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ASC 408G: Swine > Nutrition for life stages (part 1) > Flashcards

Nutrition for life stages (part 1) Flashcards

1
Q

nutrition in boars influences what

A

libido
structural soundness
longevity
sperm production
semen quality

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2
Q

what group is most often overlooked in terms of nutrition requirements

A

boars

**often fed gestation diet
**limit fed

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3
Q

the primary goal for boars used in natural services is to minimize ________________ to allow boars to _____________

A

mature body weight
mate with smaller gilts/sows

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4
Q

overfeeding boars can impair ___________ and lead to ______ problems and decreased ___________

A

libido
reproductive
length of service

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5
Q

for natural service boars, is energy intake restricted

A

yes, slightly

still maintain high AA,vitamins, and minerals

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6
Q

the nutrition program for AI boars should be managed to

A

optimize sperm production and quality of semen

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7
Q

T/F there is a reduced emphasis placed on minimizing mature body size for AI boars compared to natural service

A

true

**doesnt matter since they use a mounting dummy

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8
Q

feeding low protien to AI boars leads to

A

low libido

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9
Q

too much fat causes what to happen in AI boars

A

harder to mount dummy
impact sperm production

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10
Q

T/F boars require the same minerals and vitamins in similar amounts as gestating sows

A

true

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11
Q

zinc and selenium are slightly elevated as they are directly involved in

A

sperm production

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12
Q

vitamin C in some cases is added to boar diets to help offset

A

negative effects of heat stress

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13
Q

what does zinc do for boars

A

role in testicular function and growth

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14
Q

what does selenium do for boars

A

impact sperm concentration and fertility

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15
Q

what do omega 3 fatty acids do for boars

A

positively influence boar fertility by improving sperm viability and motility

**alive longer, swim better
**add fish meal

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16
Q

this is a beta-adrenergic agonist that is approved for inclusion in finishing diets, increases fat free lean and can reduce fat deposition

A

ractopamine hydrochloride (paylean)

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17
Q

ractopamine hydrochloride (paylean) can increase fat free lean by how much

A

25-35%

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18
Q

Ractopamine hydrochloride is typically fed _______g/ton of complete swine finishing feed containing at least _______%CP for the last __________pounds of gain

A

4.5-9
16%
45-90 lbs

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19
Q

because of the increase protein deposition from ractopamine hydrochloride ___________ concentrations to support the ______________ need to be increases

A

amino acid
improvement of lean gain

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20
Q

how much of a return is there from ractopamine hydrochloride

A

$2/pig

21
Q

advantages of ractopamine hydrochloride

A

increase ADG
increase lean gain
increase dressing %
lower backfat
better feed efficiency
fewer days on feed

22
Q

disadvantages of ractopamine hydrochloride

A

meat less tender
increased heart rate (PSS)
more sensitive to rough handling

23
Q

what countries does not allow their pork to have ractopamine hydrochloride

A

European union
Russia
china

24
Q

pigs eat to ______________________

A

meet their energy requirements

25
Q

if the diet is high in energy, by adding fat, pigs will

A

decrease their feed intake

26
Q

if the energy density of the diet is diluted by feeding fibrous feedstuffs what will happen

A

pigs will consume more

27
Q

a high energy will cause intake to decrease, therefore what needs to happen to nutrient concentration

A

need to be increased to maintain constant daily intake

28
Q

a diet low in energy should contain ________________________ because feed intake will be increased

A

lower concentration of nutrients

29
Q

what kind of diet is not recommended for finishers

A

low energy density diet

30
Q

separate sex feeding will ________________________

A

more closely match nutrient concentration to the requirement of the pig

31
Q

_______________ typically have a higher feed intake capacity without a larger potential for lean gain, thus diets should be fed that are somewhat lower in _________

A

barrows
amino acids

32
Q

T/F gilts are fed an earlier phase diet than barrows at the same body weight

A

true

33
Q

since gilts are fed an earlier phase diet than barrows at the same body weight, they can be fed a ______________________ for the first phase in the finisher, followed by ______________ for their first diet

A

more nutrient dense diet
the diet that barrows consumed

34
Q

do gilts have a high capacity for lean gain

A

yes

35
Q

barrows have a higher feed intake capacity, less lean gain, and diets lower in AA concentrations

does this mean they will consume more or less feed per day

A

more

36
Q

phase feeding matches

A

diets with specific nutrient compositions to the growth of the pig

37
Q

phase feeding matches

A

diets with specific nutrient compositions to the growth of the pig

38
Q

phase feeding minimizes instances of

A

overfeeding
wasting costly ingredients
underfeeding
not meeting the nutritional requirements

39
Q

phase feeding will reduce the overall

A

diet cost per day

40
Q

each additional phase in phase feeding will improve

A

profitability
reduced nutrient excretion

41
Q

Feeding high levels of a protein that pigs cant utilize causes

A

increase in nitrogen excretion
increases run-off problems

42
Q

feeding low levels of a protein that pigs cant utilize causes

A

decreases rate of gain
increased time on feed

43
Q

what kind of phase feeding is used most often

A

6 phase feeding program

44
Q

SID lysine requirement is closest to what phase program

A

6 phase feeding program

45
Q

what kind of phase feeding is used least often

A

2 phase feeding program

**doesn’t meet requirements

46
Q

feed represents approx _______% of the total cost of production. Finishing pigs are fed ________

A

65-75
ad lib

47
Q

why are finishing pigs fed ad lib

A

helps encourage them to eat as much as they want
= increase in gain/have high levels of ADG

48
Q

the nutritional requirements __________ as the animal grows heavier due to changes in ___________________

A

decrease
maintenance requirement and the composition of growth

ASC 408G: Swine (37 decks)

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