<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442024000100057</article-id>
<article-id pub-id-type="doi">10.15517/rev.biol.trop..v72i1.59832</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Distribution of Ambystoma altamirani (Caudata: Ambystomatidae) in relation to biotic and abiotic factors in its habitat]]></article-title>
<article-title xml:lang="es"><![CDATA[Distribución de Ambystoma altamirani (Caudata: Ambystomatidae) en relación con factores bióticos y abióticos en su hábitat]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Gómez]]></surname>
<given-names><![CDATA[Ana-Citlali]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chaparro-Herrera]]></surname>
<given-names><![CDATA[Diego-J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Posgrado en Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[ CDMX]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México División de Investigación y Posgrado ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>72</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442024000100057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442024000100057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442024000100057&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  The mountain stream axolotl (Ambystoma altamirani) is an endemic amphibian of Mexico cataloged as a priority species for conservation with a very restricted distribution in the Sierra de las Cruces. Anthropogenic activities currently endanger it.  Objective:  To determine the habitat factors most associated with its presence to propose conservation strategies.  Methods:  Four sites in Villa del Carbon, State of Mexico, were sampled monthly for one year (September 2022 to August 2023) with the presence and absence of A. altamirani. Environmental, physicochemical, bacteriological, physicochemical, and biotic parameters of the water were randomly analyzed.  Results:  A total of 1 186 organisms were censused, and it was determined with a CCA that the variables most related to the populations were solar radiation, total coliforms, percentage of oxygen saturation, UV radiation, fecal coliforms, and temperature. It was observed that the habitat is not being adequately conserved. The populations studied showed a decline during the study. The sites with the highest population abundance showed an increase in the presence of adults, mainly females. It is essential to focus conservation actions on this umbrella species and maintain the variables mentioned above with little disturbance to allow the prevalence of the species.  Conclusion:  This information can be useful in developing conservation actions for the habitat, which it shares with other endemic and endangered amphibians. 1) It is urgent to protect this species due to the fragility of its populations and rapid decline; 2) It is necessary to propose conservation strategies that are adapted to the localities studied and 3) This will help to prioritize the protection of microendemic species in local environments.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  El ajolote arroyero de montaña (Ambystoma altamirani) un anfibio endémico de México es catalogado como una especie prioritaria para la conservación y tiene una distribución muy restringida en la Sierra de las Cruces. Actividades antropogénicas actualmente suponen un riesgo para la especie.  Objetivo:  Determinar los factores de su hábitat más asociados a su presencia para plantear estrategias de conservación.  Métodos:  Se muestrearon mensualmente por un año (septiembre 2022 a agosto 2023) cuatro sitios con presencia y ausencia de la especie A. altamirani, en Villa del Carbón, Estado de México. Se analizaron aleatoriamente parámetros ambientales, fisicoquímicos, bacteriológicos y bióticos del agua.  Resultados:  Se censó un total de 1 186 organismos y se determinó mediante un ACC que las variables que más se relacionaron con las poblaciones fueron: radiación solar, coliformes totales, porcentaje de saturación de oxígeno, radiación UV, coliformes fecales y temperatura. Se observo que el hábitat de los organismos no se está conservando adecuadamente y las poblaciones estudiadas mostraron declive durante el estudio. Los sitios con mayor abundancia poblacional mostraron un incremento en la presencia de adultos, principalmente de hembras. Es fundamental enfocar las acciones de conservación en esta especie sombrilla, y mantener las variables antes mencionadas con poca perturbación, para permitir la prevalencia de la especie.  Conclusión:  Esta información puede resultar útil para desarrollar acciones de conservación del hábitat, que además comparte con otros anfibios endémicos y en peligro. 1) Urge proteger esta especie debido a la fragilidad de sus poblaciones y rápido decrecimiento 2) Se necesita proponer estrategias de conservación que se adecuen a las localidades estudiadas; y 3) Esto ayudará a priorizar la protección de especies micro endémicas en ambientes locales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ambystoma altamirani]]></kwd>
<kwd lng="en"><![CDATA[endemic amphibian]]></kwd>
<kwd lng="en"><![CDATA[water quality]]></kwd>
<kwd lng="en"><![CDATA[wildlife conservation]]></kwd>
<kwd lng="en"><![CDATA[extinction risk.]]></kwd>
<kwd lng="es"><![CDATA[Ambystoma altamirani]]></kwd>
<kwd lng="es"><![CDATA[anfibio endémico]]></kwd>
<kwd lng="es"><![CDATA[calidad del agua]]></kwd>
<kwd lng="es"><![CDATA[conservación de vida silvestre]]></kwd>
<kwd lng="es"><![CDATA[riesgo de extinción.]]></kwd>
</kwd-group>
</article-meta>
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