Difference between revisions of "Chipmunk Reproduction - Anatomy & Physiology"
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| − | + | <big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big> | |
| − | === Penis | + | <big><center>[[Reproductive_System#Small_Domestic_Mammals|'''BACK TO SMALL DOMESTIC MAMMALS''']]</center></big> |
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| + | = Male = | ||
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| + | == Penis == | ||
* Os penis lies within the tissue of the penis. | * Os penis lies within the tissue of the penis. | ||
| − | + | == Testes == | |
* Two testes in an external scrotum. | * Two testes in an external scrotum. | ||
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** 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 == | |
* Sexually mature at 6-7 weeks. | * Sexually mature at 6-7 weeks. | ||
| − | + | == Mammary Gland == | |
* Teats are absent. | * Teats are absent. | ||
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| − | + | ---- | |
| − | * [[ | + | = Female = |
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| + | == Reproductive Tract == | ||
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| + | * [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]] | ||
** Short uterine body | ** Short uterine body | ||
| − | ** Single [[ | + | ** Single [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] |
| − | + | == Puberty and Sexual Maturity == | |
* Sexually mature at 12 months. | * Sexually mature at 12 months. | ||
| − | + | == Oestrous Cyclicity == | |
* Seasonally Polyoestrous. | * Seasonally Polyoestrous. | ||
* Spontaneous ovulator. | * Spontaneous ovulator. | ||
* Breeding season is March-September. | * Breeding season is March-September. | ||
| − | * Length of [[ | + | * Length of [[Female_Reproductive_Tract_-Oestrous_Cycle_-_Anatomy_%26_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. | + | * [[Reproductive_System#Gestation|Gestation]] period 28-32 days. |
| − | + | === Litter === | |
* Litter size 2-6 | * Litter size 2-6 | ||
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** Weaned at 6-7 weeks | ** Weaned at 6-7 weeks | ||
| − | + | == Mammary Gland == | |
* 4 pairs of teats. | * 4 pairs of teats. | ||
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Revision as of 07:11, 31 July 2008
Male
Penis
- Os penis lies within the tissue of the penis.
Testes
- Two testes in an external scrotum.
- Testes descend into the scrotum at the beginning of the mating season (January) and begin spermatogenesis.
- Open inguinal canals throughout life.
- Allows testes to shrink and return to the abdomen in the non-breeding season.
Puberty and Sexual Maturity
- Sexually mature at 6-7 weeks.
Mammary Gland
- Teats are absent.
Female
Reproductive Tract
- Bicornate uterus
- Short uterine body
- Single cervix
Puberty and Sexual Maturity
- Sexually mature at 12 months.
Oestrous Cyclicity
- Seasonally Polyoestrous.
- Spontaneous ovulator.
- Breeding season is March-September.
- Length of oestrous cycle: 14 days
- Oestrus lasts three days.
- Advertises willingness to mate with persistent chipping noise on the second day of oestrus.
Gestation and Offspring
Gestation
- Gestation period 28-32 days.
Litter
- Litter size 2-6
- Altricial young
- Weaned at 6-7 weeks
Mammary Gland
- 4 pairs of teats.