<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992022000100118</article-id>
<article-id pub-id-type="doi">10.20937/rica.54180</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Pesticide distribution and ecotoxicological risk in the Ayuquila-Armería river]]></article-title>
<article-title xml:lang="es"><![CDATA[Distribución de pesticidas y riesgo ecotoxicologico en el río Ayuquila-Armería]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Aguilar]]></surname>
<given-names><![CDATA[Brian Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Rivera]]></surname>
<given-names><![CDATA[Luis Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñiz-Valencia]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mercado-Silva]]></surname>
<given-names><![CDATA[Norman]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Íñiguez-Dávalos]]></surname>
<given-names><![CDATA[Luis Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peregrina-Lucano]]></surname>
<given-names><![CDATA[Alejandro Aarón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de la Costa Sur Departamento de Ecología y Recursos Naturales]]></institution>
<addr-line><![CDATA[Autlán de Navarro Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Colima Facultad de Ciencias Químicas ]]></institution>
<addr-line><![CDATA[ Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Bernardo O&#8217;Higgins Centro de Investigación en Recursos Naturales y Sustentabilidad ]]></institution>
<addr-line><![CDATA[Santiago ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Centro de Investigación en Biodiversidad y Conservación ]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Exactas e Ingeniería Departamento de Farmacobiología]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>38</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992022000100118&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992022000100118&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992022000100118&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Pesticides make an important contribution to increased global agricultural production; however, their intensive use represents a risk to biota in both the short and long terms. The physical and chemical characteristics of these compounds, as well as their versatility in agricultural, domestic, and public health use, have led them to become widely present in the environment. The objectives of this study were to evaluate the spatiotemporal distribution of pesticides in the surface water of the Ayuquila-Armería river and to conduct an ecotoxicological risk assessment in algae, macroinvertebrates, and fish. The presence of 11 analytes was determined, being &#955;-cyhalothrin, ametrine, and malathion the pesticides with highest concentrations, and carbendazim, malathion, and glyphosate those with the highest frequency of detection (&gt; 70 %). The number of pesticides detected per sample presented no significant temporal differences, and there was no significant effect of the crops or vegetation adjacent to the study sites on the number of pesticides detected per sample. The sampling conducted in November 2019 (wet season) presented the greatest difference in concentrations of most pesticides, compared to the other samplings. The ecotoxicological risk assessment showed that the macroinvertebrates (Daphnia magna) are the most vulnerable to the concentrations of pesticides in surface water, followed by fish and algae. Regulation of the importation, trade, and management of malathion and &#955;-cyhalothrin is crucial in order to reduce the presence of their residues and the risks associated with them.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los plaguicidas contribuyen de manera importante al aumento de la producción agrícola mundial; sin embargo, su uso intensivo representa un riesgo para la biota tanto a corto como a largo plazo. Las características físicas y químicas de estos compuestos, así como su versatilidad en el uso agrícola, doméstico y de salud pública, los han llevado a tener una amplia presencia en el ambiente. Los objetivos de este estudio fueron evaluar la distribución espaciotemporal de plaguicidas en agua superficial del río Ayuquila-Armería, y realizar una evaluación de riesgo ecotoxicológico en algas, macroinvertebrados y peces. Se determinó la presencia de 11 analitos, siendo la &#955;-cihalotrina, la ametrina y el malatión los plaguicidas con mayores concentraciones, en tanto que el carbendazim, el malatión y el glifosato fueron los de mayor frecuencia de detección (&gt; 70 %). El número de plaguicidas detectados por muestra no presentó diferencias temporales significativas, y no hubo efecto significativo de los cultivos o la vegetación adyacente a los sitios de estudio sobre el número de plaguicidas detectados por muestra. El muestreo realizado en noviembre de 2019 (temporada de lluvias) presentó la mayor diferencia en las concentraciones de la mayoría de los plaguicidas, en comparación con los demás muestreos. La evaluación de riesgos ecotoxicológicos mostró que los macroinvertebrados (Daphnia magna) son los más vulnerables a las concentraciones de plaguicidas en el agua superficial, seguidos de los peces y las algas. La regulación de la importación, el comercio y la gestión del malatión y la &#955;-cihalotrina es fundamental para reducir la presencia de sus residuos y los riesgos asociados a ellos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[water pollution]]></kwd>
<kwd lng="en"><![CDATA[agrochemical]]></kwd>
<kwd lng="en"><![CDATA[intensive farming]]></kwd>
<kwd lng="en"><![CDATA[pesticide monitoring]]></kwd>
<kwd lng="en"><![CDATA[solid-phase extraction]]></kwd>
<kwd lng="es"><![CDATA[contaminación del agua]]></kwd>
<kwd lng="es"><![CDATA[agroquímicos]]></kwd>
<kwd lng="es"><![CDATA[agricultura intensiva]]></kwd>
<kwd lng="es"><![CDATA[monitoreo de plaguicidas]]></kwd>
<kwd lng="es"><![CDATA[extracción en fase sólida]]></kwd>
</kwd-group>
</article-meta>
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