Comparative egg attendance patterns of incubating polar petrels
Background: The internal environment of eggs in most birds is regulated by transferring heat energy through contact incubation, maintaining nest microclimate, and frequent egg turning by the incubating parent on its nest. However, we lack information about egg attendance patterns in birds that breed...
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ftsanjosestate:oai:scholarworks.sjsu.edu:faculty_rsca-3383 2023-07-30T03:58:34+02:00 Comparative egg attendance patterns of incubating polar petrels Shaffer, Scott A. Blévin, Pierre Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri 2021-12-01T08:00:00Z application/pdf https://scholarworks.sjsu.edu/faculty_rsca/2384 https://doi.org/10.1186/s40317-021-00240-4 https://scholarworks.sjsu.edu/context/faculty_rsca/article/3383/viewcontent/s40317_021_00240_4.pdf unknown SJSU ScholarWorks https://scholarworks.sjsu.edu/faculty_rsca/2384 doi:10.1186/s40317-021-00240-4 https://scholarworks.sjsu.edu/context/faculty_rsca/article/3383/viewcontent/s40317_021_00240_4.pdf http://creativecommons.org/licenses/by/4.0/ Faculty Research, Scholarly, and Creative Activity Biologging Cape petrel Egg neglect Egg temperatures Egg turning rates Snow petrel Biological Sciences text 2021 ftsanjosestate https://doi.org/10.1186/s40317-021-00240-4 2023-07-17T19:09:29Z Background: The internal environment of eggs in most birds is regulated by transferring heat energy through contact incubation, maintaining nest microclimate, and frequent egg turning by the incubating parent on its nest. However, we lack information about egg attendance patterns in birds that breed in polar environments where variations in life history are expected to influence incubation behavior. Moreover, crevice/burrow nesting petrels in high-latitude regions are known for periodically leaving their egg unattended (hereafter ‘egg neglect’), but there is little reporting on the internal condition of unattended eggs. At Dumont d’Urville Station, Antarctica, we studied the incubation behavior of 24 snow (Pagodroma nivea) and 15 Cape (Daption capense) petrel pairs using egg loggers that recorded egg turning rates, orientation changes, and temperatures at 1 Hz for durations of 3–6 days. Results: Egg turning frequency (1.31 ± 0.33 vs. 1.38 ± 0.39 turns h−1), angle change per turn (43.1 ± 43.2 vs. 48.6 ± 43.7° turn−1), and egg temperature (34.1 ± 2.3 vs. 34.1 ± 2.0 °C) were nearly identical for snow and Cape petrels, respectively. However, egg neglect was only observed in snow petrel nests (based on egg temperature changes) where loggers recorded mean durations of 1.34 ± 1.15 days (maximum duration of 3.63 days). During periods of neglect, eggs cooled to 5.5 ± 1.8 °C over an average of 91 min, but were rewarmed by parents in only 76 min at a rate of 0.33 °C min−1. Conclusions: Egg temperatures of both species during regular incubation were within 1–2 °C of other high-latitude petrel species, but neglected snow petrel eggs remained several degrees above freezing, which was likely attributed to crevice nesting where neglected eggs are buffered by environmental conditions. Using egg rewarming rates, thermal capacity of eggs, and published metabolic rates, we estimate egg rewarming costs in snow petrels to be 1.5 to 1.9 × BMR. Excluding egg neglect periods, turning rates for both petrel species were lower than other ... Text Antarc* Antarctica Cape Petrel Cape Petrels Daption capense Snow Petrel Snow Petrels San José State University: SJSU ScholarWorks Nivea ENVELOPE(-45.479,-45.479,-60.580,-60.580) Dumont d’Urville ENVELOPE(140.000,140.000,-66.667,-66.667) Animal Biotelemetry 9 1 |
institution |
Open Polar |
collection |
San José State University: SJSU ScholarWorks |
op_collection_id |
ftsanjosestate |
language |
unknown |
topic |
Biologging Cape petrel Egg neglect Egg temperatures Egg turning rates Snow petrel Biological Sciences |
spellingShingle |
Biologging Cape petrel Egg neglect Egg temperatures Egg turning rates Snow petrel Biological Sciences Shaffer, Scott A. Blévin, Pierre Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri Comparative egg attendance patterns of incubating polar petrels |
topic_facet |
Biologging Cape petrel Egg neglect Egg temperatures Egg turning rates Snow petrel Biological Sciences |
description |
Background: The internal environment of eggs in most birds is regulated by transferring heat energy through contact incubation, maintaining nest microclimate, and frequent egg turning by the incubating parent on its nest. However, we lack information about egg attendance patterns in birds that breed in polar environments where variations in life history are expected to influence incubation behavior. Moreover, crevice/burrow nesting petrels in high-latitude regions are known for periodically leaving their egg unattended (hereafter ‘egg neglect’), but there is little reporting on the internal condition of unattended eggs. At Dumont d’Urville Station, Antarctica, we studied the incubation behavior of 24 snow (Pagodroma nivea) and 15 Cape (Daption capense) petrel pairs using egg loggers that recorded egg turning rates, orientation changes, and temperatures at 1 Hz for durations of 3–6 days. Results: Egg turning frequency (1.31 ± 0.33 vs. 1.38 ± 0.39 turns h−1), angle change per turn (43.1 ± 43.2 vs. 48.6 ± 43.7° turn−1), and egg temperature (34.1 ± 2.3 vs. 34.1 ± 2.0 °C) were nearly identical for snow and Cape petrels, respectively. However, egg neglect was only observed in snow petrel nests (based on egg temperature changes) where loggers recorded mean durations of 1.34 ± 1.15 days (maximum duration of 3.63 days). During periods of neglect, eggs cooled to 5.5 ± 1.8 °C over an average of 91 min, but were rewarmed by parents in only 76 min at a rate of 0.33 °C min−1. Conclusions: Egg temperatures of both species during regular incubation were within 1–2 °C of other high-latitude petrel species, but neglected snow petrel eggs remained several degrees above freezing, which was likely attributed to crevice nesting where neglected eggs are buffered by environmental conditions. Using egg rewarming rates, thermal capacity of eggs, and published metabolic rates, we estimate egg rewarming costs in snow petrels to be 1.5 to 1.9 × BMR. Excluding egg neglect periods, turning rates for both petrel species were lower than other ... |
format |
Text |
author |
Shaffer, Scott A. Blévin, Pierre Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri |
author_facet |
Shaffer, Scott A. Blévin, Pierre Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri |
author_sort |
Shaffer, Scott A. |
title |
Comparative egg attendance patterns of incubating polar petrels |
title_short |
Comparative egg attendance patterns of incubating polar petrels |
title_full |
Comparative egg attendance patterns of incubating polar petrels |
title_fullStr |
Comparative egg attendance patterns of incubating polar petrels |
title_full_unstemmed |
Comparative egg attendance patterns of incubating polar petrels |
title_sort |
comparative egg attendance patterns of incubating polar petrels |
publisher |
SJSU ScholarWorks |
publishDate |
2021 |
url |
https://scholarworks.sjsu.edu/faculty_rsca/2384 https://doi.org/10.1186/s40317-021-00240-4 https://scholarworks.sjsu.edu/context/faculty_rsca/article/3383/viewcontent/s40317_021_00240_4.pdf |
long_lat |
ENVELOPE(-45.479,-45.479,-60.580,-60.580) ENVELOPE(140.000,140.000,-66.667,-66.667) |
geographic |
Nivea Dumont d’Urville |
geographic_facet |
Nivea Dumont d’Urville |
genre |
Antarc* Antarctica Cape Petrel Cape Petrels Daption capense Snow Petrel Snow Petrels |
genre_facet |
Antarc* Antarctica Cape Petrel Cape Petrels Daption capense Snow Petrel Snow Petrels |
op_source |
Faculty Research, Scholarly, and Creative Activity |
op_relation |
https://scholarworks.sjsu.edu/faculty_rsca/2384 doi:10.1186/s40317-021-00240-4 https://scholarworks.sjsu.edu/context/faculty_rsca/article/3383/viewcontent/s40317_021_00240_4.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1186/s40317-021-00240-4 |
container_title |
Animal Biotelemetry |
container_volume |
9 |
container_issue |
1 |
_version_ |
1772821336290230272 |