Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds

Kyle H. Elliott*, Jorg Welcker, Anthony J. Gaston, Scott A. Hatch, Vince Palace, James F. Hare, John R. Speakman, W. Gary Anderson

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)580-586
Number of pages7
JournalOpen Biology
Volume2
Issue number6
Early online date15 Jun 2013
DOIs
Publication statusPublished - Jun 2013

Fingerprint

Basal Metabolism
resting metabolic rate
thyroid hormones
Thyroid Hormones
seabirds
energy expenditure
Energy Metabolism
triiodothyronine
L-thyroxine
basal metabolic rate
Metabolism
Thyroxine
Rissa
metabolism
Birds
Triiodothyronine
thyroxine
Proxy
rearing
chicks

Keywords

  • Daily energy expenditure
  • Resting metabolic rate
  • Thyroxine
  • Triiodothyronine

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Elliott, K. H., Welcker, J., Gaston, A. J., Hatch, S. A., Palace, V., Hare, J. F., ... Anderson, W. G. (2013). Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds. Open Biology, 2(6), 580-586. https://doi.org/10.1242/bio.20134358

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.

In: Open Biology, Vol. 2, No. 6, 06.2013, p. 580-586.

Research output: Contribution to journalArticle

Elliott, KH, Welcker, J, Gaston, AJ, Hatch, SA, Palace, V, Hare, JF, Speakman, JR & Anderson, WG 2013, 'Thyroid hormones correlate with resting metabolic rate, not daily energy expenditure, in two charadriiform seabirds', Open Biology, vol. 2, no. 6, pp. 580-586. https://doi.org/10.1242/bio.20134358
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. In: Open Biology. 2013 ; Vol. 2, No. 6. pp. 580-586.
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