Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis)
Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in...
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Knowledge Network for Biocomplexity
2014
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dataone:urn:uuid:32f11669-ea46-4421-9096-84846cf8268e 2024-06-03T18:46:23+00:00 Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) Gorman Kristen Biscoe Poiint Torgersen Island Dream Island ENVELOPE(-46.0,-3.0,-63.0,-63.0) BEGINDATE: 2007-01-01T00:00:00Z ENDDATE: 2009-01-01T00:00:00Z 2014-03-05T00:00:00Z https://search.dataone.org/view/urn:uuid:32f11669-ea46-4421-9096-84846cf8268e unknown Knowledge Network for Biocomplexity birds biology isotopes Pygoscelis adelie Pygoscelis chinstrap Pygoscelis gentoo adelie chinstrap gentoo Dataset 2014 dataone:urn:node:KNB 2024-06-03T18:16:50Z Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in the form of winter sea ice is associated with differences in male and female pre-breeding foraging niche. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. Molecular analyses were conducted at Simon Fraser University following standard PCR protocols, and stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer Dataset Antarc* Antarctic Antarctica Dream Island Sea ice Torgersen Island Knowledge Network for Biocomplexity (via DataONE) Antarctic Palmer Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Palmer-Station ENVELOPE(-64.050,-64.050,-64.770,-64.770) Torgersen ENVELOPE(-64.074,-64.074,-64.773,-64.773) Biscoe ENVELOPE(51.367,51.367,-66.217,-66.217) Torgersen Island ENVELOPE(-64.083,-64.083,-64.767,-64.767) Dream Island ENVELOPE(-64.225,-64.225,-64.727,-64.727) ENVELOPE(-46.0,-3.0,-63.0,-63.0) |
institution |
Open Polar |
collection |
Knowledge Network for Biocomplexity (via DataONE) |
op_collection_id |
dataone:urn:node:KNB |
language |
unknown |
topic |
birds biology isotopes Pygoscelis adelie Pygoscelis chinstrap Pygoscelis gentoo adelie chinstrap gentoo |
spellingShingle |
birds biology isotopes Pygoscelis adelie Pygoscelis chinstrap Pygoscelis gentoo adelie chinstrap gentoo Gorman Kristen Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
topic_facet |
birds biology isotopes Pygoscelis adelie Pygoscelis chinstrap Pygoscelis gentoo adelie chinstrap gentoo |
description |
Sexual segregation in vertebrate foraging niche is often associated with sexual size dimorphism (SSD), i.e., ecological sexual dimorphism. We examined ecological sexual dimorphism among sympatric nesting Pygoscelis penguins near Palmer Station, Antarctica, asking whether environmental variability in the form of winter sea ice is associated with differences in male and female pre-breeding foraging niche. Each season, study nests, where pairs of adults were present, were individually marked and chosen before the onset of egg-laying, and consistently monitored. When study nests were found at the one-egg stage, both adults were captured to obtain blood samples used for molecular sexing and stable isotope analyses, and measurements of structural size and body mass. At the time of capture, each adult penguin was quickly blood sampled (~1 ml) from the brachial vein. After handling, individuals at study nests were further monitored to ensure the pair reached clutch completion, i.e., two eggs. Molecular analyses were conducted at Simon Fraser University following standard PCR protocols, and stable isotope analyses were conducted at the Stable Isotope Facility at the University of California, Davis using an elemental analyzer interfaced with an isotope ratio mass spectrometer |
format |
Dataset |
author |
Gorman Kristen |
author_facet |
Gorman Kristen |
author_sort |
Gorman Kristen |
title |
Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
title_short |
Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
title_full |
Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
title_fullStr |
Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
title_full_unstemmed |
Ecological Sexual Dimorphism and Environmental Variability within a Community of Antarctic Penguins (Genus Pygoscelis) |
title_sort |
ecological sexual dimorphism and environmental variability within a community of antarctic penguins (genus pygoscelis) |
publisher |
Knowledge Network for Biocomplexity |
publishDate |
2014 |
url |
https://search.dataone.org/view/urn:uuid:32f11669-ea46-4421-9096-84846cf8268e |
op_coverage |
Biscoe Poiint Torgersen Island Dream Island ENVELOPE(-46.0,-3.0,-63.0,-63.0) BEGINDATE: 2007-01-01T00:00:00Z ENDDATE: 2009-01-01T00:00:00Z |
long_lat |
ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.050,-64.050,-64.770,-64.770) ENVELOPE(-64.074,-64.074,-64.773,-64.773) ENVELOPE(51.367,51.367,-66.217,-66.217) ENVELOPE(-64.083,-64.083,-64.767,-64.767) ENVELOPE(-64.225,-64.225,-64.727,-64.727) ENVELOPE(-46.0,-3.0,-63.0,-63.0) |
geographic |
Antarctic Palmer Station Palmer-Station Torgersen Biscoe Torgersen Island Dream Island |
geographic_facet |
Antarctic Palmer Station Palmer-Station Torgersen Biscoe Torgersen Island Dream Island |
genre |
Antarc* Antarctic Antarctica Dream Island Sea ice Torgersen Island |
genre_facet |
Antarc* Antarctic Antarctica Dream Island Sea ice Torgersen Island |
_version_ |
1800871685756289024 |