Season Impacts Reproduction Influence of Daylength

Influence of Daylength

Doe with kid on pasture.

The environmental cue most dominantly affecting seasonal breeding in small ruminants is the annual change in day length (goats are considered short day breeders). Seasonal anestrous occurs when the day length increases and this period is associated with an absence of estrus and ovulation and decreased secretion of the reproductive hormones. Seasonal species are responsive to a hormone called melatonin which is produced by the pineal gland in response to declining periods …