<?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>S0188-88972017000200145</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tolerancia a la salinidad aguda de gasterópodos dulceacuícolas nativos e introducidos en Tabasco, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Acute salinity tolerance of native and introduced freshwater gastropods of Tabasco, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albarrán Mélzer]]></surname>
<given-names><![CDATA[Natalia Celia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rangel Ruiz]]></surname>
<given-names><![CDATA[Luis José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gama Campillo]]></surname>
<given-names><![CDATA[Lilia María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arévalo de la Cruz]]></surname>
<given-names><![CDATA[Juan Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moguel-Ordoñez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco Figueroa]]></surname>
<given-names><![CDATA[Coral Jazvel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,UJAT División Académica de Ciencias Biológicas Laboratorio de Malacología]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2017</year>
</pub-date>
<volume>27</volume>
<numero>2</numero>
<fpage>145</fpage>
<lpage>151</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972017000200145&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972017000200145&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972017000200145&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  El aumento de la salinidad en los ecosistemas continentales es uno de los factores que influye en la distribución, abundancia y desarrollo de los organismos. Entender cómo varía la tolerancia al estrés ambiental entre po blaciones sirve para predecir los efectos del cambio climático en especies localmente adaptadas a su ambiente abiótico.  Objetivos:  Evaluar el efecto de la salinidad en cuatro especies de gasterópodos nativos y dos introducidos por medio de su CL50 y CL90, y TL50 y TL90 en el estado de Tabasco.  Métodos: A fin de calcular CL50, CL90 y los rangos de tolerancia aguda a la salinidad de dichas especies, se probaron concentraciones de 0 a 15 g/L. Se utilizaron tres réplicas y un testigo para cada una con 20 gasterópodos por réplica. La mortalidad se contabilizó cada hora hasta las 12 horas. Se utilizó el número de moluscos activos como un índice de tolerancia a la salinidad.  Resultados: Las especies que registraron el menor rango de tolerancia fueron Aroapyrgus clenchi &#8804; 0.30 g/L, Pyrgophorus coronatus &#8804; 1.00 g/L y las de mayor rango fueron Pomacea flagellata, Tarebia granifera y Melanoides tuberculata &#8804; 5 g/L Mexinauta impluviata &#8804; 6 g/L. Se encontró una correlación inversa y significativa entre la concentración y el tiempo letal.  Conclusiones:  La tolerancia aguda a la salinidad entre las especies introducidas Tarebia granifera y Melanoides tuberculata no mostró diferencias importantes con Mexinauta impluviata y Pomacea flagellata, pero sí con Pyrgophorus coronatus y Aroapyrgus clenchi, que presentaron una tolerancia menor.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  The increase of salinity in continental ecosystems is a factor influencing organisms&#8217; distribution, abundan ce, and development. Understanding how tolerance to environmental stress varies among populations helps to predict the effects of climate change on species locally adapted to their abiotic environment.  Goals:  Assess the effect of salinity on 4 native and 2 introduced gastropod species in Tabasco, by means of their LC50 and LC90, and LT50 and LT90.  Methods:  Salinity concentrations from 0-15 g/L were tested to determine LC50 and LC90 and tolerance ranges to acute salinity in 4 native and 2 introduced gastropods. Each concentration had 3 replicates with a control and 20 gastropods in each one. Mortality was quantified every hour up to 12 hours. The number of active mollusks was used as a salinity tolerance index.  Results: Aroapyrgus clenchi &#8804; 0.30 g/L and Pyrgophorus coronatus &#8804; 1.00 g/L were the least tolerant species, while Pomacea flagellata, Tarebia granifera, and Melanoides tuberculata &#8804; 5 g/L and Mexinauta impluviata &#8804; 6 g/L were the most tolerant. Correlation between concentration and lethal time was inverse and significant.  Conclusions:  For the introduced species Tarebia granifera and Melanoides tuberculata, acute tolerance to salinity was not significantly different than Mexinauta impluviata and Pomacea flagellata; whereas all 4 were significantly different than Pyrgophorus coronatus and Aroapyrgus clenchi that are less tolerant to salinity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Gasterópodos]]></kwd>
<kwd lng="es"><![CDATA[salinidad]]></kwd>
<kwd lng="es"><![CDATA[Tabasco]]></kwd>
<kwd lng="es"><![CDATA[tolerancia]]></kwd>
<kwd lng="en"><![CDATA[Freshwater gastropods]]></kwd>
<kwd lng="en"><![CDATA[salinity]]></kwd>
<kwd lng="en"><![CDATA[Tabasco]]></kwd>
<kwd lng="en"><![CDATA[tolerance]]></kwd>
</kwd-group>
</article-meta>
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