<?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>S0188-88972015000300417</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Abundancia espacio temporal de Flaccisagitta enflata y de la comunidad Chaetognatha en un ciclo circadiano en el Sistema Lagunar de Bahía Magdalena, Baja California Sur, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Abundance of Flaccisagitta enflata and analysis of Chaetognatha community in a circadian cycle in Bahía Magdalena lagoon system Baja California Sur, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cota-Meza]]></surname>
<given-names><![CDATA[María Soledad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Álamo]]></surname>
<given-names><![CDATA[María Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Funes-Rodríguez]]></surname>
<given-names><![CDATA[René]]></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 Laboratorio de Plancton y Ecología Marina. A.P.]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Laboratorio de Invertebrados]]></institution>
<addr-line><![CDATA[D. F. México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2015</year>
</pub-date>
<volume>25</volume>
<numero>3</numero>
<fpage>417</fpage>
<lpage>426</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972015000300417&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972015000300417&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972015000300417&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se determinó la abundancia de Flaccisagitta enflata en el Sistema Lagunar de Bahía Magdalena, Baja California Sur, México. El estudio se basó en dos tipos de muestreos; en el primero, el zooplancton fue recolectado en un plan básico de 28 estaciones, durante ocho meses en 1982; en el segundo se obtuvieron muestras en un ciclo de 24 horas realizado el 1 y 2 de agosto 1988. Las muestras se recolectaron con una red cónica estándar de 0.3 m de diámetro en la boca, 1 m de largo y malla de 0.3 mm. Los análisis revelaron que las abundancias promedio de F. enflata fueron bajas de febrero a junio y significativamente altas de julio a diciembre (p&lt;0.05). El análisis de los resultados del ciclo de 24 horas, mostró que el total de la abundancia de quetognatos y F. enflata siguen una misma tendencia con el ciclo de marea. Sin embargo, no hubo diferencias significativas entre la captura de las diferentes especies de quetognatos durante la noche y el día (p=0.05), salvo para Parasagitta euneritica, Serratosagitta bierii y Mesosagitta minima. La presencia de individuos de F. enflata de 2.0 mm (recién eclosionados) y de adultos alrededor de las estaciones cercanas a las bocas de acceso a la laguna, indica que posiblemente se deba al transporte de organismos desde la zona oceánica adyacente durante el flujo de aguas cálidas de agosto a noviembre.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The chaetognath Flaccisagitta enflata abundance was determined in the Bahía Magdalena lagoon complex, Baja California Sur, Mexico. This study is based on two sampling methods, in the first one zooplankton was collected from a basic plan of 28 stations, for eight months in 1982, and the second, during 24-hour cycle, August 1-2 during 1988. The capture of organisms was made with a standard conical net of 0.3 m of mouth diameter, 1 m long, and 0.3 mm of mesh size. Analysis revealed that F. enflata average abundances were low from February to June, and significantly higher from July to December (p&lt;0.05). The results of the 24-hour cycle, showed that the total abundance of chaetognaths and F. enflata follows the same trend with the tidal cycle. However, no significant differences day/night capture (p&lt;0.05) were observed between different species of chaetognaths, except for Parasagitta euneritica, Serratosagitta bierii and Mesosagitta minima. The presence of individuals of F. enflata 2.0 mm (new born) and adults near the mouth of access to the lagoon, were possibly transported from the adjacent oceanic area during the influx of warm waters from August to November.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bahía Magdalena]]></kwd>
<kwd lng="es"><![CDATA[ciclo circadiano]]></kwd>
<kwd lng="es"><![CDATA[Flaccisagitta enflata]]></kwd>
<kwd lng="es"><![CDATA[laguna subtropical]]></kwd>
<kwd lng="es"><![CDATA[quetognatos]]></kwd>
<kwd lng="en"><![CDATA[Chaetognaths]]></kwd>
<kwd lng="en"><![CDATA[Flaccisagitta enflata]]></kwd>
<kwd lng="en"><![CDATA[Magdalena Bay]]></kwd>
<kwd lng="en"><![CDATA[nictimeral cycle]]></kwd>
<kwd lng="en"><![CDATA[subtropical lagoon]]></kwd>
</kwd-group>
</article-meta>
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