<?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>S0188-88972019000300129</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2020v29n3/gongora</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prevalencia de Perkinsus sp. (Apicomplexa) en la almeja chocolata Megapitaria squalida de la costa central de Sinaloa, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Prevalence of Perkinsus sp. (Apicomplexa) in the callista clam Megapitaria squalida from the central coast of Sinaloa, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Góngora-Gómez]]></surname>
<given-names><![CDATA[Andrés Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sandoval-Rivera]]></surname>
<given-names><![CDATA[Pedro Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-Fonseca]]></surname>
<given-names><![CDATA[Lizeth Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Meyer]]></surname>
<given-names><![CDATA[Melina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sainz-Hernández]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Alonso]]></surname>
<given-names><![CDATA[Laura Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escobedo-Urías]]></surname>
<given-names><![CDATA[Diana Cecilia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Sepúlveda]]></surname>
<given-names><![CDATA[Juan Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-González]]></surname>
<given-names><![CDATA[Hervey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Ulloa]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Departamento de Acuacultura]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Departamento de Biotecnología]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Departamento de Medio Ambiente]]></institution>
<addr-line><![CDATA[Guasave Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>29</volume>
<numero>3</numero>
<fpage>129</fpage>
<lpage>136</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972019000300129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972019000300129&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972019000300129&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes:  Diferentes especies del protozoario Perkinsus spp. han sido asociados con mortalidades de moluscos comerciales.  Objetivos:  Se evaluó la prevalencia de Perkinsus sp. en la almeja Megapitaria squalida (junio 2015 a noviembre de 2016) para determinar la relación de la infección con la talla.  Métodos:  Se sembraron 5,000 semillas (5.73 mm altura de la concha y 0.03 g de peso inicial) en un refugio pesquero de Altata, Sinaloa. Se recolectaron 60 ejemplares cada mes para evaluar su crecimiento y prevalencia del parásito. Se obtuvieron los parámetros fisicoquímicos del agua (temperatura, salinidad, pH, oxígeno disuelto, profundidad y transparencia) y la longitud, largo y ancho de la concha y peso final de M. squalida.  Resultados:  La prueba de medio fluido de tioglicolato de Ray (MFTR) detectó células esféricas (10X) de color obscuro, indicando la presencia de presuntas hipnosporas de Perkinsus sp. durante los primeros 17 meses de muestreo. La intensidad de la infección promedio fue de grado 2 (leve), mientras que la prevalencia máxima fue de 43.33% en los meses de noviembre (2015) y marzo (2016), con un promedio de 21.05%. Ninguna de las muestras positivas (n = 112) de Perkinsus sp. con MFTR confirmó la presencia del protozoario. No se obtuvo correlación (p &gt;0.05) entre la prevalencia del patógeno con todos los parámetros estudiados.  Conclusiones:  Los resultados sugieren que M. squalida es poco susceptible a la infección de Perkinsus sp. El presente trabajo representa el primer reporte de Perkinsus sp. en la almeja chocolata M. squalida.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background:  Different species of Perkinsus spp. have been associated to mortality of commercial mollusks.  Goals:  The prevalence of Perkinsus sp. in the callista clam Megapitaria squalida was evaluated monthly (June 2015 to November 2016) to determine the relationship between the infection and size of clam.  Methods:  5,000 clam seeds (5.73 mm height of the shell and 0.03 g of initial weight) were placed in a fishing refuge of Altata, Sinaloa. A total of 60 specimens were collected each month to evaluate their growth and parasite prevalence. The water physicochemical parameters (temperature, salinity, pH, dissolved oxygen, depth, and transparency) and the length, height, and width of the shell and final weight of M. squalida were obtained.  Results:  Ray&#8217;s thioglycollate fluid medium test (MFTR) detected spherical cells (10X) of dark color indicating the presence of presumed hypnospores of Perkinsus sp. during the first 17 months of sampling. The mean infection intensity was grade 2 (mild), while the maximum prevalence was 43.33% in the months of November (2015) and March (2016), with an average of 21.05%. None of the Perkinsus sp sample (n = 112) positively detected by MFTR confirmed the presence of the protozoan. There was no correlation (p &gt;0.05) between the prevalence of the pathogen with all the parameters studied.  Conclusions:  The results suggest that M. squalida is not susceptible to Perkinsus sp. The present represents the first report of Perkinsus sp. in the callista clam M. squalida.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[almeja chocolata]]></kwd>
<kwd lng="es"><![CDATA[Bahía de Altata]]></kwd>
<kwd lng="es"><![CDATA[estado sanitario]]></kwd>
<kwd lng="es"><![CDATA[Perkinsosis]]></kwd>
<kwd lng="es"><![CDATA[refugio pesquero]]></kwd>
<kwd lng="en"><![CDATA[Altata Bay]]></kwd>
<kwd lng="en"><![CDATA[callista clam]]></kwd>
<kwd lng="en"><![CDATA[fishing refuge]]></kwd>
<kwd lng="en"><![CDATA[Perkinsosis]]></kwd>
<kwd lng="en"><![CDATA[sanitary status]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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