<?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>0370-3908</journal-id>
<journal-title><![CDATA[Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. acad. colomb. cienc. exact. fis. nat.]]></abbrev-journal-title>
<issn>0370-3908</issn>
<publisher>
<publisher-name><![CDATA[Academia Colombiana de Ciencias Exactas, Físicas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0370-39082022000100137</article-id>
<article-id pub-id-type="doi">10.18257/raccefyn.1409</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estructura y composición de la ictiofauna presente en el tramo bajo del río Córdoba, Sierra Nevada de Santa Marta, Caribe colombiano]]></article-title>
<article-title xml:lang="en"><![CDATA[Structure and composition of the ichthyofauna present in the lower section of the Córdoba River, Sierra Nevada de Santa Marta, in the Colombian Caribbean]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco-Cervantes]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco-Cervantes]]></surname>
<given-names><![CDATA[German]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Magdalena  ]]></institution>
<addr-line><![CDATA[Santa Marta ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Magdalena  ]]></institution>
<addr-line><![CDATA[Santa Marta ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2022</year>
</pub-date>
<volume>46</volume>
<numero>178</numero>
<fpage>137</fpage>
<lpage>153</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0370-39082022000100137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0370-39082022000100137&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0370-39082022000100137&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este estudio se analizaron la estructura y composición de la ictiofauna presente en el tramo bajo del río Córdoba de la Sierra Nevada de Santa Marta (SNSM) en el Caribe colombiano. Con el fin de conocer la composición y establecer posibles patrones en la estructura, la relación entre los peces y el tipo de sustrato y los parámetros fisicoquímicos durante las dos épocas climáticas, se emplearon números de Hill, modelos de distribución de especies, análisis de componentes principales (ACP), y análisis de correspondencia canónica (ACC). Se recolectaron ejemplares pertenecientes a 11 órdenes, 14 familias, 20 géneros y 27 especies dulceacuícolas, estuarinas y marinas. Los órdenes más abundantes fueron los de perciformes, gobiiformes y characiformes, y Cichlidae y Characidae, las familias más representativas. Se reportan las especies Ctenolucius hujeta, Geophagus steindachneri, Hypostomus hondae, Sturisomatichthys panamense, Apteronotus rostratus y Kronoheros umbrifer, que en Colombia se distribuyen en los ríos Magdalena y Cauca. En cuanto a la composición y riqueza de especies en los ríos de la SNSM, se informa un 28,42 % de especies descritas en un solo río, duplicando así los reportes anteriores.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We analyzed here the structure and composition of the ichthyofauna present in the lower reaches of the Córdoba River in the Sierra Nevada de Santa Marta (SNSM), Colombian Caribbean. To determine the composition and the possible structure patterns, we analyzed the relationship between the fish, the substrate, and the physicochemical parameters during the two climatic seasons using Hill numbers, species distribution models, principal component analysis (PCA), and canonical correspondence analysis (CCA). We collected samples of individuals from 11 orders, 14 families, 20 genera, and 27 freshwater, estuarine, and marine species. The most abundant orders were the Perciformes, Gobiiformes, and Characiformes while Cichlidae and Characidae were the most representative families. We report the presence of Ctenolucius hujeta, Geophagus steindachneri, Hypostomus hondae, Sturisomatichthys panamense, Apteronotus rostratus, and Kronoheros umbrifer that are distributed in Colombia in the Magdalena and Cauca Rivers. As for the composition and richness of species in the SNSM rivers, we report about 28 (42%) of the species described for an only river thus doubling previous reports.]]></p></abstract>
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<kwd lng="es"><![CDATA[Hábitat]]></kwd>
<kwd lng="en"><![CDATA[Abundance distribution]]></kwd>
<kwd lng="en"><![CDATA[Diversity]]></kwd>
<kwd lng="en"><![CDATA[Fish assembly]]></kwd>
<kwd lng="en"><![CDATA[Habitat]]></kwd>
<kwd lng="en"><![CDATA[Trophic relationship]]></kwd>
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</article-meta>
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