<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242025000600002</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v16s4.6725</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del peso de la vaca sobre la eficiencia productiva al destete en vacas Brahman]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of cow weight on production efficiency at weaning in Brahman cows]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lepe-Anasagasti]]></surname>
<given-names><![CDATA[Itziar Eukene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Torres]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mansur-Domínguez]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Canseco-Sedano]]></surname>
<given-names><![CDATA[Rodolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vega-Murillo]]></surname>
<given-names><![CDATA[Vicente Eliezer]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Veracruz Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>16</volume>
<fpage>1</fpage>
<lpage>10</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242025000600002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242025000600002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242025000600002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Con el objetivo de evaluar la eficiencia productiva de vacas Brahman en función de su tamaño corporal al momento del destete; se utilizaron los registros de 765 vacas Brahman. Todos los animales se mantuvieron en pastoreo extensivo con el mismo manejo durante el periodo predestete. Las variables de respuesta analizadas fueron el peso al destete de la cría ajustada a 205 días (PA205), el peso de la vaca al destete (PVD) y la medida de eficiencia al destete utilizada fue (PA205/PVD) * 100 (WWR). Los análisis del PVD, PA205 y WWR, se realizaron con PROC GLM de SAS. Los análisis incluyeron el efecto del grupo de peso de la vaca (ligeras, moderadas y pesadas), los efectos de año (1998 - 2019) y mes (noviembre, diciembre, enero y febrero) de nacimiento de la vaca y la edad de la vaca al parto (2-8). Para PVD se encontraron diferencias (P&lt;0.01) entre los tres niveles de peso de las vacas. Las vacas del grupo pesadas fueron 19 y 10 % más pesadas (P&lt;0.01) que las vacas de los grupos ligeras y moderadas. Todas las correlaciones estimadas fueron significativas (P&lt;0.05) con la excepción de la correlación entre PA205 y PVD en el grupo de vacas pesadas. Las vacas más eficientes al destete fueron aquellas que tuvieron pesos al destete más ligeros. La utilización de WWR como medida de eficiencia debe tomarse con cuidado dado que no considera posibles incrementos en el consumo de alimento o producción de leche.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In order to evaluate the productive efficiency of Brahman cows based on their body size at weaning, the records of 765 Brahman cows were used. All animals were kept in extensive grazing with the same management during the preweaning period. The response variables analyzed were the adjusted 205-d weaning weight of the calf (AW205), the cow weaning weight (CWW), and the weaning efficiency measure used was (AW205/CWW) * 100 (WWR). The analyses of CWW, AW205, and WWR were performed with PROC GLM of SAS. Analyses included the effect of cow weight group (light, moderate, and heavy), the effects of the year (1998-2019) and month (November, December, January, and February) of cow birth, and cow age at calving (2-8). For CWW, there were differences (P&lt;0.01) between the three weight levels of the cows. Cows in the heavy group were 19 and 10 % heavier (P&lt;0.01) than cows in the light and moderate groups. All estimated correlations were significant (P&lt;0.05), except for the correlation between AW205 and CWW in the heavy cow group. The most efficient cows at weaning were those with lighter weaning weights. WWR, as an efficiency measure, should be used cautiously as it does not consider possible increases in feed intake or milk production.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Brahman]]></kwd>
<kwd lng="es"><![CDATA[Peso vaca]]></kwd>
<kwd lng="es"><![CDATA[Eficiencia destete]]></kwd>
<kwd lng="en"><![CDATA[Brahman]]></kwd>
<kwd lng="en"><![CDATA[Cow weight]]></kwd>
<kwd lng="en"><![CDATA[Weaning efficiency]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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