Table 1. Estimates from linear mixed-effects models (LME) for the model with lowest AIC relating calf body mass in autumn and reproductive success to population density (log[Number of females]), spring onset (SO) and peak plant productivity.

	Body mass		Reproductive success
	β	95% CL	β	95% CL
Intercept	19.0	18.4, 19.6	0.74	0.696, 0.782
Population density	−1.22	−1.44, −1.00	−0.05	−0.068, −0.031
Spring onset (SO)	−0.10	−0.12, −0.09	−0.008	−0.009, −0.007
Peak plant productivity	26.3	20.3, 32.2	3.76	3.279, 4.234
Random effects:
Among populations std	1.22	0.875, 1.72	0.089	0.062, 0.128
Among herding units std	0.72	0.55, 0.93	0.060	0.048, 0.075
Within herding units (residuals)	1.65	1.58, 1.73	0.139	0.134, 0.146