Ch18 - Mice Flashcards

(38 cards)

1
Q

What is the most common form of enrichment for mice?

A

Group housing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the term used when a mouse (or any animal) chews the hair off its cagemates?

A

Barbering

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In addition to having no hair, what is another characteristic of nude mice?

A

They have a deficiency in their immune system.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

If a mouse’s dorsal pelvic bones are readily palpable, and the segmentation of its vertebral column is evident, it would be considered _______________, with a body condition score of _____.

A

Under-conditioned; BCS = 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What stocking density (number of animals per cage) for mice is indicated by the Guide?

A

4-5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How long is the gestation period in non-lactating female mice?

A

19-21 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How long after mating can mucous plugs remain in the rodent’s vagina?

A

24 hours

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the average weight of a newborn mouse?

A

1 - 1.5 grams

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How often do female mice go into estrus?

A

Every 4-5 days

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is “tunnel handling”?

A

Letting a mouse enter an enclosed tube and moving the tube between cages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is one advantage to feeding mice pelleted feed?

A

Mice gnaw the pellets, which helps to wear down their incisors (preventing malocculsion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the scientific name for the common laboratory mouse?

A

Mus musculus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

true or false: Removing the dominant mouse will stop mice from fighting their cage mates

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

When is toe clipping usually done?

A

With neonates, with IACUC approval (not a recommended ID method)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does the designation “F1” mean for a hybrid strain?

A

It’s the first generation of the mating scheme

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are three factors that influence the level of aggression shown by mice?

A

Territoriality, social dominance, and strain

17
Q

True or False: outbred mice are created by mating a closed population (animals at least 4 generations) of unrelated animals.

18
Q

True or False: Mice less than 10 days old may be cause by cupping the hands around the whole body or by picking up a group of pups together with a small amount of nesting material

19
Q

True or False: Both respiration and heart rate in the mouse are easily measured by observing or feeling the chest

A

False (heart rate and resp. rate are too fast to observe visually)

20
Q

True or False: An acceptable management technique that may reduce or prevent fighting among male mice housed together is to house young males together from weaning.

21
Q

True or False: Inbred strains usually have larger litters than outbred stocks

A

False (smaller litters)

22
Q

True or False: By 7 days of age, mouse pups are fully furred and their eyes are open

A

False (occurs ~10-14 days)

23
Q

What are hybrid mice?

A

The offspring of two different strains of mice

24
Q

True or False: Female mice exposed to constant light may stop having an estrous cycle

25
List 5 signs of pain, distress or illness in mice.
1. ruffled fur 2. dehydration 3. hunched posture 4. inactive 5. weight loss
26
Skin tenting and sunken eyes are signs of what health problem?
Dehydration
27
Newborn mice are ___________, meaning that they are born hairless and helpless, with eyes and ear canals closed
Altricial
28
What is the term for coming into heat 24 hours after giving birth? (time period varies between species)
postpartum estrus
29
How much does an adult male mouse weigh?
20-40 grams
30
How much does an adult female mouse weigh?
18-35 grams
31
What is the average life span of a mouse?
12 - 36 months
32
Female mice come into heat within ___ hours of parturition
14 - 28 hours
33
How many pups are generally in a mouse litter?
4 - 12 mice
34
At what age (days) are mice pups weaned?
21-28 days
35
Disturbing litters after birth can lead to ________.
Cannibalism
36
Failure to wean litters on time can lead to ________.
Overcrowding
37
Females reach puberty/estrus around ______ weeks, but they typically don't start breeding until ____ days.
4 - 5 weeks; 50 days
38
Low humidity in an animal room can cause what disease in mice?
Ringtail