ASG 4992
Mid term – Spring 1998
100 points possible
General Information (45)
1.
Explain the importance of evaluating the meat animal species for fat,
muscle, volume and structural soundness. (10)
2.
Discuss the effects that frame size has on fat deposition. Be sure to
include both large and small framed animals. (5)
3.
Name four sites that can be used to evaluate for fat deposition. (2)
4.
Name four sites that can be used to evaluate for muscling. (2)
5.
Name two sites that can be used to evaluate for volume and capacity. (1)
6.
Briefly describe the desirable skeletal structure of livestock. (2)
7.
“EPD” is an acronym for what? Define the concept of EPD. (1)
8.
When an individual animal’s weight is said to be “adjusted”, what does this
mean? (1)
9.
Define the following terms relative to what species they are used in, what
they indicate and give the units for which they are measured in. (10)
a.
Birth Weight EPD:
b.
Weaning Weight EPD:
c.
Milk EPD:
d.
Number Born Alive EPD:
e.
Days to 230 EPD:
f.
Sow Productivity Index:
g.
60 Day Weight EPD:
h.
Grease Weight EPD:
i.
Pounds of Lamb Weaned EPD:
j.
Terminal Sire Index:
10.
Diagram the format in which reasons are presented. Include where
grants, criticisms, advantages are discussed. (5)
11.
Name three disadvantages and three advantages to Continental breeds of
cattle. (6)
12.
Name two black face and two white face breeds of sheep. Be sure to
denote which is which. (4)
13.
Score the following placings. (3)
Official:
1-2-3-4
cuts of:
a.
1-3-2-4:
b.
1-4-3-2:
c.
4-1-2-3:
BONUS: 2 points extra credit
5-3-2
4-3-1-2
Scenarios: Read the following scenarios and data. Answer the following
questions. (12)
POLLED HEREFORD BULLS (4)
NO.
ACT.
ADJ.
ADJ.
BW
WW
YW
1
92
660
1174
2
87
595
1065
3
93
733
1124
4
107
688
1359
Breed average EPD’s
BW
EPD
7.8
1.0
4.7
10.4
3.5
WW
EPD
38.5
24.1
38.3
37.9
33.0
YW
EPD
68.7
41.9
46.0
75.5
43.0
MILK
EPD
-3.5
4.0
8.0
-0.7
5.0
The selected bull will be used on a set of mature Angus cows. Castrated male
offspring will be retained and finished in a commercial feedlot. The heifer mates
will be retained and returned to the mature black baldy cowherd. The nutritional
program for the cowherd is considered above average, but limited labor is
available at calving.
A.
Which bull best fits the scenario given?
__________
B.
Which bull offers the most post weaning growth?
__________
C.
Which bull should create the least amount of dystocia?
__________
D.
Which bull should produce the heaviest milking daughters? __________
YORKSHIRE GILTS (4)
NO.
BF
EPD
1
.00
2
-.02
3
-.03
4
-.01
DAYS
EPD
-0.8
-2.8
-3.4
-1.2
ACTUAL
BORN/WEAN
9/9
11/9
12/11
11/10
DAM’S
SPI
102
105
105
99
Gilts will be mated to Hampshire boars. All offspring will be fed out and sold on a
grade and yield basis. All hogs will be raised in confinement.
A.
Which gilt best fits the scenario?
B.
Which gilt is least likely to make a positive impact on the marketability of
the offspring on a grade and yield basis?
C.
Between 2 and 4, whose offspring should be the faster growing, leaner
feeder pigs?
D.
What selection traits are of economic importance in this scenario (list all
that apply)?
Suffolk Ewes (4)
NO.
DOB
1
2
3
4
1/13
1/16
2/15
2/17
60 Day
EPD
1.2
.6
.3
1.4
Milk
EPD
.4
-1.0
.6
.5
120 Day
EPD
2.6
1.6
.6
3.3
% Lamb
Crop EPD
2
1
3
8
Rank these ewes as replacements in a purebred flock which markets commercial
rams to flocks that raise their own replacements and finish their own market
lambs.
A.
Which ewe best fits the scenario?
B.
Which two ewes should have the lightest lambs at weaning?
C.
Which ewe should have the most desirable impact on lambing
percentage?
D.
Assign a placing to this class.