segregation, we studied a sexually dimorphic shorebird, the bar-tailed godwit Limosa lapponica, in which females have a larger body and a longer bill than males. With respect to the trade-offs that these migratory shorebirds experience in their choice of wintering area, northern and colder wintering sites have the benefit of being closer to the Arctic breeding grounds. According to Bergmann's rule, the larger females should incur lower energetic costs per unit of body mass over males, helping them to winter in the cold. However, as the sexes have rather different bill lengths, differences in sex-specific wintering sites could also be due to the vertical distribution of their buried prey, that is, resource partitioning. Here, in a comparison between six main intertidal wintering areas across the entire winter range of the lapponica subspecies in northwest Europe, we show that the percentage of females between sites was not correlated with the cost of wintering, but was positively correlated with the biomass in the bottom layer and negatively with the biomass in the top layer. We conclude that resource partitioning, rather than relative expenditure advantages, best explains the differential spatial distribution of male and female bar-tailed godwits across northwest Europe. Article in Journal/Newspaper Arctic Dryad Digital Repository (Duke University) Arctic |
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Open Polar |
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Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Bar-tailed godwit Bergmann’s rule resource partitioning |
spellingShingle |
Bar-tailed godwit Bergmann’s rule resource partitioning Duijns, Sjoerd van Gils, Jan A. Spaans, Bernard ten Horn, Job Brugge, Maarten Piersma, Theunis Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
topic_facet |
Bar-tailed godwit Bergmann’s rule resource partitioning |
description |
Sexual size dimorphism (SSD) implies correlated differences in energetic requirements and feeding opportunities, such that sexes will face different trade-offs in habitat selection. In seasonal migrants, this could result in a differential spatial distribution across the wintering range. To identify the ecological causes of sexual spatial segregation, we studied a sexually dimorphic shorebird, the bar-tailed godwit Limosa lapponica, in which females have a larger body and a longer bill than males. With respect to the trade-offs that these migratory shorebirds experience in their choice of wintering area, northern and colder wintering sites have the benefit of being closer to the Arctic breeding grounds. According to Bergmann's rule, the larger females should incur lower energetic costs per unit of body mass over males, helping them to winter in the cold. However, as the sexes have rather different bill lengths, differences in sex-specific wintering sites could also be due to the vertical distribution of their buried prey, that is, resource partitioning. Here, in a comparison between six main intertidal wintering areas across the entire winter range of the lapponica subspecies in northwest Europe, we show that the percentage of females between sites was not correlated with the cost of wintering, but was positively correlated with the biomass in the bottom layer and negatively with the biomass in the top layer. We conclude that resource partitioning, rather than relative expenditure advantages, best explains the differential spatial distribution of male and female bar-tailed godwits across northwest Europe. |
format |
Article in Journal/Newspaper |
author |
Duijns, Sjoerd van Gils, Jan A. Spaans, Bernard ten Horn, Job Brugge, Maarten Piersma, Theunis |
author_facet |
Duijns, Sjoerd van Gils, Jan A. Spaans, Bernard ten Horn, Job Brugge, Maarten Piersma, Theunis |
author_sort |
Duijns, Sjoerd |
title |
Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
title_short |
Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
title_full |
Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
title_fullStr |
Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
title_full_unstemmed |
Data from: Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
title_sort |
data from: sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning |
publishDate |
2014 |
url |
http://hdl.handle.net/10255/dryad.69221 https://doi.org/10.5061/dryad.71ds5 |
op_coverage |
Wadden Sea Dublin Bay Sylt Ile de Re Grevelingendam the Wash |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
doi:10.5061/dryad.71ds5/1 doi:10.5061/dryad.71ds5/2 doi:10.5061/dryad.71ds5/3 doi:10.1002/ece3.1213 PMID:25505527 doi:10.5061/dryad.71ds5 Duijns S, van Gils JA, Spaans B, ten Horn J, Brugge M, Piersma T (2014) Sex-specific winter distribution in a sexually dimorphic shorebird is explained by resource partitioning. Ecology and Evolution 4(20): 4009-4018. http://hdl.handle.net/10255/dryad.69221 |
op_doi |
https://doi.org/10.5061/dryad.71ds5 https://doi.org/10.5061/dryad.71ds5/1 https://doi.org/10.5061/dryad.71ds5/2 https://doi.org/10.5061/dryad.71ds5/3 https://doi.org/10.1002/ece3.1213 |
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