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Puberty Onset Influencing Factors - Anatomy & Physiology (view source)
Revision as of 07:36, 9 September 2008
, 07:36, 9 September 2008→Photoperiod
== Photoperiod ==
== Photoperiod ==
The month of birth will influence the onset of puberty, especially in seasonal breeders.
The month of birth will influence the onset of puberty, especially in [[Female_Reproductive_Tract_-Seasonality_of_Reproduction_-_Anatomy_%26_Physiology|seasonal breeders]].
=== Sheep ===
=== Sheep ===
* Short day breeders (begin oestrous cycles in response to short day length)
* [[Female_Reproductive_Tract_-Seasonality_of_Reproduction_-_Anatomy_%26_Physiology|Short day breeders]] (begin oestrous cycles in response to short day length)
* Spring born lambs (February-March) reach puberty in the subsequent autumn (September-October) if they have adequate nutrition. The age at puberty is 5-6 months.
* Spring born lambs (February-March) reach puberty in the subsequent autumn (September-October) if they have adequate nutrition. The age at puberty is 5-6 months.
* Autumn born lambs do not reach puberty until 10-12 moths of age.
* Autumn born lambs do not reach puberty until 10-12 moths of age.
=== Queen ===
=== Queen ===
* Long day breeders
* [[Female_Reproductive_Tract_-Seasonality_of_Reproduction_-_Anatomy_%26_Physiology|Long day breeders]]
* Increasing photoperiod prompts onset of puberty.
* Increasing photoperiod prompts onset of puberty.
* Onset of puberty occurs in January-February in the Northern Hemisphere, where there is increasing day length.
* Onset of puberty occurs in January-February in the Northern Hemisphere, where there is increasing day length.