<?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>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562021000100036</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v23i1.1275</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia del nivel nutricional sobre la calidad seminal y el comportamiento sexual de los machos cabríos tratados con días largos artificiales]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of nutritional level on seminal quality and sexual behavior of male goats treated with artificial long days]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores Nájera]]></surname>
<given-names><![CDATA[Manuel de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosales Nieto]]></surname>
<given-names><![CDATA[Cesar Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vélez Monroy]]></surname>
<given-names><![CDATA[Leonardo Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez Solís]]></surname>
<given-names><![CDATA[Adán Ulises]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental La Laguna ]]></institution>
<addr-line><![CDATA[Matamoros Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de San Luis Facultad de Agronomía y Veterinaria ]]></institution>
<addr-line><![CDATA[ San Luís Potosí]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental Bajío ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>23</volume>
<numero>1</numero>
<fpage>36</fpage>
<lpage>44</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562021000100036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562021000100036&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562021000100036&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para evaluar si el nivel nutricional modifica la calidad seminal y el comportamiento sexual de los machos cabríos tratados con días largos artificiales. Diez y seis machos cabríos fueron divididos en dos tratamientos difiriendo en su nivel alimenticio. Un grupo de machos recibió el 75 % de sus requerimientos nutricionales de mantenimiento y reproducción (G-75; n=8), mientras que otro grupo recibió el 120 % (G-120; n=8). La circunferencia escrotal fue menor en el grupo G-75 que la registrada en el grupo G-120 (P &lt; 0.01). Similarmente, el volumen de eyaculado y el número total de espermatozoides por eyaculado fueron menores en el grupo G-75 (0.5 ± 0.05 mL y 1.9 x 109, respectivamente) que en el grupo G-120 (0.7 ± 0.1 mL y 3.0 x 109, respectivamente; P &lt; 0.001). La motilidad espermática fue menor en el grupo G-75 (2.6 ± 0.1), que en el grupo G-120 (3.2 ± 0.1; P &lt; 0.001). La latencia a la eyaculación fue mayor en los machos del grupo G-75, que la registrada en el grupo G-120 (P &lt; 0.001). Los resultados del presente estudio demuestran que, en los machos cabríos criollos tratados con 2.5 meses de días largos artificiales, la reducción de un 25% de sus requerimientos nutricionales afectó la calidad seminal y la latencia a la eyaculación durante el periodo de reposo sexual.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective was to determine if the nutritional level reduces seminal quality and sexual behavior of the male goats treated with artificial long days. Sixteen male goats were divided into two treatments differing in their nutritional level. A group of males received 75 % of their maintenance and reproduction nutritional requirements (G-75; n=8), while another group received 120 % (G-120; n=8). The results shown that scrotal circumference was lower in the G-75 group, than that of group G-120 (P &lt;0.01). Similarly, the ejaculate volume and total number of sperm per ejaculate were lower in the G-75 group (0.5 ± 0.05 mL and 1.9 x 109, respectively) than in the G-120 group (0.7 ± 0.1 mL and 3.0 x 109, respectively; P &lt;0.001). Sperm motility was lower (P &lt;0.001) in the G-75 group (2.6 ± 0.1) than in the G-120 group (3.2 ± 0.1). The ejaculation latency was higher in males of the G-75 group than that registered in the G-120 group (P &lt;0.001). The results of the present study demonstrate that, in creole male goats treated with 2.5 months of artificial long days, and a 25% reduction in their nutritional requirements, affected seminal quality and latency to ejaculation during the natural nonbreeding season.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Machos cabríos]]></kwd>
<kwd lng="es"><![CDATA[Comportamiento sexual]]></kwd>
<kwd lng="es"><![CDATA[Nutrición]]></kwd>
<kwd lng="es"><![CDATA[Días largos artificiales]]></kwd>
<kwd lng="es"><![CDATA[Calidad seminal]]></kwd>
<kwd lng="en"><![CDATA[Male goats]]></kwd>
<kwd lng="en"><![CDATA[Sexual behavior]]></kwd>
<kwd lng="en"><![CDATA[Nutrition]]></kwd>
<kwd lng="en"><![CDATA[Artificial long-days]]></kwd>
<kwd lng="en"><![CDATA[Seminal quality]]></kwd>
</kwd-group>
</article-meta>
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