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Biography Fields Definition
- Study/Species: the unique identifier of each study population, representing different species in the database.
- AnimID: the ID of each animal (typically an abbreviated code) to unambiguously identify individuals within a study. Animals in different studies might share an AnimID (for instance, study 2 and study 5 both have an animal with AnimID = 'AFR').
- BirthGroup and BGQual: the social group into which an animal was born (BirthGroup) and the researcher's confidence in this assignment (BGQual).
- Sex: sex of each individual, possible values include:
- M: Male
- F: Female
- U: unknown
- MomID: the AnimID of an individual's mother.
- FirstBorn: whether individuals were known to be their motherŐs first offspring.
- Birthdate, BDMin, BDMax: Birth dates, and estimates of the range of possible dates in which the birth could have occurred (BDMin and BDMax).
- BDDist: distribution of birth date estimates to increase precision. More information can be found in the methid paper.
- N: Normal. the most likely birthdate to be closer to Birthdate than to BDMin or BDMax
- U: Uniform. any birthdate between BDMin and BDMax (including Birthdate) was equally likely.
- Entrydate and Entrytype: the date and type at which individuals entered their respective study populations. Possible Entrytypes include:
- B: birth
- I: immigration
- C: start of confirmed AnimID
- Q: initiation of close observation
- Departdate and DepartdateError: the last date on which an animal was observed in the study population is the Departdate. DepartdateError reflects the time between Departdate (last date observed) and the first time that an animal was confirmed missing (e.g., when observations resumed and all individuals present could be expected to be re-encountered). DepartdateError was expressed as a fraction of a year (number of days divided by number of days in a year), and was >0 whenever the number of days between Departdate and retrospective confirmed missing date was >15 days. In some studies, members of the study population did not live in cohesive groups, making it difficult to specify an expected lag to re-sighting and a corresponding DepartdateError. In cases when DepartdateError could not be calculated, its value was missing.
- DepartType: the type of departure of an individual from the population, including:
- D: death
- E: emigration
- P: permanent disappearance
- O: the end of observation, which means that the individual was still present at the most recent census date.



