Therio Key-Points Table Flashcards
cow age of puberty (months)
8-12 (breed differences)
mare age of puberty (months)
15-24 (seasonal effects)
ewe age of puberty (months)
5-7
sow age of puberty (months)
5-8
bitch age of puberty (months)
6-24
queen age of puberty (months)
5-12
mare type of placenta
diffuse/microcotyledonary
sow type of placenta
diffuse
carnivore placental attachment style vs herbivore
herbivores: epithelio-chorial
carnivores: endothelial-chorial
ie. of domestic species only cat and dog have endothelio-chorial
cow breeding season?
all year
mare breeding season?
april-sept (long day), earlier with lighting
ewe breeding season?
short-day breeders (fall)
sow breeding season?
all year, slight seasonal influence
bitch breeding season?
all year
queen breeding season?
jan-oct
cow type of estrus cycle?
polyestrus
mare type of estrus cycle?
seasonally polyestrus
ewe type of estrus cycle?
seasonally polyestrus
sow type of estrus cycle?
polyestrus
bitch type of estrus cycle?
monoestrus
queen type of estrus cycle?
polyestrus
cow length of estrus cycle?
21d
mare length of estrus cycle?
21d
ewe length of estrus cycle?
17d (range 14-19)
sow length of estrus cycle?
21d
bitch length of estrus cycle?
16-56 weeks
queen length of estrus cycle?
1-3 weeks (if not mated)
cow duration of estrus
12-18 hours
mare duration of estrus
4-7 days
ewe duration of estrus
36 hours
sow duration of estrus
48-72 hours
bitch duration of estrus
5-10 d
queen duration of estrus
3-6 d
which domestic species is an induced ovulator (rather than spontaneous)?
queen
cow time of ovulation
4-16h after estrus
mare time of ovulation
24-48h before end of estrus
ewe time of ovulation
24h after onset of estrus
sow time of ovulation
24-42h after onset of estrus
bitch time of ovulation
6d before diestrus
queen time of ovulation
25-50h after coitus
cow ovulation rate (# of ova)
1
mare ovulation rate (# of ova)
1-3
ewe ovulation rate (# of ova)
1-5
sow ovulation rate (# of ova)
10-20
bitch ovulation rate (# of ova)
3-20
queen ovulation rate (# of ova)
1-12
cow transit time of ovum in oviduct (days)
5
mare transit time of ovum in oviduct
5-6
ewe transit time of ovum in oviduct
4
sow transit time of ovum in oviduct
2
bitch transit time of ovum in oviduct
8
queen transit time of ovum in oviduct
4-8
cow attachment (days)
20
mare attachment (days)
25-56
ewe attachment (days)
16
sow attachment (days)
16
bitch attachment (days)
16-18
queen attachment (days)
11-14
which domestic animals experience pseudopregnancy? how often?
mare: occasionally
sow: rare
bitch: always (60-90d)
queen: frequent (6wks avg)
cow gestation length
278-293
mare gestation length
330-345 (341 avg)
ewe gestation length
144-151
sow gestation length
112-115
bitch gestation length
63d from ovulation
queen gestation length
58-68
sow birth numbers
6-12
bitch litter size
1-20
queen litter size
1-8
doe length of estrus cycle
21d
doe duration of estrus
30-40h
doe time of ovulation
12-36 h after onset of estrus
doe time for attachment
10-11d
doe pseudopregnancy
frequent
doe gestatiomn length
147-155