View Full Table | Close Full ViewTable 1.

The effect of dam parity (parity 1 vs. parity 4) on litter and pig measurements

 
Parity
Item 1 SEM 4 SEM P-value
No. of sows 16 24
No. of pigs per litter
    Total born 12.79 0.86 12.79 0.77 0.999
    Born live 12.00 0.84 11.50 0.74 0.660
    Stillbirths 0.63 0.23 1.13 0.21 0.125
    Mummified fetuses 0.16 0.09 0.21 0.08 0.682
    Mortality (preweaning) 2.68 0.56 1.83 0.50 0.260
    Weaned 10.16 0.44 10.13 0.39 0.956
Avg. piglet BW, kg
    Birth (d 0) 1.32 0.04 1.56 0.04 <0.001
    d 7 2.53 0.11 3.00 0.09 0.002
    d 14 4.36 0.13 5.08 0.12 <0.001
    Weaning (d 19) 5.39 0.17 6.06 0.15 0.005
    BW gain (0 to 19 d) 4.10 0.16 4.44 0.15 0.107



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The effect of dam parity (parity 1 vs. parity 4) on similarity indexes1 of microbial populations in piglets (3 pigs per litter and 3 litters per parity)1

 
Day Parity 1 Parity 4 SEM P-value
d 1 39.64 44.22 4.33 0.46
d 7 52.44 34.13 4.40 0.01
d 14 34.75 44.23 3.04 0.03
1Similarity indexes are calculated using the BioNumerics software version 5.0 (Applied Maths, Kortrijk, Belgium). The denaturing gradient gel electrophoresis fingerprints were transformed to peak profiles. Intensities of individual bands were determined as a percent peak surface area relative to the surface area of the entire molecular fingerprint of the sample.



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The effect of dam parity (parity 1 vs. parity 4) on diversity indexes1 of microbial populations in piglets (3 pigs per litter and 3 litters per parity)1

 
Diversity coefficient
Day Parity 1 SEM Parity 4 SEM P-value
Shannon
d 0 1.85 0.28 1.20 0.28 0.128
d 7 2.80 0.11 2.35 0.14 0.033
d 14 2.65 0.20 2.42 0.20 0.457
Simpson
d 0 0.30 0.16 0.37 0.16 0.777
d 7 0.08 0.02 0.16 0.03 0.072
d 14 0.09 0.03 0.13 0.03 0.312
1Diversity indexes were calculated by comparing molecular fingerprints of DNA. A greater Shannon’s diversity index represents more diversity. A lower Simpson’s diversity index represents greater diversity.