Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica
Abstract Every year, shortly after the emancipation of chicks at our study colony (Deception Island, South Shetlands), hundreds of carcasses of presumably starved Chinstrap penguin Pygoscelis antarctica chicks are washed on the shore. In 1997 we measured the flippers of fresh carcasses and compared...
Published in: | Journal of Evolutionary Biology |
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Oxford University Press (OUP)
1999
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Online Access: | http://dx.doi.org/10.1046/j.1420-9101.1999.00032.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1420-9101.1999.00032.x https://academic.oup.com/jeb/article-pdf/12/3/507/54434490/j.1420-9101.1999.00032.x.pdf |
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croxfordunivpr:10.1046/j.1420-9101.1999.00032.x 2024-02-11T09:57:07+01:00 Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica Moreno Barbosa León Fargallo 1999 http://dx.doi.org/10.1046/j.1420-9101.1999.00032.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1420-9101.1999.00032.x https://academic.oup.com/jeb/article-pdf/12/3/507/54434490/j.1420-9101.1999.00032.x.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Evolutionary Biology volume 12, issue 3, page 507-513 ISSN 1010-061X 1420-9101 Ecology, Evolution, Behavior and Systematics journal-article 1999 croxfordunivpr https://doi.org/10.1046/j.1420-9101.1999.00032.x 2024-01-12T09:43:24Z Abstract Every year, shortly after the emancipation of chicks at our study colony (Deception Island, South Shetlands), hundreds of carcasses of presumably starved Chinstrap penguin Pygoscelis antarctica chicks are washed on the shore. In 1997 we measured the flippers of fresh carcasses and compared their lengths with those of live chicks about to become independent. There was a highly significant difference of 6.5 mm between both distributions, which suggests strong directional phenotypic selection on skeletal size operating through its association with body reserves at independence. Given that heritabilities of flipper length and body weight measured on 36 families are 0.73(± 0.32) and 0.075(± 0.081), and that both characters show a genetic correlation of 0.44(± 0.14), we can expect an evolutionary response to this selection episode. Assuming that the target of selection is weight at emancipation (heavier chicks carry proportionally larger reserves), and that flipper length changes as a consequence of its genetic correlation with weight, we can predict a response of 1.32–2.87 mm or 0.23–0.51 standard deviation units for flipper length. This substantial evolutionary response may be countered by other selective pressures affecting other life stages of these birds. Selection on reserve storage capacity at independence may affect morphological traits also in other species. Article in Journal/Newspaper Antarc* Antarctica Chinstrap penguin Deception Island Pygoscelis antarctica Oxford University Press Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Journal of Evolutionary Biology 12 3 507 513 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Moreno Barbosa León Fargallo Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Abstract Every year, shortly after the emancipation of chicks at our study colony (Deception Island, South Shetlands), hundreds of carcasses of presumably starved Chinstrap penguin Pygoscelis antarctica chicks are washed on the shore. In 1997 we measured the flippers of fresh carcasses and compared their lengths with those of live chicks about to become independent. There was a highly significant difference of 6.5 mm between both distributions, which suggests strong directional phenotypic selection on skeletal size operating through its association with body reserves at independence. Given that heritabilities of flipper length and body weight measured on 36 families are 0.73(± 0.32) and 0.075(± 0.081), and that both characters show a genetic correlation of 0.44(± 0.14), we can expect an evolutionary response to this selection episode. Assuming that the target of selection is weight at emancipation (heavier chicks carry proportionally larger reserves), and that flipper length changes as a consequence of its genetic correlation with weight, we can predict a response of 1.32–2.87 mm or 0.23–0.51 standard deviation units for flipper length. This substantial evolutionary response may be countered by other selective pressures affecting other life stages of these birds. Selection on reserve storage capacity at independence may affect morphological traits also in other species. |
format |
Article in Journal/Newspaper |
author |
Moreno Barbosa León Fargallo |
author_facet |
Moreno Barbosa León Fargallo |
author_sort |
Moreno |
title |
Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
title_short |
Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
title_full |
Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
title_fullStr |
Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
title_full_unstemmed |
Phenotypic selection on morphology at independence in the Chinstrap penguin Pygoscelis antarctica |
title_sort |
phenotypic selection on morphology at independence in the chinstrap penguin pygoscelis antarctica |
publisher |
Oxford University Press (OUP) |
publishDate |
1999 |
url |
http://dx.doi.org/10.1046/j.1420-9101.1999.00032.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1420-9101.1999.00032.x https://onlinelibrary.wiley.com/doi/full-xml/10.1046/j.1420-9101.1999.00032.x https://academic.oup.com/jeb/article-pdf/12/3/507/54434490/j.1420-9101.1999.00032.x.pdf |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Deception Island |
geographic_facet |
Deception Island |
genre |
Antarc* Antarctica Chinstrap penguin Deception Island Pygoscelis antarctica |
genre_facet |
Antarc* Antarctica Chinstrap penguin Deception Island Pygoscelis antarctica |
op_source |
Journal of Evolutionary Biology volume 12, issue 3, page 507-513 ISSN 1010-061X 1420-9101 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1420-9101.1999.00032.x |
container_title |
Journal of Evolutionary Biology |
container_volume |
12 |
container_issue |
3 |
container_start_page |
507 |
op_container_end_page |
513 |
_version_ |
1790608729762168832 |