<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972015000200285</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Composición y diversidad de peces del río San Pedro, Balancán, Tabasco, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Fish diversity and composition from San Pedro river, Balancán, Tabasco, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Domínguez]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Melgar-Valdes]]></surname>
<given-names><![CDATA[Carolina Esther]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barba Macías]]></surname>
<given-names><![CDATA[Everardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodiles-Hernández]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarrete]]></surname>
<given-names><![CDATA[Alberto de Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perera García]]></surname>
<given-names><![CDATA[Martha Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuenca Soria]]></surname>
<given-names><![CDATA[Carlos A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Gómez]]></surname>
<given-names><![CDATA[Raúl E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica Multidisciplinaria de los Ríos ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,El Colegio de la Frontera Sur Unidad Villahermosa ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,El Colegio de la Frontera Sur Unidad San Cristóbal ]]></institution>
<addr-line><![CDATA[San Cristóbal de las Casas Chiapas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,El Colegio de la Frontera Sur Unidad Chetumal ]]></institution>
<addr-line><![CDATA[Chetumal Quintana Roo]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<volume>25</volume>
<numero>2</numero>
<fpage>285</fpage>
<lpage>292</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972015000200285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972015000200285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972015000200285&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En la subcuenca del río San Pedro, Balancán, Tabasco, México, se realizó un estudio ictiofaunístico en dos subsistemas; el cauce principal del río y la zona de inundación en la parte baja, durante los meses de marzo 2007 a febrero 2008. De un total de 1,035 peces capturados, se identificaron 33 especies, 25 géneros y 14 familias. La familia Cichlidae y Poeciliidae fueron las más diversas, cuatro especies son introducidas: Pterygoplichthys pardalis, Ctenopharyngodon idella, Oreochromis niloticus, Parachromis managuensis, dos son nuevos registros Potamarius usumacintae y P. pardalis. Las especies más abundantes fueron Thorichthys affinis y T. helleri, mientras que P. usumacintae, Phallichthys fairweatheri, "Cichlasoma" Nandopsis urophthalmus, C. idella y Batrachoides goldmani, fueron las menos abundantes. La diversidad y dominancia presentaron valores altos en los sitios I (H´=2.52 bits) y el sitio II (&#955; =0.38 sp/ind), mientras que los sitios III (J´=0.86) y IV (J´=0.99) fueron más equitativos. La especie más abundante (Nmax= 353) se mostró en el sitio II. Se encontró diferencias significativas (p &lt; 0.5) entre la comparación de la diversidad y sitios. El análisis de correspondencia canónica, mostró que la temperatura, el oxígeno disuelto y la profundidad son los factores más importantes en la distribución de las especies. Finalmente, se encontró que las abundancias relativas de las especies presentes en las dos épocas estuvo representadas por dos familias; Cichlidae (T. affinis, T. helleri, Petenia splendida) y Characidae con (Astyanax aeneus).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In the San Pedro river sub-basin, Balancán, Tabasco, Mexico, an ichthyofauna study was carried out in two subsystems; the main stream and the floodplain during the months of March 2007 to February 2008. From a total of 1035 fish were collected, 33 species, 25 genera and 14 families were identified. The Cichlidae and Poeciliidae family were the most species; four species are introduced Pterygoplichthys pardalis, Ctenopharyngodon idella, Oreochromis niloticus, Parachromis managuensis and two new records were found: P. pardalis and Potamarius usumacintae. The most abundance species were Thorichthys affinis and T. helleri and five species were least abundant: P. usumacintae, Phallichthys fairweatheri, "Cichlasoma" Nandopsis urophthalmus, C. idella and Batrachoides goldmani. The higher values of diversity and abundance showed in sites I (H'=2.52 bits) and II (&#955;=0.38 sp/ind). The higher values of evenness were in sites III (J '= 0.86) and IV (J ' = 0.99). The abundance (Nmax = 353) species was showed in the site II. Significant differences (p&lt;0.05) were found between the diversity and sites comparison. Canonical correspondence analysis showed that the temperature, dissolved oxygen and depth are the most important factors in the distribution of species. Finally, the relative abundance of species in the two seasons was representative by two families; Cichlidae T. affinis, (T. helleri and Petenia splendida) and Characidae (Astyanax aeneus).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Diversidad]]></kwd>
<kwd lng="es"><![CDATA[equidad]]></kwd>
<kwd lng="es"><![CDATA[río]]></kwd>
<kwd lng="es"><![CDATA[riqueza]]></kwd>
<kwd lng="en"><![CDATA[Diversity]]></kwd>
<kwd lng="en"><![CDATA[evenness]]></kwd>
<kwd lng="en"><![CDATA[richness]]></kwd>
<kwd lng="en"><![CDATA[river]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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