reproductive efficiency
: # live offspring born in a period of time
importance of repro efficiency
: more born --> more to sell-->stability of operation
repro efficiency effect on maintenance cost/unit
: more babies--> lower cost/unit
repro efficiency effect on selection process
: m...
🗸🗸🗸: more born --> more to sell-->stability of operation
repro efficiency effect on maintenance cost/unit
🗸🗸🗸: more babies--> lower cost/unit
repro efficiency effect on selection process
🗸🗸🗸: more babies--> greater oppurtunity for genetic improvement
species differences
🗸🗸🗸: know what environment, management, and goal is best for each animal
physiology influence on repro efficiency
🗸🗸🗸: does animal have physical ability to reproduce
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,genetic potential influence on repro efficiency
🗸🗸🗸: does animal have gene for multiples
nutrition influence on repro efficiency
🗸🗸🗸: too fat or too thin
season influence on repro efficiency
🗸🗸🗸: spring long days = best to repro
other factors influence on repro efficiency
🗸🗸🗸: heat+humidity not good for repro
Testes
🗸🗸🗸: primary sex organ in males
Gamete (sperm) function
🗸🗸🗸: in testicle, sperm is produced by seminiferous tubules
endocrine function
🗸🗸🗸: within testicle, testosterone is produced by interstitial cells
epididymis
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, 🗸🗸🗸: long tube attached to side of testicle - functions as area for sperm maturation and
storage - sperm must be mature before active
Vas Deferens
🗸🗸🗸: tube that transports sperm from epididymis to urethra
Ampulla
🗸🗸🗸: a reservoir in animals that ejaculate rapidly (bulls, stallions, ram, and buck)
- found where urethra meets vas deferens
- temporary storage depot for sperm
prostate gland
🗸🗸🗸: nourish and stimulate activity of sperm
-opens into urethra close to opening to bladder
vesicular gland (seminal vesicles)
🗸🗸🗸: neutralize urine residues and stimulate activity of sperm
bulbourethral glands (cowpers glands)
🗸🗸🗸: neutralize urine residues, add volume to ejaculate, form gel in boar semen that
plugs cervix in sow
-opens into urethra
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