Lab Animal Breeding Flashcards
Define Polyestrous
Having more than 1 estrous or heat cycle per year
Seasonally polyestrous
Define Monoestrous
Having 1 estrous or heat cycle per year
Define Induced Ovulators
Ovum released only after copulation
What species are monogamous in research?
Rodents, especially gerbils
What species are polygamous/harem in research?
Primates, rats, mice, cats, guinea pigs and farm animals
What are the pros and cons of polygamous/harem in research?
Pro - most economical method
Con - difficult to keep accurate records
Define Intensive Breeding System
Involves continuous housing of male and female animals
Define Non-intensive Breeding System
Separate housing for the male and female while the female is pregnant
Define Outbreeding
Animals in a large colony where mating occurs randomly with unrelated litters
Why is outbreeding good?
1) Max amount of genetic variation
2) Usually produces more vigorous animals
Define Inbreeding
Mating of brother-sister or parent-offspring for more than 20 generations
When does puberty occur in non-human primates?
2-3 years of age
When does sexual maturity occur in non-human primates?
2.5-3.5 in females and 1-2 years long in males
What marks sexual maturity in non-human primates?
Menstruation in females
Spermatogenesis in males
Most non-human primates have a ____________ cycle
Non-seasonally polyestrous
