Patterns of activity and body temperature of Aldabra giant tortoises in relation to environmental temperature

Ecology and Evolution
Wilfredo FalcónDennis M Hansen

Abstract

We studied the temperature relations of wild and zoo Aldabra giant tortoises (Aldabrachelys gigantea) focusing on (1) the relationship between environmental temperature and tortoise activity patterns (n = 8 wild individuals) and (2) on tortoise body temperature fluctuations, including how their core and external body temperatures vary in relation to different environmental temperature ranges (seasons; n = 4 wild and n = 5 zoo individuals). In addition, we surveyed the literature to review the effect of body mass on core body temperature range in relation to environmental temperature in the Testudinidae. Diurnal activity of tortoises was bimodally distributed and influenced by environmental temperature and season. The mean air temperature at which activity is maximized was 27.9°C, with a range of 25.8-31.7°C. Furthermore, air temperature explained changes in the core body temperature better than did mass, and only during the coldest trial, did tortoises with higher mass show more stable temperatures. Our results, together with the overall Testudinidae overview, suggest that, once variation in environmental temperature has been taken into account, there is little effect of mass on the temperature stability of tortoises. Moreover,...Continue Reading

References

Jan 1, 1976·Comparative Biochemistry and Physiology. A, Comparative Physiology·B K McNab, W Auffenberg
May 1, 1982·JPEN. Journal of Parenteral and Enteral Nutrition·C L MorinN Lapointe
Sep 1, 1995·Journal of Biological Rhythms·G Tosini, M Menaker
Jul 16, 1999·Proceedings. Biological Sciences·D BournS I Hay
Jan 28, 2005·Physiological and Biochemical Zoology : PBZ·Gordon C GriggMichael L Augee
Nov 18, 1966·Science·K Schmidt-Nielse, P J Bentley
May 23, 2015·Proceedings. Biological Sciences·Alex R Gunderson, Jonathon H Stillman
Apr 14, 2016·Ecology and Evolution·Lindsay A TurnbullNancy Bunbury

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Citations

Oct 24, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Wilfredo Falcón, Dennis M Hansen
Oct 15, 2019·Biological Reviews of the Cambridge Philosophical Society·Wilfredo FalcónDennis M Hansen

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Software Mentioned

ggplot2
lme4
WebPlotDigitizer
R package “ ggplot2 ”
lmerTest
R package “ psych
R

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