Lecture 38 Evolution & Domestication - Livestock Flashcards
Mulesing (3)
-skin is cut away from breech area
-prevents flystrike
-welfare issue
Potential alternatives to mulesing (3)
-selective breeding
-clips
-cytotoxic injections
New Zealand has the
Highest density of sheep per capita
Australia is the world’s largest exporter of
Cattle and sheep
Which sheep is adapted very well to Australia
Merino
Spanish produced ___sheep for quality wool
Merino
Sheep were initially kept for (3)
-meat
-milk
-skins
Selection of woolly sheep began around
6000 years ago
Ancient sheep were (2)
-plucked, not shorn
-hair fibres were used (longer and coarser than wool fibres)
Domestication of sheep was ideal because (5)
-lack of aggression
-manageable size
-early sexual maturity
-social nature
-high reproduction rates
_____ were the first livestock species to be domesticated
Sheep and goats
There are ____ breeds of domesticated sheep
1000
Ovis aries
Domestic sheep
The primary ancestor of domestic sheep is thought to be
Asiatic Mouflon (Ovis orientalis)
Dairy breeds: (3)
-Holstein friesian
-jersey
-guernsey
Beef breeds: (4)
-angus
-Hereford
-Belgian blue
-charolais
Taurus lineage has (2)
-flat back
-more upright ears
Cross of Indicine and Taurine is
Droughtmaster
Cattle ticks transmit
Babesia bovis
Zebu (indicine) lineage (6)
-used mostly for meat
-hump at shoulders
-droopy ears
-heat tolerant
-hardy
-tolerance to parasites & disease
Indian aurochs are the
Zebu cattle
Eurasian Aurochs are
Taurine cattle
Cattle are used for (4)
-meat
-milk
-hide
-manure
All domestic cattle descend from
The wild ox or aurochs (Bos primigenius)
Two species of cattle are
-taurine (Bos taurus)
-zebu (Bos indicus)
Taurine and zebu cattle can
Interbreed
Aurochs site of origin is most likely
India
Three subspecies of aurochs are
-Indian
-Eurasian
-North African
Eurasian aurochs were domesticated into
Modern Taurine cattle breeds
Indian Aurochs were domesticated into the modern
Zebu (Indicine) Cattle
Which Auroch became extinct prior to the Middle Ages
North African Auroch