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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Porcine+Health+Manag
2018 ; 4
(ä): 15
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High-performing farms exploit reproductive potential of high and low prolific
sows better than low-performing farms
#MMPMID30026960
Tani S
; Piñeiro C
; Koketsu Y
Porcine Health Manag
2018[]; 4
(ä): 15
PMID30026960
show ga
BACKGROUND: Our objective was to examine the impact of farm effects and sow
potential on various aspects of sow performance. We examined the interaction
between sow prolificacy groups categorized at parity 1 and farm productivity
groups for reproductive performance across parities, and lifetime performance.
Data included 419,290 service records of 85,096 sows, on 98 Spanish farms, from
first-service as gilts to removal, that were served between 2008 and 2013. Farms
were categorized into three productivity groups based on the upper and lower 25th
percentiles of the farm means of annualized lifetime piglets weaned per sow over
the 6 years: high-performing (HP), intermediate-performing (IP), and
low-performing (LP) farms. Also, parity 1 sows were categorized into three groups
based on the upper and lower 10th percentiles of piglets born alive (PBA) as
follows: 15 piglets or more (H-prolific), 8 to 14 piglets, and 7 piglets or fewer
(L-prolific). The farm groups represent farm effects, whereas the sow groups
represent sow potential. Linear mixed effects models were performed with
factorial arrangements and repeated measures. RESULTS: Mean parity at removal
(4.8?±?0.01) was not associated with three farm productivity groups (P?=?0.43).
However, HP farms had 7.7% higher farrowing rates than LP farms (P? 0.05). As a
result, H-prolific and L-prolific sows on HP farms had 29.7 and 30.7 fewer
non-productive days during lifetime than the respective sows on LP farms
(P? 0.05). Furthermore, the H-prolific and L-prolific sows on HP farms had 4.9
and 6.2 more annualized piglets weaned than respective H-prolific and L-prolific
sows on LP farms (P? 0.05), which was achieved by giving birth to 0.8-1.0 and
1.4-1.7 more PBA per litter, respectively, than on HP farms during parities 2-6
(P? 0.05). During the first parity, HP farms had 18.8% H-prolific sows compared
to 6.2% on LP farms. CONCLUSION: Farm effects substantially affected lifetime
performance of sows. Higher lifetime productivity of sows on HP farms was
achieved by higher farrowing rate, fewer non-productive days, more PBA and more
piglets weaned per sow, regardless of prolific category of the sows.