Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas
We studied how environmental conditions affect reproduction in sympatric skua species that differ in their reliance on marine resources: the exclusively marine foraging south polar skua Catharacta maccormicki, the terrestrially foraging brown skua C. antarctica lonnbergi and mixed species pairs with...
Published in: | Marine Ecology Progress Series |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2007
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Online Access: | https://pure.knaw.nl/portal/en/publications/ca3d8654-6885-4d60-a1e6-c02155232560 https://doi.org/10.3354/meps334287 https://hdl.handle.net/20.500.11755/ca3d8654-6885-4d60-a1e6-c02155232560 https://pure.knaw.nl/ws/files/466238/Hahn_ea_3901.pdf |
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ftknawnlpublic:oai:pure.knaw.nl:publications/ca3d8654-6885-4d60-a1e6-c02155232560 2024-02-04T09:55:14+01:00 Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas Hahn, S.M. Reinhardt, K. Ritz, M.S. Janicke, T. Montalti, D. Peter, H.-U. 2007 application/pdf https://pure.knaw.nl/portal/en/publications/ca3d8654-6885-4d60-a1e6-c02155232560 https://doi.org/10.3354/meps334287 https://hdl.handle.net/20.500.11755/ca3d8654-6885-4d60-a1e6-c02155232560 https://pure.knaw.nl/ws/files/466238/Hahn_ea_3901.pdf eng eng info:eu-repo/semantics/openAccess Hahn , S M , Reinhardt , K , Ritz , M S , Janicke , T , Montalti , D & Peter , H-U 2007 , ' Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas ' , Marine Ecology Progress Series , vol. 334 , pp. 287-297 . https://doi.org/10.3354/meps334287 article 2007 ftknawnlpublic https://doi.org/10.3354/meps33428720.500.11755/ca3d8654-6885-4d60-a1e6-c02155232560 2024-01-10T23:12:50Z We studied how environmental conditions affect reproduction in sympatric skua species that differ in their reliance on marine resources: the exclusively marine foraging south polar skua Catharacta maccormicki, the terrestrially foraging brown skua C. antarctica lonnbergi and mixed species pairs with an intermediate diet. Egg size, clutch asymmetry and hatching dates varied between species and years without consistent patterns. In the south polar skuas, 12 to 38% of the variation in these parameters was explained by sea surface temperature, sea ice cover and local weather. In mixed species pairs and brown skuas, the influence of environmental factors on variation in clutch asymmetry and hatching date decreased to 10–29%, and no effect on egg size was found. Annual variation in offspring growth performance also differed between species with variable growth in chicks of south polar skuas and mixed species pairs, and almost uniform growth in brown skuas. Additionally, the dependency on oceanographic and climatic factors, especially local wind conditions, decreased from south polar skuas to brown skua chicks. Consistent in all species, offspring were more sensitive to environmental conditions during early stages; during the late chick stage (>33 d) chick growth was almost independent of environmental conditions. The net breeding success could not be predicted by any environmental factor in any skua species, suggesting it may not be a sensitive indicator of environmental conditions. Hence, the sensitivity of skuas to environmental conditions varied between species, with south polar skuas being more sensitive than brown skuas, and between breeding periods, with the egg parameters being more susceptible to oceanographic conditions. However, during offspring development, local climatic conditions became more important. We conclude that future climate change in the Maritime Antarctic will affect reproduction of skuas more strongly through changes in sea ice cover and sea surface temperature (and the resulting ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Skuas Antarctica Brown Skua Catharacta maccormicki Sea ice South Polar Skuas KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) Antarctic Marine Ecology Progress Series 334 287 297 |
institution |
Open Polar |
collection |
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
We studied how environmental conditions affect reproduction in sympatric skua species that differ in their reliance on marine resources: the exclusively marine foraging south polar skua Catharacta maccormicki, the terrestrially foraging brown skua C. antarctica lonnbergi and mixed species pairs with an intermediate diet. Egg size, clutch asymmetry and hatching dates varied between species and years without consistent patterns. In the south polar skuas, 12 to 38% of the variation in these parameters was explained by sea surface temperature, sea ice cover and local weather. In mixed species pairs and brown skuas, the influence of environmental factors on variation in clutch asymmetry and hatching date decreased to 10–29%, and no effect on egg size was found. Annual variation in offspring growth performance also differed between species with variable growth in chicks of south polar skuas and mixed species pairs, and almost uniform growth in brown skuas. Additionally, the dependency on oceanographic and climatic factors, especially local wind conditions, decreased from south polar skuas to brown skua chicks. Consistent in all species, offspring were more sensitive to environmental conditions during early stages; during the late chick stage (>33 d) chick growth was almost independent of environmental conditions. The net breeding success could not be predicted by any environmental factor in any skua species, suggesting it may not be a sensitive indicator of environmental conditions. Hence, the sensitivity of skuas to environmental conditions varied between species, with south polar skuas being more sensitive than brown skuas, and between breeding periods, with the egg parameters being more susceptible to oceanographic conditions. However, during offspring development, local climatic conditions became more important. We conclude that future climate change in the Maritime Antarctic will affect reproduction of skuas more strongly through changes in sea ice cover and sea surface temperature (and the resulting ... |
format |
Article in Journal/Newspaper |
author |
Hahn, S.M. Reinhardt, K. Ritz, M.S. Janicke, T. Montalti, D. Peter, H.-U. |
spellingShingle |
Hahn, S.M. Reinhardt, K. Ritz, M.S. Janicke, T. Montalti, D. Peter, H.-U. Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
author_facet |
Hahn, S.M. Reinhardt, K. Ritz, M.S. Janicke, T. Montalti, D. Peter, H.-U. |
author_sort |
Hahn, S.M. |
title |
Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
title_short |
Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
title_full |
Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
title_fullStr |
Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
title_full_unstemmed |
Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas |
title_sort |
oceanographic and climatic factors differentially affect reproduction performance of antarctic skuas |
publishDate |
2007 |
url |
https://pure.knaw.nl/portal/en/publications/ca3d8654-6885-4d60-a1e6-c02155232560 https://doi.org/10.3354/meps334287 https://hdl.handle.net/20.500.11755/ca3d8654-6885-4d60-a1e6-c02155232560 https://pure.knaw.nl/ws/files/466238/Hahn_ea_3901.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Skuas Antarctica Brown Skua Catharacta maccormicki Sea ice South Polar Skuas |
genre_facet |
Antarc* Antarctic Antarctic Skuas Antarctica Brown Skua Catharacta maccormicki Sea ice South Polar Skuas |
op_source |
Hahn , S M , Reinhardt , K , Ritz , M S , Janicke , T , Montalti , D & Peter , H-U 2007 , ' Oceanographic and climatic factors differentially affect reproduction performance of Antarctic skuas ' , Marine Ecology Progress Series , vol. 334 , pp. 287-297 . https://doi.org/10.3354/meps334287 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps33428720.500.11755/ca3d8654-6885-4d60-a1e6-c02155232560 |
container_title |
Marine Ecology Progress Series |
container_volume |
334 |
container_start_page |
287 |
op_container_end_page |
297 |
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1789959153553244160 |