<?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>S2007-11242020000200455</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v11i2.4885</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comparación de la castración quirúrgica al nacimiento versus inmunocastration sobre las características de la canal y carne en machos Holstein]]></article-title>
<article-title xml:lang="en"><![CDATA[Comparison of surgical castration at birth versus immunocastration on carcass and meat traits in growing Holstein males]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cervantes-Cazares]]></surname>
<given-names><![CDATA[Jorge A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Linares]]></surname>
<given-names><![CDATA[Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Figueroa-Saavedra]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tamayo-Sosa]]></surname>
<given-names><![CDATA[Alma R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barreras-Serrano]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos-Rincón]]></surname>
<given-names><![CDATA[Francisco G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-López]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Reynoso]]></surname>
<given-names><![CDATA[Issa C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza Peraza]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León Villanueva]]></surname>
<given-names><![CDATA[Angelina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Vega]]></surname>
<given-names><![CDATA[Luis A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Baja California Instituto de Investigaciones en Ciencias Veterinarias ]]></institution>
<addr-line><![CDATA[Mexicali Baja California]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Ganadera Mexicali, S.A. de C.V  ]]></institution>
<addr-line><![CDATA[ Baja California]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>455</fpage>
<lpage>467</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242020000200455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242020000200455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242020000200455&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue comparar el efecto de la castración quirúrgica al nacimiento vs immunocastración, sobre las características de la canal y carne en machos Holstein en engorda; se utilizaron 720 machos Holstein aproximadamente de 7 a 8 meses de edad con peso inicial de 240.82 kg. Se formaron 2 tratamientos con 4 corrales de 90 animales en cada uno: toros castrados quirúrgicamente que fueron castrados 24 h después del nacimiento y toros inmunocastrados vacunados con Bopriva aplicando cuatro dosis, al día 1, 21, 101 y 181 de engorda. Se tomaron pesos individuales en cada vacunación. Los animales se sacrificaron a los 242 días de engorda. A partir de la segunda vacunación se observaron diferencias (P&lt;0.05) en pesos, presentando valores mas altos los animales castrados quirúrgicamente. El peso final al sacrificio, peso de la canal caliente, peso de la canal fría, espesor de grasa dorsal y área del ojo de la costilla fueron diferentes (P&lt;0.05) entre tratamientos, observando valores más altos en los machos castrados quirúrgicamente. En la carne, el pH y EC fueron similares (P&gt;0.05) entre tratamientos mientras que los valores de b*, C* y H* fueron más altos (P&lt;0.05) en los animales inmunocastrados. Para fines de producción, el sacrificar los machos Holstein al nacimiento, se obtienen animales más pesados y con mejores características en la canal; sin embargo es importante evaluar el impacto del bienestar animal por la castración al nacimiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Castration of male cattle affects carcass and meat traits. An evaluation was done of the effect of surgical castration at birth and immunocastration on carcass and meat traits in 7-8-mo-old male Holstein calves (average weight= 240.8 kg). Animals in the surgical castration treatment were castrated 24 h after birth, while those in the immunocastration treatment were administered doses of the Bopriva vaccine at 1, 21, 101 and 181 d of growth. Live weight was recorded in both groups at 21, 101 and 181 d, and carcass and meat traits were quantified after slaughter. The surgically-castrated animals exhibited higher average weight (P&lt;0.05), and higher weight at slaughter. Cold carcass weight, hot carcass weight, ribeye area and subcutaneous fat thickness were all higher in the surgically-castrated animals (P&lt;0.05). No differences between treatments were found in meat pH and sheer force (P&gt;0.05), but the b*, C* and H* values were higher in the IC animals (P&lt;0.05). Castration at birth resulted in better average carcass weight and meat traits than immunocastration, but animal welfare must be considered when using surgical castration.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Inmunocastración]]></kwd>
<kwd lng="es"><![CDATA[Machos Holstein]]></kwd>
<kwd lng="es"><![CDATA[Evaluación de la canal]]></kwd>
<kwd lng="en"><![CDATA[Inmunocastration]]></kwd>
<kwd lng="en"><![CDATA[Holstein males]]></kwd>
<kwd lng="en"><![CDATA[Carcass evaluation]]></kwd>
</kwd-group>
</article-meta>
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