Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Breeding > Dairy Cattle Reproduction (Part 1) > Flashcards

Dairy Cattle Reproduction (Part 1) Flashcards

1
Q

Contribution to world milk production
Cattle

A

83%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Contribution to world milk production
Goat

A

2%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Contribution to world milk production
Buffalo

A

13%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Contribution to world milk production
Sheep

A

1%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Camels

A

.4%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Contribution to world milk production
Equine & yak

A

.6%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Contribution to world milk production

A

Cattle
Buffalo
Goat
Sheep
Other species
Camels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which one is more important in milk production ?
Goat & Sheep

A

Goat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Holstein cow By 2010 yield

A

4.5 times the production of her ancestors at 1940 (2097 kg vs. 9590 kg)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Higher milk production is commonly associated with …… in dairy cows

A

Reduced fertility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why and why not I choose this job / project?

A
  • The demand for milk has always increased
  • Employment is uniform throughout the yean
  • Income is guaranteed every day
  • The most advanced among animal production projects
  • As a lifestyle, many believe that dairying is unsurpassable Be with animals. Be outside
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Egypt Kg Per Capita

A

42 Kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Top average country Per Capita

A

Finland → 457 Kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Bottom average country Per Capita

A

Timor → 1.02 Kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Egypt`s Milk Profile

A

4.7 million tons/year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

HOW TO OPTIMISE REPRODUCTION & REDUCE INVOLUNTARY CULLING

A

The optimal calving interval is 12— 12.5 months

17
Q

Which Cow is eligible for breeding?

A

Normal cow and passed 50 - 60 days after calving

18
Q

To achieve a Cl of 365-380 d

A

The early postpartum period is critical (Fresh cows) :

  • Rapid involution of the uterus
  • Rapid resumption of normal ovarian activity
19
Q

With AI

A
  • Accurate estrus detection (HD)
  • High conception (proper insemination) (CR)
20
Q

Economic Loss due to Infertility (Long Calving Interval)

A
  • Less lifetime milk yield
  • Fewer calves for replacement
  • Direct costs
  • Culling of valuable cows
21
Q

Cow Puberty

A

Able to release gametes and to manifest sexual behavior

  • Age of puberty: 5 - 18 months
  • It depends mainly on body weight (280 - 300 Kg)
22
Q

Jersey Puberty

A

9 Months

23
Q

Holstein Puberty

A

11 Months

24
Q

Cows estrous

A

21 Days
polyestrous and not seasonal

25
Q

Estrous will continue , excpet

A
  • During pregnancy
  • Negative energy balance , as during high milk yield (Energy produced in milk is higher than consumed one)
  • A short period after calving
  • Disease (e.g. smooth ovaries)
26
Q

Silent heat; silent ovulation, or Subestrus

A
  • Animals fail to show signs of estrus despite having normal cycle
  • It can he due to the herdsperson failing to observe the signs; rather than a failure of the cow to show signs
27
Q

Estrus (Heat)

A

2 - 30 hours

15 hours in mean

28
Q

Days open

A

75 - 110 Day

29
Q

Ovulation type

A

Spontaneous

30
Q

CL life span

A

14 - 16 days

31
Q

Advantages of 21-PR as a measure of fertility

A

It takes into account both SR and CR

It summarizes herd fertility at short intervals

Therefore, it has become the standard measure of reproductive performance

The 21 -d PR should be 35% or greater. However, many herds achieve 21 -PR of to 25%.

32
Q

The 21 -d PR should be …

A

35% or greater

33
Q

Calving interval is used for …..

A

individual cows

34
Q

Calving index is the …….

A

average of calving intervals of all cows

35
Q

CCI

A

interval from calving to conception (for pregnant cows)

36
Q

DO

A

interval from calving to conception (for pregnant cows) + interval from calving to culling or to death (for cows failing to conceive)

37
Q

SPC

A

the inverse of CR

Breeding (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions