Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica
Abstract Chinstrap penguins ( Pygoscelis antarcticus ) show little sexual dimorphism and sexing by direct observation can be difficult. Through molecular techniques, male and female adults were identified at Stinker Point, Elephant Island, South Shetland Islands, in the 2011–12 and 2012–13 breeding...
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Online Access: | http://dx.doi.org/10.1017/s0954102014000820 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102014000820 |
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crcambridgeupr:10.1017/s0954102014000820 2024-03-03T08:37:57+00:00 Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica Brummelhaus, Jaqueline Valiati, Victor Hugo Petry, Maria Virginia 2015 http://dx.doi.org/10.1017/s0954102014000820 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102014000820 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 27, issue 4, page 327-332 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0954102014000820 2024-02-08T08:47:21Z Abstract Chinstrap penguins ( Pygoscelis antarcticus ) show little sexual dimorphism and sexing by direct observation can be difficult. Through molecular techniques, male and female adults were identified at Stinker Point, Elephant Island, South Shetland Islands, in the 2011–12 and 2012–13 breeding seasons. In the assessment of sexual dimorphism using morphological characteristics, males were 6.0–9.4% larger than females. From the most significant morphological measurements, a discriminant function was formulated that classified 80.6% of the birds correctly. In addition, our data on bill length and depth were compared with those in the literature to evaluate sexual dimorphism between different breeding locations and to test the performance of the discriminant function. There were no differences in sexual dimorphism between breeding locations. However, the discriminant function should be used with caution because some penguins may be misclassified. Therefore, when there is doubt about the accuracy of morphometric approaches, application of molecular sexing techniques is recommended. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica antarcticus Elephant Island South Shetland Islands Cambridge University Press South Shetland Islands Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) Stinker Point ENVELOPE(-55.380,-55.380,-61.221,-61.221) Antarctic Science 27 4 327 332 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Brummelhaus, Jaqueline Valiati, Victor Hugo Petry, Maria Virginia Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Chinstrap penguins ( Pygoscelis antarcticus ) show little sexual dimorphism and sexing by direct observation can be difficult. Through molecular techniques, male and female adults were identified at Stinker Point, Elephant Island, South Shetland Islands, in the 2011–12 and 2012–13 breeding seasons. In the assessment of sexual dimorphism using morphological characteristics, males were 6.0–9.4% larger than females. From the most significant morphological measurements, a discriminant function was formulated that classified 80.6% of the birds correctly. In addition, our data on bill length and depth were compared with those in the literature to evaluate sexual dimorphism between different breeding locations and to test the performance of the discriminant function. There were no differences in sexual dimorphism between breeding locations. However, the discriminant function should be used with caution because some penguins may be misclassified. Therefore, when there is doubt about the accuracy of morphometric approaches, application of molecular sexing techniques is recommended. |
format |
Article in Journal/Newspaper |
author |
Brummelhaus, Jaqueline Valiati, Victor Hugo Petry, Maria Virginia |
author_facet |
Brummelhaus, Jaqueline Valiati, Victor Hugo Petry, Maria Virginia |
author_sort |
Brummelhaus, Jaqueline |
title |
Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
title_short |
Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
title_full |
Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
title_fullStr |
Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
title_full_unstemmed |
Morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the South Shetland Islands, Antarctica |
title_sort |
morphometric variation in chinstrap penguins: molecular sexing and discriminant functions in the south shetland islands, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0954102014000820 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102014000820 |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) ENVELOPE(-55.380,-55.380,-61.221,-61.221) |
geographic |
South Shetland Islands Elephant Island Stinker Point |
geographic_facet |
South Shetland Islands Elephant Island Stinker Point |
genre |
Antarc* Antarctic Science Antarctica antarcticus Elephant Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Science Antarctica antarcticus Elephant Island South Shetland Islands |
op_source |
Antarctic Science volume 27, issue 4, page 327-332 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102014000820 |
container_title |
Antarctic Science |
container_volume |
27 |
container_issue |
4 |
container_start_page |
327 |
op_container_end_page |
332 |
_version_ |
1792503086118338560 |