Reproductive data Flashcards
1
Q
Dogs (breeding)
A
Puberty around 1 year
9 day oestrus
3mo anoestrus (sexual inactivity between oestrus periods), 2mo metoestrus (lack of sexual activity), 1-2w pro-oestrus
2
Q
Long day breeders
A
Hamsters
3
Q
Short day breeders
A
Sheep, goats, horses
4
Q
Seasonal breeders
A
Sheep, goats, horses
5
Q
Non-seasonal breeders
A
Cattle, pigs, poultry
6
Q
Pigs reproductive data
A
Length of oestrus = 48-72 hours
Inter-oestrus interval = 21 days (this is length of oestrus cycle)
Gestation period = 115 days (3 months, 3 weeks, 3 days)
Lactation: 21 -28 days
7
Q
Cow dry period
A
60-80 days
8
Q
Detecting oestrus in cows
A
- Should observe at least 3 times a day.
- Need to observe for longer than 30 mins at a time as there are a range of intermittent behaviours which should be detected.
- Observe when socialising normally (i.e not when milking or in collection yard)
- Ovulation is 10-15 hours after standing oestrus
- Behavioural signs of oestrus is standing to be mounted/mounting the head of another cow (primary) or secondary signs include cajoling, increased activity, chin resting, mounting other cows
- Physiological changes include mucoid vulval discharge (bulling string), swollen vulva and reduced milk yield
9
Q
Interoestrus interval in cows
A
21 days
10
Q
Length of oestrus in cows
A
2-30 hours
11
Q
Gestation period in sheep
A
147 days (5 months)
12
Q
When do ewes reach puberty
A
6-9 months
