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Oestrous Cycle Pharmacological Manipulation - Anatomy & Physiology (view source)
Revision as of 08:33, 12 September 2008
, 08:33, 12 September 2008→Light
=== Light ===
=== Light ===
* Cyclic activity in the mare, ewe, goat and cat depend on changes in the number of daylight hours.
* Tungsten and fluorescent lamps can be used to artificially manipulate the photoperiod.
* Mare and queen are stimulated by increasing day length (long day breeders)
** If mares are establed in December and exposed to artificial light for increasing duration, the onset of oestrous cyclicity and oculation wil be advanced.
* Ewe and goat are stimulated by decreasing day length (short day breeders)
** Providing ewes with controlled light housing enables change in the breeding season from autumn and winter to spring and summer.
** If there is no change in duration of light stiulus, it is possible to make ewes cycle all year round.
=== Nutrition ===
=== Nutrition ===