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Chipmunk Reproduction - Anatomy & Physiology (view source)
Revision as of 13:51, 5 July 2012
, 13:51, 5 July 2012→Mammary Gland
== Male ==
=== Penis ===
= Male =
== Penis ==
* Os penis lies within the tissue of the penis.
* Os penis lies within the tissue of the penis.
== Testes ==
=== Testes ===
* Two testes in an external scrotum.
* Two testes in an external scrotum.
* Testes descend into the scrotum in January and begin spermatogenesis.
* Testes descend into the scrotum at the beginning of the mating season (January) and begin spermatogenesis.
* Open inguinal canals throughout life.
* Open inguinal canals throughout life.
** Allows testes to shrink and return to the abdomen in the non-breeding season.
** Allows testes to shrink and return to the abdomen in the non-breeding season.
=== Puberty and Sexual Maturity ===
== Puberty and Sexual Maturity ==
* Sexually mature at 6-7 weeks.
* Sexually mature at 6-7 weeks.
== Mammary Gland ==
=== Mammary Gland ===
* Teats are absent.
* Teats are absent.
== Female ==
=== Reproductive Tract ===
* [[Uterus - Anatomy & Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]]
* [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]]
** Short uterine body
** Short uterine body
** Single [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]]
** Single [[Cervix - Anatomy & Physiology|cervix]]
== Puberty and Sexual Maturity ==
=== Puberty and Sexual Maturity ===
* Sexually mature at 12 months.
* Sexually mature at 12 months.
== Oestrous Cyclicity ==
=== Oestrous Cyclicity ===
* Seasonally Polyoestrous.
* Seasonally Polyoestrous.
* Spontaneous ovulator.
* Spontaneous ovulator.
* Breeding season ia March-September.
* Breeding season is March-September.
* Length of [[Female_Reproductive_Tract_-Oestrous_Cycle_-_Anatomy_%26_Physiology|oestrous cycle]]: 14 days
* Length of [[Oestrous Cycle - Anatomy & Physiology|oestrous cycle]]: 14 days
* '''Oestrus''' lasts three days.
* '''Oestrus''' lasts three days.
* Advertises willingness to mate with persistent chipping noise on the second day of oestrus.
* Advertises willingness to mate with persistent chipping noise on the second day of oestrus.
=== Gestation and Offspring ===
==== Gestation ====
* Gestation period 28-32 days.
== Gestation and Offspring ==
==== Litter ====
* Litter size 2-6
* Litter size 2-6
* Altricial young
* Altricial young
** Weaned at 6-7 weeks
** Weaned at 6-7 weeks
=== Mammary Gland ===
* 4 pairs of teats.
[[Category:Small Mammal Reproduction]]
[[Category:Bullet Points]]