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Food And Labor PowerPoint Presentation

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Food And Labor Presentation Transcript

Slide 1 - Food and Labor Bos indicus type cows in Brazil. Where do these types of cows usually live? Why do they look so different?
Slide 2 - Food and Labor First bovine was domesticated 10,500 years ago in SE Turkey. All domestic cattle today are descendants of only 80 tamed wild oxen called Aurochs. Bollongio et al.Modern Taurine Cattle descended from small number of Near-Eastern founders. Molecular Biology and Evolution. 2012
Slide 3 - Auroch Extinct-the last female died in Poland in 1627 Restorative drawing from a skeleton found in Germany Painting in Lascaux cave in France-17,300 years ago
Slide 4 - Food and Labor Equines: Equus ferus caballus
Slide 5 - Food and Labor Horses started to be domesticated 4000-3000 BCE. (6000-5000 years ago) Scientists don’t really know the exact ancestor. Only 1 truly wild horse exists. They were probably first used for meat and then for work and transportation.
Slide 6 - Food and Labor The Eurasia steppe is the only place that horses survived after the last Ice Age.
Slide 7 - Food and Labor 5000 year old cart drawing found in today’s Iraq.
Slide 8 - Food and Labor Equines: Equus ferus przewalskii The only true wild horse left. Przewalskii’s horse is endangered and may be a completely different species anyway.
Slide 9 - Food and Labor Mustangs are not wild horses. They are… Feral: originated from domestic animals
Slide 10 - De-extinction Some people are trying to “breed back” an extinct species. It’s like the reverse of domestication. Selecting for wild traits from original ancestor. The Tarpan was a wild horse that went extinct in 1910. These are Heck horses…very similar Their coat turns more white in winter. The Nazis starting the rebreeding program.
Slide 11 - De-extinction The last Ibex, a type of goat, went extinct in 2000 as scientists tried to collect the DNA from the last one named, Celia. Since 2003 Celia’s DNA has been used in a cloning project in an attempt to “de-extinct" the species. In 2009, it worked! But the baby only lived 7 minutes after birth.
Slide 12 - De-extinction Artist rendition of Auroch Spanish fighting bull
Slide 13 - Create a chart for domestication: Domestic Animal Wild Ancestor Where? When? How? Why? Dog Cat Chicken Sheep Cattle Horses There will be a quiz on the chart…on THURSDAY.
Slide 14 - Effects of Domestication After animals become domesticated, they become dependent upon man. What changed? Why?
Slide 15 - BECAUSE WE CREATED MONSTERS!!!
Slide 16 - We created monsters!! Wild sheep shed most of their wool in summer… Feral Soay Sheep off the coast of Scotland. They are close the ancient breeds.
Slide 17 - We created monsters!! Domestic sheep have been bred to produce a lot of quality wool and it never stops growing… So humans have to shear sheep usually once per year or…
Slide 18 - ppt slide no 18 content not found
Slide 19 - We created monsters!! “Shrek” was a Merino sheep that lived in New Zealand. He avoided being shorn by hiding in a cave for six years! When they did find him, he wasn’t recognizable. They thought maybe some strange thing was eating this sheep. When they sheared him, the amount of wool was enough to make 20 men’s suits, 60lbs of wool!
Slide 20 - We created monsters!!
Slide 21 - We created monsters!!
Slide 22 - We created monsters!! Cows (Holsteins) average about 9 gallons of milk a day, while lactating. The record in 2010 was set by a cow that made almost 30 gallons/day.
Slide 23 - We created monsters!! Modern chickens produce 250 eggs/year versus 20 in wild species.
Slide 24 - We created monsters They are bred for size which makes them incapable of flight. They are too heavy. They also can’t breed naturally because the males chest is so big. Some species have their wings clipped at birth. Ducks and Geese Most poultry can not fly, but why?
Slide 25 - We created monsters Some species have their wings clipped at birth. Ducks and Geese Most poultry can not fly, but why?
Slide 26 - How do animals help us? Food Fiber Labor Medicine/Research Pets/Companionship
 

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