Incubation temperature in the Australasian Gannet Moms senator
Gannets (Sulidae) and some other pelecaniforms incubate their eggs under the webs of their totipalmate feet. These species have a wide latitudinal distribution from tropics to subarctic, but little is known of the incubation temperatures attained. I measured egg temperatures of the Australasian Gann...
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crwiley:10.1111/j.1474-919x.1995.tb08030.x 2024-06-02T08:15:02+00:00 Incubation temperature in the Australasian Gannet Moms senator EVANS, ROGER M. 1995 http://dx.doi.org/10.1111/j.1474-919x.1995.tb08030.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1995.tb08030.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1995.tb08030.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 137, issue 3, page 340-344 ISSN 0019-1019 1474-919X journal-article 1995 crwiley https://doi.org/10.1111/j.1474-919x.1995.tb08030.x 2024-05-03T11:24:12Z Gannets (Sulidae) and some other pelecaniforms incubate their eggs under the webs of their totipalmate feet. These species have a wide latitudinal distribution from tropics to subarctic, but little is known of the incubation temperatures attained. I measured egg temperatures of the Australasian Gannet Morns serrator at Cape Kidnappers, New Zealand, employing a data logger to obtain records every 15 min for day‐long sample periods at undisturbed nests. Egg surface temperatures were relatively stable and little affected by ambient temperature. Mean surface temperature of natural eggs was 34.9 o C for samples taken during the first 4 days of incubation, but this then increased and stabilized at 36.5 o C. Internal temperature of pipped eggs was about 1 o C higher, attributable to embryonic heat production. Upper surface temperature of eggs kept in a fixed position was about 2 o C below deep adult body temperature (40.3 o C), suggesting heat is transferred directly from the body through the feet. Clutch size does not appear to be limited by an inability to warm two eggs. These results are in general agreement with measurements from other web incubators and are well within the range for species with conventional brood patch incubation. Article in Journal/Newspaper Subarctic Wiley Online Library New Zealand Ibis 137 3 340 344 |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Gannets (Sulidae) and some other pelecaniforms incubate their eggs under the webs of their totipalmate feet. These species have a wide latitudinal distribution from tropics to subarctic, but little is known of the incubation temperatures attained. I measured egg temperatures of the Australasian Gannet Morns serrator at Cape Kidnappers, New Zealand, employing a data logger to obtain records every 15 min for day‐long sample periods at undisturbed nests. Egg surface temperatures were relatively stable and little affected by ambient temperature. Mean surface temperature of natural eggs was 34.9 o C for samples taken during the first 4 days of incubation, but this then increased and stabilized at 36.5 o C. Internal temperature of pipped eggs was about 1 o C higher, attributable to embryonic heat production. Upper surface temperature of eggs kept in a fixed position was about 2 o C below deep adult body temperature (40.3 o C), suggesting heat is transferred directly from the body through the feet. Clutch size does not appear to be limited by an inability to warm two eggs. These results are in general agreement with measurements from other web incubators and are well within the range for species with conventional brood patch incubation. |
format |
Article in Journal/Newspaper |
author |
EVANS, ROGER M. |
spellingShingle |
EVANS, ROGER M. Incubation temperature in the Australasian Gannet Moms senator |
author_facet |
EVANS, ROGER M. |
author_sort |
EVANS, ROGER M. |
title |
Incubation temperature in the Australasian Gannet Moms senator |
title_short |
Incubation temperature in the Australasian Gannet Moms senator |
title_full |
Incubation temperature in the Australasian Gannet Moms senator |
title_fullStr |
Incubation temperature in the Australasian Gannet Moms senator |
title_full_unstemmed |
Incubation temperature in the Australasian Gannet Moms senator |
title_sort |
incubation temperature in the australasian gannet moms senator |
publisher |
Wiley |
publishDate |
1995 |
url |
http://dx.doi.org/10.1111/j.1474-919x.1995.tb08030.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1995.tb08030.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1995.tb08030.x |
geographic |
New Zealand |
geographic_facet |
New Zealand |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Ibis volume 137, issue 3, page 340-344 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.1995.tb08030.x |
container_title |
Ibis |
container_volume |
137 |
container_issue |
3 |
container_start_page |
340 |
op_container_end_page |
344 |
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1800739096021172224 |