Cycling temperature treatments affect estimates of digestive performance in prairie lizards (Sceloporus consobrinus) (2024)

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Volume 227, Issue 4

February 2024

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RESEARCH ARTICLE| 21 February 2024

In collection: Ecophysiology: responses to environmental stressors and change

Allison R. Litmer

,

Allison R. Litmer *

University of Arkansas

,

Department of Biological Sciences, 650 W. Dickson Street, Fayetteville, AR 72701

,

USA

Author for correspondence (arlitmer@owu.edu)

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Steven J. Beaupre

Steven J. Beaupre

University of Arkansas

,

Department of Biological Sciences, 650 W. Dickson Street, Fayetteville, AR 72701

,

USA

Search for other works by this author on:

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Author and article information

University of Arkansas

,

Department of Biological Sciences, 650 W. Dickson Street, Fayetteville, AR 72701

,

USA

Steven J. Beaupre

University of Arkansas

,

Department of Biological Sciences, 650 W. Dickson Street, Fayetteville, AR 72701

,

USA

*

Present address: Ohio Wesleyan University, Department of Biological Sciences, 61 N. Sandusky Street, Delaware, OH 43015, USA.

Author for correspondence (arlitmer@owu.edu)

Competing interests

The authors declare no competing or financial interests.

Received: 08 Nov 2023

Accepted: 22 Jan 2024

Online ISSN: 1477-9145

Print ISSN: 0022-0949

Funding

Funding Group:

  • Award Group:

    • Funder(s):

      Sigma Xi

Funding Group:

  • Award Group:

    • Funder(s):

      University of Arkansas

Funding Group:

  • Award Group:

    • Funder(s):

      National Science Foundation BRC-BIO

    • Award Id(s):

      2217826

© 2024. Published by The Company of Biologists Ltd

2024

J Exp Biol (2024) 227 (4): jeb247006.

Article history

Received:

08 Nov 2023

Accepted:

22 Jan 2024

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Citation

Allison R. Litmer, Steven J. Beaupre; Cycling temperature treatments affect estimates of digestive performance in prairie lizards (Sceloporus consobrinus). J Exp Biol 15 February 2024; 227 (4): jeb247006. doi: https://doi.org/10.1242/jeb.247006

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ABSTRACT

In nature, many organisms experience a daily range of body temperatures. Thermal performance at stable temperatures is often extrapolated to predict function in cyclical environments. However, temperature order and cyclicity may influence physiological processes. The current study compared energy intake, digestive passage time and energy budgets at a stable temperature (33°C) and two temperature cycles in lizards (Sceloporus consobrinus), to determine (1) whether stable treatments adequately project performance in a cycling environment and (2) whether temperature order influences performance. Cycles had a mean temperature of 33°C, and rotated through 30°C, 33°C and 36°C daily, with equal durations of time at each temperature but differing temperature order, with warm days and cool nights in cycle 1 and cool days and warm nights in cycle 2. For analyses, performance in the stable treatment was compared with that during cycles. If temperature is the primary factor regulating performance, then performance from the stable treatment and cycles should compare favorably. However, physiological performance varied based on temperature treatment. Energy intake and budgets were similar between the stable trial and cycle 1 but not cycle 2. However, passage time did not differ. Notably, the two cycling regimes consistently varied in performance, indicating that temperature order plays a primary role in regulating performance. Physiological data collection requires careful consideration of effects of cycling versus stable temperature treatments. Stable temperatures do not consistently represent performance in cycling regimes and consideration should be paid not only to which temperatures animals experience but also to how temperature is experienced in nature.

Keywords:

Lizard, Energetics, Thermal performance, Constant, Passage, Consumption

© 2024. Published by The Company of Biologists Ltd

2024

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