Replication Data for: Figs 17.2, 17.3, and 17.4, BTPDs, Length of gestation and lactation, 18 June 2026

I created this file from SYSTAT file called PREGLAC, which I created on 16 Oct 1989 I assume that I checked this file TWO TIMES AT CREATION I used this file for Hoogland 1995 (e.g., pages 389, 392) Note that data begin in 1978 = first year when I could identify copulations and parturition Note this this file contains data from Litter size = 0 I deleted all cases of Litter size = 0 for statistical analyses with litter size vs gestation or lactation No eartag information in this file.

Litter size = litter size at first juvenile emergence = number of weanlings Yearling = number of babies from litter that survive for >=9 months after first emergence Date of estrus and copulation = JULIAN date when female copulated Date of parturition = JULIAN date of parturition Date of weaning = JULIAN date of first juvenile emergence = approximate weaning Length of gestation (days) = Date of Parturition - Date of estrus and copulation Length of lactation = number of days between date of parturition and date of weaning = date of weaning - date of parturition Length of both gestation and lactation = summation of length of gestation and length of lactation I ASSUME that date of weaning = date of first juvenile emergence from the natal burrow entrance, but I know this is not completely true--because nursing of juveniles continues to occur after first juvenile emergences.