MOD 3 - COURSE 3 - PT 2 - RAT Flashcards
rats have a gall bladder T/F?
F
what is porphrin and what can this indicate in rats
- red- brown pigment - secreted by haderian glands located behind the eyes
- secreted in times of stress, illness other issue
- can deposit around the nose
whats the weight of rat adult female and male
300-500g, 200-400g, ~5g
avg body temp fo rats?
35.9-37.5’C
heart rate avg of rats
250-600 bpm
respiration rate of rats
66-144 BreathPM
dailing avg food and water intake of rats?
5-6g/100g daily body weight
10-12ml /100g body weight daily
avg lifespan of rats
2.5-3.5 years
how do you determine sex of the animal
- twice as long anus-urogenital opening distance in males than females
are rats polyoestrous or monooesterous
polyoesterous
when do rats reach sexual maturity
~50 days
how long is there oestrous cycle
- 4-5 days
- 24 hours post partum
whats the gestation period of rats
20-22 days
whats the avagerage litter pup size of rats ?
7-11 PUPS
how old is the weaning age of young rats?
21 days
what are some example of outbred stocks
Wistar (WI)
Sprague Dawley (SD)
Long-Evan (LE)
What are some of the characteristics of Wistar WI strain of rat?
- albino rat
- wide head and long ears
- tail shorter than body
whata re some charactersitics of Sprague-Dawley SD strain of rat
- albino
- long and narrower head
- tail smae legnth as body
what are some characteristics of Long-Evan LE strain of rat
- smaller rat than others
- white body with black patches
- head- black hood
what are some examples of inbred strains of rats
- Lewis LEW
- Fisher344
what are some characterisitc of the Lewis LEW strain of rat?
used for toxicology and tetraology study of birth defects
what are some characteristics of Fisher 344 strain of rat
used in immunological studies and diabetes research
what are some usual behaviours of rats
- noctournal
- posture - erect on all 4 legs and hunched arrpearance cnan be a sign of disease
lifestyle, very high metabolic rate, active grooming, very adaptable to group housing - rarely agressive
