Sheep (Leaving Cert Agricultural Science): Flashcards

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Sheep
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Wether

Castrated male sheep raised for meat production

Terminal sire

Ram producing fast-growing offspring for slaughter

Cast/draft ewe

Older ewe with declining fertility sold from mountain to lowland farms

Two mountain sheep breeds in Ireland

Blackface Mountain and Wicklow Cheviot

Ireland's only native sheep breed

Galway Sheep

Two terminal sire breeds

Suffolk and Texel

Body Condition Score (BCS) for ewes at mating

3.5

Prolificacy formula

Lambs rearedEwes mated\frac{\text{Lambs reared}}{\text{Ewes mated}}

Grey-face sheep

Crossbred offspring of cast ewes & prolific rams

Key benefit of crossbreeding in lowland systems

Hybrid vigour (crossbreds outperform purebreds)

Ewe

Adult female sheep for breeding and milk production

Terminal sire

Ram producing fast-growing offspring for slaughter

Gestation period in sheep (days)

147 days

Oestrous cycle length (days)

17 days

Colostrum importance

Provides antibodies protecting lamb from disease

Prolificacy formula

Lambs reared ÷ ewes mated

Kill out percentage formula

(Carcase weight ÷ live weight) × 100

BCS for ewes at mating

3.5

Hybrid vigour

Crossbreds outperform purebred parents in productivity

Ireland's native sheep breed

Galway Sheep

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