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

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. See chapter 18 for details.

Note

Entries with question marks are IGNORED by SYSTAT. I did a little trial to verify this. Dates shown here are Julian dates.

Julian date of copulation = 71 = 12 March, for example. Julian date of first emergence of juveniles from natal burrow entrance = 145 = 25 May, for example. Julian date of parturition = 84 = March 25, for example.

These Julian data are for NON-LEAP years. Julian dates for leap years after 28 February differ by 1 day. All lengths are in DAYS No information on female IDs in this file-- no eartags, no Nyanzol markers Each line is information from a single UPD female per year.

These data used for Figs 17.2, 17.3, and 17.4 in Hoogland 2026. This file ready for longterm storage on 25 March 2025. I considered data from the same prairie dog in different years to be independent.

Note

Regressions with Litter size vs Length of gestation and Litter size vs Length of lactation do NOT include litter size = 0. Litter size = 0 is EXCLUDED for these latter analyses in Fig 17.4. Also excluded for these analyses if littsize = 99 = litter weaned, but litter size not determined because of inter-litter mixing of juveniles shortly before or after first emergences This EXCEL file contains copious information that does not all appear in Figs 17.2, 17.3, and 17.4 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 i.e., data when Litter size = 0 were EXCLUDED for statistical analyses in Fig 17.4.

File name = Figs 17.2, 17.3, 17.4, UPDs, Lengths of gestation and lactation, 18 June 2026