Sow fertility and piglet quality - AHDB...
Transcript of Sow fertility and piglet quality - AHDB...
Sow Fertility and Piglet Quality
Nutritional Opportunities and Consequences
Dr. Bill Close
Close Consultancy
BPEX Meetings
November – December 2014
Contents
• Components of litter size
• Litter size and piglet quality
• Nutritional influences :Transitional nutrition
• Importance of colostrum
• Strategies to improve colostrum intake
• Sow selection and piglet potential
• Conclusions
3
Danish production herds from 1992 to 2010
Vivi Aarestrup Moustsen, Flemming Thorup (DK)
Changes in sow productivity: Selected countries
Finished pigs/sow/year
Country Year
Change/year 2000 2005 2010 2013
Denmark 21.4 22.2 26.0 28.4 +0.54
Netherlands 19.1 20.0 25.7 26.0 +0.53
Germany 17.7 19.5 23.4 25.5 +0.60
France 20.2 22.4 24.1 25.1 +0.38
Ireland 17.8 19.7 19.6 25.9 +0.62
UK 18.7 18.6 21.6 24.8 +0.47
(BPEX, 2014)
Determinants of litter size
• The no. of oocytes shed at ovulation (100%)
• The no. of eggs that are fertilised (90%)
• The no. of fertilised eggs successfully implanted (65%)
• The no. of implanted eggs that survive to birth (60%)
Components of sow productivity
Ova produced (20)
Ova fertilised (18)
Embryos survived (13)
Piglets born alive / litter (12)
Piglets weaned / litter (11) Litters / sow / year (2.3)
Piglets weaned / sow / year (25)
Components of litter size in pigs
Insulin
Progesterone
LH / FSH Ovulation rate
Fertilisation rate
Embryo survival
Uterine capacity
Litter size
USPs
Nutritional Strategies
How much does the lactating sow need to eat?
200 kg sow; 25-day lactation; 10 - 15 kg weight loss
Litter size 10 12 14
Weaning weight (kg) 8.0 7.4 6.8
Piglet growth rate (g/d) 250 235 220
Maintenance (MJ/d) 25.0 25.0 25.0
Milk production (MJ/d) 70.0 79.0 86.2
Total (MJ/d) 95.0 104.0 111.2
Body reserves (MJ/d) 6.0 8.0 10.0
Total requirements (MJ/d) 89.0 96.0 101.2
Feed (kg/d) 6.6 7.1 7.6
Feed intake of the sow during lactation
200 kg sow at farrowing: 10-20 kg weight loss during lactation
Litter size: 10 piglets Piglet weight at 21 days: 7 kg
Litter size: 14 piglets Piglet weight at 21 days: 6 kg
14 piglets
Lactation weight loss to be <7% of body weight
13
Priorities for feeding the sow in gestation
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
0 2 4 6 8 10 12 14 16
Feed r
equirem
ent
(kg/d
)
Gestation (weeks)
Diet 2 (optional) Diet 1
Maximum survival of quality
embryos
Muscle fibre development Sow weight/condition, gain
Foetal/mammary development
Foetal growth Mammary growth
Sow body condition
* Sow in ideal body condition (score 3.0-3.5) during gestation
Nutritional opportunities
Post weaning and post mating
Late gestation and prior to farrowing
Transitional / Programmed Nutrition
Transitional strategies
post weaning / post mating
• Increased feed / Nutrient intake
• Starch / Sugars
• Fermentable Fibres
• Amino Acids (L-arginine, glutamine)
• Acids
• Anti-oxidants
• Minerals (Se, Fe, Cu, Mn)
• Vitamins (A, C, E, B, Folic acid)
Effect of sugars on sow reproduction
Sows received 150 g dextrose + 150 g lactose after weaning
Control Dextrose+Lactose Significance
Litter size 14.09 14.40 NS
Birth weight (kg) 1.46 1.55 p 0.05
CV Birth weight (%) 23.7 20.5 p 0.04
Total mortality (%) 20.4 17.2 p 0.09
Van der Brand et al. 2009
High fibre and embryo survival
Control High fibre P
No. of corpora lutea 16.9 16.7 NS
No. of viable foetuses 12.4 14.7 NS
Embryo survival (%) 73.2 91.2 0.02
Oocytes details:
Metaphase I (%) 25.2 20.1 NS
Metaphase II (%) 65.7 75.7 0.006
Ferguson et al. 2010
End result – Thin sows
Feeding strategy in early gestation
Previous lactation
Body weight loss (kg) 21.7
Body weight loss (%) 10.4
P2 loss (mm) 3.0
Feeding post mating (d3 – 32)
Feed (kg/d) 2.5 3.25
Farrowing rate (%) 89.8 76.6
No. of piglets born 13.2 15.2
No. of piglets born alive 12.6 14.4
Av. birth weight (kg) 1.45 1.42
Mortality (d 1-31) (%) 8.7 10.3
(Hoving et al. 2011)
Suggested feed in gestation
1.5
2
2.5
3
3.5
0 7 14 21 28 35 42 49 56 63 70 77 84 91 98 105 112
Feed (kg/d)
Stage of gestation (days)
2.4 kg
Transitional strategies
Pre-farrowing/Lactation
• Amino acids
• Ca, P
• Electrolytes
• Energy sources
• Fibre
• Omega-3 fatty acids (EPA,DHA)
• L-carnitine
• Betaine
Effects of sugarbeet (SBP) on sow reproduction
Control SBP
Piglets born 11.41 12.37
Piglets born alive 10.85 11.47
Ferguson et al. 2004
Day 11 of lactation (20%); Wean – Oestrus (40%)
Effect of L-Carnitine on sow productivity
Diets: Control; Carnitine 125 and 250 mg/d
Diet Control +Carnitine P value
Born alive 11.3 11.5 ns
Weaned 9.0 9.4 0.06
Birth weight (kg) 1.45 1.53 0.03
Weaning weight (kg) 7.55 7.98 0.01
(Eder et al. 2010)
Effect of Omega-3 fatty acids on litter size
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1 2 3 4 5
Dif
fere
nce i
n p
igle
ts/lit
ter
Study
Live born
Weaned
Effect of N-3 fatty acid on sow productivity
Control N-3
Total born 10.9 11.2
Born alive 10.1 10.4
Wean-oestrus (d) 7.8 6.3
Subsequent parity
Farrowing rate (%) 72.1 73.8
Total born 9.7 10.7
Born alive 9.3 10.3
3 kg salmon oil/T of feed:
diets fed 8 days pre-farrowing to weaning at 19 days
(Smits et al, 2011)
Not just NUMBERS
QUALITY is also important
Litter size and birth weight
Beaulieu et al. (2010)
Consequences of more piglets / litter
• Reduced birth weight
• Higher stillbirth rate
• Higher pre-weaning mortality
• Greater variation
• Reduced colostrum intake
• Reduced immunity
• Reduced growth and weaning weight
• More days to slaughter
Low litter birth weight due to:
1. High ovulation rates (>25 ovulations)
2. Intrauterine Crowding (IUC) in early gestation
3. Limited placental development from D30 of gestation onwards
4. Measurable effects on fetal development by D50 of gestation onwards
(After Foxcroft, 2013)
Good health and immunity begin at birth
Importance of colostrum
Importance of colostrum:
• During the first postnatal day, energy reserves provide some 35-40 % of the total energy required by the piglet to survive
• Glycogen reserves sufficient for first 12 – 16 h
• The piglet must consume 150 to 170g colostrum / kg birth weight (220 to 250g for a 1.4 kg piglet) to meet energy needs
• Source of immunoglobulins and growth factors
Colostrum
Important source of:
– Energy
– Amino Acids
– Trace minerals (Cu, Fe, Zn, Se)
– Vitamins (A,D,E, B12 etc.)
– Immunoglobulins
– Functional peptides
– Stimulates gut function
– Hormones (growth factors)
Colostrum production and litter size
(Quesnel, 2011)
1 -Birth-weight 30g / 100g increase in birth-weight
2 -Birth hypoxia delayed 1st suckling and
reduced colostrum intake
3 -Cold stress delayed 1st suckling and reduced
colostrum intake
4 -Birth order later born, lower consumption
5 -Litter size -45g / additional pig born (litter size
ranging from 10 to 16 piglets)
Factors influencing colostrum consumption of piglets
Ig concentration of colostrum
0
20
40
60
80
100
120
0 12 24 36 48 60 72
Ig (
mg
/ml)
Stage of lactation (hours)
IgG
IgA
IgM
Klobasa et al., 1987
Growth hormones in colostrum and milk
Colostrum Milk
Insulin (ng/ml) 18 2.4
IGF-I (ng/ml) 301 10
IGF-II (ng/ml) 291 15
EGF (ng/ml) 1572 190
TGF ß (ng/ml) 190 ND
(Various sources: Zu, 2003)
Ways to increase colostrum quality and quantity
• Increase feeding level in late gestation
• Provide omega-3 fatty acids: fish oil/algae
• Soluble fibres in diets: SBP, Pectins etc.
• Fermentable products
• Fatty acids, CLA, HMB etc
• MOS/Yeast products
• Management techniques/Interventions
Effect of MOS on sow productivity
1 kg/Ton in gestation and lactation
France Canada P
Control MOS Control MOS
Birth weight (kg) 1.37 1.41 1.45 1.45
Growth rate (0-24 h) 83 123 138 164 0.02
Colostrum (g/piglet) 304 362 364 385 0.04
Pre-wean mortality (%) 13.9 8.4 11.4 8.1 0.02
Litter weaning weight (kg) 58.2 61.6 71.6 79.3 0.02
(Le Dividich, 2009)
Effect of dietary crude fibre on colostrum production
Crude fibre (%) 3.3 7.9 P values
NDF (%) 13.1 20.3
Colostrum production (l/24 h) 3.9 3.8 0.75
Birth - Suckling time (min) 29 25 0.29
Mortality 0-24 h (%) 8.5 6.9 0.54
(Loisel et al, 2013)
Dietary fibre and low birthweight piglets (<900g)
0
50
100
150
200
250
Colostrum intake
g/day Control High fibre
20
25
30
35
40
45
Time: Birth --> 1st Suckling
Min. Control High Fibre
(Loisel et al, 2013)
Take Home Message
• The first born pigs have ready access to colostrum and milk
• The last born pigs must compete with the fortunate first born piglets
• We must intervene to manage this process through split-suckling and other management techniques, insuring all pigs have adequate colostrum
• The first 48 hours is where effort should be placed
Selection criteria and piglet potential
Sows need to have sufficient body reserves to ensure
a long and productive breeding life: >5 parities
• 1st Mating at: 220 – 240 days of age
130 – 150 kg
16 – 18 mm P2
Serve at 3rd Oestrus
Cull animals not mated by 9 months of age
Good body condition (score >3.0)
Good legs
Select for 14 - 16 teats
Selection criteria for reproductive potential
Gilts / Pregnancy
Selection criteria for reproductive potential
Lactation / Post-weaning
• Body weight pre-farrow: 200 – 220 kg; Condition Score: 3.5
• Piglet weight at: Birth (1.4 kg) 24 hours (1.6 kg); Weaning (8.5kg)
= Colostrum and Milk production!
• Time to 1st Suckling: <30 mins = Vigour and Vitality
• Percentage of piglets alive at 5 days: >90%
• Optimise feed intake in lactation: >6 – 8 kg/day
• Provide creep diet: >300 g/piglet by day 28
• Lactation weight loss: <7% of body weight
• Maintain good sow body condition: >2.5
• Wean – mating interval 5-7 days
>7 days = reduced performance
Take-home message
New developments in sow feeding programmes, on
colostrum management, as well as on-farm practices and
accurate recording of key production traits will ensure that
sows will wean 30 quality piglets per year and that growth
rate to slaughter is increased by at least 50 g/day.
Are you ready for the challenge?
Take-home message
THE MOST IMPORTANT FACTOR IN REPRODUCTION is
MANAGEMENT
IT IS UP TO YOU!!!
Are you ready for the challenge?
51
I‘m Ready for the
challenge!!
ARE YOU??
Thank you.