The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese
Abstract Dummy eggs were added to naturally incubated clutches of Greater Snow Geese (Chen caerulescens atlantica), an arctic-nesting species, in order to evaluate egg temperature during laying and incubation, and factors influencing egg cooling rate during female recesses. As laying progressed, bot...
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Online Access: | http://dx.doi.org/10.1093/condor/102.2.292 http://academic.oup.com/condor/article-pdf/102/2/292/29710498/condor0292.pdf |
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croxfordunivpr:10.1093/condor/102.2.292 2024-09-09T19:23:15+00:00 The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese Poussart, Catherine Larochelle, Jacques Gauthier, Gilles 2000 http://dx.doi.org/10.1093/condor/102.2.292 http://academic.oup.com/condor/article-pdf/102/2/292/29710498/condor0292.pdf en eng Oxford University Press (OUP) The Condor volume 102, issue 2, page 292-300 ISSN 0010-5422 1938-5129 journal-article 2000 croxfordunivpr https://doi.org/10.1093/condor/102.2.292 2024-08-12T04:25:25Z Abstract Dummy eggs were added to naturally incubated clutches of Greater Snow Geese (Chen caerulescens atlantica), an arctic-nesting species, in order to evaluate egg temperature during laying and incubation, and factors influencing egg cooling rate during female recesses. As laying progressed, both nest attentiveness by females and egg temperature progressively increased. Although the time spent at nest after laying the penultimate egg was relatively high (69% vs. 91% during incubation), mean egg temperature was still 5.7°C lower than during the early incubation period. This suggests that little embryonic development began before clutch completion. Thereafter, egg temperature averaged 37.1 ± 0.1°C during periods where females were present, a value that decreased only slightly when incubation recesses are included (36.8°C). This is a high temperature in comparison to other arctic-nesting geese. A modest increase (1.7°C) in mean egg temperature was observed as incubation progressed, but egg temperature was not influenced by clutch size or by the laying date of the first egg. During recesses lasting 24.7 ± 1.3 min on average, egg temperature dropped by 2.8 ± 0.3°C, at an instantaneous rate of 0.23 ± 0.02°C hr−1 °C−1. Cooling rates increased under windy conditions and decreased with high solar radiation, but were little affected by air temperature. Article in Journal/Newspaper Arctic Oxford University Press Arctic The Condor 102 2 292 300 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Dummy eggs were added to naturally incubated clutches of Greater Snow Geese (Chen caerulescens atlantica), an arctic-nesting species, in order to evaluate egg temperature during laying and incubation, and factors influencing egg cooling rate during female recesses. As laying progressed, both nest attentiveness by females and egg temperature progressively increased. Although the time spent at nest after laying the penultimate egg was relatively high (69% vs. 91% during incubation), mean egg temperature was still 5.7°C lower than during the early incubation period. This suggests that little embryonic development began before clutch completion. Thereafter, egg temperature averaged 37.1 ± 0.1°C during periods where females were present, a value that decreased only slightly when incubation recesses are included (36.8°C). This is a high temperature in comparison to other arctic-nesting geese. A modest increase (1.7°C) in mean egg temperature was observed as incubation progressed, but egg temperature was not influenced by clutch size or by the laying date of the first egg. During recesses lasting 24.7 ± 1.3 min on average, egg temperature dropped by 2.8 ± 0.3°C, at an instantaneous rate of 0.23 ± 0.02°C hr−1 °C−1. Cooling rates increased under windy conditions and decreased with high solar radiation, but were little affected by air temperature. |
format |
Article in Journal/Newspaper |
author |
Poussart, Catherine Larochelle, Jacques Gauthier, Gilles |
spellingShingle |
Poussart, Catherine Larochelle, Jacques Gauthier, Gilles The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
author_facet |
Poussart, Catherine Larochelle, Jacques Gauthier, Gilles |
author_sort |
Poussart, Catherine |
title |
The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
title_short |
The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
title_full |
The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
title_fullStr |
The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
title_full_unstemmed |
The Thermal Regime of Eggs During Laying and Incubation in Greater Snow Geese |
title_sort |
thermal regime of eggs during laying and incubation in greater snow geese |
publisher |
Oxford University Press (OUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1093/condor/102.2.292 http://academic.oup.com/condor/article-pdf/102/2/292/29710498/condor0292.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
The Condor volume 102, issue 2, page 292-300 ISSN 0010-5422 1938-5129 |
op_doi |
https://doi.org/10.1093/condor/102.2.292 |
container_title |
The Condor |
container_volume |
102 |
container_issue |
2 |
container_start_page |
292 |
op_container_end_page |
300 |
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1809763658403676160 |