<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532016000401360</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2016.06.018</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Endohelminths of some species of fishes from Lake Xochimilco, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Endohelmintos de algunos peces del lago de Xochimilco, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-López]]></surname>
<given-names><![CDATA[María de Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salguero-Vargas]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Prieto]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio-Sarabia]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Ponce de León]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología Laboratorio de Helmintología]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Colegio de Ciencias y Humanidades, Plantel Oriente ]]></institution>
<addr-line><![CDATA[Mexico City ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>87</volume>
<numero>4</numero>
<fpage>1360</fpage>
<lpage>1364</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532016000401360&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532016000401360&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532016000401360&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The helminth fauna of 8 introduced and 1 native species (Chirostoma jordani) of freshwater fishes from Xochimilco Lake in southern México City, Mexico, is studied for the first time. Five species of fishes from the families Goodeidae, Atherinopsidae and Poeciliidae were positive to helminth infections. Their helminth fauna consists of 5 species of parasites, including 1 adult tapeworm (Schyzocotyle acheilognathi), 2 trematode metacercariae (Posthodiplostomum minimum and Tylodelphys aztecae), and 2 larval stages of nematodes (Contracaecum sp. and Eustrongylides sp.). Schyzocotyle acheilognathi is recorded for the first time in the poeciliid Pseudoxiphophorus jonesii. The metacercariae of P. minimum and T. aztecae are the species that reached the highest prevalence, mean intensity and mean abundance values among the analyzed fish. The goodeid G. atripinnis exhibited the richest helminth fauna, since this species was parasitized by 5 helminth species. We hypothesize that the low helminth species richness of the Xochimilco Lake ichthyofauna, compared to that found in other water bodies in Central Mexico, might be the result of the biotic and abiotic conditions of the lake which are influenced by the pollution levels in the area. An alternative explanation would be that 8 of the 9 species of fishes analyzed are introduced species into Xochimilco Lake, and have not been in the system long enough to allow other helminth species potentially available to become established.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El presente trabajo representa el primer estudio sobre los helmintos de 8 especies de peces introducidas y una nativa (Chirostoma jordani) en el lago de Xochimilco, localizado al sur de la Ciudad de México, México. Cinco de las 9 especies estudiadas, representantes de Goodeidae, Atherinopsidae y Poeciliidae, se encontraron infectadas por helmintos. La fauna helmintológica de estos peces está compuesta por 5 especies de parásitos: un cestodo en estado adulto (Schyzocotyle acheilognathi), 2 larvas de tremátodos (Posthodiplostomum minimum y Tylodelphys aztecae) y 2 de nemátodos (Contracaecum sp. y Eustrongylides sp.). Se registra por primera vez S. acheilognathi en el poecílido Pseudoxiphophorus jonesii. Las metacercarias de P. minimum y T. aztecae son las especies que presentaron los valores más altos de prevalencia, abundancia e intensidad promedio en los peces estudiados. Por su parte, el goodeido Goodea atripinnis exhibió la mayor riqueza dado que se encontró parasitado por las 5 especies de helmintos. Se considera que la baja riqueza de especies de helmintos en peces del lago de Xochimilco, en comparación con otros cuerpos de agua del centro de México, podría atribuirse a las condiciones abióticas y bióticas existentes en la localidad, las cuales son influidas por los niveles de contaminación en la zona. Una hipótesis alternativa al punto referido anteriormente es el hecho de que 8 de las 9 especies de peces analizadas fueron introducidas al lago de Xochimilco, por lo que su tiempo de exposición a las especies de helmintos disponibles no ha sido suficiente.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Posthodiplostomum minimum]]></kwd>
<kwd lng="en"><![CDATA[Tylodelphys aztecae]]></kwd>
<kwd lng="en"><![CDATA[Schyzocotyle acheilognathi]]></kwd>
<kwd lng="en"><![CDATA[Contracaecum sp.]]></kwd>
<kwd lng="en"><![CDATA[Eustrongylides sp.]]></kwd>
<kwd lng="en"><![CDATA[Taxonomy]]></kwd>
<kwd lng="en"><![CDATA[Freshwater fish]]></kwd>
<kwd lng="en"><![CDATA[Parasites]]></kwd>
<kwd lng="es"><![CDATA[Posthodiplostomum minimum]]></kwd>
<kwd lng="es"><![CDATA[Tylodelphys aztecae]]></kwd>
<kwd lng="es"><![CDATA[Schyzocotyle acheilognathi]]></kwd>
<kwd lng="es"><![CDATA[Contracaecum sp.]]></kwd>
<kwd lng="es"><![CDATA[Eustrongylides sp.]]></kwd>
<kwd lng="es"><![CDATA[Taxonomía]]></kwd>
<kwd lng="es"><![CDATA[Peces dulceacuícolas]]></kwd>
<kwd lng="es"><![CDATA[Parásitos]]></kwd>
</kwd-group>
</article-meta>
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