<?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>S0065-17372017000300431</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Morphological dimorphism varies across the endemic Xantus&#8217; hummingbird (Hylocharis xantusii) genetic populations in the Baja California Peninsula]]></article-title>
<article-title xml:lang="es"><![CDATA[El dimorfismo morfológico varía en las poblaciones genéticas del colibrí de Xantus (Hylocharis xantusii) endémico de la Península de Baja California]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Rubio Sanvicente]]></surname>
<given-names><![CDATA[Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-de León]]></surname>
<given-names><![CDATA[Francisco J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Estrella]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigaciones Biológicas del Noroeste  ]]></institution>
<addr-line><![CDATA[La Paz BCS]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigaciones Biológicas del Noroeste  ]]></institution>
<addr-line><![CDATA[La Paz BCS]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<fpage>431</fpage>
<lpage>442</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0065-17372017000300431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0065-17372017000300431&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0065-17372017000300431&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Morphological dimorphism traits play an important role in our understanding of species evolution. In birds, sexual dimorphism occurs in a number of characteristics, such as body and shape size, wing and bill morphology. Hylocharis xantusii is the only hummingbird species endemic to the Baja California Peninsula, Mexico that has adapted to xeric conditions, associated to oases regions, and displays a sexual dimorphism on color pattern. We quantified morphological variation between males and females to determine whether morphological traits have a significant contribution to sexual dimorphism, and we analyzed if differences in morphological patterns among genetic populations of Xantus&#8217; hummingbird existed. A morphological dimorphism was found in four of six traits analyzed, males were bigger in size (total length) with larger wings (wing chord and tail length) and wider bills (bill width). Differences in morphological traits of genetic populations were found. Individuals of southern population were in average smaller than central and northern populations while individuals from central populations had larger bills and wing chords. Northern populations had longer tails and wider bills. The results indicated that populations and sex are independent to morphological differences in Xantus&#8217; hummingbird. The best fitted GLM shows that the altitude and oasis location related to the genetic population correctly explains the differences in tail, wing chord and bill width traits of hummingbirds along the Baja California Peninsula. We suggest that local conditions related to environmental heterogeneity and oases distribution are promoting levels of morphological differentiation. Genetic populations were already known to be result of their evolutionary history, of the phylogeographic pattern. Sexual dimorphism on morphological traits observed in H. xantusii is related in first place to ecological differences among oases, and second, related to mating and social behavior.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El dimorfismo morfológico juega un importante papel en el entendimiento de la evolución de las especies. En aves, el dimorfismo sexual ocurre en un número de características, como el tamaño y forma del cuerpo, y la morfología de las alas y pico. Hylocharis xantusii es la única especie de colibrí endémica de la Península de Baja California, México, que se ha adaptado a condiciones xéricas y que además exhibe un marcado dimorfismo sexual en su patrón de coloración. En este estudio se cuantificó la variación morfológica entre machos y hembras para analizar si los rasgos morfológicos tienen una contribución significativa al dimorfismo sexual; además se determinó si existen diferencias en el patrón morfológico entre las poblaciones de la especie. Se observó dimorfismo sexual en cuatro de los seis rasgos analizados en este trabajo; los machos fueron más grandes en tamaño (largo total), con alas más largas (cuerda alar y largo de cola) y pico más ancho. Se observaron diferencias morfológicas entre las poblaciones genéticas de H. xantusii; los colibríes de la población sur fueron en promedio más pequeños que los de las poblaciones centrales y norteñas, mientras que los individuos de la población central tuvieron picos más largos, así como cuerdas alares más largas. Las poblaciones del norte tuvieron colas más largas y picos más anchos. Los resultados obtenidos indicaron que las poblaciones y el sexo influyen independientemente en las diferencias morfológicas del colibrí de Xantus. El mejor modelo GLM obtenido muestra que la altitud y la localidad de los oasis relacionada a la población genética, explican significativamente las diferencias en la longitud de la cola y cuerda alar así como del ancho del pico de los colibrís a lo largo de la península de Baja California. Se sugiere que las condiciones locales relacionadas con la heterogeneidad ambiental y la distribución de los oasis están promoviendo niveles de diferenciación morfológica. Las poblaciones genéticas por otro lado, se sabía previamente eran resultado de su historia evolutiva, de su patrón filogeográfico. El dimorfismo sexual en los rasgos morfológicos de H. xantusii podría estar relacionado en primer lugar, a las diferencias ecológicas entre los oasis, y segundo, relacionado con el apareamiento y comportamiento social.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Hylocharis xantusii]]></kwd>
<kwd lng="en"><![CDATA[Baja California Peninsula]]></kwd>
<kwd lng="en"><![CDATA[morphological dimorphism]]></kwd>
<kwd lng="es"><![CDATA[Hylocharis xantusii]]></kwd>
<kwd lng="es"><![CDATA[Península de Baja California]]></kwd>
<kwd lng="es"><![CDATA[dimorfismo morfológico]]></kwd>
</kwd-group>
</article-meta>
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