Flashcards in Reproductive Management of Sheep and Goats Deck (41)
Are small ruminants seasonal or non-seasonal breeders?
Seasonal (breed in fall, lamb in spring)
What is the ideal breeding season length?
35d (2 full estrous cycles)
What should a BCS be at the start of breeding season?
What should ewe lambs weigh before breeding?
70% of mature weight
What is the estrus cycle length for a sheep?
What is the estrus cycle length for a goat?
What is gestation length for a sheep?
What is the gestation length for a goat?
What is a difference between sheep and goat pregnancy maintenance?
Sheep do not depend on CL after 75d gestation
The placenta of which small ruminant produces progesterone to maintain the pregnancy?
PGF2a is less successful in causing abortion in which small ruminant?
When can you ultrasound dx the number of lambs a ewe is carrying?
Why is quantification of fetuses important for sheep and goats?
Feed management depends on # of fetuses to prevent pregnancy toxemia
When should you booster clostridial and tetanus vaccines in small ruminants?
1mo prior to lambing
Which clostridial agents are you vaccinating against pre-partum?
C. perfringens type C and D
What BCS should an ewe be at lambing?
What is pregnancy toxemia?
Late gestation ketosis assoc. w/extreme glucose pull of fetus
In which animals is pregnancy toxemia most common?
Does/ewes with multiple fetuses
How does small ruminant pregnancy toxemia differ from cattle pregnancy toxemia?
Occurs pre-partum (cows occurs post-partum)
What is the recommended amount of colostrum consumption for small ruminants?
10-20% BW before 18-24h
When do goats reach puberty?
What type of seasonality are sheep and goats?
What is used for estrus synchronization in sheep and goats?
What is the dominant hormone of estrus?
Estradiol (no progresterone priming)
What is the duration of estrus in goats?
12-24h (up to 36h)
When is ovulation in sheep and goats?
Near end of estrus
Why is the testicular size of a goat so large compared to its body?
Very concentrated semen w/small volume ejaculate
How long is diestrus in a goat?
What is the duration of estrus in a sheep?