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Title: Aestivation in Mammals and Birds
Contributor(s): Geiser, Fritz (author)orcid 
Publication Date: 2010
DOI: 10.1007/978-3-642-02421-4_5
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Abstract: Aestivation, which in the context of this paper refers to avian and mammalian torpor in summer/at high ambient temperatures (T a), does not appear to differ functionally from other forms of torpor, and to a large extent reflects the higher body temperatures (T b) caused by high T a. However, from an ecological point of view, aestivation results in different challenges and requirements than does torpor use in winter, because heat can cause reduced food and water availability in many regions, but without the access to low T a for a substantial reduction of T b. Aestivation is used by a diversity of adult mammals and birds both in the field and laboratory, as well as by growing young to reduce thermoregulatory energy expenditure. Torpor occurs at high T a including the thermo-neutral zone and even under these conditions the reduction in energy expenditure and water requirements or water loss is substantial. Although data from the laboratory and, especially, from the field are limited, they show that torpor at high T a is an effective survival strategy and suggest that it is employed by many mammals and birds in a diversity of habitats.
Publication Type: Book Chapter
Source of Publication: Aestivation, p. 95-111
Publisher: Springer
Place of Publication: Heidelberg, Germany
ISBN: 9783642024207
Field of Research (FOR): 060806 Animal Physiological Ecology
HERDC Category Description: B1 Chapter in a Scholarly Book
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Series Name: Progress in Molecular and Subcellular Biology
Series Number : 49
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Appears in Collections:Book Chapter
School of Environmental and Rural Science

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