<?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>S0188-88972018000300325</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2018v28n3/ceballos</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ciclo reproductivo de la almeja roñosa Chione undatella en las costas de la región minera de Santa Rosalía, Baja California Sur, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Reproductive cycle of venus clam Chione undatella in the coasts of the Santa Rosalía mining region, Baja California Sur, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arce-Peinado]]></surname>
<given-names><![CDATA[Ce Acatl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arellano-Martínez]]></surname>
<given-names><![CDATA[Marcial]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ceballos-Vázquez]]></surname>
<given-names><![CDATA[Bertha Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Ciencias Marinas ]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>28</volume>
<numero>3</numero>
<fpage>325</fpage>
<lpage>334</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972018000300325&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972018000300325&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972018000300325&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Los organismos responden a cambios en el medio ambiente, por ello el proceso reproductivo de un organismo puede verse afectado como consecuencia de la contaminación. Chione undatella es un recurso potencial pesquero y de cultivo que se ha explotado durante muchos años de forma intensiva en la costa del Pacífico mexicano.  Objetivos: El principal objetivo del estudio fue caracterizar el ciclo reproductivo y la temporalidad del desove, así como la talla de primera madurez y determinar si existen daños tisulares que puedan tener efectos adversos en la reproducción de C. undatella provocados por la contaminación presente en el puerto minero de Santa Rosalía, Golfo de California.  Métodos: A través del análisis histológico, del índice de condición (ICG) y de parámetros ambientales, se evaluaron aspectos de salud y de la biología reproductiva de la almeja roñosa en la zona costera del puerto de Santa Rosalía.  Resultados: C. undatella presenta actividad reproductiva durante todo el año, sin que ello se asocie con la concentración de clorofila-a ni con la temperatura. Se encontró una correlación inversa entre el ICG y la fase de desarrollo de mayor frecuencia (madurez) en hembras. La talla de primera madurez es de 57 mm LC. En el tejido gonadal (&gt; 80% de los individuos) se observó una infiltración de células eosinófilas en todas las fases de desarrollo gonádico, con una intensidad que osciló de intermedia a abundante (&gt; 60% de los organismos).  Conclusiones: A pesar de que C. undatella presenta actividad reproductiva todo el año, la gran prevalencia de infiltraciones hemocíticas en el tejido gonadal sugiere una potencial deficiencia en su reproducción. Es importante hacer más estudios para confirmarlo y para determinar su relación con la contaminación presente en la zona.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The organisms respond to changes in the environment, hence the reproductive process of an organism can be affected as a result of contamination. Chione undatella is a potential resource for fishing and cultivation, which has been intensively exploited for many years on the Mexican Pacific coast.  Goals: The main objective of this study was to characterize the reproductive cycle and spawning temporality, estimate the size at first maturity, and determine if there is tissue damage that may have adverse effects on reproduction of C. undatella because of the contamination found in the mining port of Santa Rosalía, Gulf of California.  Methods: Through histological analysis, the general condition index (GCI), and environmental parameters, we evaluated aspects of the reproductive biology and health of the frilled venus clam from the coastal area of the port of Santa Rosalía.  Results: C. undatella has reproductive activity throughout the year, unrelated to the concentration of chlorophyll-a, or to temperature. An inverse correlation was found between the GCI and the phase of development with higher frequency in females. The size at first maturity is 57 mm LC. In the gonadal tissue (&gt; 80% of the individuals) an infiltration of eosinophilic cells was observed in all phases of gonadal development with an intermediate to abundant intensity (&gt; 60% of the organisms).  Conclusions: Although C. undatella has reproductive activity throughout the year, the high prevalence of hemocytic in&#64257;ltration in the gonadal tissue suggests a potential deficiency in its reproduction. We recommend more studies be undertaken to confirm this preliminary finding and determine the relationship of the deficiency with the contamination present in the area.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biología reproductiva]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[índice de condición]]></kwd>
<kwd lng="es"><![CDATA[infiltración]]></kwd>
<kwd lng="es"><![CDATA[talla de primera madurez]]></kwd>
<kwd lng="en"><![CDATA[condition index]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[infiltration]]></kwd>
<kwd lng="en"><![CDATA[reproductive biology]]></kwd>
<kwd lng="en"><![CDATA[size at first maturity]]></kwd>
</kwd-group>
</article-meta>
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