<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952016000801013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de la adición de extractos de taninos al inicio de la engorda en la carga por nemátodos en becerros en corral]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of tannin extract addition on the amount of nematodes found in feedlot calves at the beginning of the fattening process]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corona-Palazuelos]]></surname>
<given-names><![CDATA[Melissa B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murillo-Ayala]]></surname>
<given-names><![CDATA[Eva X.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-del Campo]]></surname>
<given-names><![CDATA[Nohemí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romo-Rubio]]></surname>
<given-names><![CDATA[Javier A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cervantes-Pacheco]]></surname>
<given-names><![CDATA[Billy J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gaxiola-Camacho]]></surname>
<given-names><![CDATA[Soila M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barajas-Cruz]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Sinaloa Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Ganadera Los Migueles, S.A. de C.V.  ]]></institution>
<addr-line><![CDATA[Culiacán Sinaloa]]></addr-line>
<country>México</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>50</volume>
<numero>8</numero>
<fpage>1013</fpage>
<lpage>1025</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952016000801013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952016000801013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952016000801013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las enfermedades ocasionadas por nemátodos afectan la salud y productividad de becerros en engorda. El consumo de plantas con taninos reduce la carga por nemátodos de rumiantes en pastoreo, pero hay poca información relacionada con el efecto de la adición de extractos de taninos (ET) a la dieta en la carga de nemátodos de becerros en corral. El objetivo de este estudio fue evaluar la influencia de la adición de ET en la carga por nemátodos en becerros al inicio de la engorda en corral. Experimento 1. Treinta becerros Brahman (227±13.9 kg) se alojaron en seis corraletas (6×12 m) con 24 m2 techo, 2.4 m de comedero y 0. 6 m de bebedero. El diseño experimental fue completamente al azar y los tratamientos fueron: 1) 0 % de ET (Testigo), 2) 6 g kg-1 MS ET condensados (TC), y 3) 6 g kg-1 MS de ET hidrolizables (TH). Muestras de heces se recolectaron 3 d antes y 3 d después de aplicar los tratamientos por 28 d. Los valores de los huevos por gramo de heces (hgh) fueron transformados a log10(n+40), y se analizaron por ANDEVA. Los TH disminuyeron en 58 % (p=0.10) los hgh de Haemonchus spp. Experimento 2. Con base en los resultados del Experimento 1, se duplicó el número de unidades experimentales y se aumentó 2.5 veces para probar la ausencia de efecto de TH en la excreción de huevos de Cooperia spp. El diseño experimental fue completamente al azar y se usaron 40 becerros Brahman (212±8.8 kg) alojados en ocho corraletas y los tratamientos fueron: 1) 0 % de ET (Testigo), y 2) 15 g kg-1 MS de TH. El procedimiento fue similar al Experimento 1, los valores de hgh fueron transformados a Log10 (n+17), y se realizó un ANDEVA. La adición de 15 g kg-1 MS de TH disminuyó (p&#8804;0.05) en 61 y 68 % la cantidad de hgh de Haemonchus sp y de Cooperia sp, respectivamente. Los resultados sugieren que la inclusión de extracto de taninos hidrolizables en la dieta puede ser una alternativa sustentable para el control de nemátodos como Haemonchus en bovinos en engorda.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The diseases caused by nematodes affect the health and productivity of feedlot calves. The consumption of plants containing tannins reduce the burden caused by nematodes in grazing ruminants, but there is little information related to how the addition of tannin extracts (TE) to the diet of feedlot calves diet affects the amount of nematodes. The objective of this study was to evaluate the influence of TE addition on the amount of nematodes in calves at the beginning of the fattening process. Experiment 1: Thirty Brahman calves (227±13.9 kg) were housed in six pens (6×12 m) with 24 m2 roof, 2.4 m feed bunker, and a 0.6 m water trough. The experimental design was completely randomized and the treatments were: 1) 0 % of TE (control), 2) 6 g kg-1 DM TE condensed (TC), and 3) 6 g kg-1 DM of hydrolysable TE (TH). Feces samples were collected: 3 d before and 3 d after administering the treatment for 28 d. The value of the eggs per gram of feces (EGF) was transformed to Log10 (n+40), and was analyze using ANOVA. The TH decreased the EGF of Haemonchus spp by 58 % (p=0.10). Experiment 2: Using results of Experiment 1 as a base, the number of experimental units was duplicated and was increased 2.5 times to test the absence of the effect of TH in the egg excretion of Cooperia. The experimental design was completely randomized and we used 40 Brahman calves (212±8.8 kg), kept in 8 pens. The treatments were as follows: 1)0% de TE (Control), and 2) 15 g kg-1 DM ofT H. The procedure was similar to experiment 1, the EGF values were transformed to Log10 (n+17), and an ANOVA was carried out. The addition of 15 g kg-1 DM of TH decreased (p&#8804;0.05) the amount of EGF of Haemonchus sp and Cooperia sp, by 61 and 68 % respectively. The results suggest that including the hydrolysable tannin extracts into the calves&#8217; diets could be a sustainable alternative for controlling nematodes like Haemonchus in feedlot cattle.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Becerros]]></kwd>
<kwd lng="es"><![CDATA[extractos de taninos]]></kwd>
<kwd lng="es"><![CDATA[nemátodos]]></kwd>
<kwd lng="es"><![CDATA[engorda]]></kwd>
<kwd lng="en"><![CDATA[Calves]]></kwd>
<kwd lng="en"><![CDATA[tannin extracts]]></kwd>
<kwd lng="en"><![CDATA[nematodes]]></kwd>
<kwd lng="en"><![CDATA[fattening]]></kwd>
</kwd-group>
</article-meta>
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