<?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>2007-0705</journal-id>
<journal-title><![CDATA[Nova scientia]]></journal-title>
<abbrev-journal-title><![CDATA[Nova scientia]]></abbrev-journal-title>
<issn>2007-0705</issn>
<publisher>
<publisher-name><![CDATA[Universidad de La Salle Bajío A. C., Coordinación de Investigación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-07052018000100328</article-id>
<article-id pub-id-type="doi">10.21640/ns.v10i20.1335</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Crecimiento pre y posdestete de corderos Pelibuey en clima cálido húmedo]]></article-title>
<article-title xml:lang="en"><![CDATA[Pre- and postweaning growth of Pelibuey lambs in hot humid weather]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hinojosa Cuéllar]]></surname>
<given-names><![CDATA[José Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oliva Hernández]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres Hernández]]></surname>
<given-names><![CDATA[Glafiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Segura Correa]]></surname>
<given-names><![CDATA[José Candelario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Garduño]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Popular de la Chontalpa  ]]></institution>
<addr-line><![CDATA[Cárdenas Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Huimanguillo ]]></institution>
<addr-line><![CDATA[Huimanguillo Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Yucatán  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma Chapingo Unidad Regional Universitaria Sur Sureste ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>10</volume>
<numero>20</numero>
<fpage>328</fpage>
<lpage>351</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-07052018000100328&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-07052018000100328&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-07052018000100328&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  Introducción: En México, existe una demanda insatisfecha de carne de ovino, para subsanarla, es necesario estudiar los sistemas de producción y determinar los factores que los afectan. Los objetivos de este estudio fueron evaluar el efecto año de nacimiento (AN), tipo de nacimiento (TN), época de nacimiento (EN), sexo del cordero (SX) y número de parto (NP) sobre características de crecimiento pre y posdestete de corderos Pelibuey y 2) estimar la relación entre las características de crecimiento pre y posdestete.  Método: El estudio fue retrospectivo observacional con información productiva de una finca ovina localizada en el estado de Tabasco, México. El conjunto de datos provino de los registros productivos de 389 ovejas Pelibuey, correspondientes a 941 corderos de 629 partos. El modelo estadístico incluyó los efectos fijos de AN (2005 a 2008), TN (únicos y múltiples), EN (sequía, lluvias y nortes), NP (primíparas y multíparas) y SX (hembra y macho), y como efectos aleatorios madre dentro de AN y el error experimental. Se calcularon los coeficientes parciales de correlación de Pearson para todas las variables de respuesta. Las variables dependientes predestete fueron: peso al nacimiento (Pn), ganancia diaria de peso predestete ajustada a 60 d (Gan1) y peso al destete ajustado a 60 d de edad (Pda). Las variables dependientes posdestete fueron: ganancia diaria de peso posdestete ajustada (Gan2) y peso final ajustado a 106 d (Pfa). El peso final corresponde al último peso registrado en los registros productivos, tomado a una edad promedio de 165±49 d.  Resultados: Con excepción de TN y EN sobre ganancia diaria de peso posdestete ajustada a 106 d (Gan2) y peso final ajustado a 106 d posdestete (Pfa), todas las variables explicativas afectaron (P&#8804;0.05) las variables de respuesta predestete. El TN y EN afectaron el comportamiento predestete de los corderos (P&lt;0.01). Los corderos de nacimiento único presentaron mayores Pn, Gan1 y Pda (P&lt;0.01) comparado con corderos de nacimiento múltiple. Los corderos nacidos en lluvias y nortes tuvieron el mayor Pn (P&#8804;0.05), los nacidos en sequía y lluvias tuvieron mayor Gan1 y los nacidos en sequía mayor Pda (P&lt;0.01) con respecto a las otras EN. Los corderos machos mostraron mayor Pn, Pda, Gan1, Pfa y Gan2 respecto a las hembras (P&#8804;0.05). Corderos de madres multíparas tuvieron mejor comportamiento de crecimiento en todas las variables estudiadas respecto a los de primíparas (P&lt;0.01) con excepción de Gan2 (P&gt;0.05). Los coeficientes de correlación más altos (P&lt;0.01) fueron observados entre Gan1 con Pda y Gan2 con Pfa. Los coeficientes de correlación variaron de 0.27 a 0.88 entre las variables dependientes estudiadas (P&lt;0.01).  Conclusión: El AN afectó todas las variables predestete y posdestete. Sin embargo, no se detectó un año en donde todas las variables pre o posdestete fueran superiores o inferiores a la de otros AN. Los corderos únicos tuvieron mejor comportamiento productivo predestete que los múltiples. En la época de sequía el Pn de los corderos fue menor con respecto a las otras épocas. En nortes, los corderos tuvieron menor Gan1 y Pda comparado con las otras épocas. Los corderos machos fueron superiores en su comportamiento productivo predestete con respecto a las hembras. Los corderos provenientes de ovejas multíparas presentaron mejor eficiencia productiva predestete. En el comportamiento posdestete, Gan2 y Pfa no fueron afectados por el TN y EN. Gan2 fue afectada por NP. El Pn, Gan1 y Pda tuvieron una relación positiva con el Pfa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  Introduction: In Mexico, there is an unmet demand for sheep meat. To remedy this, it is necessary to study production systems and determine the factors affecting them. The objectives of this study were 1) to evaluate the effect of birth year (BY), type of birth (TB), lambing season (LS), lamb sex (LSX) and parity number (PN) on growth characteristics of pre-and postweaning of Pelibuey lambs and 2) to estimate the relationship among pre and postweaning growth characteristics.  Method: The study was retrospective observational with productive data of a sheep farm located in Tabasco, Mexico. The dataset include records from 389 Pelibuey ewes corresponding 941 lambs and 629 lambing. The statistical model included fixed effects of BY (2005 to 2008), TB (single and multiple), LS (dry, rainy and windy), LSX (female and male), PN (primiparous and multiparous), and as well as random effects dam within BY and experimental error. Partial correlation coefficients of Pearson for all response variables were analized. The pre-weaning dependent variables were: weight at birth (BW), average daily gain of adjusted pre-weaning weight to 60 (ADG1) and adjusted weight at weaning to 60 d of age (WWa). Postweaning dependent variables were: average daily gain of adjusted postweaning weight (ADG2) and adjusted final weight to 106 d (FWa). The final weight corresponds to the last weight recorded in productive records, taken at an average age of 165±49 d.  Results: With exception of TB and LS on ADG2 and FWa, all independent variables affected (P&#8804;0.05) the preweaning dependent variables. TB and LS affected the preweaning lamb performance (P&lt;0.01). Single lambs had higher BW, ADG1 and WWa (P &lt; 0.01) compared with multiple lambs. The lambs born in rainy and windy had higher BW (P&#8804;0. 05), born in dry and rains had greater ADG1 and those born in dry showed greater WWa (P &lt; 0.01) with respect to other LS. Male lambs had higher BW, WWa, ADG1, FWa and ADG2 than females (P&#8804;0.05). Lambs from multiparous ewes had better growth performance than lambs from primiparous ewes (P&lt;0.01) with exception of ADG2 (P&gt;0.05). The correlation coefficients more high (P &lt; 0.01) were observed between ADG1 with WWa and ADG2 with FWa. The correlation coefficients ranged from 0.27 to 0.88 between the dependent variables studied (P &lt; 0.01).  Conclusion: The YB affected all preweaning and postweaning variables. However, was not detected a year where all pre and postweaning variables were higher or lower than other BY. The single lambs had better preweaning performance than the multiple. In the dry season the BW of the lambs was lower with respect to other LS. In windy, the lambs had less ADG1 and WWa compared to other LS. Male lambs were higher in their preweaning performance with respect to females. Lambs from multiparous ewes had greater pre-weaning performance. In postweaning performance, ADW2 and FWa were not affected by the TB and LS. ADG2 was affected by PN. The BW, ADG1, WWa and ADG2 had a positive relationship with FWa.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[ovinos de pelo]]></kwd>
<kwd lng="es"><![CDATA[trópico húmedo]]></kwd>
<kwd lng="es"><![CDATA[lactancia]]></kwd>
<kwd lng="es"><![CDATA[finalización]]></kwd>
<kwd lng="en"><![CDATA[hair sheep]]></kwd>
<kwd lng="en"><![CDATA[humid tropic]]></kwd>
<kwd lng="en"><![CDATA[lactation]]></kwd>
<kwd lng="en"><![CDATA[fattening lamb]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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