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Studies in Avian Biology - Number 5

Annual Variation of Daily Energy Expenditure by the Black-billed Magpie: A Study of Thermal and Behavorial Energetics

John N. Mugaas and James R. King


vi List of symbols
1 Introduction
2 Population and study area
3 Rationale and methods of thermal analysis
5 Nonmeteorological Variables
6 Meteorological Variables
7 Rationale and methods of time-activity and energy budget analysis
7 Behavioral Categories
8 Methods of Observation
9 Energy Equivalents
14 Calculation of Daily Energy Expenditure
14 Statistical Treatment
15 The thermal environment and its influence on the biology of the magpie
15 Meteorological Measurements and the Microclimatic Set
18 Calculation of Equivalent Blackbody Temperature and Its Variability
22 Annual Cycle of Equivalent Blackbody Temperature in Specific Thermal Environments
27 Time-activity and energy budgeting in the annual cycle
27 Chronology of Events in the Annual Cycle
31 Daily Time-Activity Budget
33 Metabolic Cost of Activity
37 Total Daily Energy Expenditure
40 Discussion
41 Thermal Tolerance and Geographic Distribution
42 The Bout as an Index of Behavior
45 Annual Cycle of Energy Expenditure
58 Minimizing HTD Through Adaptive Use of Time and Energy
59 Comparisons of Time Budgets of Black-billed and Yellow-billed Magpies
60 Comparisons of Daily Energy Expenditure for Several Species
67 Summary
69 Acknowledgments
69 Literature cited
76 Appendix
Cover to Cover


A publication of the Cooper Ornithological Society
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