This data set corresponds to live-captured polar bears from late March 1992 to beginning of May
2017 at Svalbard, Norway.
Usage
data(polar)
Arguments
Format
A data frame with 231 rows and 7 columns.
year
Catch year
days
Number of the day of the catch year
id
Unique specimen id
age
Age of the specimen, estimated using premolar tooth
agecat
Categorized age of the specimen
length
Body straight length (cm)
cubnumber
Litter size
References
Folio D. M., Aars J., Gimenez O., Derocher A. E., Wiig O. and Cubaynes S. (2019)
How many cubs can a mum nurse? Maternal age and size influence litter size in
polar bears, Biology letters, 15.