Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds
Thyroid hormones affect in vitro metabolic intensity, increase basal metabolic rate (BMR) in the lab, and are sometimes correlated with basal and/or resting metabolic rate (RMR) in a field environment. Given the difficulty of measuring metabolic rate in the field—and the likelihood that capture and...
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fthighwire:oai:open-archive.highwire.org:biolopen:bio.20134358v1 2023-05-15T15:44:57+02:00 Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds Elliott, Kyle H. Welcker, Jorg Gaston, Anthony J. Hatch, Scott A. Palace, Vince Hare, James F. Speakman, John R. Anderson, W. Gary 2013-05-03 01:33:57.0 text/html http://bio.biologists.org/cgi/content/short/bio.20134358v1 https://doi.org/10.1242/bio.20134358 en eng Company of Biologists http://bio.biologists.org/cgi/content/short/bio.20134358v1 http://dx.doi.org/10.1242/bio.20134358 Copyright (C) 2013, Company of Biologists Research Article TEXT 2013 fthighwire https://doi.org/10.1242/bio.20134358 2015-02-28T22:50:35Z Thyroid hormones affect in vitro metabolic intensity, increase basal metabolic rate (BMR) in the lab, and are sometimes correlated with basal and/or resting metabolic rate (RMR) in a field environment. Given the difficulty of measuring metabolic rate in the field—and the likelihood that capture and long-term restraint necessary to measure metabolic rate in the field jeopardizes other measurements—we examined the possibility that circulating thyroid hormone levels were correlated with RMR in two free-ranging bird species with high levels of energy expenditure (the black-legged kittiwake, Rissa tridactyla , and thick-billed murre, Uria lomvia ). Because BMR and daily energy expenditure (DEE) are purported to be linked, we also tested for a correlation between thyroid hormones and DEE. We examined the relationships between free and bound levels of the thyroid hormones thyroxine (T4) and triiodothyronine (T3) with DEE and with 4-hour long measurements of post-absorptive and thermoneutral resting metabolism (resting metabolic rate; RMR). RMR but not DEE increased with T3 in both species; both metabolic rates were independent of T4. T3 and T4 were not correlated with one another. DEE correlated with body mass in kittiwakes but not in murres, presumably owing to the larger coefficient of variation in body mass during chick rearing for the more sexually dimorphic kittiwakes. We suggest T3 provides a good proxy for resting metabolism but not DEE in these seabird species. Text Black-legged Kittiwake rissa tridactyla thick-billed murre Uria lomvia uria HighWire Press (Stanford University) Dee ENVELOPE(-59.767,-59.767,-62.433,-62.433) Biology Open 2 6 580 586 |
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Research Article Elliott, Kyle H. Welcker, Jorg Gaston, Anthony J. Hatch, Scott A. Palace, Vince Hare, James F. Speakman, John R. Anderson, W. Gary Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
topic_facet |
Research Article |
description |
Thyroid hormones affect in vitro metabolic intensity, increase basal metabolic rate (BMR) in the lab, and are sometimes correlated with basal and/or resting metabolic rate (RMR) in a field environment. Given the difficulty of measuring metabolic rate in the field—and the likelihood that capture and long-term restraint necessary to measure metabolic rate in the field jeopardizes other measurements—we examined the possibility that circulating thyroid hormone levels were correlated with RMR in two free-ranging bird species with high levels of energy expenditure (the black-legged kittiwake, Rissa tridactyla , and thick-billed murre, Uria lomvia ). Because BMR and daily energy expenditure (DEE) are purported to be linked, we also tested for a correlation between thyroid hormones and DEE. We examined the relationships between free and bound levels of the thyroid hormones thyroxine (T4) and triiodothyronine (T3) with DEE and with 4-hour long measurements of post-absorptive and thermoneutral resting metabolism (resting metabolic rate; RMR). RMR but not DEE increased with T3 in both species; both metabolic rates were independent of T4. T3 and T4 were not correlated with one another. DEE correlated with body mass in kittiwakes but not in murres, presumably owing to the larger coefficient of variation in body mass during chick rearing for the more sexually dimorphic kittiwakes. We suggest T3 provides a good proxy for resting metabolism but not DEE in these seabird species. |
format |
Text |
author |
Elliott, Kyle H. Welcker, Jorg Gaston, Anthony J. Hatch, Scott A. Palace, Vince Hare, James F. Speakman, John R. Anderson, W. Gary |
author_facet |
Elliott, Kyle H. Welcker, Jorg Gaston, Anthony J. Hatch, Scott A. Palace, Vince Hare, James F. Speakman, John R. Anderson, W. Gary |
author_sort |
Elliott, Kyle H. |
title |
Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
title_short |
Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
title_full |
Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
title_fullStr |
Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
title_full_unstemmed |
Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
title_sort |
thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds |
publisher |
Company of Biologists |
publishDate |
2013 |
url |
http://bio.biologists.org/cgi/content/short/bio.20134358v1 https://doi.org/10.1242/bio.20134358 |
long_lat |
ENVELOPE(-59.767,-59.767,-62.433,-62.433) |
geographic |
Dee |
geographic_facet |
Dee |
genre |
Black-legged Kittiwake rissa tridactyla thick-billed murre Uria lomvia uria |
genre_facet |
Black-legged Kittiwake rissa tridactyla thick-billed murre Uria lomvia uria |
op_relation |
http://bio.biologists.org/cgi/content/short/bio.20134358v1 http://dx.doi.org/10.1242/bio.20134358 |
op_rights |
Copyright (C) 2013, Company of Biologists |
op_doi |
https://doi.org/10.1242/bio.20134358 |
container_title |
Biology Open |
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2 |
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6 |
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580 |
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586 |
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1766379315731103744 |