Benchmark
Globally the U.S. is ranked as what # as a pork-producing country?
3rd
What is the bench that separates the clean and dirty sides of a barn?
Danish Entry
What is the number one sign of Parvo Virus?
mummies or stillborns (stair stepping)
What is the equation for estimated breeding value?
individuals performance - average performance x heritability
Hampshires are known to carry what gene that affects meat quality?
Napole gene
How many pigs are weaned per sow per year?
25-30
What is the number one biosecurity risk to pigs?
Other pigs
What do we vaccinate sows for?
Lepto and Parvo
What is heterosis?
% improvement of offspring compared to average of the parents
What breed is typically used for heat checking boars?
Meishan
What is the ADG for nursery and finisher?
Nursery: .90-1.00
Finisher: 1.8-2.0
Examples of active and passive immunity
Active immunity=vaccination
passive immunity=colostrum
What are common enteric diseases and in what stages?
baby pigs: E. coli and Clostridium
Nursery: Hem. E. Coli
Finishing: Ileitis
Why have producers moved away from rotational breeding programs?
We don't get 100% heterosis (67-86%) and need to replace gilts more often
What does PSE stand for?
Pale, Soft, and Exudative
What is the farrowing interval?
days between farrowing until the next (gestation + Lactation + WSI)
What time of year do most PRRSv outbreaks occur and why?
Late fall to early spring
Due to cold and moist conditions
What are the 2 components of Porcine Respiratory Disease Complex?
Viral: PRRSv
Bacterial: Mycoplasma
What rota-terminal breeding and what's it's major advantage?
When 15% of the herd produced F1 females (85% of herd) and they are then bred to terminal sires.
Major advantage = 100% heterosis
Nutrition plays a small role in pork quality, what are two other factors?
Genetics and handling (pre-slaughter stress & not rapid cooling)
With decreased sow herd numbers, why are the pounds of pork produced continuing to increase?
Larger litter sizes
Increased Market Weights
What is the processes of Isolation and Acclimation?
Isolation: growing gilts on farm in a separate barn, testing them, immunizing them and moving them in
Acclimation: After isolation, bring them to be exposed to cull animals and herd diseases. (used in positive stable pop.)
What do we vaccinate weaned pigs for and finisher pigs for?
Weaned pigs: Mycoplasma
Finisher pigs: Ileitis
You have a 6000 sow herd with a replacement rate of 50%. How large does the multiplier farm need to be to provide your yearly supply of replacement gilts?
6000 sows x2= 12000/25psy =480 sows
half would be 3000 sows but we want selection from the top 50% so keep 6000
Describe the relationship between lactic acid, pH, and pork quality.
If a pig has poor genetics or high stress, it can have a buildup of lactic acid, which causes a decrease in pH post-mortem creating poor meat quality like PSE.