<?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>0304-3584</journal-id>
<journal-title><![CDATA[Actualidades Biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[Actu Biol]]></abbrev-journal-title>
<issn>0304-3584</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0304-35842023000200001</article-id>
<article-id pub-id-type="doi">10.17533/udea.acbi/v45n119a01</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Composition and structure of the fish fauna in the lower section of the Gaira River, Sierra Nevada of Santa Marta (SNSM), in the Colombian Caribbean]]></article-title>
<article-title xml:lang="es"><![CDATA[Composición y estructura de la fauna íctica del tramo bajo del río Gaira, Sierra Nevada de Santa Marta (SNSM), Caribe colombiano]]></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[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>45</volume>
<numero>119</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0304-35842023000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0304-35842023000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0304-35842023000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT On the Pacific and Caribbean coasts of Colombia flow rivers typical of large land masses, as well as small streams from coastal mountains. In large rivers, the diversity of species is high compared to coastal streams. In contrast, mountain basins present a greater abundance of amphidromous species than primary ones. In this research, the composition of the fish fauna of the lower sector of the Gaira River on the northwestern slope of the Sierra Nevada de Santa Marta (SNSM) was analyzed. Sampling was carried out in the rainy and dry seasons with the objective of knowing the composition and determining possible correlations in the structure, and between the fish with the substrate, for which, principal component analysis (PCA) and Analysis of Canonical Correspondence (ACC) were used, among others. 967 individuals were collected, distributed in 11 orders, 13 families and 23 species, of which six (26.8%) are considered purely freshwater, 15 (65.21%) are estuarine species, and two (8.69 %) are marine. The PCA differentiated two biotopes, backwaters and rapids, and the ACC showed that pH is the most important environmental variable in the distribution of species. The change in seasonality originated variation in the flow rate that affected the abundance and affected the structure of the habitat. This alteration generated hydrological variations that were reflected in the fish communities in the dry season due to the interruption of the flow of water between the upper, middle and lower parts of the river.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En las costas Pacífica y Caribe Colombiana desembocan ríos típicos de grandes masas continentales, y a su vez, pequeños arroyos de serranías costeras. En los grandes ríos la diversidad de especies es alta comparada con los arroyos costeros. En contraste, las cuencas de serranías presentan mayor abundancia de especies anfídromas que primarias. En esta investigación se analizó la composición de la fauna íctica del sector bajo del río Gaira de la vertiente Noroccidental de la Sierra Nevada de Santa Marta (SNSM). Los muestreos se realizaron en temporada de lluvias y de sequía con el objetivo de conocer la composición y determinar posibles correlaciones en la estructura, y entre los peces con el sustrato, para lo cual, se emplearon análisis de componentes principales (ACP), y análisis de correspondencia canónica (ACC), entre otros. Se recolectaron 967 individuos, distribuidos en 11 órdenes, 13 familias y 23 especies, de las cuales seis (26,8%) son consideradas netamente de agua dulce, 15 (65,21%) son especies estuarinas, y dos (8,69%) son marinas. El ACP diferenció dos biotopos, remansos y rápidos de corriente, y el ACC mostró que el pH es la variable ambiental de mayor importancia en la distribución de las especies. El cambio de estacionalidad originó variación en el flujo de caudal que afectó la abundancia e incidió en la estructura del hábitat. Esta alteración generó variaciones hidrológicas que se reflejaron en las comunidades de peces en la época seca por la interrupción del flujo de agua entre la parta alta, media y baja del río.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[composition]]></kwd>
<kwd lng="en"><![CDATA[diversity]]></kwd>
<kwd lng="en"><![CDATA[fish associations]]></kwd>
<kwd lng="en"><![CDATA[richness]]></kwd>
<kwd lng="es"><![CDATA[asociaciones de peces]]></kwd>
<kwd lng="es"><![CDATA[composición]]></kwd>
<kwd lng="es"><![CDATA[diversidad]]></kwd>
<kwd lng="es"><![CDATA[riqueza]]></kwd>
</kwd-group>
</article-meta>
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<surname><![CDATA[Winemiller]]></surname>
<given-names><![CDATA[K. O.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Fernández]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Taphorn]]></surname>
<given-names><![CDATA[D. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Nico]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Duque]]></surname>
<given-names><![CDATA[A. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fish assemblages of the Casiquiere River, a corridor and zoogeolographical filter dispersal between the Orinoco and Amazon basins]]></article-title>
<source><![CDATA[Journal of Biology of Biogeography]]></source>
<year>2008</year>
<volume>35</volume>
<page-range>1551-63</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
