<?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>2007-3364</journal-id>
<journal-title><![CDATA[Therya]]></journal-title>
<abbrev-journal-title><![CDATA[Therya]]></abbrev-journal-title>
<issn>2007-3364</issn>
<publisher>
<publisher-name><![CDATA[Asociación Mexicana de Mastozoología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33642015000200421</article-id>
<article-id pub-id-type="doi">10.12933/therya-15-223</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución potencial de la rata magueyera ( Neotoma leucodon Merriam 1984) y densidad de madrigueras en el sur del desierto chihuahuense]]></article-title>
<article-title xml:lang="en"><![CDATA[Potential distribution of the white-tooted woodrat (Neotoma leucodon Merriam 1984) and nest density in the southern Chihuahuan Desert]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Calderas]]></surname>
<given-names><![CDATA[Jesús Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palacio-Núñez]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clemente-Sánchez]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Montoya]]></surname>
<given-names><![CDATA[Juan Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Rojas]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olmos-Oropeza]]></surname>
<given-names><![CDATA[Genaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus San Luis Potosí ]]></institution>
<addr-line><![CDATA[Salinas de Hidalgo S.L.P.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Centro de Investigaciones Biológicas Instituto de Ciencias Básicas e Ingeniería]]></institution>
<addr-line><![CDATA[Pachuca Hidalgo]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>6</volume>
<numero>2</numero>
<fpage>421</fpage>
<lpage>433</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33642015000200421&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33642015000200421&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33642015000200421&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  INTRODUCCIÓN: La rata magueyera es una especie clave para diversos procesos ecológicos. Es considerada un manjar y ha sido aprovechada sin control. Este trabajo se realizó con la finalidad de determinar su distribución potencial y evaluar su densidad con base en las madrigueras, así como las variables de mayor influencia.  MATERIAL Y MÉTODO: El área de estudio fue de 88,338.4 km2, y fue dividida en una rejilla de 7,962 cuadros de 5 x 5 km, de los cuales se muestrearon 233. En el centroide de cada cuadro se trazó una parcela rectangular de 10 x 100 m, donde se tomaron datos de las variables del hábitat: tipo de suelo, tipo de vegetación, pendiente, altitud, y presencia de madrigueras activas.  RESULTADOS: Se localizaron 69 sitios con presencia de rata y con estos datos se obtuvieron valores de densidad, así como un modelo de distribución potencial con el programa Maxent usando 25 variables predictivas. El modelo (AUC = 0.920 ± 0.017) mostró una área de 60,766 km2 (68.8 %) donde la densidad promedio fue de 545 madrigueras/km2.  DISCUSIÓN Y CONCLUSIONES: Las principales variables que determinaron su distribución fueron: tipo de suelo y de vegetación, cobertura vegetal, pendiente y orientación, así como dos variables bioclimáticas derivadas de la precipitación y tres de temperatura. El hábitat potencial estuvo marcadamente influido por el tipo de suelo y de vegetación. La densidad de madrigueras fue baja comparándola con lo encontrado en otros sitios. Su situación poblacional podría considerarse preocupante, por lo que es necesario realizar evaluaciones más extensas de la población, incluyendo su uso como recurso alimenticio para un posible manejo de su uso.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  INTRODUCTION: The white-tooted woodrat (Neotoma leucodon) is keystone in a variety of ecological processes. However, this specific rodent is considered a delicacy in the Southern region of the Chihuahuan Desert, which has resulted in uncontrolled exploitation. To date there are no studies to determine its population status, and it is not protected by the Mexican law. The objective of this study was to model the potential distribution of this species in the Southern Chihuahuan Desert, and to estimate the current population density.  METHODS: The study area includes 12 Physiograpics Subprovinces (PSP), which cover the Southern portion of the Chihuahuan Desert, located in North-central Mexico. The initial study area has 88,338.4 km2, which we divided into a grid of 5 x 5 square km, obtaining 7,692 squares of which 233 were sampled. We draw rectangular quadrants of 10 x 100 m in the centroid of each square, where we collected the following habitat variables: soil type, vegetation type, slope, altitude, and presence of active nests. We obtained the nest density and a potential distribution model using Maxent, which included 25 predictive variables.  RESULTS: We found evidence of the presence of the white-tooted woodrat in 69 sites. We located the species mainly in low terrain slopes with an altitude range of 1,701- 2,100 m. The results also indicate higher abundance in Xerosol soil associated with microphyllous desert scrub. The potential distribution area found was 60,766 km2 (68.8 %), in which the distribution probability was low (27.3 %), medium (25.4 %), and high (16.1 %). The average nest density was 545 km2. The variables that best explained the model of potential distribution (AUC 0.920 ± 0.017) were: soil type, vegetation type, vegetation cover, slope, aspect, two bioclimatic variables of precipitation, and three bioclimatic variables of temperature.  DISCUSSION AND CONCLUSIONS: The distribution and abundance of small mammal populations often depend on interactions between environmental variables. In our study, the main habitat variables coincided with those found in other studies. The potential distribution was restricted to the Northern and central portions of the study area. Soil type, vegetation type and vegetation cover markedly influenced the potential habitat for the establishment of nests. Wright (1972) mentions that an increment of vegetation cover rises the density of rats, but only when the plants they eat are abundant, which in turn causes an increase in the number of nests. Nest density was low compared to other sites. The status of the population is worrisome; it is necessary to do more assessments on the species distribution and on its use as food source for the local people.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Abundancia poblacional]]></kwd>
<kwd lng="es"><![CDATA[ambientes semiáridos]]></kwd>
<kwd lng="es"><![CDATA[Maxent]]></kwd>
<kwd lng="es"><![CDATA[tipo de suelo]]></kwd>
<kwd lng="es"><![CDATA[tipo de vegetación]]></kwd>
<kwd lng="en"><![CDATA[Maxent]]></kwd>
<kwd lng="en"><![CDATA[population abundance]]></kwd>
<kwd lng="en"><![CDATA[semiarid environments]]></kwd>
<kwd lng="en"><![CDATA[signs]]></kwd>
<kwd lng="en"><![CDATA[soil type]]></kwd>
<kwd lng="en"><![CDATA[vegetation type]]></kwd>
<kwd lng="en"><![CDATA[wild rodents]]></kwd>
</kwd-group>
</article-meta>
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</ref-list>
</back>
</article>
