Pigs Flashcards

1
Q

What are commercial pigs descended from

A

Sus scrofa

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2
Q

Weight of adult boar

A

50-90kg

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3
Q

Boars- when do maturing males migrate

A

20m

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4
Q

Weight of sexual maturity in males

A

30kg

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5
Q

Gestation

A

115d

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6
Q

Average litter size

A

4-6

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7
Q

Weight of piglets at birth

A

0.75-1kg

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8
Q

Age of fully weaned piglets

A

3-4m

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9
Q

Heavy hog slaughter weight

A

> 120kg

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10
Q

Bacon market slaughter weight

A

100kg

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11
Q

Cutter slaughter weight

A

70kg

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12
Q

Fresh pork slaughter weight

A

55kg

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13
Q

Weaning age of piglets

A

> 28d

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14
Q

Killing out percentage

A

Carcass weight in terms of live weight 70-75%

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15
Q

Age of slaughter

A

16w

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16
Q

Where is fat depth measured

A

6.5cm off dorsal midline where last rib joins

P2 has smallest error

17
Q

How can you control high back fat

A
Select later maturing
Entire males leaner at slaughter
Maintained good conditions 
Correct diet
Prevent separation of diet
Good feed quality
18
Q

What causesPSE

A

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

19
Q

What causes boar taint

A

Androsterone
Skatole
Indole

20
Q

What reduces boar taint

A

Castration

Slaughter before 24w

21
Q

How to prevent tail biting

A

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

22
Q

Causes of tail biting

A

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