<?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>0122-9761</journal-id>
<journal-title><![CDATA[Boletín de Investigaciones Marinas y Costeras - INVEMAR]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Invest. Mar. Cost.]]></abbrev-journal-title>
<issn>0122-9761</issn>
<publisher>
<publisher-name><![CDATA[INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS "JOSE BENITO VIVES DE ANDRÉIS" (INVEMAR)    INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS -JOSE BENITO VIVES DE ANDRÉIS- (INVEMAR)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-97612019000200095</article-id>
<article-id pub-id-type="doi">10.25268/bimc.invemar.2019.48.2.768</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Caracterización de las asociaciones de cocolitóforos en las cuencas offshore del Pacífico colombiano]]></article-title>
<article-title xml:lang="en"><![CDATA[Characterization of coccolithophore assemblages in the offshore basins of the Colombian Pacific]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio Gómez]]></surname>
<given-names><![CDATA[Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vallejo Hincapié]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rincón Martínez]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pardo Trujillo]]></surname>
<given-names><![CDATA[Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Restrepo Acevedo]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejos Tamayo]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Investigaciones en Estratigrafía  ]]></institution>
<addr-line><![CDATA[Manizales ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Caldas Departamento de Ciencias Geológicas ]]></institution>
<addr-line><![CDATA[Manizales ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro de Innovación y Tecnología Instituto Colombiano del Petróleo  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>48</volume>
<numero>2</numero>
<fpage>95</fpage>
<lpage>117</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-97612019000200095&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-97612019000200095&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-97612019000200095&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El presente estudio fue llevado a cabo en los cocolitóforos extraídos de 39 piston core perforados en el offshore de las cuencas Chocó y Tumaco, en el Pacífico colombiano. Los análisis cualitativos y cuantitativos mostraron cambios en las abundancias relativas y en el grado de preservación de los 20 taxones identificados. Los sedimentos examinados en ambas cuencas revelaron tener una asociación de cocolitos &gt;2% constituida por Gephyrocapsa oceanica, Gephyrocapsa muellerae, Gephyrocapsa &lt;3 &#956;m, Emiliania huxleyi, Calcidiscus leptoporus y Helicosphaera carteri. Con una abundancia más baja (&lt;2%), se observaron Ceratolithus spp, Coccolithus pelagicus, Florisphaera profunda, Helicosphaera princei, Helicosphaera sellii, Helicosphaera wallichii y Pontosphaera spp., junto con formas retrabajadas de Reticulofenestra spp., Sphenolithus spp. y Discoaster spp. La identificación de E. huxleyi dentro de la asociación indica que la edad de estos sedimentos no debe ser más antigua que la biozona NN21 del Pleistoceno Medio (Ioniano), aunque formas retrabajadas de edad Mioceno-Plioceno también fueron vistas en los sedimentos. Las estimaciones del número de cocolitos por gramo (cc/g) indicaron que la abundancia promedio de la Cuenca Chocó fue 5,7x106 cc/g, la cual es menor que la Cuenca Tumaco con 1,2x107 cc/g. El análisis estadístico de redundancia (RDA) sugiere que la distancia a la línea de costa es la variable determinante que controla estas diferencias de abundancias relativas y distribución de los cocolitos en ambas cuencas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This study was conducted on coccolithophores recovered from 39 piston-core samples taken offshore Chocó and Tumaco basins, on the Colombian Pacific. Qualitative and quantitative analyses of the coccoliths showed changes in the relative abundances and the state of preservation in the two basins. The examined sediments were characterized by the coccoliths Gephyrocapsa oceanica, Gephyrocapsa muellerae, Gephyrocapsa &lt;3 &#956;m, Emiliania huxleyi, Calcidiscus leptoporus and Helicosphaera carteri, which presented abundances higher than 2 %. We also identified a minority assemblage (&lt;2%) constituted by Ceratolithus spp, Coccolithus pelagicus, Florisphaera profunda, Helicosphaera princei, Helicosphaera sellii, Helicosphaera wallichii and Pontosphaera spp. together with reworked specimens of Reticulofenestra spp, Sphenolithus spp. and Discoaster spp. The recovery of E. huxleyi as part of the assemblage indicates that the studied sediments are younger than the biozone NN21, covering an age range of Middle Pleistocene (Ionian). The number of coccoliths per gram (cc/g) was calculated, demonstrating an average of 5.7x106 cc/g and 1.2x107 cc/g for Chocó and Tumaco basins, respectively. In order to interpret the causes of this variance, we performed a multivariate redundancy analysis (RDA), showing that the distance to the coastline is the controlling factor of the fluctuations of the relative abundances and distribution of the coccoliths in both basins.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cocolitóforos]]></kwd>
<kwd lng="es"><![CDATA[Pacífico colombiano]]></kwd>
<kwd lng="es"><![CDATA[Cuenca Chocó]]></kwd>
<kwd lng="es"><![CDATA[Cuenca Tumaco]]></kwd>
<kwd lng="es"><![CDATA[Cuaternario]]></kwd>
<kwd lng="en"><![CDATA[Coccolithophores]]></kwd>
<kwd lng="en"><![CDATA[Colombian Pacific]]></kwd>
<kwd lng="en"><![CDATA[Chocó basin]]></kwd>
<kwd lng="en"><![CDATA[Tumaco basin]]></kwd>
<kwd lng="en"><![CDATA[Quaternary]]></kwd>
</kwd-group>
</article-meta>
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