Data from: 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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ftdryad:oai:v1.datadryad.org:10255/dryad.79977 2023-05-15T15:38:50+02:00 Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability Barrett, Robert T. Erikstad, Kjell Einar Sandvik, Hanno Myksvoll, Mari S. Jenni-Eiermann, Susi Kristensen, Ditte L. Moum, Truls Reiertsen, Tone K. Vikebø, Frode Hornøya Barents Sea Norway 70.37N 31.15E 2015-03-13T20:25:08Z http://hdl.handle.net/10255/dryad.79977 https://doi.org/10.5061/dryad.cb5h8 unknown doi:10.5061/dryad.cb5h8/1 doi:10.5061/dryad.cb5h8/2 doi:10.1002/ece3.1438 PMID:25859335 doi:10.5061/dryad.cb5h8 Barrett RT, Erikstad KE, Sandvik H, Myksvoll MS, Jenni-Eiermann S, Kristensen DL, Moum T, Reiertsen TK, Vikebø F (2015) The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability. Ecology and Evolution 5(6): 1306–1317. http://hdl.handle.net/10255/dryad.79977 corticosterone CORT food availability prey abundance larval drift model Article 2015 ftdryad https://doi.org/10.5061/dryad.cb5h8 https://doi.org/10.5061/dryad.cb5h8/1 https://doi.org/10.5061/dryad.cb5h8/2 https://doi.org/10.1002/ece3.1438 2020-01-01T15:16:16Z 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 Dryad Digital Repository (Duke University) Barents Sea Hornøya ENVELOPE(31.154,31.154,70.388,70.388) Norway |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
corticosterone CORT food availability prey abundance larval drift model |
spellingShingle |
corticosterone CORT food availability prey abundance larval drift model Barrett, Robert T. Erikstad, Kjell Einar Sandvik, Hanno Myksvoll, Mari S. Jenni-Eiermann, Susi Kristensen, Ditte L. Moum, Truls Reiertsen, Tone K. Vikebø, Frode Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
topic_facet |
corticosterone CORT food availability prey abundance larval drift model |
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 Einar Sandvik, Hanno Myksvoll, Mari S. Jenni-Eiermann, Susi Kristensen, Ditte L. Moum, Truls Reiertsen, Tone K. Vikebø, Frode |
author_facet |
Barrett, Robert T. Erikstad, Kjell Einar Sandvik, Hanno Myksvoll, Mari S. Jenni-Eiermann, Susi Kristensen, Ditte L. Moum, Truls Reiertsen, Tone K. Vikebø, Frode |
author_sort |
Barrett, Robert T. |
title |
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
title_short |
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
title_full |
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
title_fullStr |
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
title_full_unstemmed |
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
title_sort |
data from: the stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability |
publishDate |
2015 |
url |
http://hdl.handle.net/10255/dryad.79977 https://doi.org/10.5061/dryad.cb5h8 |
op_coverage |
Hornøya Barents Sea Norway 70.37N 31.15E |
long_lat |
ENVELOPE(31.154,31.154,70.388,70.388) |
geographic |
Barents Sea Hornøya Norway |
geographic_facet |
Barents Sea Hornøya Norway |
genre |
Barents Sea Gadus morhua Uria aalge uria |
genre_facet |
Barents Sea Gadus morhua Uria aalge uria |
op_relation |
doi:10.5061/dryad.cb5h8/1 doi:10.5061/dryad.cb5h8/2 doi:10.1002/ece3.1438 PMID:25859335 doi:10.5061/dryad.cb5h8 Barrett RT, Erikstad KE, Sandvik H, Myksvoll MS, Jenni-Eiermann S, Kristensen DL, Moum T, Reiertsen TK, Vikebø F (2015) The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availability. Ecology and Evolution 5(6): 1306–1317. http://hdl.handle.net/10255/dryad.79977 |
op_doi |
https://doi.org/10.5061/dryad.cb5h8 https://doi.org/10.5061/dryad.cb5h8/1 https://doi.org/10.5061/dryad.cb5h8/2 https://doi.org/10.1002/ece3.1438 |
_version_ |
1766370205656678400 |