Quiz III

Question 1

Define creep feeding

Answer 1

Used as a supplementation for the mother’s milk. A pen designed where lambs can enter an eat a creep feed ration, but ewes cannot enter

Question 2

How long is estrus in the ewe?

Answer 2

20-42 hours

Question 3

How long is the estrous period in the ewe?

Answer 3

20-42 hours

Question 4

How long is the estrous cycle in the ewe?

Answer 4

16-17 days

Question 5

How long is the gestation length in ewes?

Answer 5

147 days

Question 6

Define heterosis

Answer 6

Increase vigor or vitality of crossbreds as compared to average of parental breeds

Question 7

Why do you need to adjust factors based on age group?

Answer 7

Sheep are at peak production at 3-6 yr
1-2 yr old are immature and have not reached peak production
>6 yr olds have passed peak production

Question 8

3 main causes of sheep number decline

Answer 8

1. Foot rot
2. Internal parasites
3. Predators

Question 9

Stomach worm resides in the _____ of the sheep

Answer 9

Abomasum of the sheep

Question 10

You can never rid sheep completely free of _____ in state of KY

Answer 10

Stomach worm

Question 11

Stomach worm is a _____, while the tapeworm is a _____

Answer 11

Tapeworm - nutrient robber/lives off feedstuff in abomasum

Stomach worm - blood sucker

Question 12

Main symptoms of stomach worm

Answer 12

Anemia and Edema (bottle jaw)

Question 13

FAMACHA Score goes from ____ to ____

Answer 13

1-5 (5 is really dangerous - pale/white)

Question 14

What drenchers (dewormers) can we use? Commerical and not

Answer 14

*Copper sulfate
*Cydectin
*Ivermectin
Panacure
Tramasol
Albasin

Question 15

How to manage/control stomach worm?

Answer 15

Pasture rotation (Should let a pasture grow back 28-30d)

Question 16

Breeding Soundness Exam (BSE) has five components

Answer 16

1. Examination
2. Palpation
3. Semen Evaluation
4. Overall rating
5. Interpretation

Question 17

What is BSE?

Answer 17

An evaluation of potential ability of a male to impregnate a given # of females within a defined mating period and gives a rating for just 1 particular point in time.

Question 18

Rams 8-14mo old should have a scrotal circumference of _____ to be considered exceptional.

Answer 18

> 36 cm

Question 19

Rams > 14mo old should have a scrotal circumference of _____ to be considered exceptional.

Answer 19

> 40 cm

Question 20

Body condition score goes from ____ to ____

Answer 20

1-5

5 - overconditioned

Question 21

What % motility is considered exceptional? Questionable?

Answer 21

70-100% is exceptional

10-30% is questionable

Question 22

Questionable males may breed to _____ or _____.

Answer 22

Limited number of ewes under limited conditions

Retest in 30-60 days

Question 23

Satisfactory males will be able to impregnate at least _____ ewes in a _____ day period.

Answer 23

50 ewes in a 34-d breeding period

Question 24

Exceptional males will be able to impregnate at least _____ ewes in a _____ day period.

Answer 24

100 ewes in a 34-d breeding period

Question 25

Female sheep reach maturity at _____

Answer 25

5-8 mo

Question 26

Female should be at least _____ before mating

Answer 26

7-8 mo

Question 27

What is the estrous period?

Answer 27

Heat. Length of time when a ewe will accept the ram. Ranges from 20-42 hrs (avg 30-35h)

Question 28

What is the estrous cycle?

Answer 28

16-17d period (from beginning of one heat to the beginning of another)

Question 29

Ovulation occurs during the _____ of the estrous PERIOD

Answer 29

Last 6-10 hrs of heat

Question 30

KY ewes are typically bred in

Answer 30

Aug/Sept

Question 31

Progesterone performs 4 functions during pregnancy:

Answer 31

1. Keeps ewe from exhibiting heat 2. Reduces LH production 3. Keeps the ewe pregnant 4. Stimulates mammary development

Question 32

What is seasonally polyestrus?

Answer 32

Ewes will exhibit recurring estrous cycles if no conception occurs, but only during certain seasons of the year.

Question 33

Normal mating season for ewes in KY is in the _____

Answer 33

Fall (Oct, Nov)

Question 34

What is the biggest reproductive problem in ewes?

Answer 34

Seasonal anestrus

Question 35

4 Factors that affect sexual activity in ewes

Answer 35

1. Daylight (Max sex activity occurs when daylight is 10-12 hr/d) 2. Temperature (avg 74 F) 3. Relative humidity (Less humidity the better) 4. Nutritional flushing (Increases ovulation rate)