Chaoter 18: Mice Flashcards
Which of the following is NOT an acceptable method for picking up a mouse?
A- grasp the tail near the bae, using your thumb and forefinger
B- grasp the mouse by the skin on the back of the neck using a smooth-tipped forceps
C- grasp the tip of the tail, using your thumb and forefinger
C- grasp the tip of the tail, using your thumb and forefinger
True or False
Mice less than 10 days of age may be caught by cupping the hands around the whole body or by picking up a group of pups together with a small amount of nesting material.
True
True or False
Both respiration and heart rate in the mouse are easily measured by observing or feeling the chest
False
Too fast to visualize
True or False
When a behaviorally dominant mouse chews fur off a more subordinate mouse, the behavioral condition is called trimming
False
Barbering
An acceptable management technique that may reduce or prevent fighting among male mice housed together is to house young males together from weaning
True
True or False
The “F1” on the end of a hybrid designation indicated that this is the second generation
False
It is the 1st generation
True or False
Inbred strains usually have larger litters than outbred stocks
False
Inbred usually have smaller litters
True or False
By 7 days of age, mouse pups are fully furred and their eyes are open
False
Eyes open 10-14 days
What are hybrid mice?
The offspring of two different strains of mice
What is the term for the condition that results when the incisors become overly long and do not align properly?
Malocclusion
What is the term for the space between the anus and genital papilla of most rodents?
Anogenital distance
How often do female mice come into estrus?
Once every 4 to 5 days
Weight of an adult male mouse (grams)
20-40 grams
Weight of a newborn mouse (grams)
1 - 1.5 grams
Average lifespan of a mouse in months
12-36 months
Longer anogenital distance in mice
Male
Shorter anogenital distance in mice
Female
Female mice come into heat within ______ hours of parturition
14-28 hours
A common sign that a mouse is sick
Ruffled fur
Gestation period for mice in days
19-21
Litter size in mice
4-12
Weaning age for mice in days
21-28 days
Disturbing mice litters after birth can lead to this
Overcrowding
This strain typically has smaller litters
Inbred strains
This strain of mice typically has larger litters
Outbred strains
Female mice start breeding at this age in days
50
What is a sign that neonatal mice are nursing well?
A white spot on the left side of the abdomen
Which of the following is a very common method of euthanizing mice?
A- decapitation
B- CO2 asphyxiation
C- captive bolt
D- cardiac injection of potassium chloride
B- CO2 asphyxiation
Mice are most active at night. What is the term used to describe being active at night?
Nocturnal
What is the scientific name of the common house mouse?
Mus musculus
What is the most common type of environmental enrichment for mice?
Group housing
What is the term for coming into heat 24 hours after giving birth?
Postpartum estrus
