<?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>S0120-548X2022000100028</article-id>
<article-id pub-id-type="doi">10.15446/abc.v27n1.83092</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[CONCENTRACIONES DE METILMERCURIO EN Prochilodus magdalenae (TELEOSTEI: CURIMATIDAE) Y Hoplias malabaricus (TELEOSTEI: ERYTHRINIDAE) EN LA CUENCA BAJA DEL RÍO CAUCA-MAGDALENA, NORTE DE COLOMBIA]]></article-title>
<article-title xml:lang="en"><![CDATA[Methylmercury concentrations in Prochilodus magdalenae (Teleostei: Curimatidae) and Hoplias malabaricus (Teleostei: Erythrinidae) in the lower Cauca-Magdalena river system, northern Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[CRUZ-ESQUIVEL]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MARRUGO-NEGRETE]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Córdoba  ]]></institution>
<addr-line><![CDATA[Montería ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>27</volume>
<numero>1</numero>
<fpage>28</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-548X2022000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-548X2022000100028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-548X2022000100028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las emisiones de mercurio (Hg) a partir de actividades de minería afectan los recursos pesqueros, los cuales son importantes en la alimentación proteínica de las poblaciones humanas. El objetivo de este estudio fue analizar las concentraciones de MeHg (metilmercurio) en Prochilodus magdalenae (Bocachico) y Hoplias malabaricus (Moncholo) en hábitats continentales de la región de La Mojana y en la parte baja del río Cauca (Norte de Colombia), sitios que han sido afectados por actividades de minería aurífera. Un total de 160 ejemplares fueron colectados para su respectivo análisis, 130 en el grupo expuesto: Mojana 1 (n=36), Mojana 2 (n=56) y El Bajo Cauca (n=38), y n=30 en el grupo control. Se realizaron las determinaciones de MeHg mediante análisis directo con un Analizador Directo de Mercurio DMA 80, cromatografía líquida y espectrometría de absorción atómica. Las concentraciones de MeHg encontradas en muestras de tejido del músculo dorsal de los peces procedentes de los lugares expuestos, fueron significativamente mayores comparados con el grupo control (p &lt; 0.05), siendo la región del Bajo Cauca la más afectada por altas concentraciones de MeHg. Los resultados indican que la presencia de MeHg en los peces es consecuencia de las actividades de minería aurífera ampliamente desarrolladas en la zona. Estas concentraciones MeHg representan un riesgo mortal para la salud humana y animal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Mercury (Hg) pollution from mining activities influence fishing resources, which are important for human populations' nutrition. The aim of this research was to explore MeHg (methylmercury) concentrations in Prochilodus magdalenae (bocachico) and Hoplias malabaricus (moncholo) in freshwater habitats of the Mojana region and in the Bajo Cauca river (Northern Colombia), which have been affected by gold mining activities. A total of 160 individuals were collected, 130 in the exposed group: Mojana 1 (36), Mojana 2 (56) and El Bajo Cauca (38); and 30 individuals in the control group (Cereté). After fish sampling, MeHg determinations were done by direct analysis with a Direct Mercury Analyser DMA 80, liquid chromatography, and atomic absorption spectrometry. The results show that MeHg found in the dorsal muscle tissue is significantly higher than in the control group (p &lt; 0.05), the Bajo Cauca region being the most affected due to the high concentrations of MeHg. The results show that the presence of MeHg in fish may be related to gold mining activities, which are widely developed in the area. The toxic concentrations found represent a risk to human health.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Contaminación]]></kwd>
<kwd lng="es"><![CDATA[minería]]></kwd>
<kwd lng="es"><![CDATA[peces]]></kwd>
<kwd lng="es"><![CDATA[ríos]]></kwd>
<kwd lng="es"><![CDATA[salud]]></kwd>
<kwd lng="en"><![CDATA[Fishes]]></kwd>
<kwd lng="en"><![CDATA[health]]></kwd>
<kwd lng="en"><![CDATA[mining]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[rivers]]></kwd>
</kwd-group>
</article-meta>
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<person-group person-group-type="author">
<name>
<surname><![CDATA[Yan]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Q.]]></given-names>
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<name>
<surname><![CDATA[Yuan]]></surname>
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<given-names><![CDATA[M]]></given-names>
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<article-title xml:lang=""><![CDATA[Research Progress of Mercury Bioaccumulation in the Aquatic Food Chain, China: A Review]]></article-title>
<source><![CDATA[Bulletin of Environmental Contamination and Toxicology]]></source>
<year>2019</year>
<volume>102</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>612-20</page-range></nlm-citation>
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</article>
