Effect of environmental factors and changes in the body condition score on the onset of the breeding season in mares.

摘要: Several methods have been proposed to advance the onset of breeding season in horses. Most them are based on exposure an artificial lighting period combined with hormonal treatments. Mares exposed photoperiod most often housed indoors where ambient temperature is higher than outside temperature. held barns also different daylight intensities horses kept outside, depending architecture. In current study, we evaluated impact temperature, intensity and changes body condition score (BCS) timing first ovulation after winter anestrus mares photoperiod. (n = 211) were but same (except for a natural control group). Artificial as well increase BCS over significantly advanced spring ovulation. The at start end did not effect interval neither modest barn. However, light during daytime results this study suggest that more sunlight advances season. This likely mediated through biological short wavelength blue its melatonin suppression rhythms. We greater/direct component improves response present can further assist optimize conditions lead efficient transition mares.