Figure 2
Percentage of cyclic mares. The 3 groups were maintained under natural photoperiodic conditions and fed with 3 different diets. The WF and R groups received a diet supplying approximately 100% and 50% of energy requirements for maintenance, respectively. The V group was fed in order to mimic variations of energy availability in natural grasslands, but about 4-5 months in advance of phase relative to the beginning of natural availability of grass in pastures.