Sheep and Goat Reproduction Flashcards Preview

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Flashcards in Sheep and Goat Reproduction Deck (168)
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1

What species are the earliest domesticated animals?

Sheep and goats

2

What are 4 things to consider with reproductive management of goats?

Purpose of the farm
Farm capabilities
Animal capabilities
Time to achieve goal

3

What type of kidding do you want if the purpose of your farm is dairy?

Year round kidding for constant supply

4

What are 5 breeds of dairy goat?

Nubian
Toggenburg
Alpine
Lamancha
Saanan

5

What type of kidding do you want if the purpose of your farm is meat?

Controlled kidding

6

How long do you keep a buck with the does to get a uniform kid crop?

32 days (1.5 cycles)

7

What are 5 breeds of meat goat?

Boer
Kiko
Pygmy
Tennessee stiff-leged (fainting goats)
Spanish

8

What are 2 breeds of fiber goat?

Angora
Cashmere

9

What are the 4 types of production in sheep?

Meat
Wool
Milk
Pet

10

What do you look for when selecting for increased reproduction?

Select for twins and triplets.

11

What body weight do you want a sheep or goat to reach before they enter the breeding herd?

60-70% of their adult weight

12

When do sheep and goats reach puberty?

5-15 months (>60% adult body weight)

13

What factors affect sheep and goats reaching puberty?

Time of lambing
Nutrition
Ram selection

14

How long can you typically keep a ewe or doe in your breeding herd?

3-6 years

15

What do you want to watch for in ewes and does to determine drop in production?

Decrease in number of babies (eg. usually has triplets now having twins)

16

How long is the estrous cycle in the ewe?

17 days

17

How long is the estrous cycle in the doe?

21 days

18

Which species has CL dependent production of Progesterone?

The goat

19

And goats and sheep short or long-day breeders?

Short-day breeders

20

How does day-length affect cyclicity?

Increasing darkness increases melatonin from the pineal gland, which increases GnRH from the hypothalamus which releases LH.

21

What does estrus in the doe look like?

Tail wagging, bleating, restlessness, pacing and vulvar swelling.

22

What does estrus in the ewe look like?

Vulvar swelling, anorexia.

23

When do you put vasectomized teaser rams out with the ewes?

14 days prior

24

What is flushing?

20-30 % increase in nutrient uptake 2-3 weeks prior to breeding.

25

When would you flush a ram?

8 weeks prior to breeding

26

What 2 things can be done to manipulate reproduction in a doe or ewe when they are in anestrus?

Hormonal manipulation
Manipulation of lights to increase darkness.

NOTE: will through all you've got at these ladies.

27

What is the "Buck or Ram effect"?

Remove sight, sound and smell of the males for at least 30 days. Once the females have gone through the transition period, then reintroduce the males. Females will go into heat like crazy.

Note: Will usually have a silent heat.

28

When the does and ewes are in a transitional period, what 2 things can be done to manipulate reproduction?

Buck or Ram Effect
Hormonal manipulation

29

When the doe or ewe is cycling, what 2 things can you do to manipulate reproduction?

Prostaglandins
Hormonal manipulation

30

What is a CIDR and how long can it be used?

Intravaginal implant of progesterone. Can be used for 12-14 days.

NOTE: Cows can use for 5-7 days.