Selection and Evaluation of Breeding Animals . AgriScience 2. Bell Work. Whats wrong with these pictures?. Factors affecting Selection. Production Environment Performance Needs Marketing Goals. High Stress low feed input concrete confinement climate low labor input. Low Stress
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Selection and Evaluation of Breeding Animals
low feed input
low labor input
year around feed quality good
birthing assistance available
large litter size
Aggressive breeding behavior.
Seed stock Herd
Know the anatomy of the animal.
Select only healthy females.
Females should be tested for appropriate diseases for species and certified disease free.
Select replacement females from home herds when possible.
Prolific- min 8/9 offspring
2.5 to 4 lb birth wt.
21 day litter wt= milking ability
Sow index- how good she is compared to her peers (contemp. group)
L= # piglets born alive
l= avg. # piglets born alive for contemp group
W= 21 day weight for individual
w= 21 day weight for contemp group
an avg. of 7
Performance testing results
Age at 230 pounds
Amount of back fat
Average daily gain
Typically 2 or three from the same litter will be tested
Independent Study Assignment
1. Find selection standards for males and females of your species in the criteria we have just discussed.
2. Find all breeding statistics for your species:
Estrus period length