Replication data for Figs 15.2 and 15.3, WTPDs, Julian dates for copulation, parturition, and first juvenile emergences, 13 May 2026

These Julian data are for NON-LEAP years. Julian dates for leap years after 28 February differ by 1 day. Date of copulation is obvious.

Date of first emergence of juveniles = approximate date of weaning (see text) = date when juveniles first appeared aboveground at natal burrow-entrance. Date of parturition = date when mother gave birth underground. Date of parturition is usually +- one day (see text of Chapter 15).

Litter size at first juvenile emergence = date when juveniles first appear appeared aboveground at natal nursery-burrow. All data on same line are from THE SAME single litter/mother in the same year For some litters, I have data for all four variables. For others, I have data for only 1 or 2 variables.

Fig 15.3 shows means + one Standard Error (SEM) Standard errors were usually small, because my sample sizes for each age were large. In some cases for Fig 15.3 for WTPDs, I have shown SEM = 1.6 to show small SEMs that extend slightly beyond the circles— because showing slightly inflated SEMs is better than suggesting no variation at all, in my opinion. These data used for Figures 15.2 and 15.3 in Hoogland 2026.

This file ready for longterm storage on 12 March 2025. I considered data from the same female in different years to be independent. No eartags in this file.

WTPD female ID is case number for each WTPD female per year. I will use 2010 data from this WTPD file to plot (a) date of copulation vs date vs parturition and (b) date of copulation vs date of first emergence of juveniles as evidence that copulatory partners from underground consortships were accurate. See Figs 15.16 and 15.17 for this evidence.

All WTPD data in this EXCEL from the single WTPD study-colony at the Arapaho National Wildlife Refuge near Walden, Colorado File name = Figs 15.2 and 15.3, WTPDs, Julian dates for copulation, parturition, and first juvenile emergences, 13 May 2026