- Title
- Seasonal metabolic adjustments in an avian evolutionary relict restricted to mountain habitat
- Creator
- Oswald, Krista N, Lee, Alan T K, Smit, Ben
- Subject
- To be catalogued
- Date
- 2021
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/441638
- Identifier
- vital:73903
- Identifier
- https://doi.org/10.1016/j.jtherbio.2020.102815
- Description
- For endotherms, maintaining body temperature during cold winters is energetically costly.Greater increase in winter maximum thermogenic capacity (Msum) has typically been correlated with improved cold tolerance. However, seasonal studies have shown equivocal direction change in basal metabolic rate (BMR) in winter, perhaps explained by latitude or phylogeny. We examined seasonal metabolic responses in the Cape rockjumper (Chaetops frenatus; “rockjumper”), a range-restricted mountain bird. We hypothesized that, given their mountain habitat preference, rockjumpers would be physiologically specialized for cooler air temperatures compared to other subtropical passerines. We measured body condition (using the ratio of Mb/tarsus), BMR, and Msum, in wild-living rockjumpers during winter and summer (n = 12 adults in winter –– 4 females, 8 males; n = 12 adults in summer –– 6 females, 6 males). We found birds had lesser BMR and thermal conductance, and greater Msum and body condition, in winter compared to summer. .
- Format
- 14 pages, pdf
- Language
- English
- Relation
- Journal of Thermal Biology, Oswald, K.N., Lee, A.T. and Smit, B., 2021. Seasonal metabolic adjustments in an avian evolutionary relict restricted to mountain habitat. Journal of Thermal Biology, 95, p.102815, Journal of Thermal Biology volume 95 number 1 1 14 2021 1879-0992
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
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Smit, Ben (Dr)
SDG 13. Climate Action
SDG 15. Life On Land
RU Department of Zoology and Entomology
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