Comparative urinary + reproductive system Flashcards
What are ‘caecatrophes’?
A. Urinary deposits
B. Soft pellets
C. Dry pellets
D. Diarrhoea
B. Soft pellets
True or false.
Both female and male chinchilla’s have 3 pairs of nipples.
True
How can you tell a female and male chinchilla apart, in relation to their anogenital space?
- Female = smaller space between the genitalia + anus
- Male = larger space between the genitalia + anus
Name the external orifice that combines the 3 bodily systems.
+
And what are they?
Vent
+
The Reproductive, Urinary + Digestive systems/tracts
What is the other name for the vent in birds?
Cloaca
What’s the difference between Oviparaous + Ovo-viviparous?
- Oviparaous = Egg laying externally
- Ovo-viviparous = Egg laying Internally
When sexting a rabbit what 2 key things should you look for?
- The presence of testes
- The shape of the external orifice
What is the shape of the female rabbit’s external orifice?
Slit shaped + pointed at the front
What is the shape of the male rabbit’s external orifice?
Prepuce is more circular
(Penis is easily protruded in the adult rabbi)
What is the gestation period of the rabbit?
28 - 32 days
When do rabbits meet sexual maturity?
3 months old
Why must female rabbits be spayed, unless they are to be used for breeding?
Because:
* An unmated female may remain in season until Autumn = can cause anaemia
* Causes prolonged enlargement of the vulva = predispose her to Pyometra
What months are Chinchilla’s in heat for?
November > May
Why are Chinchilla’s hard to sex?
Because both female + males both have large urethral prominences, that can be mistaken as a penis
What is the gestation period of the Guinea Pig?
60 - 72 days
(av. 65 days)
What is the main/common characteristic between the male + female external genitalia of rodents?
- In all females, the genital + urinary orifices are seperate + therefore have 3 openings.
Thus..
* Males = 2 openings
* Females = 3 openings
When are the gential orifices of rodents patent + therefore harder to locate?
When they are in season + prior to parturition
When do birds mate?
Later summer
What is the function of the preen gland in birds?
Production of oil + to keep plumage in good condition
They both begin with p…
What 2 species of bird produce ‘crop milk’ to feed their young?
- Pigeons
- Parrots
What is the weaning age in the ferret?
6 - 8 weeks/old
What is the litter size of a ferret?
2 - 6
How long is the ferret’s gestation period?
38 - 44 days
At what age does a Jill reach puberty?
7 - 10
months/old
At what age does a hob reach puberty?
5 - 15
months/old
What type of ovulator is the ferret?
Induced ovulator
What type of oestrus cycle does the ferret have?
Seasonally Monoestrous
What may happen to the jill’s young if she is disturbed?
She may eat them
If a jill is not mated with, how long may she remain in oestrus?
Forever
(this is fatal)
How many hours after mating does ovulation occur in ferrets?
30 - 40 hours
after
What months do jill’s season’s start + finish?
- Start = March
- End = September
What type of young do ferrets have?
Altricial
(helpless)
