<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282016000300415</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Changes in mortality rates during the larval stage of the Pacific white shrimp ( Litopenaeus vannamei ) on the basis of algal ( Chaetoceros calcitrans or Tetraselmis suecica ) food density]]></article-title>
<article-title xml:lang="es"><![CDATA[Cambios en las tasas de mortalidad durante el estadio larval del camarón blanco del Pacífico ( Litopenaeus vannamei ) en base a la densidad de alimento algal ( Chaetoceros calcitrans o Tetraselmis suecica )]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Morales]]></surname>
<given-names><![CDATA[Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Band-Schmidt]]></surname>
<given-names><![CDATA[Christine J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Díaz]]></surname>
<given-names><![CDATA[Sergio F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Colima Centro Universitario de Investigaciones Oceanológicas ]]></institution>
<addr-line><![CDATA[Manzanillo Colima]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Ciencias Marinas Departamento de Plancton y Ecología Marina]]></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>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>3</volume>
<numero>9</numero>
<fpage>415</fpage>
<lpage>420</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282016000300415&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282016000300415&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282016000300415&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In the shrimp culture, larval stages have high mortality rates, particularly in the zoea stage, this because to the star of phytoplankton feeding and an inadequate microalga species and cell density used in commercial hatcheries. Several microalgae species are used as food in shrimp larviculture, and the most common are Chaetoceros calcitrans and Tetraselmis suecica. Therefore, in this study, we quantified changes in the mortality rates of zoea larvae of L. vannamei fed either C. calcitrans or T. suecica at different cell densities. Results showed higher mortality rates when fed L. vannamei larvae with T. suecica than C. calcitrans. This study demonstrates that when zoea begin to feed on phytoplankton, they are highly sensitive to the microalga diet and cell densities supplied, which significantly affect the survival of L. vannamei larvae.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En el cultivo de camarón, los estadios larvales presentan altas mortalidades, particularmente en el estadio de zoea, debido al inicio de la alimentación fitoplanctófaga y principalmente por una inadecuada selección de la especie de microalga y de densidad celular suministrada como alimento en laboratorios de producción larvaria. Diversas microalgas son usadas como alimento en la larvicultura del camarón; las más comunes son Chaetoceros calcitrans y Tetraselmis suecica. En el presente trabajo se cuantificaron los cambios en las tasas de mortalidad de larvas en estadio de zoea de L. vannamei alimentadas con C. calcitrans o T. suecica a diferentes densidades celulares. Los resultados mostraron mayores mortalidades en larvas de L. vannamei cuando se alimentaron con T. suecica en comparación con C. calcitrans. Este estudio demostró que cuando las larvas en zoea comienzan a alimentarse de fitoplancton, son altamente sensibles al tipo de microalga y a la densidad celular suministrada, lo cual afecta significativamente la sobrevivencia de larvas de L. vannamei.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Aquaculture]]></kwd>
<kwd lng="en"><![CDATA[microalgae]]></kwd>
<kwd lng="en"><![CDATA[shrimp larvae]]></kwd>
<kwd lng="en"><![CDATA[zoea stage]]></kwd>
<kwd lng="en"><![CDATA[zooplankton]]></kwd>
<kwd lng="es"><![CDATA[Acuacultura]]></kwd>
<kwd lng="es"><![CDATA[estadio de zoea]]></kwd>
<kwd lng="es"><![CDATA[larvas de camarón]]></kwd>
<kwd lng="es"><![CDATA[microalgas]]></kwd>
<kwd lng="es"><![CDATA[zooplancton]]></kwd>
</kwd-group>
</article-meta>
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