Life History Traits Flashcards

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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
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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
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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
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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
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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
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6
Q

Retained Testicles

A
  • left testicle hangs lower
  • sex linked recessive
  • become cancerous and need removal
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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
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8
Q

Follicle Stimulation Hormone

A
  • source: anterior pituitary
  • target: ovarian follicle
  • action:stimulates follicle and egg to grow
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9
Q

Estrogen

A
  • source: growing follicle
  • target:uterine lining
  • action: repairs uterine lining, stimulates LH, inhibits FSH
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10
Q

Luteinizing Hormone

A
  • source: anterior pituitary
  • target: ovarian follicle
  • action: activates enzymes that cause ovulation, formation and maintains corpus luteum
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11
Q

Progesterone

A
  • source: corpus luteum
  • target: uterine lining
  • action: increases thickness and gland secretion in uterine lining, decreases muscle concentration, inhibits LH
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