<?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>0120-548X</journal-id>
<journal-title><![CDATA[Acta Biológica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta biol.Colomb.]]></abbrev-journal-title>
<issn>0120-548X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-548X2012000100015</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[TEMPORAL VARIATION IN THE ABUNDANCE OF Poblana alchichica IN NEAR-SHORE HABITAT OF THE HIGH ELEVATION LAKE, LAGO DE ALCHICHICA, PUEBLA, MEXICO]]></article-title>
<article-title xml:lang="es"><![CDATA[Variación temporal en la abundancia de Poblana alchichica en un hábitat ribereño del lago de alta elevación, Lago de Alchichica, Puebla, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[WOOLRICH-PIÑA]]></surname>
<given-names><![CDATA[GUILLERMO A]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GEOFFREY R]]></surname>
<given-names><![CDATA[SMITH]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LEMOS-ESPINAL]]></surname>
<given-names><![CDATA[JULIO A]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MONTOYA-AYALA]]></surname>
<given-names><![CDATA[RAYMUNDO]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[ÁVILABOCANEGRA]]></surname>
<given-names><![CDATA[LUIS E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[BENAVIDES GARDUÑO]]></surname>
<given-names><![CDATA[EDUARDO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Laboratorio de Paleontología y Geobiología  ]]></institution>
<addr-line><![CDATA[México D. F ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Laboratorio de Ecología, Unidad de Biología  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Denison University Department of Biology ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>USA</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Laboratorio de Cómputo  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2012</year>
</pub-date>
<volume>17</volume>
<numero>1</numero>
<fpage>205</fpage>
<lpage>210</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-548X2012000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-548X2012000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-548X2012000100015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The distribution and abundance of organisms within a pond or lake can reflect the result of a variety of factors. We examined the abundance of the endemic fish, Poblana alchichica, in Lago de Alchichica, Puebla, Mexico, as well as how the abundance varied among months. Dissolved oxygen, temperature, and salinity varied among months. The abundance of Poblana alchichica peaked in December and February. For the months when fish were observed, their abundances were positively related to dissolved oxygen concentration and were generally not related to temperature. Our results provide evidence that there is substantial seasonal variation in the abundances of Poblana alchichica and that within months, their distributions are likely driven by dissolved oxygen than either temperature or salinity.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La distribución y abundancia de organismos dentro de un cuerpo de agua puede reflejar el resultado de variedad de factores. Examinamos la abundancia del pez endémico, Poblana alchichica, en el lago de Alchichica, Puebla, México, así como la variación de la abundancia entre los meses del estudio. El oxígeno disuelto, temperatura y salinidad variaron entre los meses. La abundancia de Poblana alchichica fue mayor en diciembre y febrero. Durante los meses en los que se observaron a los peces, su abundancia fue relacionada positivamente con la concentración de oxígeno disuelto, y por lo general no presentaron relación con la temperatura. Nuestros resultados muestran evidencia clara de variación estacional en la abundancia de Poblana alchichica, y cómo su distribución se asocia más probablemente con oxígeno disuelto que con temperatura o salinidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Abundance]]></kwd>
<kwd lng="en"><![CDATA[dissolved oxygen]]></kwd>
<kwd lng="en"><![CDATA[Poblana alchichica]]></kwd>
<kwd lng="en"><![CDATA[salinity]]></kwd>
<kwd lng="en"><![CDATA[seasonal variation]]></kwd>
<kwd lng="en"><![CDATA[temperature]]></kwd>
<kwd lng="es"><![CDATA[abundancia]]></kwd>
<kwd lng="es"><![CDATA[oxígeno disuelto]]></kwd>
<kwd lng="es"><![CDATA[Poblana alchichica]]></kwd>
<kwd lng="es"><![CDATA[salinidad]]></kwd>
<kwd lng="es"><![CDATA[variación estacional]]></kwd>
<kwd lng="es"><![CDATA[temperatura]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  ]]></body><back>
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