Fig. 1

Fecal progestagen profiles. Fecal progestagen (ng/g) profiles from captive female moose (n = 12) from August 23rd to October 15th, 2021, at the Kenai Moose Research Center, AK, USA. The bold outlined graphs indicate the seven individuals with fecal progestagen profiles which fulfill the criteria to determine a date for the onset of luteal activity (OLA). The remaining five graphs are for moose with fecal progestagen profiles which did not fulfill the criteria to determine a date for OLA or did not have vaginal temperature data for the whole duration of the study period (moose 30680) and was, therefore, excluded from further data analysis. Dashed red horizontal line = individual progestagen threshold. Dashed blue vertical line = date for OLA