You have found the sheep study Questions-- Good Luck

-  T or F Stress is always a negative factor in sheep breeding operations and can never be beneficial.

--  What three factors effect the production of sperm by a ram?

--  Name three causes for the decline in the sheep industry.

--  What two management tools can be applied to improve the genetic performance of the flock?

--  Name three factors that affect breeding activity of ewes.

--  What is flushing and why is it used?

--  What are four factors to avoid when selecting ewes to include in your next breeding season?

--  You are wanting to start your own sheep flock. What are the advantages and disadvantages of buying a truck load (400 head) of Culled Ewes over Purebred Ewe Lambs?

--  T or F Wool is a major product of the sheep industry in the U.S.

--  What are the advantages to pasture breeding? the disadvantages?

--  Why are sheep a desirable resource in underdeveloped countries?

--  In Dr. Keisler's sheep research, he uses one of the most potent stimulators of appetite known as ___________

--  _______________ is a genetic tool for flock improvement.

--  Sheep closer to the equator exhibit less seasonal variation in breeding activity. Why?

--  During late gestation, why is it necessary to increase the amount of grain you feed to ewes?

--  Give an example of why genetic mutations are not necessarily a bad thing.

--  Why did sheep numbers in the U.S. increase during World War 2?

--  Define the term heritability?

--  What are the four ways to modify the breeding activity of ewes?

--  What are some of the factors that determine rate and value of improvements that occur within a flock?

--  Why would flushing be a beneficial technique to use in a ewe breeding scheme?

--  What is a general rule of thumb for the amount of feed a ewe should consume during late gestation? A) 3% B) 10% C) 6% D) 18%

--  Present 2 ways of starting a sheep operation and the advantages and disadvantages of each approach.

--  What are the benefits of a dual-purpose breed?

--  Define the term lamb?

--  Why are wrinkles be an undesirable trait in the sheep industry?

--  Why is the quality of the wool produced by the Merino more highly desired than the wool produced by other breeds of sheep?

--  At what age does an ewe lamb become sexually reproductive, how long is their estrus cycle, and what is the length of an ewe lamb gestation?

--  Is it more practical to use hand mating or pasture mating? Why?

--  What is hybrid vigor and how do you achieve it?

--  Why were sheep domesticated?

--  How has the sheep population and distribution changed in the US over the last century?

--  T/F Heterosis is defined as the offspring doing better than the average of both parents.

--  As the number of traits being selected for goes up, what must happen to selection pressure?

--  What is the biggest reason for increasing feed intake?

--  Why is not a good idea to eliminate all genetic mutations?

--  Through what mechanisms does an animal perceive body composition and why is this of importance to a producer?

--  Explain the advantage of buying feeder lambs for your first endeavor into the sheep industry.

--  What confounding effects are associated with a superior environment when selecting a genetically superior animal?

--  Ewes can be selected by many different features, which of the following can you use to select a ewe? a)Mothering Ability, b) Large Ewes, c) Uniform wool with no black fibers, d) All of the above

--  T/F A dry ewe will eat approximately 10% of her body weight.

--  T/F The growth of lambs up to 90 days is primarily influenced by the amount of grain and hay they eat.

--  A new gene has been discovered in the sheep industry which causes the males to express a double muscling condition. This gene or trait is called _________________________

--  Describe the relationship between day length and % ewes in estrus?

--  In "ideal " conditions, how many ewes out of 100 will remain open after a 60-day breeding season?

--  Why can it be difficult to improve the performance of sheep through selection efforts?

--  For the "ram introduction" technique to be successful in a flock of ewes this requires that the ewes not have exposure to  _______, _______ and _______ of the ram for approximately _____ days.

--  Why are there so many breeds of sheep?

--  During which season of the year does wool grow most and why?

--  When selecting replacement ewe lambs to include in your future breeding flock, why is it best not to make this decision based simply on visual appraisial of the animal??

--  What are the advantages and disadvantages of early weaning?

--  During early gestation, ewes should be fed approximately ___ - ___ percent crude protein.

--  The most effective time to nutritionally "flush" ewes is during the _________________ period, which is defined as what?

--  If a sheep producer in North America bought 100 ewe lambs from a producer in South America, how long will it take for the ewes' estrus cycle to adjust?

--  Name an advantage and a disadvantage to weaning a lamb at 16 weeks.

--  Name three variables effecting the breeding performance of a ewe lamb.

--  How many ewes can a yearly ram cover in an open pasture in breeding season?

--  T or F When introducing strange rams, you should be sure to have a large area so that they both have plenty of space

--  What is the basic rule when determining how many rams should be placed in one pasture of ewes?

--  What percentage of ewes will conceive the first time they are mated?

--  Why are there fewer ewe lambs actually used for replacements than the "ideal" or recommended percentage of replacements?

--  When is it most influential to use the management practice of nutritional "flushing"?

--  What are the estrus and gestation lengths of sheep?

--  Why do sheep only cycle seasonaly?

--  Under what circumstances would it be economical to sell more than the recommended percentage of ewe lambs?

--  T/F Down breeds have a shorter breeding season than Spanish breeds.

--  How does a small amount of copper effect sheep?

--  Approximately what percent protein is needed in a creep ration of a young lamb?

--  How many pairs of chromosomes are found in normal sheep?

--  What would be considered an ideal ram to ewe ratio in a pasture system for a herd of 25 sheep?

--  What is the one most critical limitations which holds back the sheep industry in today's market and give the reason why?

--  Describe the activity of leptin in the obese animal and its affects on appetite and reproduction.

--  What is the influence of temperature on breeding?

--  Why are there more sheep in the developing countries than in the U.S.

--  Compare and contrast the plus and minus side of buying a $5,000 ram or 10 $500 rams.

--  What is the most advisable approach to treating pregnant ewes with ketosis ?

--  List two important criteria for the transportation and/or introduction of a ram. Explain why each is important.

--  The first mating of 100 ewes would result in approx. ____ ewes pregnant.

--  Explain why a producer would choose to practice early weaning.

--  T/F Average age of puberty is usually 32-34 weeks.

--  When speaking of different mating systems, what are the advantages and disadvantages of the PASTURE MATING SYSTEM?

--  Name 3 potential sources of production losses.

--  Explain 2 advantages and two disadvantages to using A.I.

--  What is VFA?

--  What is the highest percent moisture hay can be and not mold? A) 2% b) 5% c) 16% d) 20%

--  T/F Spanish breeds of sheep have a shorter breeding season than British breeds of sheep.

--  What is the importance of a large scrotal circumference on a ram to his progeny?

--  What are the advantages of using a crossbreeding system of mating?

--  What does prolificacy refer to when talking about desirable traits of sheep?

--  What are the three mating systems?

--  What animal is the most efficient in terms of pounds gained per pound intake?

--  In the U.S. there are _______________(number) facilities that kill 90% of all of the lambs that are produced in the U.S.

--  What breed of sheep may be refered to as a "litter-bearing species"?

--  At what time point post-lambing does milk production peak?

--  What is the disease condition that causes ewe's udders to turn blue and sluff off?

--  Why do sheep producers dock lambs tails?

--  What one breed of sheep, of the original breeds of sheep that contributed nothing to the current day breeds of sheep??