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Sheep Industry
Exam 3
54
Veterinary Medicine
Undergraduate 1
03/23/2014

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Cards

Term
In 1942, there was a peak of ___ million head of sheep.
Definition
56 million
Term
Most sheep growers have (small/large) flocks of ___ head or less, usually as their (primary/secondary) enterprise.
Definition
Small flocks, 50 head or less, Secondary enterprise
Term
___% of western sheep producers have flocks > 50 head.
Definition
40%
Term
What two states contain the highest number of sheep?
Definition
1) Texas, 2) California
Term
Name 6 valuable properties of wool.
Definition
1) Water resistant, 2) Insulation, 3) Breathable, 4) Elastic, 5) Strong, 6) Felting properties
Term
What are the 3 primary factors that wool is evaluated by?
Definition
1) Condition (Shrink), 2) Grade (Diameter), 3) Staple Length (Fiber Length)
Term
"Character" of wool refers to what?
Definition
Even, distinct crimping and parallel arrangement of fibers.
Term
"Uniformity" of wool refers to what?
Definition
Fiber length and diameter. More uniform fibers require less sorting.
Term
What happens to black fibers?
Definition
They are discounted
Term
What is the U.S. Blood System?
Definition
% Merino
Term
What does the "condition" of wool refer to?
Definition
The % of wool remaining after scouring 45-65% shrink
Term
What does the "grade" of wool refer to?
Definition
The number of Hanks from spinning 1 pound of clean wool. Affected by the diameter of the fiber and its amount of crimp.
Term
Which is shorter: fine wool or coarse wool?
Definition
Fine wool
Term
"Wastiness" of wool refers to what?
Definition
Fraying at the ends of the fibers due to second cuts.
Term
What are the 7 steps of wool production?
Definition
1) Shearing, 2) Tying, 3) Grading, 4) Packaging, 5) Storage, 6) Marketing, 7) Manufacturing
Term
Wool prior to manufacturing which contains lanolin and dirt.
Definition
Grease wool
Term
The process of removing grease from wool.
Definition
Scouring
Term
The greasy substance in wool is called what?
Definition
Lanolin
Term
During manufacturing, wool is dried to ___% moisture.
Definition
15%
Term
Burlap sacks used for storage can hold about ___ fleeces, or ____ to ____ pounds of wool.
Definition
30 fleeces, 225-300 lbs.
Term
Wool has a very (long/short) storage time.
Definition
Long
Term
The process of converting wool into longer, finer fibers used for apparel.
Definition
Worsted Process
Term
The process of converting wool into shorter, thicker fibers to be primarily used in flannels and tweeds.
Definition
Woolen Process
Term
The process of combing and symmetrically aligning fibers.
Definition
Carding
Term
List 4 fine wool breeds.
Definition
1) Merino, 2) Rambouillet, 3) Targhee, 4) Southdown
Term
List 8 medium wool breeds.
Definition
1) Corriedale, 2) Columbia, 3) Romeldale, 4) Dorset, 5) Shropshire, 6) Hampshire, 7) Suffolk, 8) Cheviot
Term
A medium wool breed is __ to __ blood, according to the Blood System.
Definition
1/4 to 1/2
Term
List three long wool breeds.
Definition
1) Romney, 2) Cotswold, 3) Lincoln
Term
An animal produced by crossing a long wool breed with a fine wool breed in order to improve carcass quality and length of wool fiber.
Definition
Crossbreed
Term
A breed classification characterized by coarse, wiry, tough fleece and a fiber length up to 13 inches.
Definition
Carpet breeds
Term
What are two jobs performed by purebred breeders?
Definition
1) Provide seed stock to the commercial lamb producer, 2) Work on providing progressive genetics
Term
What are two jobs performed by commercial lamb producers?
Definition
1) Produce market lambs (if forage/grain is available for finishing), 2) Produce feeder lambs for feedlots
Term
What is the purpose of a commercial feedlot in the sheep industry?
Definition
Add additional weight and finish (fat) appropriate for marketing.
Term
What is the market weight for sheep?
Definition
80-140 lbs (depends on breed)
Term
How long is the estrous cycle in sheep?
Definition
Slightly more than 16 days
Term
How long does estrus last in sheep?
Definition
About 30 hours
Term
How long is gestation in sheep?
Definition
147 days
Term
What schedule do sheep reproduce on?
Definition
Sheep are seasonal breeders (Fall and Winter)
Term
Breeds noted for good reproductive efficiency, wool production, milking ability and longevity. They usually have white faces and fine to medium wool.
Definition
Ewe breeds
Term
Meat type breeds noted for fast growth rate and good carcass characteristics. They typically have black faces.
Definition
Ram breeds
Term
When it comes to digestion, sheep are ______ animals.
Definition
Ruminant
Term
Are sheep grazers or browsers?
Definition
Grazers
Term
Unlike beef and pork, what quality does lamb meat have that makes it difficult to harvest?
Definition
It bruises easily
Term
Lamb meat is high in ____ (long/short) chained fatty acids, which affects its flavor profile.
Definition
Short
Term
What was the primary cause of a dramatic crash in sheep production in the U.S.?
Definition
The usage of mutton in World War II rations
Term
Feeding sheep by-products to cattle resulted in what?
Definition
It is now illegal to feed ruminant by-products to other ruminants.
Term
What are four production limitations in the sheep industry?
Definition
1) Seasonality, 2) Predation, 3) Parasites, 4) Diseases
Term
A disease that occurs in late pregnancy/early lactation, often to ewes carrying triplets. It involves rapid catabolism of body fat and dietary energy deficiency.
Definition
Ketosis ("Pregnancy Disease")
Term
There is a national eradication program to remove what disease from the sheep industry?
Definition
Scrapie
Term
This parasite damages the liver and causes bleeding. The snail is an intermediate host.
Definition
Liver fluke
Term
This parasite sucks the blood of an animal and results in extreme anemia and death without treatment.
Definition
Red Stomach Worm (Haemonchus)
Term
___% of U.S. lamb and mutton consumed is imported.
Definition
37%
Term
The per capita consumption of lamb and mutton in the United States is ____ lb/person.
Definition
0.8 lb/person
Term
What two countries does imported lamb and mutton come from?
Definition
1) Australia, 2) New Zealand
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