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Length of productive life of sows in four pig farms in the tropics of Mexico

机译：墨西哥热带地区四个养猪场母猪的生产寿命

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摘要

The objective of this study was to determine the effect of some factors on the length of productive life (LPL), the number of parities (NP), and the culling interval (CI) of sows. The information from 2003 to 2009 of 3,746 sows with LPL and NP records and 5,819 sows with CI records from the four farms of Yucatan, Mexico was used. LPL was defined as the number of days between the first farrowing and culling or death and CI as the number of days between the last farrowing and culling. To determine the effects of farm, litter size at first farrowing (LSF1) and age at first farrowing (AF1) on LPL and NP, and of farm, LSF1 and culling reason on CI general linear models were used. Means and standard errors for LPL, NP, and CI were 496.4 ± 8.42 days, 3.35 ± 0.04 parities, and 48.3 ± 0.52 days, respectively. All factors had significant effects (P < 0.05) on LPL, NP, and CI. The sows from farm 2 stayed longer (806.0 days) and had more parities (5.25) than the sows from the other farms. Sows with the smallest litters (≤8 piglets) at first farrowing stayed the least time in the farm (675.1 days) and had the fewest parities (4.49). Gilts farrowing the first time before 331 days of age stayed longer time in the farm (726.4 days) and had more parities (4.81) in comparison with 331–348 and more than 348 days age groups. With respect to CI, the sows in farm 3 stayed the longest time in the farm. Sows with more than five parities were culled sooner after their last farrowing. In conclusion, differences between farms for LPL, PN, and CI were found. Females that farrowed at a short age and those with large litters stayed longer in the herd. Old sows and those culled for reproductive reasons stayed the least time in the herd after their last farrowing.
机译：本研究的目的是确定某些因素对母猪生产寿命（LPL）的长度，胎次数（NP）和淘汰间隔（CI）的影响。使用了从2003年到2009年来自墨西哥尤卡坦州四个农场的3,746头具有LPL和NP记录的母猪和5,819根具有CI记录的母猪的信息。 LPL被定义为第一次分娩与淘汰或死亡之间的天数，CI为最后一次分娩与淘汰之间的天数。为了确定农场的影响，使用第一胎（LSF1）的产仔数和第一胎（AF1）的年龄对LPL和NP的影响，并使用农场，LSF1和淘汰原因对CI通用线性模型的影响。 LPL，NP和CI的均值和标准误分别为496.4±8.42天，3.35±0.04个奇偶校验和48.3±0.52天。所有因素均对LPL，NP和CI有显着影响（P <0.05）。农场2的母猪比其他农场的母猪停留时间更长（806.0天），胎次更多（5.25）。初次分娩时产仔数最小（≤8头）的母猪在农场的时间最少（675.1天），胎次最少（4.49）。与331–348和348天以上的年龄组相比，第一次在331天龄之前分娩的母猪在农场中的停留时间更长（726.4天），并且具有更多的胎次（4.81）。关于CI，农场3中的母猪在农场中的停留时间最长。超过五胎的母猪在最后一次分娩后被较早淘汰。总之，发现了LPL，PN和CI场之间的差异。胎龄较短的雌性和产仔较多的雌性在畜群中的存活时间更长。在最后一次分娩后，旧母猪和因生殖原因而淘汰的母猪在畜群中停留的时间最少。

著录项

  • 来源
    《Tropical Animal Health and Production》 |2011年第6期|1191-1194|共4页
  • 作者

    José C. Segura-Correa; Enrique J. Ek-Mex; Alejandro Alzina-López; Juan G. Maga?a-Monforte; Luis Sarmiento-Franco; Ronald H. Santos-Ricalde;

  • 作者单位

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

    Facultad de Medicina Veterinaria y Zootecnia Universidad Autónoma de Yucatán Km 15.5 Carretera Mérida-X’matkuil Apdo Postal 4-116 Itzimná 97100 Mérida Yucatán Mexico;

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  • 正文语种 eng
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  • 关键词

    Age at first farrowing; Number of parities; Litter size; Tropics;

    机译：第一次分娩的年龄;胎次;产仔数;热带;

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