<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972017000100087</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Monitoreo de una planta tratadora de aguas residuales mediante pruebas de toxicidad aguda con el cladócero Daphnia magna y el rotífero de agua dulce Lecane quadridentata]]></article-title>
<article-title xml:lang="en"><![CDATA[Monitoring of a water treatment plant using acute toxicity tests with the cladoceran Daphnia magna and the freshwater rotifer Lecane quadridentata]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero-Jiménez]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rico-Martínez]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva-Briano]]></surname>
<given-names><![CDATA[Marcelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Aguascalientes Centro de Ciencias Básicas Departamento de Química]]></institution>
<addr-line><![CDATA[Ags Aguascalientes]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Aguascalientes Centro de Ciencias Básicas Departamento de Biología]]></institution>
<addr-line><![CDATA[Ags Aguascalientes]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<volume>27</volume>
<numero>1</numero>
<fpage>87</fpage>
<lpage>92</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972017000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972017000100087&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972017000100087&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Los parámetros fisicoquímicos y pruebas de toxicidad aguda sirven para valorar las condiciones del agua de los efluentes de las plantas de tratamiento de aguas residuales de acuerdo con la normativa de la NOM-003-SEMARNAT-1997.  Objetivos: Conocer la calidad del agua del influente y efluente de la planta tratadora de aguas residuales de la Universidad Autónoma de Aguascalientes durante el ciclo anual 2007-2008, fue el objetivo principal de esta investigación.  Métodos:  Se midieron los parámetros físico-químicos, también se realizaron pruebas de toxicidad aguda con el cladócero Daphnia magna y el rotífero Lecane quadridentata, quincenalmente.  Resultados: Los valores de concentración letal media en el influente fueron de 25.71 y 3.88 unidades de toxicidad para L. quadridentata, mientras que para D. magna fueron de 31.51 y 3.17 unidades de toxicidad. El efluente mostró valores de concentración letal media de 60.71 y 1.64 unidades de toxicidad con L. quadridentata y para D. magna no se presentó toxicidad.  Conclusiones: La planta tratadora de aguas residuales de la Universidad Autónoma de Aguascalientes durante el periodo 2007-2008 cumplió con los parámetros mexicanos de calidad de salud del agua después de su tratamiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Monitoring of physicochemical parameters and acute toxicity tests allow us to measure water quality of the influent and effluent of wastewater treatment plants in accordance with the parameters established by the NOM-003-SEMARNAT-1997.  Goals:  We measured water quality of the influent and effluent of the wastewater treatment plant of the Autonomous University of Aguascalientes during 2007-2008.  Methods:  Every 15 days physicochemical parameters were taken and acute toxicity tests were conducted with the cladoceran Daphnia magna and the rotifer Lecane quadridentata.  Results:  The influent showed &#8203;&#8203;median lethal concentration to be between 25.71 and 3.88 toxic units with L. quadriden tata, while with D. magna the median lethal concentration was between 31.51 and 3.17 toxic units. The effluent showed median lethal concentration to be between 60.71 and 1.64 toxic units with L. quadridentata, whereas the D. magna showed no toxicity.  Conclusions: We concluded that the wastewater treatment plant of the Autonomous University of Aguascalientes in 2007-2008 fulfilled Mexico´s water quality criteria after treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cladóceros]]></kwd>
<kwd lng="es"><![CDATA[efluente]]></kwd>
<kwd lng="es"><![CDATA[influente]]></kwd>
<kwd lng="es"><![CDATA[pruebas de toxicidad aguda]]></kwd>
<kwd lng="es"><![CDATA[rotíferos]]></kwd>
<kwd lng="en"><![CDATA[Acute toxicity test]]></kwd>
<kwd lng="en"><![CDATA[cladoceran]]></kwd>
<kwd lng="en"><![CDATA[effluent]]></kwd>
<kwd lng="en"><![CDATA[influent]]></kwd>
<kwd lng="en"><![CDATA[rotifer]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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