How does the breeding cycle of seasonal breeders relate to daylight?

The breeding cycle of seasonal breeders, such as many sheep breeds, is significantly influenced by the amount of daylight they receive. This phenomenon, known as photoperiodism, affects their reproductive hormones and behavior. In sheep, longer days usually signal a time for increased daylight exposure, which can stimulate estrus and enhance reproductive function. Conversely, shorter days tend to trigger a quieter reproductive period.

Seasonal breeders have adapted to time their breeding so that the offspring are born at optimal times of the year, often in the spring when resources are abundant. This adaptation allows for better survival rates of the young sheep, making it a critical factor in their reproductive strategy. Therefore, the correlation between the breeding cycle and the amount of daylight is essential for understanding sheep reproduction and management practices.