Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective
This article is an invited contribution on Life in Antarctica: Boundaries and Gradients in a Changing Environment as the main theme of the XIth SCAR Biology Symposium. J.-M. Gili and R. Zapata Guardiola (Guest Editors). Global change has affected the Antarctic Peninsula influencing the abundance of...
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ftcsic:oai:digital.csic.es:10261/156947 2024-02-11T09:56:52+01:00 Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective D’Amico, Verónica L. Coria, Néstor Palacios, María Gabriela Barbosa, Andrés Bertellotti, Marcelo Ministerio de Economía y Competitividad (España) 2016 http://hdl.handle.net/10261/156947 https://doi.org/10.1007/s00300-014-1604-9 https://doi.org/10.13039/501100003329 unknown Springer Sí doi:10.1007/s00300-014-1604-9 issn: 0722-4060 Polar Biology 39: 57-64 (2016) http://hdl.handle.net/10261/156947 http://dx.doi.org/10.13039/501100003329 none Physiology Pygoscelis penguin Global warming Antarctica artículo http://purl.org/coar/resource_type/c_6501 2016 ftcsic https://doi.org/10.1007/s00300-014-1604-910.13039/501100003329 2024-01-16T10:26:30Z This article is an invited contribution on Life in Antarctica: Boundaries and Gradients in a Changing Environment as the main theme of the XIth SCAR Biology Symposium. J.-M. Gili and R. Zapata Guardiola (Guest Editors). Global change has affected the Antarctic Peninsula influencing the abundance of krill, one of the main preys of penguins. In areas where breeding penguin populations overlap, species with a more diverse diet have generally been less affected than krill-specialist species, which have shown population declines. Human activities can add to these changes, as penguins are sensitive to anthropic impacts such as contamination. Our objective was to assess whether selected physiological parameters of Adélie and Gentoo penguins reflect their contrasting population trends in a colony located at Punta Stranger (25 de Mayo Island/King George, South Shetland Islands) where they breed sympatrically. During 2012, we assessed the leukocyte profile, heterophil to lymphocyte ratio (H/L), erythrocytic nuclear abnormalities (ENAs), hematocrit, biochemical profile, and a measure of immune function (bacterial agglutination) in adults and chicks of both species. Higher values of ENAs, indicative of genotoxic damage caused by contaminants, are in accordance with a greater sensitivity to ongoing global changes by Adélie penguins. Levels of cholesterol and triglycerides strengthen this idea since individuals could be investing more resources in energy reserves to successfully cope with challenging environmental conditions during the breeding season. The remaining physiological parameters did not provide a clear picture. Furthermore, some results could be related to differences in diet. Gentoos show greater prey diversity than Adélie penguins, incorporating a richer parasite fauna, which could explain their higher heterophils and H/L. The physiological parameters measured here serve as baseline for a sustained monitoring of these rapidly changing populations. Further physiological variables, including stress hormone and ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology South Shetland Islands Digital.CSIC (Spanish National Research Council) 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic Antarctic Peninsula South Shetland Islands The Antarctic Polar Biology 39 1 57 64 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Physiology Pygoscelis penguin Global warming Antarctica |
spellingShingle |
Physiology Pygoscelis penguin Global warming Antarctica D’Amico, Verónica L. Coria, Néstor Palacios, María Gabriela Barbosa, Andrés Bertellotti, Marcelo Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
topic_facet |
Physiology Pygoscelis penguin Global warming Antarctica |
description |
This article is an invited contribution on Life in Antarctica: Boundaries and Gradients in a Changing Environment as the main theme of the XIth SCAR Biology Symposium. J.-M. Gili and R. Zapata Guardiola (Guest Editors). Global change has affected the Antarctic Peninsula influencing the abundance of krill, one of the main preys of penguins. In areas where breeding penguin populations overlap, species with a more diverse diet have generally been less affected than krill-specialist species, which have shown population declines. Human activities can add to these changes, as penguins are sensitive to anthropic impacts such as contamination. Our objective was to assess whether selected physiological parameters of Adélie and Gentoo penguins reflect their contrasting population trends in a colony located at Punta Stranger (25 de Mayo Island/King George, South Shetland Islands) where they breed sympatrically. During 2012, we assessed the leukocyte profile, heterophil to lymphocyte ratio (H/L), erythrocytic nuclear abnormalities (ENAs), hematocrit, biochemical profile, and a measure of immune function (bacterial agglutination) in adults and chicks of both species. Higher values of ENAs, indicative of genotoxic damage caused by contaminants, are in accordance with a greater sensitivity to ongoing global changes by Adélie penguins. Levels of cholesterol and triglycerides strengthen this idea since individuals could be investing more resources in energy reserves to successfully cope with challenging environmental conditions during the breeding season. The remaining physiological parameters did not provide a clear picture. Furthermore, some results could be related to differences in diet. Gentoos show greater prey diversity than Adélie penguins, incorporating a richer parasite fauna, which could explain their higher heterophils and H/L. The physiological parameters measured here serve as baseline for a sustained monitoring of these rapidly changing populations. Further physiological variables, including stress hormone and ... |
author2 |
Ministerio de Economía y Competitividad (España) |
format |
Article in Journal/Newspaper |
author |
D’Amico, Verónica L. Coria, Néstor Palacios, María Gabriela Barbosa, Andrés Bertellotti, Marcelo |
author_facet |
D’Amico, Verónica L. Coria, Néstor Palacios, María Gabriela Barbosa, Andrés Bertellotti, Marcelo |
author_sort |
D’Amico, Verónica L. |
title |
Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
title_short |
Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
title_full |
Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
title_fullStr |
Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
title_full_unstemmed |
Physiological differences between two overlapped breeding Antarctic penguins in a global change perspective |
title_sort |
physiological differences between two overlapped breeding antarctic penguins in a global change perspective |
publisher |
Springer |
publishDate |
2016 |
url |
http://hdl.handle.net/10261/156947 https://doi.org/10.1007/s00300-014-1604-9 https://doi.org/10.13039/501100003329 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) |
geographic |
25 de Mayo Antarctic Antarctic Peninsula South Shetland Islands The Antarctic |
geographic_facet |
25 de Mayo Antarctic Antarctic Peninsula South Shetland Islands The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology South Shetland Islands |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Polar Biology South Shetland Islands |
op_relation |
Sí doi:10.1007/s00300-014-1604-9 issn: 0722-4060 Polar Biology 39: 57-64 (2016) http://hdl.handle.net/10261/156947 http://dx.doi.org/10.13039/501100003329 |
op_rights |
none |
op_doi |
https://doi.org/10.1007/s00300-014-1604-910.13039/501100003329 |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
1 |
container_start_page |
57 |
op_container_end_page |
64 |
_version_ |
1790606552940412928 |