AVS 209 Quiz Flashcards Preview

AVS > AVS 209 Quiz > Flashcards

Flashcards in AVS 209 Quiz Deck (60)
Loading flashcards...
1

Which of the following have contributed to declining sheep numbers in the US
a. are larger
b. have fewer disease outbreaks
c. have lower lambing rates
d. have less investment in facilities
e. less demand for wool
f. declining lamb consumption
g. competition for range lands
h. inability of rams to successfully breed ewes
I. increase in wolves

ABCDEFGI

2

Which are recommended management a few weeks before or shortly after lambing?
a. open teats, or strip ewe
b. clip and iodine naval of lamb
c. vaccinate new born lambs for entertoxemia
d. ensure lambs get colostrum shortly after birth

ABD
C should be newborns

3

With regard to sheep production
a. Austrailia has the largest sheep population of any country
b. lamb supply in the US has increased from domestic production in the last decade
c. sheep numbers in the US have declined from 56 million to 6 million since 1942
d. Idaho is in the top 10 sheep producing states in the US and Texas is the largest producer
e. lamb meat supply in the US has been maintained by increasing imports

CDE
a= china
b= decreased?

4

The estrous cycle of an ewe is approximately ______ days. If she becomes pregnant, normal gestation length is about _______ days. While the average lambing rate is 1.3 lambs per ewe, an ideal lambing rate would be ____ lambs per ewe, because _____________________________________________________ (provide brief rationale)

17
150
2
introducing lambs to a higher quality feed before going to production

5

Sheep are seasonal breeders, and are considered (long or short) ___________ day breeders, although the use of reproductive technology now allows most sheep to be fertile "out of season"

Short

6

Prior to breeding, the common practice of increasing a ewe's plane of nutrition to stimulate estrus and increase ovulation rate is known as __________. Provide a scenario when a producer may be motivated to use this management practice: ______________________

flushing
increase lamb crop

7

A mature ram should be expected to breed approximately _____ ewes

30

8

Provide one reason why a ewe may be culled prior to the breeding season

she is not a high producer
?

9

What is a typical weight range for newborn lambs and why is this trait highly variable?

8-15lbs, its variable because ewes can have singles, twins, triplets, ect...

10

Provide an example of a hair sheep breed, and state two production situations where it may be beneficial to use hair sheep

barbadous- when you cant shear the sheep
in a hotter climate

11

Fine wool breeds of sheep include
a. merino
b. dorper
c. rambouillet
d. Lincoln
e. Barbados blackbelly

AC

possibly B????

12

Meat and sire breeds of sheep include
a. Suffolk
b. Yorkshire
c. Hampshire
d. dorset
e. Berkshire

ACD

13

Wool value and/or utility is improved by
a. larger fiber diameter
b. black fibers
c. skirting the fleece
d. feeding a diet with less than 8% protein

C

14

Compared with farm-flock sheep production, range flocks typically
a. are larger
b. have fewer disease problems
c. have lower lambing rates
d. shear sheep more frequently
e. have more complete production records
f. have less invested in facilities
g. have higher death loss during lambing
h. availability of reliable herders/sheperds

ABCFGH

15

Feedlot Steers
a. gain weight faster than heifers
b. typically gain more than 3 pounds a day
c. require more feed per pound of gain than heifers
d. are easier to manage than bulls

ABD

16

Feedlot diets
a. are high energy and can cause acidosis, but this problem is minimized by feeding of ionophores
b. often contain non-protein nitrogen such as urea, or other protein supplementation
c. typically contain both grain and roughage
d. may contain optaflexx or zilmax near the end of the finishing period

ABCD

17

Growth promoting implants, which at placed in the ears of cattle, often contain a combination of estrogenic and androgenic steroid hormones, and these are commonly used by the US feedlot industry to increase average daily gain and improve efficiency of cattle

True

18

A mature Suffolk ewe may weigh over 250 lbs, and typical market lambs weigh about 140 lbs

true

19

Sheep's milk is sometimes used for cheese production, and since it has about 18% milk solids non fat, a pound of sheep's milk will produce about twice as much cheese as a pound of cow's milk

true

20

_________ by-products are a major source of economical feed for feedlot cattle in the Northwest US and these by products are not commonly fed in the Midwest

potatoe

21

Sheep are seasonal breeders, and are considered _______ day breeders. A meat breed of sheep known for out of season breeding is the __________

short
dorset

22

Barbados blackbelly, St. Croix, and Dorper breeds are classified as ________ sheep and are not typically sheared.

hair

23

Why is the plan to rebuild US sheep industry called the 2+2+2= rebuild plan?

Increase ewes in flock by 2%, 2 lambs per ewe, increase number of lambs harvested by 2%

24

Desirable characteristics of breeding livestock include
a. adequate flex to the pasterns
b. spring of rib
c. above average EPD's for growth and birthing ease
d. long, wide, and level rump structure

ABCD

25

Indicators of muscularity in livestock include
a. fullness of jowl or brisket
b. width of leg placement
c. depth of flank
d. thickness in the forearm and from stifle to stifle
e. depth of jowl or brisket
f. uniformity of toe size
g. thickness of hind leg

BDG

26

During breeding female selection
a. gilts with blind or inverted nipples should be culled
b. animals with too little angle in their joints should be culled before animals with too much flex
c. an infantile vulva may indicate an underdeveloped reproductive tract
d. structural correctness is the most important indicator of longevity

ABCD

27

Priority traits for visual evaluation of breeding livestock include:
a. dentition to determine animal age
b. hock angle and flexibility
c. depth of body and width of chest
d. reproductive tract development

BCD

28

What is meant by balance in breeding animals, and why is balance important?

balance in breeding animals is when the animal looks proportionate to itself. It is important because looks help sell.

29

Describe two characteristics of an ideal foot (below pasterns) for a gilt, ewe, or cow.

large feet to balance on (small feet wear down)
large spacing between the toes (equal balance between toes)

30

For each animal in the photographs, state two desirable or two undesirable characteristics

undesirable no movement in the stifle
undesirable little bend in the pasterns

flat back desirable
wide through the shoulder desirable