Pigs

Question 1

What are commercial pigs descended from

Answer 1

Sus scrofa

Question 2

Weight of adult boar

Answer 2

50-90kg

Question 3

Boars- when do maturing males migrate

Answer 3

20m

Question 4

Weight of sexual maturity in males

Answer 4

30kg

Question 5

Gestation

Answer 5

115d

Question 6

Average litter size

Answer 6

4-6

Question 7

Weight of piglets at birth

Answer 7

0.75-1kg

Question 8

Age of fully weaned piglets

Answer 8

3-4m

Question 9

Heavy hog slaughter weight

Answer 9

> 120kg

Question 10

Bacon market slaughter weight

Answer 10

100kg

Question 11

Cutter slaughter weight

Answer 11

70kg

Question 12

Fresh pork slaughter weight

Answer 12

55kg

Question 13

Weaning age of piglets

Answer 13

> 28d

Question 14

Killing out percentage

Answer 14

Carcass weight in terms of live weight 70-75%

Question 15

Age of slaughter

Answer 15

16w

Question 16

Where is fat depth measured

Answer 16

6.5cm off dorsal midline where last rib joins

P2 has smallest error

Question 17

How can you control high back fat

Answer 17

Select later maturing
Entire males leaner at slaughter
Maintained good conditions 
Correct diet
Prevent separation of diet
Good feed quality

Question 18

What causesPSE

Answer 18

Sudden ph drop
Pss pigs have halothane gene
Dramatic weather changes
Stress at slaughter

Question 19

What causes boar taint

Answer 19

Androsterone
Skatole
Indole

Question 20

What reduces boar taint

Answer 20

Castration

Slaughter before 24w

Question 21

How to prevent tail biting

Answer 21

Straw- lowers likelihood of tail biting if provided throughout rearing and finishing
Healthy pigs on arrival
Dry bedding
Water access
Enrichment objects- clean, attached, readily available, destructible, regularly rotated

Question 22

Causes of tail biting

Answer 22

Boredom/metabolic balance causing them to root
Frustration at inability to access resources
Fanatic pigs