ANSC 10200 Lecture Notes - Lecture 21: Weaning, Gilt-Edged Securities, Gestation
27 Nov 2018
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Document Summary
The basics: scientific name, sus domesticus, porcine, classification, sow, boar, gilt, barrow. Global pig numbers: top ten pig producing countries, china, european union, united states, brazil, russia, vietnam, canada, Philippines, mexico, south korea: inventory of head increasing, total operations decreasing, . 7 billion pork exports in 2016. Common us breeds: yorkshire, duroc, berkshire, hampshire. Stage of production: breeding, gestation, farrowing, 2-3 lbs at birth, weaning, 12-15 lbs, feeder/market hog, 50-60 lbs after nursery phase, 280 lbs at market weight, replacement. Breeding: may occur at any time of the year, natural vs ai, semen must be fresh, estrous cycle, 21 days. Gestation: 112-115 days (3 months, 3 weeks, 3 days, gilts reach maturity and are bred at 170 to 220 days of age, after first litter, gilts become sows. Farrowing: moved to farrowing barn when ready to give birth, typically 12-13 piglets per litter, 2-3 lbs at birth, sows nurse until piglets are weaned at 21 days, 12-15 lbs at weaning.
