<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532015000300737</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2015.07.003</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Dimorphism and population size of the Mexican redrump tarantula, Brachypelma vagans (Araneae: Theraphosidae), in Southeast Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Dimorfismos y tamaño de poblaciones de la tarántula de cadera roja Brachypelma vagans (Araneae: Theraphosidae), en el sureste de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hénaut]]></surname>
<given-names><![CDATA[Yann]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Machkour-M&#8217;Rabet]]></surname>
<given-names><![CDATA[Salima]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Weissenberger]]></surname>
<given-names><![CDATA[Holger]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojo]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,El Colegio de la Frontera Sur Laboratorio de Conducta Animal ]]></institution>
<addr-line><![CDATA[Chetumal Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A02">
<institution><![CDATA[,El Colegio de la Frontera Sur Laboratorio de Ecología Molecular y Conservación ]]></institution>
<addr-line><![CDATA[Chetumal Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Laboratorio de Análisis de Información Geográfica y Estadística  ]]></institution>
<addr-line><![CDATA[Chetumal Quintana Roo]]></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>86</volume>
<numero>3</numero>
<fpage>737</fpage>
<lpage>743</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532015000300737&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532015000300737&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532015000300737&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[As a general rule, spiders exhibit sexual dimorphism and their populations may differ in size according to season duration and resource availability. However, few studies have focused on dimorphism in tarantulas. Mexican redrump tarantulas, Brachypelma vagans , listed in CITES, have an exceptionally wide distribution. Surprisingly, there are no studies on the possible relationship between the abundance of tarantulas per population and the geographical areas where they are present, or on how the distribution pattern of this spider may affect individual morphological characteristics. Furthermore, there are no studies on sexual dimorphism within the genus Brachypelma . The aim of the study is to determine the existence of sexual and geographical dimorphism in populations of B. vagans . It was observed that the abundance of spiders per population may vary according to the geographical areas where they were recorded. In six localities in southern Mexico, we recorded morphological data on adult tarantulas. Sexual dimorphism was clearly observed at the site that presented numerous spiders characterized by much smaller females. Since the results of this study demonstrate differences in tarantula number of individuals per locality in southern Mexico, they make an important contribution to the conservation of this species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El dimorfismo sexual es muy común en las arañas, pero también existen diferencias morfológicas entre poblaciones en función de las temporadas y la disponibilidad en los recursos. Pocos estudios han analizado el dimorfismo en tarántulas. La tarántula mexicana de cadera roja Brachypelma vagans , listada en el CITES, presenta una distribución amplia. Sin embargo, se conoce poco sobre sus poblaciones por áreas geográficas y sobre cómo el patrón de distribución de estos organismos, puede afectar las características morfológicas individuales. Tampoco se ha estudiado el dimorfismo sexual en el género Brachypelma . Nuestro estudio se enfoca en determinar si existen dimorfismos sexual y geográfico en poblaciones específicas de B. vagans . Se observó que la abundancia de tarántulas encontradas por población suele ser diferente de acuerdo con las áreas geográficas donde fueron observadas. Registramos datos morfológicos de tarántulas adultas en 6 sitios geográficos distribuidos en el sureste de México. Encontramos dimorfismo sexual únicamente en un sitio que presenta un número de arañas muy alto y donde las hembras son más pequeñas que en otras localidades. Nuestros resultados, considerando la variación en número de individuos por localidades a lo largo del sureste mexicano, tienen consecuencias para la conservación de esta especie.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Brachypelma]]></kwd>
<kwd lng="es"><![CDATA[Tarántulas]]></kwd>
<kwd lng="es"><![CDATA[Densidad]]></kwd>
<kwd lng="es"><![CDATA[Morfometría]]></kwd>
<kwd lng="es"><![CDATA[Dimorfismo sexual]]></kwd>
<kwd lng="es"><![CDATA[Conservación]]></kwd>
<kwd lng="en"><![CDATA[Brachypelma]]></kwd>
<kwd lng="en"><![CDATA[Tarantulas]]></kwd>
<kwd lng="en"><![CDATA[Density]]></kwd>
<kwd lng="en"><![CDATA[Morphometry]]></kwd>
<kwd lng="en"><![CDATA[Sexual dimorphism]]></kwd>
<kwd lng="en"><![CDATA[Conservation]]></kwd>
</kwd-group>
</article-meta>
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