dc.contributor.author |
Moagi, Lesedi L.
|
|
dc.contributor.author |
Bourne, Amanda R.
|
|
dc.contributor.author |
Cunningham, Susan J.
|
|
dc.contributor.author |
Jansen, Raymond
|
|
dc.contributor.author |
Ngcamphalala, Celiwe Angel
|
|
dc.contributor.author |
Ganswindt, Andre
|
|
dc.contributor.author |
Ridley, Amanda R.
|
|
dc.contributor.author |
McKechnie, Andrew E.
|
|
dc.date.accessioned |
2022-04-28T08:04:44Z |
|
dc.date.issued |
2021-05 |
|
dc.description.abstract |
Relatively little effort has been directed towards elucidating the role of
physiological stress pathways in mediating avian responses to global
heating. For free-ranging southern pied babblers, Turdoides bicolor,
daily maximum air temperatures (Tmax) between ∼35 and ∼40°C
result in reduced foraging efficiency, loss of body mass and
compromised breeding success. We tested the hypothesis that very
hot days are experienced as stressors by quantifying relationships
between Tmax and faecal glucocorticoid metabolite (fGCM) levels in
naturally excreted droppings. On days when Tmax<38°C, fGCM levels
were independent of Tmax (mean±s.d. 140.25±56.92 ng g−1 dry
mass). At Tmax>38°C, however, fGCM levels increased linearly with
Tmax and averaged 190.79±70.13 ng g−1 dry mass. The effects of
Tmax on fGCM levels did not carry over to the following morning,
suggesting that very hot days are experienced as acute stressors. |
en_US |
dc.description.department |
Mammal Research Institute |
en_US |
dc.description.department |
Zoology and Entomology |
en_US |
dc.description.embargo |
2022-05-15 |
|
dc.description.librarian |
am2022 |
en_US |
dc.description.sponsorship |
The DSI-NRF Centre of Excellence at the FitzPatrick Institute for African Ornithology, the University of Cape Town, the Ernest Oppenheimer Memorial Trust, the British Ornithologists’ Union, the Australian Research Council and the National Research Foundation of South Africa. |
en_US |
dc.description.uri |
http://jeb.biologists.org |
en_US |
dc.identifier.citation |
Moagi, L.L., Bourne, A.R., Cunningham, S.J. et al. Hot days are associated with short-term adrenocortical responses in a southern African arid-zone passerine bird', Journal of Experimental Biology, vol. 224, pp. 1-6. |
en_US |
dc.identifier.issn |
0022-0949 (print) |
|
dc.identifier.issn |
1477-9145 (online) |
|
dc.identifier.other |
10.1242/jeb.242535 |
|
dc.identifier.uri |
https://repository.up.ac.za/handle/2263/84929 |
|
dc.language.iso |
en |
en_US |
dc.publisher |
Company of Biologists |
en_US |
dc.rights |
© 2021. Published by The Company of Biologists Ltd. |
en_US |
dc.subject |
Air temperature |
en_US |
dc.subject |
Desert |
en_US |
dc.subject |
Faecal glucocorticoid metabolites |
en_US |
dc.subject |
Fitness costs |
en_US |
dc.subject |
Heat stress |
en_US |
dc.title |
Hot days are associated with short-term adrenocortical responses in a southern African arid-zone passerine bird |
en_US |
dc.type |
Article |
en_US |