Nonlinear effects of winter sea ice on the survival probabilities of Adélie 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...
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ftcsic:oai:digital.csic.es:10261/103651 2024-02-11T09:56:25+01:00 Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins Ballerini, Tosca Tavecchia, Giacomo Olmastroni, Silvia Pezzo, Francesco Focardi, Silvano 2009-07-02 http://hdl.handle.net/10261/103651 https://doi.org/10.1007/s00442-009-1387-9 unknown Springer http://dx.doi.org/10.1007/s00442-009-1387-9 doi:10.1007/s00442-009-1387-9 issn: 0029-8549 Oecologia 161(2): 253-265 (2009) http://hdl.handle.net/10261/103651 none Southern Oscillation Index Population dynamics Life history Capture-mark-recapture Age dependence artículo http://purl.org/coar/resource_type/c_6501 2009 ftcsic https://doi.org/10.1007/s00442-009-1387-9 2024-01-16T10:01:54Z 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. This work was supported by the Italian Antarctic Research Program (PNRA) and by the Italian Ministry for University and Research (MIUR). The Australian Antarctic Division (AAD) provided the APMS Peer Reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctica Australian Antarctic Division Pygoscelis adeliae Ross Sea Sea ice Digital.CSIC (Spanish National Research Council) 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 |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
Southern Oscillation Index Population dynamics Life history Capture-mark-recapture Age dependence |
spellingShingle |
Southern Oscillation Index Population dynamics Life history Capture-mark-recapture Age dependence Ballerini, Tosca Tavecchia, Giacomo Olmastroni, Silvia Pezzo, Francesco Focardi, Silvano Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
topic_facet |
Southern Oscillation Index Population dynamics Life history Capture-mark-recapture Age dependence |
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. This work was supported by the Italian Antarctic Research Program (PNRA) and by the Italian Ministry for University and Research (MIUR). The Australian Antarctic Division (AAD) provided the APMS Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Ballerini, Tosca Tavecchia, Giacomo Olmastroni, Silvia Pezzo, Francesco Focardi, Silvano |
author_facet |
Ballerini, Tosca Tavecchia, Giacomo Olmastroni, Silvia Pezzo, Francesco Focardi, Silvano |
author_sort |
Ballerini, Tosca |
title |
Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
title_short |
Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
title_full |
Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
title_fullStr |
Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
title_full_unstemmed |
Nonlinear effects of winter sea ice on the survival probabilities of Adélie penguins |
title_sort |
nonlinear effects of winter sea ice on the survival probabilities of adélie penguins |
publisher |
Springer |
publishDate |
2009 |
url |
http://hdl.handle.net/10261/103651 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 Australian Antarctic Division Pygoscelis adeliae Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Australian Antarctic Division Pygoscelis adeliae Ross Sea Sea ice |
op_relation |
http://dx.doi.org/10.1007/s00442-009-1387-9 doi:10.1007/s00442-009-1387-9 issn: 0029-8549 Oecologia 161(2): 253-265 (2009) http://hdl.handle.net/10261/103651 |
op_rights |
none |
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 |
_version_ |
1790602997765505024 |