Tag: glossary

Vas Deferens– (ductus deferens), the duct derived from the mesonephric duct that connects the tail of the epididymis to the ampulla and transports sperm into the pelvic urethra.

 

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Most Probable Producing Ability- (MPPA), Estimate of a cow’s future productivity for a trait (such as progeny weaning weight ratio) based on her past productivity.…

Birth Weight -(beef cattle)The weight of a calf within 24 hours after birth.

• Estimated Progeny Differences- (EPD’s) of the sire and dam are used to evaluate the genetic performance of the sire and dam to help determine birth weight before

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Haemophilus Somnus-A bacterial infection.

Clinical Symptoms

• fever
• incoordination
• head-pressing
• central nervous system signs

Prevention

• vaccine (two injections)
  • chlortetracycline, 350 mg/head/day for 28 days
  • oxytetracycline, 3-5 mg/lb daily for 4 days

Treatment

• Sulfonamides
• Oxytetracycline

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Calfhood Vaccination (Official Calfhood Vaccination)– Vaccination with Brucella abortus Strain 19 for heifers between 4 and 10 months old. The best age is at  5 months. Calfhood vaccination must be given by a federally accredited veterinarian (Most large animal …

Pay Weight– The actual weight for which payment is made. In many cases it is the shrunk weight

Formula:

• actual weight – pencil shrink = pay weight

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Outbreeding– The process of continuously mating females of the herd to unrelated males of the same breed.

Forms of Outbreeding:

• Outcrossing- the mating of unrelated animals
• Grading up- the mating of purebred sires to nondescript or grade females and

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Heiferette– A heifer that has calved once, after which the heifer is fed for slaughter. The calf has usually died or been weaned at an early age.…

Thermoneutral Zone (TNZ) – Range in temperature where rate and efficiency of performance is maximized. Comfort zone.…