Life History Traits Flashcards
1
Q
Activity
A
- 7-24% active (walking or trotting)
- 5-10% social (engaged w/ other dog)
- majority of time sitting, standing, resting, and sleeping
2
Q
Sleep
A
- 16 mins asleep, 5 mins awake
- kenneled/caged dogs have 30mins-2 hrs awake time, to longer periods of rest
- 10-12% in REM sleep
3
Q
Sexual Development of Bitch
A
- non-seasonal breeder
- 1-4 cycles per year, mainly 2 (Basenjis have 1 cycle per year)
- onset of puberty, b/t 6-15 months
- fertility declines 33% by age 6
4
Q
Stages of Estrous Cycles
A
- spontaneous ovulator
- cycle consists of: proestrus(bleeding), estrus(breeding), diestrus, anestrus(hormonally similar to spayed female
- bitch born w/ 500,000 potential ova
5
Q
Sexual Development in Males
A
- testes in scrotum at 5 weeks
- fertile at 9-10 months
- peak production at 2-7 years
- first ejaculates may lack viable sperm
- have 4 billion sperm reserve
- attracted to estrus bitches, examine urine
- methyl-p-hydroxybenzoate is releaser of sexual behavior
6
Q
Retained Testicles
A
- left testicle hangs lower
- sex linked recessive
- become cancerous and need removal
7
Q
Timing of Breeding
A
- standing/flagging day of LH release
- ovulates immature 2 days before ready, 1st meiotic division
- ovulates of over 12 hrs, over 48 it undergoes another division
- 6 days after ovulation is too late
- 4 days after ovulation may have small litter
8
Q
Follicle Stimulation Hormone
A
- source: anterior pituitary
- target: ovarian follicle
- action:stimulates follicle and egg to grow
9
Q
Estrogen
A
- source: growing follicle
- target:uterine lining
- action: repairs uterine lining, stimulates LH, inhibits FSH
10
Q
Luteinizing Hormone
A
- source: anterior pituitary
- target: ovarian follicle
- action: activates enzymes that cause ovulation, formation and maintains corpus luteum
11
Q
Progesterone
A
- source: corpus luteum
- target: uterine lining
- action: increases thickness and gland secretion in uterine lining, decreases muscle concentration, inhibits LH
