Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
Conventional Farrow to finish:
|
breeding-gestation, farrowing, nursery and finishing all in one place
|
|
|
Segregated early weaning:
|
Site 1: Breeding-gestation, farrowing
Site 2: Nursery Site 3: Finishing |
|
|
Geographic shift in hog production
|
Sows are leaving the corn states
Hogs went to NC because NC developed a better system (and has less restrictions) Hogs are moving west to get away from rain and people |
|
|
Pork is #_ worldwide
|
1
|
|
|
_______ is #1 in pork consumption
|
Denmark
|
|
|
Duroc:
|
paternal breed, red, droopy ears
|
|
|
Hampshire:
|
paternal bred, black w/ white belt, erect ears
|
|
|
Yorkshire:
|
maternal bred, white, erect ears
|
|
|
Landrace:
|
maternal bred, white, large droopy ears
|
|
|
Breeding Stock Selection for swine
|
Structurally Sound- ability to walk/ move (50% heritable)
Eliminate the PSS (stress gene)- major cause of low quality pork (pal, soft extrdite(watery):PSE) |
|
|
Categorizing Swine Breeds
|
Colored: Paternal- muscle, growth traits
White: maternal, milke, litter size, mothering ability |
|
|
Sows:
|
larger litters of heavier pigs than gilts
|
|
|
Suggested replacement level=
|
20-25%
|
|
|
Potential Selection Criteria
|
Visual observation
Individual and parental performance records EPDs |
|
|
EPDs:
|
Stages- NBA (# births alive)
D/250 (dies to 250#) MLI (maternal line index) SPI (sow productivity index) TSI (terminal sire index) LWT (21 d litter weight) BF (backfat) |
|
|
Usage of Hybrid Swine Lines
|
•Most common
•All offspring go to market |
|
|
Estrus detection:
|
expose to boar… will flirt, wont move when pressure on back
|
|
|
Mating systems:
|
pen mating, AI
|
|
|
Reproductive performance:
|
2.2 litters/ yr
litter size of 10-12 pigs weaned at 21 days |
|
|
Farrowing:
|
giving birth
|
|
|
Farrowing stalls:
|
protect babies from being crushed; provides dual heat
|
|
|
Reproductive traits are ______ _______; how to control them?
|
lowly heritable: manage environment, minimize disease, provide adequate nutrition
|
|
|
Age at Puberty:
Estrous cycle: Duration of estrus: Occurrence of ovulation: Gestation length: 1st estrus postpartum: |
Age at Puberty: 4-7 mo
Estrous cycle: 21 d Duration of estrus: 2-3 d Occurrence of ovulation: 2nd day of estrus Gestation length: 114 d 1st estrus postpartum: 3-5 d postmweaning |
