Abortion occurrence, repeatability and factors associated with abortions in female pigs in commercial herds
Abortion occurrence, repeatability and factors associated with abortions in female pigs in commercial herds
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DOI：
10.1016/j.livsci.2016.01.023
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发表时间：
2016-03-01
影响因子：
1.8
通讯作者：
Koketsu, Yuzo
中科院分区：
文献类型：
--
作者：
Iida, Ryosuke;Pineiro, Carlos;Koketsu, Yuzo
流产的发生扰乱了母猪的预期生产量，增加了母猪的非生产日数。本研究的目的是（1）定义流产发生率，包括流产率和流产风险，（2）检查与流产相关的风险因素，（3）确定流产的可重复性，（4）比较流产和非流产再服务母猪的繁殖性能。数据集包括2008年至2013年在西班牙、葡萄牙和意大利的125个牛群中的122，935个终生性能记录和630，363个交配性能记录。年化流产率定义为流产记录数除以繁殖牛群寿命天数之和x 365天x 100。每次服务的流产风险定义为流产记录数除以服务记录数x100。采用随机羊群效应的广义线性模型对数据进行分析。年流产率（+/- SE）和每次服务的流产风险分别为3.0 +/- 0.05和1.2 +/-0.01%。每次配种流产风险增加的因素有产次0或产次5或更高、再次配种、7月和8月配种、前一胎产下死胎和断奶至首次配种间隔时间延长（P < 0.05）。妊娠（产次0）和产次5或以上母猪的流产风险比产次1母猪高03%（P < 0.05）。再服组流产风险比初服组高0.5%（P < 0.05）。7月和8月服务的女性流产风险比3月和4月服务的女性高0.4-0.5%（P < 0.05）。产死胎母猪流产风险比无死胎母猪高0.1%（P < 0.05）。断奶后7天以上配种的母猪流产风险比0-6天配种的母猪高0.2%（P < 0.05）。在7 187名曾流产一次的女性中，4.1%在同一胎次或以后的一次产次中经历了第二次流产。流产的重复性估计为24.3- 24.4%。流产后保留的母猪比未流产的再服务母猪的仔猪总产仔数低0.6头（P < 0.05）。流产与未流产再服务母鼠的分娩率和产仔数无显著性差异（P >= 0.11）。建议生产者密切监测有流产风险的母猪，以减少非生产性母猪日数。(C)2016由Elsevier B. V.出版
Abortion occurrences disturb the projected production volume and increase non-productive days of female pigs. The objectives of the present study were (1) to define abortion occurrences including abortion rate and abortion risk, (2) to examine risk factors that were associated with abortions, (3) to determine repeatability of abortions and (4) to compare reproductive performance between aborting and non-aborting re-serviced female pigs. Datasets included 122,935 lifetime performance records and 630,363 mating performance records of females in 125 herds between 2008 and 2013 in Spain, Portugal and Italy. Annualized abortion rate was defined as the number of abortion records divided by the sum of the reproductive herd life days x 365 days x 100. Abortion risk per service was defined as the number of abortion records divided by the number of service records x 100. Generalized linear models with random herd effect were applied to the data. Annualized abortion rate (+/- SE) and abortion risk per service were 3.0 +/- 0.05 and 1.2 +/- 0.01%, respectively. Factors for an increased abortion risk per service were parity 0 or parity 5 or higher, re-servicing, servicing in July and August, delivering stillborn fetuses in a previous litter and having prolonged weaning-to-first-mating interval (WMI; P < 0.05). Gifts (parity 0) and sows in parity 5 or higher had 03% higher abortion risk than parity 1 sows (P < 0.05). Re-serviced females had 0.5% higher abortion risk than first-serviced females (P < 0.05). Females serviced in July and August had 0.4-0.5% higher abortion risk than those serviced in March and April (P < 0.05). Sows that had previously delivered stillborn fetuses subsequently had 0.1% higher abortion risk than those that had no stillborn fetuses (P < 0.05). Sows mated 7 days or more after weaning had 0.2% higher abortion risk than those mated 0-6 days after weaning (P < 0.05). Of the 7187 females that had aborted once, 4.1% experienced a second abortion in the same or a later parity. The repeatability of abortions was estimated to be 24.3-24.4%. Females that were reserviced after aborting had 0.6 lower total number of piglets born than re serviced females that had not aborted (P < 0.05). However, there was no difference in farrowing rate or WMI between aborting and non-aborting re-serviced females (P >= 0.11). It is recommended that producers closely monitor female pigs at risk of having an abortion in order to reduce non-productive female days. (C) 2016 Published by Elsevier B.V.