Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria.

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
Katharina RuthsatzJulian Glos

Abstract

Environmental stress induced by natural and anthropogenic processes including climate change may threaten the productivity of species and persistence of populations. Ectotherms can potentially cope with stressful conditions such as extremes in temperature by exhibiting physiological plasticity. Amphibian larvae experiencing stressful environments display altered thyroid hormone (TH) status with potential implications for physiological traits and acclimation capacity. We investigated how developmental temperature (Tdev) and altered TH levels (simulating proximate effects of environmental stress) influence the standard metabolic rate (SMR), body condition (BC), and thermal tolerance in metamorphic and post-metamorphic anuran larvae of the common frog (Rana temporaria) reared at five constant temperatures (14-28 °C). At metamorphosis, larvae that developed at higher temperatures had higher maximum thermal limits but narrower ranges in thermal tolerance. Mean CTmax was 37.63 °C ± 0.14 (low TH), 36.49 °C ± 0.31 (control), and 36.43 °C ± 0.68 (high TH) in larvae acclimated to different temperatures. Larvae were able to acclimate to higher Tdev by adjusting their thermal tolerance, but not their SMR, and this effect was not impaired b...Continue Reading

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Citations

Sep 25, 2020·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Brooke L BodensteinerEric J Gangloff
Apr 6, 2021·Frontiers in Endocrinology·Renata Marino RomanoMarco Aurelio Romano
Sep 19, 2021·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Tijana B RadovanovićMarko D Prokić

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Methods Mentioned

BETA
environmental stress

Software Mentioned

R Development Core Team
R
glmmPQL
MASS
Adobe Illustrator
ggplot2

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