<?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>S0188-49992020000300667</article-id>
<article-id pub-id-type="doi">10.20937/rica.53565</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[TRACE METALS IN TWO WILD POPULATIONS OF THE SQUALID CALLISTA CLAM ( Megapitaria squalida) IN THE SOUTHEASTERN GULF OF CALIFORNIA, MEXICO]]></article-title>
<article-title xml:lang="es"><![CDATA[METALES TRAZA EN DOS POBLACIONES SILVESTRES DE LA ALMEJA CALLISTA ESCUÁLIDA ( Megapitaria squalida) EN EL SURESTE DEL GOLFO DE CALIFORNIA, MÉXICO]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sepúlveda]]></surname>
<given-names><![CDATA[Carlos Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Góngora-Gómez]]></surname>
<given-names><![CDATA[Andrés Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Álvarez]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-González]]></surname>
<given-names><![CDATA[Hervey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Sevilla]]></surname>
<given-names><![CDATA[Norma Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-Fonseca]]></surname>
<given-names><![CDATA[Brenda Paulina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Sepúlveda]]></surname>
<given-names><![CDATA[Juan Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Ulloa Gómez]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Departamento de Acuacultura]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Facultad de Ciencias Agrícolas y Forestales ]]></institution>
<addr-line><![CDATA[Ciudad Delicias Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigaciones y Estudios sobre el Medio Ambiente y Desarrollo ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Occidente  ]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional-Unidad Sinaloa Departamento de Medio Ambiente]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>3</numero>
<fpage>667</fpage>
<lpage>676</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000300667&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000300667&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000300667&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The squalid callista clam (Megapitaria squalida) is a popular raw seafood item for human consumption; however, as a filter feeder, this clam accumulates heavy metals from natural and anthropogenic sources. The concentrations of copper (Cu), cadmium (Cd), chromium (Cr), nickel (Ni), lead (Pb), zinc (Zn), arsenic (As), and mercury (Hg) in sediments and the soft tissues of M. squalida from two sites on the southeastern coast of the Gulf of California, Mexico, were evaluated from April 2016 to April 2017 on a monthly basis. The metal concentrations in sediments from both sites did not exceed the Mexican and international regulations. Concentrations of Cd and Pb in the clams from Altata bay (2.49 and 5.68 µg/g dw, respectively) and Agiabampo bay (2.38 and 5.54 µg/g dw, respectively) exceeded the permissible limits recommended by Mexican sanitary regulations, thus representing a threat to human health. The higher values of Cd, As, and Hg obtained for the biota sediment accumulation factor in both sampling areas indicate that squalid callista is a strong accumulator of these metals. The metal burdens in sediments and M. squalida soft tissues are influenced by chemicals from agriculture and aquaculture, as well as urban sewage disposal near both sites. This study brings useful information on metal bioaccumulation in one of the most important commercial clam species on the Pacific coast.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La almeja callista escuálida (Megapitaria squalida) es un marisco popular que se consume crudo, pero por ser filtrador, puede acumular metales pesados de fuentes naturales y antrópicas. En el presente trabajo se evaluaron, de abril de 2016 a abril de 2017, las concentraciones mensuales de cobre (Cu), cadmio (Cd), cromo (Cr), níquel (Ni), plomo (Pb), zinc (Zn), arsénico (As) y mercurio (Hg) en sedimentos y tejidos blandos de M. squalida de dos sitios de la costa sureste del Golfo de California, México. Los niveles de metales en los sedimentos de ambos sitios no excedieron las regulaciones mexicanas e internacionales. Las concentraciones de Cd y Pb en las almejas de la bahía de Altata (2.49 y 5.68 µg/g ps, respectivamente) y la bahía de Agiabampo (2.38 y 5.54 µg/g ps, respectivamente) sí excedieron los límites permisibles recomendados por las regulaciones sanitarias mexicanas, lo que representa una amenaza para la salud humana. El factor de acumulación de sedimentos en la biota para las dos áreas muestreadas indica que la almeja callista escuálida es un acumulador fuerte de Cd, As y Hg. Las concentraciones metálicas en los sedimentos y los tejidos blandos de M. squalida están influenciadas por los productos químicos utilizados en la agricultura y la acuicultura, así como por el suministro de aguas residuales urbanas cercanas a ambos sitios. Este estudio brinda información útil sobre la bioacumulación de metales en una de las especies de almejas comerciales más importantes de la costa del Pacífico.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[toxicology]]></kwd>
<kwd lng="en"><![CDATA[chocolata clam]]></kwd>
<kwd lng="en"><![CDATA[metals bioaccumulation]]></kwd>
<kwd lng="en"><![CDATA[sediments]]></kwd>
<kwd lng="en"><![CDATA[Sinaloa]]></kwd>
<kwd lng="es"><![CDATA[toxicología]]></kwd>
<kwd lng="es"><![CDATA[almeja chocolata]]></kwd>
<kwd lng="es"><![CDATA[bioacumulación de metales]]></kwd>
<kwd lng="es"><![CDATA[sedimentos]]></kwd>
<kwd lng="es"><![CDATA[Sinaloa]]></kwd>
</kwd-group>
</article-meta>
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