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Piglet preweaning mortality in a commercial swine herd in Thailand

机译：泰国一家商业猪群的仔猪断奶前死亡率

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In the modern swine industry, the number of piglets born alive per litter is dramatically increasing due to genetic improvement of litter traits. However, knowledge on post-partum management is inadequate to reduce piglet preweaning mortality. The present study aimed to investigate piglet preweaning mortality in a commercial swine herd in Thailand in relation to the number of littermate pigs and piglet birth weight. Data included 11,154 litters from 3574 sows farrowed from January 2009 to December 2012. Littermate pig was defined as the number of piglets after cross-fostering. Number of littermate pigs was classified as 1-7, 8-10, 11-12, and 13-15 piglets per litter. Mean birth weight of the piglets was classified as low (< 1.30 kg), medium (1.30-1.79 kg), and high (a parts per thousand yen1.80 kg). Piglet preweaning mortality was calculated, logged transformed, and analyzed by general linear mixed models. On average, piglet preweaning mortality was 14.5 % (median = 10.0 %). Piglet preweaning mortality in the litter with 13-15 littermate pigs (24.1 %) was significantly higher than the litter with 1-7 (11.9 %, P < 0.001), 8-10 (11.8 %, P < 0.001), and 11-12 (14.6 %, P < 0.001) littermate pigs. The litters with a low piglet birth weight had a higher piglet preweaning mortality rate (18.8 %) than the litters with a medium (15.7 %, P < 0.001) and a high piglet birth weight (12.1 %, P < 0.001). In conclusion, to reduce piglet preweaning mortality in commercial swine herds, special care needs to be taken in litters with more than 13 littermate pigs and with piglets with birth weight below 1.30 kg.
机译：在现代养猪业中，由于仔猪性状的遗传改良，每窝活产仔猪的数量急剧增加。但是，有关产后管理的知识不足以降低仔猪断奶前的死亡率。本研究旨在调查泰国商业猪群中仔猪断奶前的死亡率与同窝仔猪数量和仔猪出生体重的关系。数据包括2009年1月至2012年12月分娩的3574头母猪的11154窝。交配仔猪的定义为杂交后仔猪的数量。同窝猪的数量分为每窝1-7、8-10、11-12和13-15头。仔猪的平均出生体重分为低（<1.30千克），中（1.30-1.79千克）和高（千分之几1.80千克）。计算仔猪断奶前的死亡率，记录其转化，并通过一般的线性混合模型进行分析。平均而言，仔猪断奶前死亡率为14.5％（中位数= 10.0％）。产仔数为13-15头的仔猪的断奶前死亡率（24.1％）显着高于产仔数为1-7（11.9％，P <0.001），8-10（11.8％，P <0.001）和11- 12（14.6％，P <0.001）同窝猪。仔猪出生体重低的仔猪断奶前断奶死亡率（18.8％）要比中等猪仔出生体重高的仔猪（12.1％，P <0.001）的断奶前死亡率高（18.8％）。总之，为了降低商业猪群的仔猪断奶前死亡率，需要特别注意仔猪超过13头，出生体重低于1.30千克的仔猪。

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