Brainscape's Knowledge GenomeTM

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


See full index

VGE 411 > Unit 7- Management and nutrition of the replacement gilt > Flashcards

Unit 7- Management and nutrition of the replacement gilt Flashcards

1
Q

What do we select for in gilts?

A

Genetically superior lines
Good profligacy
Good mothering ability
Good health

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

What is the least % replacement rate?

A

20%

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

A gilt must get no boar exposure before approximately …

A

168 days (5-6 months)

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

What is the prefered floor space for a gilt house?

A

1.2 – 1.5 m2/gilt

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

What is the gilt house temp?

A

17-25°C

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

What is considered a sufficient trough space to prevent fighting?

A

30cm per gilt

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

What is the factors influencing gilt lifetime production?

A
  • Growth rate during rearing
  • Nutritional levels
  • Ovulation rate at oestrus
  • Weight (condition) at first service
  • Age at successful mating
  • First litter size
  • Ability to successfully rebreed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the expected farrowing rates for gilts?

A

> 90%

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

What are the expected number of piglets born form gilts?

A

> 13.5

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

What are the expected number weaned on first parity?

A

> 11.5

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

What do we expect from gilts?

A
  • Farrowing rates (gilts) > 90%
  • Total born >13.5
  • Weaned/first parity > 11.5
  • Retention rate from P1 to P2 >90%
  • No “second litter dip” problems
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the appropriate weight for a gilt to start mating?

A

140 - 150 Kg

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

What is the appropriate age for a gilt to start mating?

A

220-240 days

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

At what oestrus should a gilt breed?

A

Between 2nd and 3rd but never at 1st oestrus

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

What amount of fat stores must a gilt have on mating and farrowing?

A

13 - 15 mm P2 at mating
15 - 16 mm P2 at farrowing

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

What is the “boar effect” on gilts?

A

Boars accelerate and synchronize puberty in gilts through:
1. Priming pheromones (3α-androstenol) in saliva of boar
2. Tactile stimuli
3. Auditory stimuli
4. Visual stimuli

17
Q

Until when does a gilt still deposit lean tissue?

A

3rd parity

18
Q

What happens when energy stores are tapped during lactation?

A

Infertility will follow

19
Q

What is the difference between feeding a gilt over a finishing slaughter pig?

A
  1. Lower level of feeding to slow growth and limit body size to improve bone development
  2. Lower lysine in diet
  3. Higher Ca and P levels than for growing pigs (0.82% Ca; 0.73% P in the diet)
  4. Maximise bone mineralization to improve reproductive longevity
20
Q

What is the body weight gain from birth to mating for a gilt?

A

550-650g per day

21
Q

What happens when a gilt has a weight gain of <550g/day?

A

Negatively affect ova maturation and follicle size
Delayed puberty
Poor udder development
Poor lifetime productivity

22
Q

What is the effect of too fast growth rate in gilts?

A
  • Higher feed cost due to high maintenance requirements
  • Structure problems
23
Q

What is the basic feed program?

A
  • The rearing program start at 25 kg till first service
  • A min of three dietary phases used during rearing!
  • Ensure that there is a smooth transition between diets.
  • Minimize the use of by-products or any high-risk ingredients!
  • Flush sows at least 10 to 14 days before first service.
24
Q

Name the different feeding systems?

A
  1. Long trough – Liquid feeding
  2. Long trough – Dry feeding
  3. Single space – Dry feeding
25
Q

What is flush feeding in gilts?

A

Feed gilts ad libitum 10 to 14 days with special flush feed before insemination

26
Q

What is the effect of flush feeding in gilts before mating?

A
  1. Increase LH release
  2. Increase ovulation rate
  3. Increase uniformity and quality of ovum’s
  4. Stimulate fat deposition
27
Q

How do we assess pigs body condition?

A
  1. Body weight
  2. Body condition scoring
  3. Ultrasound estimate of back fat depth
  4. P2 measurement at last rib
28
Q

What is the difference between 2nd cycle vs the 1st cycle?

A

Known as the Second litter syndrome
1. Lower pregnancy rate
2. Lower farrowing rate
3. Lower litter size

Resulting from relatively high weight losses during first lactation

29
Q

How do we overcome Second litter syndrome?

A
  1. Feed intake during first lactation needs to be improved
  2. Optimize pre-farrowing nutritional management
  3. Optimize lactational nutritional management

VGE 411 (8 decks)

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