<?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>S2007-90282016000300407</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Body fat reserves and their relationship to ultrasound back fat measurements in Pelibuey ewes]]></article-title>
<article-title xml:lang="es"><![CDATA[Reservas corporales de grasa y su relación con la grasa subcutánea medida por ultrasonido en ovejas Pelibuey]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chay-Canul]]></surname>
<given-names><![CDATA[Alfonso J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Herrera]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meza-Villalvazo]]></surname>
<given-names><![CDATA[Victor M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gomez-Vazquez]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Hernandez]]></surname>
<given-names><![CDATA[Aldenamar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Magaña-Monforte]]></surname>
<given-names><![CDATA[Juan G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ku-Vera]]></surname>
<given-names><![CDATA[Juan G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,2Universidad del Papaloapan Instituto de Biotecnología ]]></institution>
<addr-line><![CDATA[ Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Yucatán Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>3</volume>
<numero>9</numero>
<fpage>407</fpage>
<lpage>413</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282016000300407&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282016000300407&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282016000300407&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: This study was conducted to evaluate body fat reserves (BFD) and their relationship to ultrasound back fat thickness (BFT) measurements in twenty Pelibuey ewes. The BFT was determined 24 h before slaughter using real-time ultrasound equipment with a 6/8 MHz probe. At slaughter, internal fat (TIF) was dissected and weighed. The carcasses were split into two halves, weighed and chilled (6°C for 24 h). The left half-carcasses were completely dissected into muscle, bone and subcutaneous and intermuscular fat (carcass fat, TCF), and weighed separately. The r values for BFT and BFD ranged from 0.39 to 0.72. Regression equations between BFT and BFD had an R2 ranging from 0.15 to 0.52. Using BFT to predict BFD in Pelibuey ewes was poorly correlated.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El estudio se realizó para evaluar las reservas corporales de grasa (DCG) y su relación con el espesor de la grasa subcutánea (EGS) medido con ultrasonido en 20 ovejas Pelibuey. EL EGS se determinó utilizando un equipo de ultrasonido en tiempo real con sonda de 6/8 MHz. Al sacrificio, la grasa interna (TIF) fue disecada y pesada; la canal se dividió en dos mitades, se pesaron y refrigeraron (6° C durante 24 h). La media canal izquierda se diseccionó en: músculo, hueso y grasa subcutánea e intermuscular (grasa de la canal, TCF), y fueron pesados por separado. Los valores de r para EGS y DCG variaron de 0.39 a 0.72. Las ecuaciones de regresión entre EGS y DCG tuvieron un R2 que varió de 0.15 a 0.52. El uso del EGS para predecir DCG en ovejas Pelibuey fue pobremente correlacionada.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Pelibuey ewes]]></kwd>
<kwd lng="en"><![CDATA[body condition]]></kwd>
<kwd lng="en"><![CDATA[back fat thickness]]></kwd>
<kwd lng="en"><![CDATA[energy reserves]]></kwd>
<kwd lng="en"><![CDATA[ultrasound]]></kwd>
<kwd lng="es"><![CDATA[Ovejas Pelibuey]]></kwd>
<kwd lng="es"><![CDATA[condición corporal]]></kwd>
<kwd lng="es"><![CDATA[espesor de la grasa subcutánea]]></kwd>
<kwd lng="es"><![CDATA[reservas energéticas]]></kwd>
<kwd lng="es"><![CDATA[ultrasonido]]></kwd>
</kwd-group>
</article-meta>
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