<?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>S0065-17372015000200022</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Coloración aberrante (leucismo parcial) en el pinzón mexicano (Haemorhoxis mexicanus) en una zona urbana del centro de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Aberrant coloration (partial leucism) in the house finch (Haemorhous mexicanus) in an urban area of central Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Arrieta]]></surname>
<given-names><![CDATA[Rodrigo A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zuria]]></surname>
<given-names><![CDATA[Iriana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo de Ciencias Básicas e Ingeniería Centro de Investigaciones Biológicas]]></institution>
<addr-line><![CDATA[Pachuca Hidalgo]]></addr-line>
<country>México</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>31</volume>
<numero>2</numero>
<fpage>318</fpage>
<lpage>320</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0065-17372015000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0065-17372015000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0065-17372015000200022&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[We report the presence of a House Finch (Haemorhous mexicanus) with partial leucism in the city of Pachuca, Hidalgo. The individual was observed in two occasions interacting with other finches that had regular coloration. Pigment aberrations may help identify populations with genetic problems or populations facing chronic stress.]]></p></abstract>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Nota cient&iacute;fica</font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="4"><b>Coloraci&oacute;n aberrante (leucismo parcial) en el pinz&oacute;n mexicano (<i>Haemorhoxis mexicanus</i>) en una zona urbana del centro de M&eacute;xico</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="3"><b>Aberrant coloration (partial leucism) in the house finch (<i>Haemorhous mexicanus</i>) in an urban area of central Mexico</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>Rodrigo A. Gonz&aacute;lez&#45;Arrieta e Iriana Zuria*</b></font></p>      <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><i>Universidad Aut&oacute;noma del Estado de Hidalgo, Instituto de Ciencias B&aacute;sicas e Ingenier&iacute;a, Centro de Investigaciones Biol&oacute;gicas, Apartado Postal 69&#45;1, Pachuca, Hidalgo, C.P. 42001, M&eacute;xico.</i> &lt;<a href="mailto:izuria@uaeh.edu.mx">izuria@uaeh. edu.mx</a>&gt;.</font></p>  	    ]]></body>
<body><![CDATA[<p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2">Recibido: 24/03/2014.    <br> 	Aceptado: 23/02/2015.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>ABSTRACT</b></font></p>  	    <p align="justify"><font face="verdana" size="2">We report the presence of a House Finch <i>(Haemorhous mexicanus)</i> with partial leucism in the city of Pachuca, Hidalgo. The individual was observed in two occasions interacting with other finches that had regular coloration. Pigment aberrations may help identify populations with genetic problems or populations facing chronic stress.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2">La coloraci&oacute;n del plumaje de las aves est&aacute; determinada por dos pigmentos principales, la melanina y los carotenoides (van Grouw 2006), los cuales, junto con algunos efectos &oacute;pticos, son causantes de las distintas tonalidades existentes. En ocasiones se manifiestan coloraciones aberrantes en las plumas y otros tejidos que pueden deberse a factores gen&eacute;ticos (Sage 1962), alimenticios (Cestari &amp; Versnachi Vieira da Costa 2007), decoloraci&oacute;n por luz (van Grouw 2006) o enfermedades (Phillips 1954). El leucismo es uno de los problemas m&aacute;s comunes de coloraci&oacute;n aberrante y se define como la ausencia parcial o total de pigmentos (principalmente melanina) en el plumaje. En aves leuc&iacute;sticas, el dep&oacute;sito de melanina en las c&eacute;lulas de la pluma no ocurre debido a un trastorno hereditario en la transferencia del pigmento, resultando en una mayor o menor decoloraci&oacute;n (blanco) de las plumas de manera aleatoria. La decoloraci&oacute;n por leucismo tambi&eacute;n puede presentarse en la piel y otras estructuras descubiertas (van Grouw 2006). Una forma de distinguir el leucismo de otra coloraci&oacute;n aberrante como el albinismo radica en la presencia de pigmentos en el ojo: un organismo leuc&iacute;stico presenta coloraci&oacute;n normal en el ojo (van Grouw 2006).</font></p>  	    <p align="justify"><font face="verdana" size="2">Observamos un individuo del pinz&oacute;n mexicano (para la nomenclatura en espa&ntilde;ol se sigui&oacute; a Escalante <i>et al.</i> 1996) <i>Haemorhous mexicanus</i> (antes <i>Carpodacus mexicanus)</i> con leucismo parcial (<a href="#f1">Fig. 1</a>) en dos ocasiones (15 de noviembre de 2011 y 18 de enero de 2012) en la zona sur de la ciudad de Pachuca, Hidalgo. El individuo fue observado en un terreno bald&iacute;o (20&deg; 04'19.65" N, 98&deg; 44' 36.05" O) con construcciones abandonadas y basura. La vegetaci&oacute;n del sitio corresponde a herb&aacute;ceas y algunos &aacute;rboles aislados de pirul <i>(Schinus molle)</i> y la zona circundante presenta &aacute;reas agr&iacute;colas y vegetaci&oacute;n degradada.</font></p>  	    <p align="center"><font face="verdana" size="2"><a name="f1"></a></font></p>  	    ]]></body>
<body><![CDATA[<p align="center"><font face="verdana" size="2"><img src="/img/revistas/azm/v31n2/a22f1.jpg"></font></p>  	    <p align="justify"><font face="verdana" size="2">El individuo present&oacute; coloraci&oacute;n aberrante en las plumas de la cabeza, garganta, vientre, alas, dorso y cola, as&iacute; como en el pico y escamas de las patas; el ojo ten&iacute;a una coloraci&oacute;n regular (<a href="#f1">Fig. 1</a>). En ambas ocasiones el individuo se encontraba interactuando con otros de la misma especie con la pigmentaci&oacute;n habitual. No pudimos determinar el sexo por la ausencia de pigmentaci&oacute;n, aunque el leucismo parece ser m&aacute;s com&uacute;n en hembras que en machos (Bensch <i>et al.</i> 2000). En general, los individuos con pigmentaci&oacute;n regular son de color pardo&#45;gris&aacute;ceo con las partes inferiores fuertemente marcadas con estr&iacute;as m&aacute;s oscuras (<a href="#f1">Fig. 1</a>). Los machos presentan coloraci&oacute;n que va del amarillo hasta el rojo brillante en la cabeza, dorso, rabadilla y vientre (Hill 2002), aunque algunas hembras pueden presentar una ligera coloraci&oacute;n rojiza, nunca tan brillante como en los machos (Hill 1993).</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Haemorhous mexicanus</i> se distribuye ampliamente en Norteam&eacute;rica, desde el sur de Canad&aacute; hasta el sur de M&eacute;xico y habita generalmente en lugares &aacute;ridos y semi&aacute;ridos, espacios abiertos y ciudades (Nocedal 2011, Badyaev <i>et al.</i> 2012). A pesar de ser una especie com&uacute;n en Norteam&eacute;rica, no encontramos reportes publicados sobre coloraciones aberrantes para la especie en M&eacute;xico, aunque existen algunos reportes para Estados Unidos de Norteam&eacute;rica (Ross 1963), por ejemplo para Los &Aacute;ngeles, California (Swarth 1899) y Denver, Colorado (Bergtold 1913) y algunos reportes fotogr&aacute;ficos informales en internet.</font></p>  	    <p align="justify"><font face="verdana" size="2">La frecuencia de anormalidades o la presencia de cr&iacute;as con algunos defectos es generalmente m&aacute;s alta en sitios donde existen diferentes tipos de perturbaciones ambientales (e.g., Rollin 1953, Moller <i>et al.</i> 2007). Por ejemplo, hay diversos reportes de coloraci&oacute;n aberrante en aves de zonas urbanas (e.g., Rollin 1953, Hosner &amp; Lebbin 2006, Gon&ccedil;alves <i>et al.</i> 2008, L&oacute;pez&#45;Ortega &amp; Carb&oacute;&#45;Ram&iacute;rez 2010, Carb&oacute;&#45;Ram&iacute;rez <i>et al.</i> 2011) y se ha mencionado que estas aberraciones podr&iacute;an ser m&aacute;s comunes en lugares urbanizados que en lugares sin perturbaciones (Rollin 1953, Il'enko 1960, Moller &amp; Mousseau 2001). La presencia de coloraci&oacute;n aberrante en zonas urbanas puede deberse a factores como la modificaci&oacute;n de la dieta en estas zonas (Ruiz <i>et al.</i> 2002, Mennechez &amp; Clergeau 2006) que podr&iacute;a limitar la producci&oacute;n de alg&uacute;n pigmento, las mutaciones gen&eacute;ticas y tama&ntilde;os poblacionales peque&ntilde;os que favorecen la endogamia (Sage 1962, Bensch <i>et al.</i> 2000), la presencia de contaminantes (Moller &amp; Mousseau 2001), as&iacute; como diferencias en las tasas de depredaci&oacute;n, pudiendo ser m&aacute;s bajas que en sitios no urbanizados (Newhouse <i>et al.</i> 2008). Es importante monitorear este tipo de aberraciones ya que pueden aportar evidencia que permita identificar poblaciones expuestas a endogamia o a estr&eacute;s cr&oacute;nico por condiciones ambientales adversas (Bensch 2000).</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>AGRADECIMIENTOS</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Agradecemos el apoyo de FOMIX CONACyT proyecto 191908 "Diversidad Biol&oacute;gica del Estado de Hidalgo (tercera etapa)". R. Gonz&aacute;lez&#45;Arrieta agradece al CONACyT por la beca de maestr&iacute;a otorgada (no. 257168).</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>LITERATURA CITADA</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2"><b>Badyaev, A.V., Belloni, V. &amp; Hill, G. E.</b> 2012. House Finch <i>(Haemorhous mexicanus). In:</i> A. 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