Pigs Repro and domestication

Question 1

S. scrofa

Answer 1

DOmesticus
scrofa scrofa - western afirvca 
usurious - Nasia and Japan 
cristatsus - asia and india 
vitattus 

5000BC in Near East, china and mediterranean

Feral pigs are dedomesticated, environmental damage, aggressive behaviour
invasive!!

Question 2

Consequences of domestication

Answer 2

upright ears, small eyes, curled / linked tails greater variation in colours and markings
early maturation an 5-6 months, wild 18m

now continuous breeders, 8-12 pigs in litter

Gilt
shoat - 50-90kg
barrow - castrated male

Question 3

MaternLA BREEDS

Answer 3

Prolific, nursing abilities, good growth and gain, good meat quality

Question 4

PAternl

Answer 4

EXCELLENT GROWTH AND GAIN, WELL MNUSCELD 0 4 HAM PIGS

LOWER FERTITLIY, SENESTIVE TO SGTREES MHS

Question 5

Classsification

Answer 5

White with erect - large white, Yorkshire

White with drooping - landrace
Solid black with droop - large black

Solid red with droop - Tamworth, duroc

Spotted p pietrain

Black and white belted erect ears - Hampshire
Black and white marking,s erect ears p Poland china

Question 6

Yorkshire (maternal)

Answer 6

Yorkshire is the English large white - Maternal breeds

White, erect ears, 1760, now big in USA

muscular and lena meat, backlit

Large white - BG good growth and gain, medium long body, erect ears
stress resistant, high fertitilyu, good meat quality

Question 7

Landrace (maternal)

Answer 7

Danish
- BACON!! White, drooping ears, bred for pork

EU landrace
swedish, finish, germane, Hungarian, American
rapid growth, drooping ears, white skin, fertile and prolific
Mainly back type stress resistant §

Question 8

The colour pigs - paternal

Answer 8

Pie train, excellent meat, deep body, great dfrwsing percentage, 4 ham pig
- stress sensitive, excellent feed conversion

Duroc
- solid red, concave back line, musicals, convex head profile, most aggressive!

Hampshire
- black body with white belt, while shoulders and FL, long head, convex, well muscled
Hampshire factor- AD , protein kinase mutation =, strong decrease in pH 5.4 in muscle after slaughter, RSE

Tamworth, Poland china

Berkshire
Britains oldest pig, black with white tipped extremities
straight underline, dished snout

Question 9

Asian breeds

Answer 9

Meishan, pug face

• prolifically - 20 per litter, teat number
• high perinatal losses of piglet
• prolifically genes idetifeiedi

Vietnamese pot bellied

Wessex

Mulefoot
Black Iberian - Jason, Spain
- marbling

Magalica - healthy fat
-low fertility, 5-6 litter, endangered, fine but sting skeleton,

Gottinger minipig - labs, or kept as pets

Question 10

CYCLE

Answer 10

18-23 days
Polyovulation 15-20, embryonic and perinatal 10-30%

Heat 2-3 days, back pressure

Gestation 114, pPl, weaning 25-42 days, heat occurs 7 days after farrowing

FLUSHING - increase fertility