|
|
| (29 intermediate revisions by 3 users not shown) |
| Line 1: |
Line 1: |
| − | == Male ==
| + | <big><center>[[Reproductive System|'''BACK TO REPRODUCTIVE SYSTEM''']]</center></big> |
| | | | |
| − | The anogenital distance is longer in the male, which has a more prominent genital papilla.
| + | <big><center>[[Reproductive_System#Small_Domestic_Mammals|'''BACK TO SMALL DOMESTIC MAMMALS''']]</center></big> |
| − | === Penis ===
| |
| | | | |
| − | * Os penis lies within the tissue of the penis.
| |
| − | ** Supporting bone is the Baculum.
| |
| − | *** Baculum consists of two lateral prongs and a dorsal prong.
| |
| | | | |
| − | === Testes===
| |
| | | | |
| − | * Two large testes in an external scrotum. | + | * [[Hamster-Male- Anatomy & Physiology|Male]] |
| − | ** Retained in the scrotum by a pad of fat in the inguinal canal.
| + | * [[Hamster-Female- Anatomy & Physiology|Female]] |
| − | * Chinese Hamster:
| |
| − | ** Testes remain internal.
| |
| − | | |
| − | === Accessory Sex Glands ===
| |
| − | | |
| − | * Several large [[Accessory Sex Glands - Anatomy & Physiology|accessory glands]] including:
| |
| − | ** Ampulla Glands
| |
| − | ** Seminal Vesicles
| |
| − | ** Coagulating Glands
| |
| − | ** Prostate (three-lobed)
| |
| − | ** Bulbourethral Glands
| |
| − | * Produce a urethral plug.
| |
| − | | |
| − | * Scent gland on each flank to mark territory.
| |
| − | | |
| − | === Mammary Gland===
| |
| − | | |
| − | * Teats are absent.
| |
| − | | |
| − | == Female ==
| |
| − | | |
| − | === Reproductive Tract ===
| |
| − | | |
| − | ==== Ovary ====
| |
| − | | |
| − | * [[Ovary - Anatomy & Physiology|Ovaries]] are oval in shape, situated dorsolateral to the kidneys.
| |
| − | ** Completely enclosed in a fat-filled ovarian bursa. | |
| − | ** Uterine artery provides a major blood supply to the [[Ovary - Anatomy & Physiology|ovary]].
| |
| − | ** Coils of the ovarian and uterine arteries anastoamose close to the [[Ovary - Anatomy & Physiology|ovary]].
| |
| − | | |
| − | ==== Oviduct ====
| |
| − | | |
| − | * [[Oviduct - Anatomy & Physiology|Oviduct]] is long and tighly coiled.
| |
| − | | |
| − | ==== Uterus ====
| |
| − | | |
| − | * [[Uterus - Anatomy & Physiology#Anatomical_Types_of_Uteri|Duplex Uterus]]
| |
| − | ** Two seperate [[Cervix - Anatomy & Physiology|cervices]].
| |
| − | ** Uterine horns remain divided until uniting in a single [[Vagina and Vestibule - Anatomy & Physiology|vagina]].
| |
| − | | |
| − | ==== Vagina ====
| |
| − | | |
| − | * The urinary opening is cranial and the anus is caudal with the vaginal opening in between.
| |
| − | * [[Vagina and Vestibule - Anatomy & Physiology|Vagina]] has a pair of vaginal pouches.
| |
| − | ** Extend caudally, terminating at the level of the vaginal orifice.
| |
| − | | |
| − | === Oestrous Cyclicity ===
| |
| − | | |
| − | * Spontaneous [[Ovulation - Anatomy & Physiology|ovulator]].
| |
| − | ** [[Ovulation - Anatomy & Physiology|Ovulation]] occurs ~ 12 hours after the LH surge, usually resulting in the release of ova at night (hamsters are nocturnal).
| |
| − | * Seasonally polyoestrus
| |
| − | * Oestrus every 5-7 days
| |
| − | ** Secretes copious white vaginal discharge during oestrus.
| |
| − | *** Changes consistency from stringy to waxy over the 3 day oestrus period.
| |
| − | * Post-partum oestrus
| |
| − | | |
| − | === Copulation ===
| |
| − | | |
| − | * Lasts 30 minutes.
| |
| − | * Mating may be confirmed by the presence of a ''''copulatory plug''''.
| |
| − | ** A creamy, gelatinous plug formed from secretions of the male [[Accessory Sex Glands - Anatomy & Physiology|accessory glands]].
| |
| − | * Pseudopregnancy can occur after an infertile mating.
| |
| − | | |
| − | === Mammary Gland ===
| |
| − | | |
| − | * 6 pairs of teats
| |
| − | * Extend from the thoracic to inguinal region.
| |
| − | | |
| − | | |
| − | === Breed Differences ===
| |
| − | | |
| − | ==== Syrian (Golden) hamster ====
| |
| − | | |
| − | [[Image:hamster fetus.jpg|thumb|right|150px|Syrian Hamster Foetus during Late Gestation- Courtesy of Andrew Crook, Copyright RVC 2008]]
| |
| − | | |
| − | * Sexually mature at 6-8 weeks
| |
| − | * Gestation period: 6-8 days
| |
| − | * Litter size 5-9: offspring
| |
| − | ** Weaned at 21-28 days.
| |
| − | | |
| − | ==== Russian Hamster ====
| |
| − | | |
| − | * Sexually mature at 6-8 weeks
| |
| − | * Gestation period: 6-8 days
| |
| − | * Litter size: 4 offspring
| |
| − | ** Will cannabilise young if disturbed.
| |
| − | ** Weaned at 16-18 days.
| |
| − | | |
| − | ==== Chinese Hamster ====
| |
| − | | |
| − | * Sexually mature at 7-14 weeks
| |
| − | * Gestation period 7-14 days
| |
| − | * Litter size: 4 offspring
| |
| − | ** Will cannabilise young if disturbed.
| |
| − | ** Weaned at 21 days.
| |
| − | | |
| − | [[Category:Small Mammal Reproduction]]
| |
| − | [[Category:Bullet Points]]
| |