Table 2 Name and description of variables included in uni-variable and multi-variable multi-level logistic regression models
Variable name | Description |
|---|---|
Bird ID | Unique ID number for each bird in the population |
Clutch ID | Unique ID number for the clutch |
Pair ID | Unique ID number for the parent pair |
Year | Breeding year |
Breeding Location | Breeding site (Carden or Dyer’s Bay) |
Cage Type | Whether the cage had 2 or 3 sections |
Female breeding age | Age of female parent (years) |
Male breeding age | Age of male parent (years) |
Female birth year | Year the female parent was born |
Male birth year | Year the male parent was born |
Female breeding outcome | The breeding outcome of the female parent in the previous year (second clutch, first clutch, failed to breed, eggs hatched but no fledglings, or unpaired) |
Clutch number | First or second clutch |
Number of fledglings | Number of young that fledged from a unique brood |
Survival | Whether or not the individual fledgling survived to be released or retained in the captive population |