<?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>S0188-88972020000100029</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2020v30n1/reyes</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Gonadal histology of Erichsonella attenuata (Isopoda: Valvifera: Idoteidae)]]></article-title>
<article-title xml:lang="es"><![CDATA[Histología gonadal de Erichsonella attenuata (Isopoda: Valvifera: Idoteidae)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Aldana]]></surname>
<given-names><![CDATA[Hugo Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Hernández]]></surname>
<given-names><![CDATA[Adriana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bortolini-Rosales]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ludwig-Maximilians-Universität München Faculty of Biology ]]></institution>
<addr-line><![CDATA[Martinsreid ]]></addr-line>
<country>Germany</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Ludwig-Maximilians-Universität München Rachel Carson Center ]]></institution>
<addr-line><![CDATA[ Munich]]></addr-line>
<country>Germany</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Faculty of Sciences Cellular Biology Department]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Faculty of Sciences Comparative Biology Department]]></institution>
<addr-line><![CDATA[CDMX ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>30</volume>
<numero>1</numero>
<fpage>29</fpage>
<lpage>36</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972020000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972020000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972020000100029&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background:  Isopods are highly diverse organisms, however, despite of their abundance and importance in ecological dynamics have been neglected in many of the aspects of their biology.  Objectives:  This paper analyses E. attenuata male and female histological characteristics, especially the reproductive structures, to increase the information of the reproductive biology and help to understand the sexual characteristics of other free-living isopods to favour comparative studies with other groups and environmental conditions.  Methods:  Organisms sampled between July 2010 and August 2011 were fixed and processed for histological preparations; Haematoxylin-Eosin and Lendrum staining techniques were applied to differentiate structures. Microphotographies were taken and analysed.  Results:  The internal organography was found to be similar on both sexes. The ovaries are modified during the maturation of the oocytes, after spawning, embryos are born in the marsupium. In some cases, a cohort in initial stages of maturation is observed in the dorsal region of the body in addition of the ones seen in the marsupium. A couple of testicles, comprising three cysts and in which different cell stages of spermatogenesis can be found, are observed in males.  Conclusions:  Since maturation of gametes occurs during the whole year, it is concluded that E. attenuata has a continuous reproductive cycle. We describe for the first time the reproductive characteristics of this isopod, which is important as reproductive aspects of these crustaceans have been neglected, thus, it is necessary to update and extend the morphological and histological information.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes:  Los isópodos son organismos altamente diversos, sin embargo, a pesar de su diversidad e importancia en la dinámica ecológica, han sido desantendidos en muchos aspectos de su biología.  Objetivos:  Se analizan las características histológicas de machos y hembras de E. attenuata, especialmente las estructuras reproductivas para incrementar la información de la biología reproductiva y ayudar a entender las características sexuales de otros isópodos de vida libre para favorecer estudios comparativos con otros grupos y condiciones ambientales.  Métodos:  Organismos muestreados entre julio del 2010 y agosto del 2011 fueron fijados y procesados para preparaciones histológicas; se utilizaron técnicas de Hematoxilina-Eosina y Lendrum para diferenciar estructuras. Se tomaron y analizaron microfotografías.  Resultados:  La organografía interna es similar en ambos sexos. Los ovarios se modifican durante la maduración de los oocitos, después de la puesta, los embriones nacen en el marsupio. En algunos casos, una cohorte en estados iniciales de maduración se observa en la región dorsal del cuerpo, además de los que se presentan en el marsupio. Los machos presentan un par de testículos, con tres cistos, en los cuales se encuentran diferentes estadios de la espermatogénesis.  Conclusiones:  Como la maduración de los gametos ocurre durante todo el año, se concluye que E. attenuata presenta una reproducción continua. Se describe por primera vez las características reproductivas de este isópodo, lo que es importante porque los aspectos reproductivos de estos crustáceos han sido descuidados, por ello, es necesario actualizar y extender la información histológica y citológica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Isopod]]></kwd>
<kwd lng="en"><![CDATA[ovaries]]></kwd>
<kwd lng="en"><![CDATA[reproduction]]></kwd>
<kwd lng="en"><![CDATA[testicles]]></kwd>
<kwd lng="es"><![CDATA[isópodo]]></kwd>
<kwd lng="es"><![CDATA[ovarios]]></kwd>
<kwd lng="es"><![CDATA[reproducción]]></kwd>
<kwd lng="es"><![CDATA[testículos]]></kwd>
</kwd-group>
</article-meta>
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