The Laboratory Rabbit, Guinea Pig, Hamster, and Other Rodents

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M. Suckow, K. Stevens, and R. Wilson, editors, 2012. The Laboratory Rabbit, Guinea Pig, Hamster, and Other Rodents, 1st edition. Elsevier, Oxford, UK.
Chapter 38 Taxonomy and History, pp.949-955

1. One of the earliest prospective studies using chinchillas appeared in:

a. 1942

b. 1952

c. 1962

d. 1969

2. Research related to what system remains the primary field utilizing chinchillas as an experimental model?

a. gastrointestinal

b. olfactory

c. auditory

d. musculoskeletal

3. The fossil record for the family Chinchillidae appears how many years ago?

a. 34 million

b. 14 million

c. 4 million

d. 4 thousand

4. True or False: Chinchillas belong to order Rodentia and are hystricomorphous rodents.

5. Which of the following statements is false regarding hystricomorphs?

a. Guinea pigs and porcupines are hystricomorphs.

b. They have smaller infraorbital foramina.

c. Their masseter muscle anatomy is modified.

d. They have great biting force and jaw mobility.

6. Which of the following statements is false regarding modern Chinchillidae?

a. They were described in 1782.

b. The name was coined in 1833.

c. There are now considered to be two distinct species of Chinchilla.

d. The two chinchilla species are the long-tailed chinchilla and the wirehaired chinchilla

7. Which of the following does not fall within the Family Chinchillidae?

a. Chinchilla lanigera

b. The mountain vaschacha

c. Guinea pig

d. The plains vaschacha

8. Wild chinchillas are found in all the following countries except:

a. Chile

b. Panama

c. Bolivia

d. Peru

9. True or False: Both chinchilla species are “critically endangered” and listed as CITES Appendix 1.

10. The decrease in wild chinchilla populations from 19th century to recent times is attributed to what?

a. Fur trade

b. Habitat encroachment

c. Being hunted for meat

d. Infectious disease spread

11. Chinchillas were initially difficult to raise in captivity because:

a. Adults fought and killed one another during breeding

b. Litters were killed by parents

c. Young were attacked by unrelated adults

d. All the above

12. The first person to collect and bring chinchillas to the United States for captive breeding was:

a. Mathias Chapman

b. Bowen Jenkins

c. Todd Marshall

d. Jeremiah Smith

13. The first organized sale of chinchilla pelts in the US occurred in ____; however due to sales prices far below expectations, the breeder market collapsed.

a. 1924

b. 1944

c. 1954

d. 1966

14. True or False: There is no recorded history describing the process of chinchillas becoming available in biomedical research.

15. Which of the following is false regarding chinchillas?

a. Genetic information commonly associated with research rodents does not exist for chinchillas.

b. There are no chinchilla “breeds”, but color varieties are common.

c. The basis of color varieties is in five dominant and four recessive mutations.

d. The first persistent color variety was with black fur then brown and white fur types.

16. True or False: It is widely reported that the domestic chinchilla industry was founded on only 12 animals (3 females and 9 males).

17. True or False: Domestic chinchillas may be an interspecies hybrid of the long- tailed chinchilla and the rough-coated chinchilla.

18. Which of the following statements regarding chinchillas is false?

a. A recent study concluded that there was no evidence for either domestic long-tailed or short-tailed chinchillas being hybrids.

b. Interspecies hybrid chinchilla have a larger body size, improved fur quality and better disposition.

c. Interspecies hybrids have larger litter sizes and are generally easy to breed.

d. Cross-breeding efforts were complicated by male F1 sterility.

1. b

2. c

3. a

4. true

5. b

6. d

7. c

8. b

9. true

10. a

11. d

12. a

13. c

14. true

15. d

16. true

17. false

18. c

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