Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins
The population dynamics of Antarctic seabirds are influenced by variations in winter sea ice extent and persistence; however, the type of relationship differs according to the region and the demographic parameter considered. We used annual presence/absence data obtained from 1,138 individually marke...
Published in: | Oecologia |
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Online Access: | http://hdl.handle.net/11365/26338 https://doi.org/10.1007/s00442-009-1387-9 |
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ftunivsiena:oai:usiena-air.unisi.it:11365/26338 2024-04-14T08:04:09+00:00 Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins BALLERINI, T. TAVECCHIA, G. OLMASTRONI, S. PEZZO, F. FOCARDI, S. Ballerini, T. Tavecchia, G. Olmastroni, S. Pezzo, F. Focardi, S. 2009 STAMPA http://hdl.handle.net/11365/26338 https://doi.org/10.1007/s00442-009-1387-9 eng eng info:eu-repo/semantics/altIdentifier/pmid/19543920 info:eu-repo/semantics/altIdentifier/wos/WOS:000268548000004 volume:161 issue:2 firstpage:253 lastpage:265 numberofpages:13 journal:OECOLOGIA http://hdl.handle.net/11365/26338 doi:10.1007/s00442-009-1387-9 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-70349138713 info:eu-repo/semantics/closedAccess Age dependence . Capture-mark-recapture Life history . Population dynamics . Southern Oscillation Index info:eu-repo/semantics/article 2009 ftunivsiena https://doi.org/10.1007/s00442-009-1387-9 2024-03-21T16:01:28Z The population dynamics of Antarctic seabirds are influenced by variations in winter sea ice extent and persistence; however, the type of relationship differs according to the region and the demographic parameter considered. We used annual presence/absence data obtained from 1,138 individually marked birds to study the influence of environmental and individual characteristics on the survival of Adélie penguins Pygoscelis adeliae at Edmonson Point (Ross Sea, Antarctica) between 1994 and 2005. About 25% of 600 birds marked as chicks were reobserved at the natal colony. The capture and survival rates of Adélie penguins at this colony increased with the age of individuals, and five age classes were identified for both parameters. Mean adult survival was 0.85 (SE = 0.01), and no effect of sex on survival was evident. Breeding propensity, as measured by adult capture rates, was close to one, indicating a constant breeding effort through time. Temporal variations in survival were best explained by a quadratic relationship with winter sea ice extent anomalies in the Ross Sea, suggesting that for this region optimal conditions are intermediate between too much and too little winter sea ice. This is likely the result of a balance between suitable wintering habitat and food availability. Survival rates were not correlated with the Southern Oscillation Index. Low adult survival after a season characterized by severe environmental conditions at breeding but favorable conditions during winter suggested an additional mortality mediated by the reproductive effort. Adélie penguins are sensitive indicators of environmental changes in the Antarctic, and the results from this study provide insights into regional responses of this species to variability in winter sea ice habitat. © Springer-Verlag 2009. Article in Journal/Newspaper Antarc* Antarctic Antarctica Pygoscelis adeliae Ross Sea Sea ice Università degli Studi di Siena: USiena air Antarctic Edmonson Point ENVELOPE(165.133,165.133,-74.333,-74.333) Ross Sea The Antarctic Oecologia 161 2 253 265 |
institution |
Open Polar |
collection |
Università degli Studi di Siena: USiena air |
op_collection_id |
ftunivsiena |
language |
English |
topic |
Age dependence . Capture-mark-recapture Life history . Population dynamics . Southern Oscillation Index |
spellingShingle |
Age dependence . Capture-mark-recapture Life history . Population dynamics . Southern Oscillation Index BALLERINI, T. TAVECCHIA, G. OLMASTRONI, S. PEZZO, F. FOCARDI, S. Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
topic_facet |
Age dependence . Capture-mark-recapture Life history . Population dynamics . Southern Oscillation Index |
description |
The population dynamics of Antarctic seabirds are influenced by variations in winter sea ice extent and persistence; however, the type of relationship differs according to the region and the demographic parameter considered. We used annual presence/absence data obtained from 1,138 individually marked birds to study the influence of environmental and individual characteristics on the survival of Adélie penguins Pygoscelis adeliae at Edmonson Point (Ross Sea, Antarctica) between 1994 and 2005. About 25% of 600 birds marked as chicks were reobserved at the natal colony. The capture and survival rates of Adélie penguins at this colony increased with the age of individuals, and five age classes were identified for both parameters. Mean adult survival was 0.85 (SE = 0.01), and no effect of sex on survival was evident. Breeding propensity, as measured by adult capture rates, was close to one, indicating a constant breeding effort through time. Temporal variations in survival were best explained by a quadratic relationship with winter sea ice extent anomalies in the Ross Sea, suggesting that for this region optimal conditions are intermediate between too much and too little winter sea ice. This is likely the result of a balance between suitable wintering habitat and food availability. Survival rates were not correlated with the Southern Oscillation Index. Low adult survival after a season characterized by severe environmental conditions at breeding but favorable conditions during winter suggested an additional mortality mediated by the reproductive effort. Adélie penguins are sensitive indicators of environmental changes in the Antarctic, and the results from this study provide insights into regional responses of this species to variability in winter sea ice habitat. © Springer-Verlag 2009. |
author2 |
Ballerini, T. Tavecchia, G. Olmastroni, S. Pezzo, F. Focardi, S. |
format |
Article in Journal/Newspaper |
author |
BALLERINI, T. TAVECCHIA, G. OLMASTRONI, S. PEZZO, F. FOCARDI, S. |
author_facet |
BALLERINI, T. TAVECCHIA, G. OLMASTRONI, S. PEZZO, F. FOCARDI, S. |
author_sort |
BALLERINI, T. |
title |
Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
title_short |
Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
title_full |
Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
title_fullStr |
Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
title_full_unstemmed |
Nonlinear effects of winter sea ice on the survival probabilities of Adelie penguins |
title_sort |
nonlinear effects of winter sea ice on the survival probabilities of adelie penguins |
publishDate |
2009 |
url |
http://hdl.handle.net/11365/26338 https://doi.org/10.1007/s00442-009-1387-9 |
long_lat |
ENVELOPE(165.133,165.133,-74.333,-74.333) |
geographic |
Antarctic Edmonson Point Ross Sea The Antarctic |
geographic_facet |
Antarctic Edmonson Point Ross Sea The Antarctic |
genre |
Antarc* Antarctic Antarctica Pygoscelis adeliae Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Pygoscelis adeliae Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/19543920 info:eu-repo/semantics/altIdentifier/wos/WOS:000268548000004 volume:161 issue:2 firstpage:253 lastpage:265 numberofpages:13 journal:OECOLOGIA http://hdl.handle.net/11365/26338 doi:10.1007/s00442-009-1387-9 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-70349138713 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00442-009-1387-9 |
container_title |
Oecologia |
container_volume |
161 |
container_issue |
2 |
container_start_page |
253 |
op_container_end_page |
265 |
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1796300551233732608 |