<?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>0065-1737</journal-id>
<journal-title><![CDATA[Acta zoológica mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Zool. Mex]]></abbrev-journal-title>
<issn>0065-1737</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0065-17372018000100111</article-id>
<article-id pub-id-type="doi">10.21829/azm.2018.3412113</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variación estacional del contenido nutricional de la dieta del borrego cimarrón del desierto (Ovis canadensis weemsi), en Baja California Sur, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Seasonal variation of the nutritional content in the diet of the desert bighorn sheep (Ovis canadensis weemsi), in Baja California Sur, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero-Cárdenas]]></surname>
<given-names><![CDATA[Israel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-Cárdenas]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallina]]></surname>
<given-names><![CDATA[Sonia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corcuera]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Orduña]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tovar-Zamora]]></surname>
<given-names><![CDATA[Ivonne]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana  ]]></institution>
<addr-line><![CDATA[Xochimilco ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigaciones Biológicas del Noroeste ]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Ecología A. C.  ]]></institution>
<addr-line><![CDATA[Xalapa Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Metropolitana Departamento de Biología Área Ecología]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma de Baja California Sur Laboratorio de Nutrición y Morfofisiología Animal ]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></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>34</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0065-17372018000100111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0065-17372018000100111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0065-17372018000100111&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El borrego cimarrón (Ovis canadensis) es uno de los grandes ungulados silvestres nativos de Norte América. Es un herbívoro selectivo, que se alimenta de forrajes con valores altos en nutrientes. El objetivo de este estudio fue evaluar la variación estacional en la calidad nutricional de las especies consumidas por el borrego cimarrón en la Sierra El Mechudo, BCS México. Las muestras se recolectaron en las cuatro estaciones de los años 2010 y 2011, y para los análisis consideramos porcentajes de ceniza, proteína cruda (PC), fibra detergente neutra (FDN), fibra detergente ácida (FDA), extracto etéreo (EE) y digestibilidad in vitro de la materia seca (DIVMS). Se encontraron cambios estacionales en el contenido de nutrientes de las especies de plantas que se estudiaron. El mayor número de forrajes con altos porcentajes de nutrientes se encontró durante la primavera en Viscainoa geniculata (71.9% DIVMS), Buddleja corrugata (11.7% ceniza), Lysiloma candida (22.03% proteína cruda), Condalia globosa (56.9% FDA), Aristida adscensionis (80.2% FDN) y Bursera epinnata (5.3% EE). En invierno, los porcentajes más elevados de nutrientes fueron para Opuntia cholla (71.7% IVDMD), Fouquieria diguetii (16.04% PC), Bouteloua aristidoides (78.4% NDF) y Croton caboencis (5.7% EE). Mientras que para el verano y el otoño solo se encontraron dos especies con altos valores: L. candida (9.1% ceniza) y Krameria parvifolia (50.2% FDA). Con base en los dos indicadores de selección (Bonferroni e Ivlev) tres especies por año resultaron ser principalmente seleccionadas durante las diferentes estaciones. Caesalpinia placida fue la única especie seleccionada en los dos años, particularmente durante otoño e invierno. Encontramos que los principales nutrientes (ceniza o minerales, proteína cruda y extracto etéreo) del forraje consumido estuvieron asociados principalmente con la segunda etapa de la gestación (finales de verano y todo el otoño) y con la primera y segunda etapas del parto y lactancia (invierno y primavera). En la Sierra El Mechudo las hembras seleccionan especies de plantas de buena y mediana calidad, obteniendo de ellas la mejor combinación de nutrientes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Bighorn sheep (Ovis canadensis) is one of the largest native wild ungulates in North America. It is a selective herbivore, feeding on forage with high nutrient values. The aim of this study was to evaluate the seasonal variation in the nutritional quality of the species consumed by bighorn sheep in the Sierra El Mechudo, BCS Mexico. Samples were collected in the four seasons of 2010 and 2011, and for the analyses we consider percentages of ash, crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), ether extract (EE), and in vitro digestibility of dry matter (IVDMD). Seasonal changes were found in the nutrient content of plant species that were studied. The largest number of forages with high percentages of nutrients found in spring were for Viscainoa geniculata (71.9% IVDMD), Buddleja corrugata (11.7% ash), Lysiloma candida (22.03% crude protein), Condalia globosa (56.9% FDA), Aristida adscensionis (80.2% NDF) and Bursera epinnata (5.3% EE). In winter, the highest percentages of nutrients were for Opuntia cholla (71.7% IVDMD), Fouquieria diguetii (16.04% PC) Bouteloua aristidoides (78.4% NDF) and Croton caboencis (5.7% EE). While for the summer and fall only two species with high values were &#8203;&#8203;found: L. candida (9.1% ash) and Krameria parvifolia (50.2% FDA). Based on two selection indicators (Bonferroni and Ivlev) three species per year were found to be primarily selected during different seasons. Caesalpinia placida was the only species selected in the two years, particularly during autumn and winter. We found that the principal nutrients (ash or minerals, crude protein, ether extract) of forage consumed were associated mainly with the second stage of gestation (late summer and all autumn) and with the first and second stages of parturition and lactation (winter and spring). In the Sierra El Mechudo, females select plant species of good and medium quality, getting the best combination of nutrients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Análisis químicos proximales]]></kwd>
<kwd lng="es"><![CDATA[condición fisiológica]]></kwd>
<kwd lng="es"><![CDATA[energía]]></kwd>
<kwd lng="es"><![CDATA[extracto etéreo]]></kwd>
<kwd lng="es"><![CDATA[DIVMS]]></kwd>
<kwd lng="es"><![CDATA[fibras]]></kwd>
<kwd lng="es"><![CDATA[proteína cruda]]></kwd>
<kwd lng="en"><![CDATA[Crude protein]]></kwd>
<kwd lng="en"><![CDATA[energy]]></kwd>
<kwd lng="en"><![CDATA[ethereal extract]]></kwd>
<kwd lng="en"><![CDATA[fibers]]></kwd>
<kwd lng="en"><![CDATA[IVDMD]]></kwd>
<kwd lng="en"><![CDATA[physiological condition]]></kwd>
<kwd lng="en"><![CDATA[proximal chemical analyses]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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