| vi
| Dedication
|
| 1
| Abstract
|
| 4
| Preface
|
| 9
| Chapter 1: Introduction
|
| 10
| The zonotrichia
|
| 15
| Features of montane environments
|
| 16
| The study area
|
| 23
| Chapter 2: Migration arrival
|
| 24
| Arrival schedule
|
| 28
| Altitudinal movements
|
| 30
| Foraging
|
| 33
| Chapter 3: Social system snd behavior
|
| 34
| Territory establishment
|
| 34
| Pairing
|
| 35
| Between-year breeding dispersal
|
| 38
| Copulations
|
| 39
| Mate guarding
|
| 39
| Mate switching
|
| 40
| Mates per lifetime
|
| 40
| Age of mates
|
| 41
| Floaters
|
| 42
| Polygyny
|
| 43
| Aggression
|
| 45
| Vocalizations
|
| 51
| Chapter 4: Demography
|
| 52
| Life table
|
| 53
| Age structure of breeding population
|
| 57
| Chapter 5: Gonadal condition
|
| 58
| Gonadal changes
|
| 59
| Incubation (brood) patch
|
| 60
| Role of environmental cues in annual cycles
|
| 62
| Photoperiod effects
|
| 64
| Non-photoperiod effects
|
| 70
| Gonadal hormones
|
| 75
| Chapter 6: Body size and body condition
|
| 76
| Wing length and sex
|
| 77
| Wing length and age
|
| 78
| Seasonal changes in body mass
|
| 82
| Daily changes in body mass
|
| 87
| Chapter 7: Nests and eggs
|
| 88
| Nests
|
| 94
| Egg laying
|
| 96
| Description of eggs
|
| 96
| Egg dimensions
|
| 98
| Egg volume
|
| 106
| Weight loss of eggs during incubation
|
| 108
| Clutch size
|
| 113
| Incubation
|
| 121
| Chapter 8: Nestlings and fledglings
|
| 122
| Hatching
|
| 125
| Brood reduction
|
| 127
| Hatching asynchrony
|
| 131
| Sex ratio
|
| 131
| Cowbird parasitism
|
| 132
| Provisioning rates
|
| 133
| Nest sanitation
|
| 134
| Patterns of parental care
|
| 135
| Growth and thermoregulation in nestlings
|
| 144
| Natal dispersal
|
| 149
| Chapter 9: Nest failure
|
| 150
| Predation
|
| 152
| Desertion
|
| 153
| Storms
|
| 157
| Renesting
|
| 165
| Chapter 10: Reproductive success
|
| 166
| Annual reproductive success of nests
|
| 167
| Annual reproductive success of individuals
|
| 168
| Lifetime reproductive success
|
| 170
| Snow conditions
|
| 179
| Chapter 11: Late-season events
|
| 180
| Gonadal photorefractoriness
|
| 183
| Molt
|
| 192
| Timing of seasonal breeding
|
| 193
| Premigratory fattening
|
| 197
| Migration departure
|
| 198
| The stimulus for migration
|
| 199
| Stopover migrants and the migration schedule
|
| 205
| Chapter 12: Concluding remarks
|
| 209
| Acknowledgments
|
| 210
| Literature Cited
|
| Cover to Cover
|
