Reproductive Management of Sheep and Goats Flashcards Preview

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Flashcards in Reproductive Management of Sheep and Goats Deck (41)
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1

Are small ruminants seasonal or non-seasonal breeders?

Seasonal (breed in fall, lamb in spring)

2

What is the ideal breeding season length?

35d (2 full estrous cycles)

3

What should a BCS be at the start of breeding season?

2.5-3.5

4

What should ewe lambs weigh before breeding?

70% of mature weight

5

What is the estrus cycle length for a sheep?

17d

6

What is the estrus cycle length for a goat?

21d

7

What is gestation length for a sheep?

145-147d

8

What is the gestation length for a goat?

150-151d

9

What is a difference between sheep and goat pregnancy maintenance?

Sheep do not depend on CL after 75d gestation

10

The placenta of which small ruminant produces progesterone to maintain the pregnancy?

Sheep

11

PGF2a is less successful in causing abortion in which small ruminant?

Sheep

12

When can you ultrasound dx the number of lambs a ewe is carrying?

45-60d

13

Why is quantification of fetuses important for sheep and goats?

Feed management depends on # of fetuses to prevent pregnancy toxemia

14

When should you booster clostridial and tetanus vaccines in small ruminants?

1mo prior to lambing

15

Which clostridial agents are you vaccinating against pre-partum?

C. perfringens type C and D

16

What BCS should an ewe be at lambing?

3-3.5

17

What is pregnancy toxemia?

Late gestation ketosis assoc. w/extreme glucose pull of fetus

18

In which animals is pregnancy toxemia most common?

Does/ewes with multiple fetuses

19

How does small ruminant pregnancy toxemia differ from cattle pregnancy toxemia?

Occurs pre-partum (cows occurs post-partum)

20

What is the recommended amount of colostrum consumption for small ruminants?

10-20% BW before 18-24h

21

When do goats reach puberty?

6-8mo

22

What type of seasonality are sheep and goats?

Short-day breeders

23

What is used for estrus synchronization in sheep and goats?

CIDR

24

What is the dominant hormone of estrus?

Estradiol (no progresterone priming)

25

What is the duration of estrus in goats?

12-24h (up to 36h)

26

When is ovulation in sheep and goats?

Near end of estrus

27

Why is the testicular size of a goat so large compared to its body?

Very concentrated semen w/small volume ejaculate

28

How long is diestrus in a goat?

18d

29

What is the duration of estrus in a sheep?

24-36h

30

What is required for the expression of estrus in sheep?

Progesterone priming