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The Quintessential NaturalistHonoring the Life and Legacy of Oliver P. Pearson$
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Douglas Kelt and Deborah Kaspin

Print publication date: 2007

Print ISBN-13: 9780520098596

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520098596.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 01 July 2022

The Evolution of Energetics in Birds and Mammals

The Evolution of Energetics in Birds and Mammals

La Evoluión De La EnergÉtica En Aves MamÍferos

(p.67) The Evolution of Energetics in Birds and Mammals
The Quintessential Naturalist

Brian K. McNab

University of California Press

This chapter provides a far-ranging review of the evolution of energetics in both birds and mammals. It notes that energetics effectively integrates diverse aspects of the natural history of an organism with conditions in the environment. The chapter explains that this integration is most evident in endotherms as a result of their high cost of maintenance and the limited quantities and qualities of resources in most environments. It emphasizes that endotherms which show the greatest ecological and behavioral diversity have the largest diversity in energetics. The chapter notes that basal energy expenditures in endotherms are correlated principally with body mass, but also with body composition and its relation to activity level, food habits, climate and its surrogates latitude and altitude, as well as life with restrictive habits or in restrictive environments.

Keywords:   evolution, energetics, birds and mammals, organism, endotherms, behavioral diversity, basal energy expenditures, body mass, surrogates

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