Difference between revisions of "Chipmunk Reproduction - Anatomy & Physiology"
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| − | + | == 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 == | == Female == | ||
| − | * [[ | + | === Reproductive Tract === |
| + | |||
| + | * [[Uterus - Anatomy & Physiology#Anatomical_Types_of_Uteri|Bicornate uterus]] | ||
** Short uterine body | ** Short uterine body | ||
| − | ** Single [[ | + | ** Single [[Cervix - Anatomy & Physiology|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 - Anatomy & Physiology|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. | ||
| − | + | [[Category:Small Mammal Reproduction]] | |
| + | [[Category:Bullet Points]] | ||
Latest revision as of 13:51, 5 July 2012
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.