Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus

Oswald, Krista N; Lee, Alan T K; Smit, Ben

Title: Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus
Creator: Oswald, Krista N
Creator: Lee, Alan T K
Creator: Smit, Ben
Subject: To be catalogued
Date Issued: 2018
Date: 2018
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/448398
Identifier: vital:74727
Identifier: https://doi.org/10.2989/00306525.2018.1509905
Description: Concerns about climate change have led to an increase in studies on physiological mechanisms birds possess to cope with increasing temperatures. For range-restricted species such as Cape Rockjumpers Chaetops frenatus, whose population declines are correlated with habitat warming, we identified juvenile physiological responses to high temperature as a potential gap in current knowledge. We compared metabolic rate, evaporative water loss, evaporative cooling efficiency (calculated from evaporative water loss and resting metabolic rate) and body temperature in juveniles (n = 5) with adult birds (n = 10) to a ramped temperature profile (30–42 °C). Although juveniles exhibited no significant difference in cooling efficiency, they had higher evaporative water loss, resting metabolic rate and body temperature. This suggests that while juvenile birds show similar abilities to dissipate metabolic heat evaporatively, they face higher overall water and energy demands, and thus higher thermoregulatory costs in maintaining body temperature as overall temperatures continue to increase.
Format: 6 pages
Format: pdf
Language: English
Relation: Ostrich
Relation: Oswald, K.N., Lee, A.T. and Smit, B., 2018. Comparison of physiological responses to high temperatures in juvenile and adult Cape Rockjumpers Chaetops frenatus. Ostrich, 89(4), pp.377-382
Relation: Ostrich volume 89 number 4 377 382 2018 1727-947X
Rights: Publisher
Rights: Use of this resource is governed by the terms and conditions of the Taylor and Francis Online Terms and Conditions Statement (https://www.tandfonline.com/terms-and-conditions)

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Smit, Ben (Dr)

SDG 15. Life On Land

RU Department of Zoology and Entomology

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