The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability
In many seabird studies, single annual proxies of prey abundance have been used to explain variability in breeding performance, but much more important is probably the timing of prey availability relative to the breeding season when energy demand is at a maximum. Until now, intraseasonal variation i...
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Online Access: | http://hdl.handle.net/11250/285914 https://doi.org/10.1002/ece3.1438 |
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ftnorduniv:oai:nordopen.nord.no:11250/285914 2023-05-15T15:39:10+02:00 The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability Barrett, Robert T. Erikstad, Kjell E. Sandvik, Hanno Myksvoll, Mari Skuggedal Jenni-Eiermann, Susi Kristensen, Ditte Lyngbo Moum, Truls Reiertsen, Tone K. Vikebø, Frode Bendiksen 2015-06-26T13:20:44Z application/pdf http://hdl.handle.net/11250/285914 https://doi.org/10.1002/ece3.1438 eng eng Wiley Norges forskningsråd: 216547 Barrett, R.T., Erikstad, K.E., Sandvik, H., Myksvoll, M.S., Jenni-Eiermann, S., Kristensen, D.L., . Vikebø, F.B. (2015). The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability. Ecology and Evolution, 5(6), 1306-1317. doi: urn:issn:2045-7758 http://hdl.handle.net/11250/285914 https://doi.org/10.1002/ece3.1438 cristin:1229608 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ © 2015, The Author(s) CC-BY 1306-1317 5 Ecology and Evolution 6 VDP::Mathematics and natural science: 400::Zoology and botany: 480 Journal article Peer reviewed 2015 ftnorduniv https://doi.org/10.1002/ece3.1438 2021-07-13T18:12:34Z In many seabird studies, single annual proxies of prey abundance have been used to explain variability in breeding performance, but much more important is probably the timing of prey availability relative to the breeding season when energy demand is at a maximum. Until now, intraseasonal variation in prey availability has been difficult to quantify in seabirds. Using a state-of-the-art ocean drift model of larval cod Gadus morhua, an important constituent of the diet of common guillemots Uria aalge in the southwestern Barents Sea, we were able to show clear, short-term correlations between food availability and measurements of the stress hormone corticosterone (CORT) in parental guillemots over a 3-year period (2009–2011). The model allowed the extraction of abundance and size of cod larvae with very high spatial (4 km) and temporal resolutions (1 day) and showed that cod larvae from adjacent northern spawning grounds in Norway were always available near the guillemot breeding colony while those from more distant southerly spawning grounds were less frequent, but larger. The latter arrived in waves whose magnitude and timing, and thus overlap with the guillemot breeding season, varied between years. CORT levels in adult guillemots were lower in birds caught after a week with high frequencies of southern cod larvae. This pattern was restricted to the two years (2009 and 2010) in which southern larvae arrived before the end of the guillemot breeding season. Any such pattern was masked in 2011 by already exceptionally high numbers of cod larvae in the region throughout chick-rearing period. The findings suggest that CORT levels in breeding birds increase when the arrival of southern sizable larvae does not match the period of peak energy requirements during breeding. Article in Journal/Newspaper Barents Sea Gadus morhua Uria aalge uria Open archive Nord universitet Barents Sea Norway Ecology and Evolution 5 6 1306 1317 |
institution |
Open Polar |
collection |
Open archive Nord universitet |
op_collection_id |
ftnorduniv |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 Barrett, Robert T. Erikstad, Kjell E. Sandvik, Hanno Myksvoll, Mari Skuggedal Jenni-Eiermann, Susi Kristensen, Ditte Lyngbo Moum, Truls Reiertsen, Tone K. Vikebø, Frode Bendiksen The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 |
description |
In many seabird studies, single annual proxies of prey abundance have been used to explain variability in breeding performance, but much more important is probably the timing of prey availability relative to the breeding season when energy demand is at a maximum. Until now, intraseasonal variation in prey availability has been difficult to quantify in seabirds. Using a state-of-the-art ocean drift model of larval cod Gadus morhua, an important constituent of the diet of common guillemots Uria aalge in the southwestern Barents Sea, we were able to show clear, short-term correlations between food availability and measurements of the stress hormone corticosterone (CORT) in parental guillemots over a 3-year period (2009–2011). The model allowed the extraction of abundance and size of cod larvae with very high spatial (4 km) and temporal resolutions (1 day) and showed that cod larvae from adjacent northern spawning grounds in Norway were always available near the guillemot breeding colony while those from more distant southerly spawning grounds were less frequent, but larger. The latter arrived in waves whose magnitude and timing, and thus overlap with the guillemot breeding season, varied between years. CORT levels in adult guillemots were lower in birds caught after a week with high frequencies of southern cod larvae. This pattern was restricted to the two years (2009 and 2010) in which southern larvae arrived before the end of the guillemot breeding season. Any such pattern was masked in 2011 by already exceptionally high numbers of cod larvae in the region throughout chick-rearing period. The findings suggest that CORT levels in breeding birds increase when the arrival of southern sizable larvae does not match the period of peak energy requirements during breeding. |
format |
Article in Journal/Newspaper |
author |
Barrett, Robert T. Erikstad, Kjell E. Sandvik, Hanno Myksvoll, Mari Skuggedal Jenni-Eiermann, Susi Kristensen, Ditte Lyngbo Moum, Truls Reiertsen, Tone K. Vikebø, Frode Bendiksen |
author_facet |
Barrett, Robert T. Erikstad, Kjell E. Sandvik, Hanno Myksvoll, Mari Skuggedal Jenni-Eiermann, Susi Kristensen, Ditte Lyngbo Moum, Truls Reiertsen, Tone K. Vikebø, Frode Bendiksen |
author_sort |
Barrett, Robert T. |
title |
The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
title_short |
The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
title_full |
The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
title_fullStr |
The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
title_full_unstemmed |
The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
title_sort |
stress hormone corticosterone in a marine top predator reflects short-term changes in food availability |
publisher |
Wiley |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/285914 https://doi.org/10.1002/ece3.1438 |
geographic |
Barents Sea Norway |
geographic_facet |
Barents Sea Norway |
genre |
Barents Sea Gadus morhua Uria aalge uria |
genre_facet |
Barents Sea Gadus morhua Uria aalge uria |
op_source |
1306-1317 5 Ecology and Evolution 6 |
op_relation |
Norges forskningsråd: 216547 Barrett, R.T., Erikstad, K.E., Sandvik, H., Myksvoll, M.S., Jenni-Eiermann, S., Kristensen, D.L., . Vikebø, F.B. (2015). The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability. Ecology and Evolution, 5(6), 1306-1317. doi: urn:issn:2045-7758 http://hdl.handle.net/11250/285914 https://doi.org/10.1002/ece3.1438 cristin:1229608 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ © 2015, The Author(s) |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.1438 |
container_title |
Ecology and Evolution |
container_volume |
5 |
container_issue |
6 |
container_start_page |
1306 |
op_container_end_page |
1317 |
_version_ |
1766370625867218944 |