<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282025000100030</article-id>
<article-id pub-id-type="doi">10.19136/era.a12n1.4245</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reliability and concordance of Schaeffer and Agarwal formulae for predicting crossbred dairy cattle weight]]></article-title>
<article-title xml:lang="es"><![CDATA[Fiabilidad y concordancia de las fórmulas de Schaeffer y Agarwal para predecir el peso de ganado lechero cruzado]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrasco-Guzman]]></surname>
<given-names><![CDATA[Marcos Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrientos-Medina]]></surname>
<given-names><![CDATA[Roberto Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arcos-Alvarez]]></surname>
<given-names><![CDATA[Darwin N]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pozo-Leyva]]></surname>
<given-names><![CDATA[Dixan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chay-Canul]]></surname>
<given-names><![CDATA[Alfonso Juventino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco Division Académica de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Yucatán Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[Othón P. Blanco Quintana Roo]]></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>12</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282025000100030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282025000100030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282025000100030&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The study was aimed to evaluate the reliability and concordance of the Schaeffer and Agarwal formulae for predicting body weight in Gyr (Holstein×Cebu) crossbred cows and heifers. Body weight (BW), heart girth (HG) and body length (BL) were recorded in 156 cows and 98 heifers. There was a strong positive correlation (p &lt; 0.0001) between BW observed and BW predicted using the Schaeffer and Agarwal formulae (r &#8805; 0.96 &#8804; 0.97). Although reliability and agreement were low, as indicated by the CCC values, they were higher for the Agarwal formula. The results suggest that BW predictions using the Agarwal formula are preferable to those using the Schaeffer formula. The results suggest that Agarwal's formula may be useful for estimating BW in crossbred cattle kept under humid tropical conditions in southeastern Mexico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio fue evaluar la fiabilidad y concordancia de las fórmulas de Schaeffer y Agarwal para predecir el peso corporal en vacas y novillas cruzadas Gyr (Holstein×Cebú). Se registró el peso vivo (PV), perímetro torácico (PT) y longitud corporal (LC) en 156 vacas y 98 vaquillas. Se obtuvo una fuerte correlación positiva (p &lt; 0.0001) entre el PV observado y el PV estimado mediante las fórmulas de Schaeffer y Agarwal (r &#8805; 0.96 &#8804; 0.97). Aunque la fiabilidad y la concordancia fueron bajas, como indican los valores de CCC, estas fueron mayores con la fórmula de Agarwal. Los resultados indican que las predicciones del PV con la fórmula de Agarwal son preferibles a las obtenidas con la fórmula de Schaeffer. Los resultados sugieren que la fórmula de Agarwal puede ser útil para estimar el PV en ganado cruzado mantenidos bajo condiciones de trópico húmedo en el sureste de México.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Liveweight]]></kwd>
<kwd lng="en"><![CDATA[biometric measures]]></kwd>
<kwd lng="en"><![CDATA[heifers]]></kwd>
<kwd lng="en"><![CDATA[tropics]]></kwd>
<kwd lng="es"><![CDATA[Peso vivo]]></kwd>
<kwd lng="es"><![CDATA[medidas biométricas]]></kwd>
<kwd lng="es"><![CDATA[terneras o vaquillas en zona tropical]]></kwd>
</kwd-group>
</article-meta>
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