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How daylight affects reproduction in sheep

Authors: Barrell GK
Publication: New Zealand Veterinary Journal, Volume 31, Issue 8, pp 137-138, Aug 1983
Publisher: Taylor and Francis

Animal type: Livestock, Production animal, Ruminant, Sheep
Subject Terms: Behaviour, Endocrine/autocrine/paracrine, Eye/opthalmology, Clinical examination, Seasonality/photoperiod, Reproduction, Reproduction - female, Reproduction - male
Article class: Review Article

Abstract: Seasonal patterns of reproduction in New Zealand sheep flocks arise primarily from the annual changes in daily photoperiod. Sheep detect these changes in lighting by means of a built-in biological “clock” and this information is relayed to the hypothalamic-gonadal axis via the pineal gland. The current level of understanding of the mechanisms which are involved in these processes is briefly reviewed.

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