BSE Flashcards
characteristics for a successful breeding season
-large number of females pregnant in a short breeding season
requirements of male in successful breeding operation
-the ability to detect females in heat
-physical capability to mount a female
-physical capability to deposit fertile semen into female tract
what factor does a BSE not measure
male libido
what is the most reliable measure of fertility
pregnancy rate
how many days before the breeding season should a BSE be done
60 days
components of BSE
-physical examination
-external and internal evaluation of the reproductive tract
-semen collection and evaluation
faults in BSE
-does not guarantee fertility
-does not detect libido
classifications of BSE
-satisfactory
-questionable
-unsatisfactory
satisfactory BSE score
-male meets or exceeds all minimum standards for motility, morphology, and scrotal circumference
questionable BSE score
male has the potential to pass but have failed due to some type of temporary illness, injury, or stressor
unsatisfactory BSE score
male does not pass one or more sections of BSE and do not have the ability to recover reproductive capability
factors influencing BSE
-age
-disease
-heat stress
-body condition
-breeding pressure
-collection procedure
-selection pressure(what % of sperm company wants motile)
BSE physical examination measures
-health and body condition
-structural soundness
-eyes and teeth
BSE external evaluation
-palpation of scrotum and testes
-examination of penis and sheath
-measure the scrotal circumference
BSE internal examination
-palpation of accessory sex glands
semen collection methods
-artificial vagina
-electroejaculation
-massage
-“gloved” hand method
what does an artificial vagina mimic
-temperature
-pressure
-lubrication
-position
what animal has the highest volume of sperm? the least
most: boar
least: ram
what animal has the highest concentration of sperm? the least?
most: ram
least: boar
how is the concentration of sperm measured
hemocytometer
densimeter
spectophotometer
purpose of semen extension
-increase volume of ejaculate(increase # of potential breeding)
-preserve viability of sperm
what is the ability of semen to be extended dependent on
-concentration
-quality(motility & morphology)
-fertility of sire
components of semen extender
-source of nutrients
-pH stabilizer
-Cryoprotectant
-antibiotic
what are used as sources of nutrients in semen extender
yolk
buttermilk
glucose
what are used as antibiotics for semen extender
penicillin
streptomycin