Flashcards in Sheep and Goat Reproduction Deck (168)
What species are the earliest domesticated animals?
Sheep and goats
What are 4 things to consider with reproductive management of goats?
Purpose of the farm
Time to achieve goal
What type of kidding do you want if the purpose of your farm is dairy?
Year round kidding for constant supply
What are 5 breeds of dairy goat?
What type of kidding do you want if the purpose of your farm is meat?
How long do you keep a buck with the does to get a uniform kid crop?
32 days (1.5 cycles)
What are 5 breeds of meat goat?
Tennessee stiff-leged (fainting goats)
What are 2 breeds of fiber goat?
What are the 4 types of production in sheep?
What do you look for when selecting for increased reproduction?
Select for twins and triplets.
What body weight do you want a sheep or goat to reach before they enter the breeding herd?
60-70% of their adult weight
When do sheep and goats reach puberty?
5-15 months (>60% adult body weight)
What factors affect sheep and goats reaching puberty?
Time of lambing
How long can you typically keep a ewe or doe in your breeding herd?
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)
How long is the estrous cycle in the ewe?
How long is the estrous cycle in the doe?
Which species has CL dependent production of Progesterone?
And goats and sheep short or long-day breeders?
How does day-length affect cyclicity?
Increasing darkness increases melatonin from the pineal gland, which increases GnRH from the hypothalamus which releases LH.
What does estrus in the doe look like?
Tail wagging, bleating, restlessness, pacing and vulvar swelling.
What does estrus in the ewe look like?
Vulvar swelling, anorexia.
When do you put vasectomized teaser rams out with the ewes?
14 days prior
What is flushing?
20-30 % increase in nutrient uptake 2-3 weeks prior to breeding.
When would you flush a ram?
8 weeks prior to breeding
What 2 things can be done to manipulate reproduction in a doe or ewe when they are in anestrus?
Manipulation of lights to increase darkness.
NOTE: will through all you've got at these ladies.
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.
When the does and ewes are in a transitional period, what 2 things can be done to manipulate reproduction?
Buck or Ram Effect
When the doe or ewe is cycling, what 2 things can you do to manipulate reproduction?