<?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>S0188-88972017000100069</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[La clase Bivalvia en sitios rocosos de las Regiones Marinas Prioritarias en Guerrero, México: riqueza de especies, abundancia y distribución]]></article-title>
<article-title xml:lang="en"><![CDATA[The Bivalvia Class of rocky sites in Priority Marine Regions of Guerrero, Mexico: species richness, abundance, and distribution]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Rojas]]></surname>
<given-names><![CDATA[Victor Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Garza]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Rodríguez]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torreblanca-Ramírez]]></surname>
<given-names><![CDATA[Carmina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Ibáñez]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Guerrero Facultad de Ecología Marina ]]></institution>
<addr-line><![CDATA[Acapulco Gro]]></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>69</fpage>
<lpage>86</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972017000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972017000100069&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972017000100069&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes:  Los bivalvos son parte de la fauna que habita en las costas del estado de Guerrero, muchos tienen importancia comercial, sin embargo, hay muy pocos estudios acerca de esta clase. La Comisión Nacional para el Uso y Conservación de la Biodiversidad refirió la falta de conocimiento sobre la variedad de especies que existe en las regiones marinas prioritarias (RMPs) que se ubican en esta región.  Objetivos:  Conocer la riqueza de especies de la clase Bivalvia, analizar la composición de la comunidad con base en la representación de las familias, estimar la densidad y conocer la distribución geográfica de los ejemplares.  Métodos:  El muestreo se realizó en 21 sitios, el área de muestreo fue de 10 m2 y la unidad de muestreo fue de 1 m2.  Resultados:  Se analizaron 5962 especímenes y se identificaron 40 especies. Las familias Myitilidae y Arcidae presentaron una mayor riqueza de especies y Mytilidae e Isognomonidae, una mayor abundancia. La densidad fue de 18.63 organismos/m2. Choromytilus palliopunctatus (4.5 organismos/m2) e Isognomon janus (4.0 organismos/m2) mostraron una densidad superior. Tres especies tuvieron distribución amplia, una frecuente, ocho limitada y 32 restringida. Se reportaron cinco nuevas adiciones a la fauna de bivalvos en el Pacífico Transicional Mexicano, una para Guerrero, cinco para la RMP 30, seis para la RMP 31 y diecisiete para la RMP 33.  Conclusiones:  Con los resultados de este análisis, se logró avanzar en el conocimiento de la biodiversidad y ecología de los bivalvos en las RMP en el estado de Guerrero.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background:  Bivalves are part of the fauna that inhabit the coast of the state of Guerrero. Many species are of commer cial importance and few studies exist of this class in the state. The National Commission for the Use and Conservation of Diversity acknowledges the lack of studies regarding the diversity that exists in the Priority Marine Regions (PMRs) located in Guerrero. This study focused on the Bivalves and its  Goals:  were to document species richness by analyzing the composition of the community based on the representation of families, estimate the density, and establish the geo graphical distribution of species.  Methods:  Sampling was conducted at 21 sites, the area was 10 m2 and the unit was 1 m2.  Results: 5962 specimens were analyzed and 40 species were identified. Mytilidae and Arcidae families were the best represented in species richness and Mytilidae and Isognomonidae families were the best represented in abundance. The density was 18.63 organisms / m2 and Choromytilus palliopunctatus (4.5 organisms / m2) and Isognomon janus (4.0 organisms / m2) showed the highest densities. We determined that three species have wide distribution, one species has frequent distribution, eight species have limited distribution, and 32 species have restricted distribution. This study registered five new additions to bivalve fauna in the Mexican Pacific Transition, one for the state of Guerrero, five for PMR 30, six for PmR 31, and 17 for PMR 33.  Conclusions:  Results from this study significantly advance our understanding of biodiversity and ecology of Bivalves in the state of Guerrero.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bivalvia]]></kwd>
<kwd lng="es"><![CDATA[Guerrero]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[nuevos registros]]></kwd>
<kwd lng="es"><![CDATA[zona intermareal]]></kwd>
<kwd lng="en"><![CDATA[Bivalvia]]></kwd>
<kwd lng="en"><![CDATA[Guerrero]]></kwd>
<kwd lng="en"><![CDATA[intertidal zone]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="en"><![CDATA[new records]]></kwd>
</kwd-group>
</article-meta>
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