<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-5472</journal-id>
<journal-title><![CDATA[Agricultura, sociedad y desarrollo]]></journal-title>
<abbrev-journal-title><![CDATA[agric. soc. desarro]]></abbrev-journal-title>
<issn>1870-5472</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-54722016000300493</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Indicadores reproductivos de vacas lecheras en agroempresas con diferente nivel tecnológico en Los Altos de Jalisco]]></article-title>
<article-title xml:lang="en"><![CDATA[Reproductive indicators of dairy cows in agribusinesses with different technological level in the Jalisco Highlands]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mariscal-Aguayo]]></surname>
<given-names><![CDATA[Valentina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco-Cervantes]]></surname>
<given-names><![CDATA[Adriana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrella-Quintero]]></surname>
<given-names><![CDATA[Heriberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huerta-Bravo]]></surname>
<given-names><![CDATA[Maximino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rangel-Santos]]></surname>
<given-names><![CDATA[Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Núñez-Domínguez]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[ Estado México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,aff2  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>13</volume>
<numero>3</numero>
<fpage>493</fpage>
<lpage>507</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-54722016000300493&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-54722016000300493&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-54722016000300493&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La reproducción de los bovinos lecheros se puede afectar por factores relacionados con el manejo. El objetivo del trabajo fue evaluar el comportamiento reproductivo en vacas lecheras de agroempresas con dos niveles tecnológicos (NT): transición y empresarial, que utilizan el desarrollo tecnológico de asesoría y consultoría CHAPINGO-AGROPEC Star®. Se analizó información de 17 agroempresas que incluyeron 2041 vacas y 5922 partos. Las variables fueron: edad al primer parto (EPP), servicios por concepción (SPC), días abiertos (DA), intervalo entre partos (IEP), intervalo al primer celo posparto (IPCP) e intervalo al primer servicio posparto (IPSP). Se consideró un modelo mixto que incluyó los efectos fijos de número (NP), año (AP) y época (EP) de parto, NT y agro-empresa (AE), y las interacciones dobles significativas entre estos efectos. Se obtuvieron diferencias significativas (p&#8804;0.05) en NT para los indicadores IPCP e IPSP; la interacción de NT por AP, además de tener efecto en estas dos variables, también influyó en EPP. El NT empresarial presentó IPCP y IPSP (63.8±6.2 y 75.7±5.5 d) menores que el NT de transición (90.8±2.7 y 91.1±2.3 d). El comportamiento reproductivo de las vacas en los dos NT fue similar debido a que no hubo diferencias significativas en EPP, SPC, DA e IEP.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The reproduction of dairy cows can be affected by factors related to management. The objective of the study was to evaluate the reproductive behavior of dairy cows in agribusinesses with two technological levels (TL): transition and entrepreneurial, which use CHAPINGO-AGROPEC Star advice and consulting for technological development. Information from 17 agribusinesses was analyzed, which included 2041 cows and 5922 labors. The variables were: age at first labor (AFL), services per conception (SPC), open days (OD), interval between labors (IBL), interval to first post-partum heat (IFPH), and interval to first postpartum service (IFPS). A mixed model was considered, which included the effects of number (NP), year (AP) and season (SP) of labor (using initials in Spanish), TL and agribusiness (AE), and the double significant interactions between these effects. Significant differences were obtained (p&#8804;0.05) in TL for the IFPH and IFPS indicators; the interaction of TL by AP, in addition to having an effect on these two variables, also influenced the AFB. The entrepreneurial TL presented lower IFPH and IFPS (63.8±6.2 and 75.7±5.5 d) than the transition TL (90.8±2.7 and 91.1±2.3 d). The reproductive behavior of cows in the two TLs was similar because there were no significant differences in AFB, SPC, OD and IBL.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[bovinos]]></kwd>
<kwd lng="es"><![CDATA[ganadería]]></kwd>
<kwd lng="es"><![CDATA[reproducción]]></kwd>
<kwd lng="es"><![CDATA[estratificación]]></kwd>
<kwd lng="en"><![CDATA[bovines]]></kwd>
<kwd lng="en"><![CDATA[stratification]]></kwd>
<kwd lng="en"><![CDATA[livestock production]]></kwd>
<kwd lng="en"><![CDATA[reproduction]]></kwd>
</kwd-group>
</article-meta>
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