<?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>S0188-88972017000100059</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución y densidad de moluscos invasores de la familia Thiaridae en diferentes ambientes dulceacuícolas de Tabasco, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Distribution and density of invasive mollusks of the Thiaridae family in freshwater environments of Tabasco, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trinidad-Ocaña]]></surname>
<given-names><![CDATA[Cinthia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miranda-Vidal]]></surname>
<given-names><![CDATA[José F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juárez-Flores]]></surname>
<given-names><![CDATA[Juan]]></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-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de la Frontera Sur Departamento de Ciencias de la Sustentabilidad ]]></institution>
<addr-line><![CDATA[Villahermosa Centro Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2017</year>
</pub-date>
<volume>27</volume>
<numero>1</numero>
<fpage>59</fpage>
<lpage>68</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972017000100059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972017000100059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972017000100059&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Melanoides tuberculata y Tarebia granifera son especies invasoras que se caracterizan por colonizar y establecerse fácilmente en nuevas áreas, además de desplazar a las especies nativas.  Objetivos:  Determinar la distribu ción y densidad de las especies invasoras de Thiaridos en ambientes dulceacuícolas (arroyos, ríos y lagunas) de Tabasco, México.  Métodos:  Se realizó el registro de variables físico-químicas de la columna de agua y sedimento y recolecta de organismos en 40 localidades durante los años 2011 y 2012, utilizando un nucleador, draga Petite Ponar y una red de arrastre tipo D.  Resultados: Las lagunas presentaron los máximos valores de pH (8.8), oxígeno disuelto (9.6 mg/l), tem peratura (33.9 °C), conductividad (664 mS cm-1) y materia orgánica (9.6%). En los ríos se registraron los máximos valores de coliformes fecales (790,000 UFC) y coliformes totales (781,000 UFC). Un total de 4,689 individuos de M. tuberculata y 20,408 individuos de T. granifera fueron capturados, la distribución de la densidad por ambientes determinó que el 84% de M. tuberculata se registró en las lagunas, seguido de los ríos y arroyos con 10 y 6% respectivamente, mientras que T. granifera dominó en los ríos con un 50% de la densidad seguido de las lagunas con 43 y 7% en arroyos.  Conclusiones:  Se corrobora la presencia de estas especies invasoras que presentan una amplia distribución en los ambientes dulce acuícolas del estado de Tabasco, mostrando una preferencia por ambientes lagunares y ribereños. Hasta el momento se desconoce el posible impacto que estas especies ocasionan en estos ambientes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Melanoides tuberculata and Tarebia granifera invasive species are characterized by easily colonize and settle in new areas; in addition to displace native species.  Goals:  To determine the distribution and density of invasive Thiarid species in freshwater environments (streams, rivers and lakes) of Tabasco.  Methods:  Samples were taken at 40 locations during 2011 and 2012 through several macroinvertebrate methods: corer, Petite Ponar dredge and a pushnet, physicochemical variables were also recorded in water and sediment.  Results:  Physicochemical water parameters regis tered maximum values of pH (8.8), OD (9.6 mg/l), temperature (33.9 °C), Conductivity (664 mS cm-1) and organic matter (9.6%) in lakes, and fecal coliform (790,000 UFC) and total coliforms (781,000 UFC) in rivers. A total of 4,689 individuals of M. tuberculata and T. granifera 20.408 individuals were captured, density distribution of M. tuberculata results in 84% in lagoons, 10% in rivers and 6% in streams, while T. granifera was registered with 50% in rivers, 43% in lagoons and 7% in streams.  Conclusions:  Presence of these invasive species is confirmed with a wide distribution in most of the freshwater environments of Tabasco State, with preference for lagoon and river environments, the impact of these invasive species in the environment is still unknown.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Gasterópodos]]></kwd>
<kwd lng="es"><![CDATA[invasores]]></kwd>
<kwd lng="es"><![CDATA[lóticos]]></kwd>
<kwd lng="es"><![CDATA[registros]]></kwd>
<kwd lng="es"><![CDATA[sureste de México]]></kwd>
<kwd lng="en"><![CDATA[Gastropods]]></kwd>
<kwd lng="en"><![CDATA[invasive]]></kwd>
<kwd lng="en"><![CDATA[lotic]]></kwd>
<kwd lng="en"><![CDATA[register]]></kwd>
<kwd lng="en"><![CDATA[southern of Mexico]]></kwd>
</kwd-group>
</article-meta>
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