Difference between revisions of "Chipmunk Reproduction - Anatomy & Physiology"
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* Seasonally Polyoestrous. | * Seasonally Polyoestrous. | ||
* Spontaneous ovulator. | * Spontaneous ovulator. | ||
| − | * Breeding season | + | * Breeding season is March-September. |
* Length of [[Female_Reproductive_Tract_-Oestrous_Cycle_-_Anatomy_%26_Physiology|oestrous cycle]]: 14 days | * 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 and Offspring == | ||
Revision as of 13:29, 30 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 in 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.