<?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>1870-3453</journal-id>
<journal-title><![CDATA[Revista mexicana de biodiversidad]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Biodiv.]]></abbrev-journal-title>
<issn>1870-3453</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-34532015000100123</article-id>
<article-id pub-id-type="doi">10.7550/rmb.42918</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Ecología poblacional de Diadema mexicanum (Echinodermata: Echinoidea) en dos comunidades arrecifales de bahías de Huatulco, Oaxaca, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Population ecology of Diadema mexicanum (Echinodermata: Echinoidea) in two reef communities from Bahías de Huatulco, Oaxaca, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Montiel]]></surname>
<given-names><![CDATA[Bárbara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez-Villalobos]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Investigación Científica y de Educación Superior de Ensenada Posgrado en Ecología Marina ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Mar Instituto de Recursos ]]></institution>
<addr-line><![CDATA[San Pedro Pochutla Oaxaca]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>86</volume>
<numero>1</numero>
<fpage>123</fpage>
<lpage>130</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532015000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532015000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532015000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En 2009 ocurrió un evento de mortandad masiva de Diadema mexicanumen La Entrega, bahías de Huatulco y mortalidad parcial en comunidades arrecifales cercanas. En este trabajo se estimó durante el periodo de mayo 2009 a octubre 2011 la densidad poblacional, mortalidad natural y distribución espacial de D. mexicanumen 2 localidades afectadas, San Agustín e isla Montosa. Además, se evaluó la relación existente entre la densidad poblacional y la temperatura, pH y precipitación pluvial. La densidad media (± DE) fue de 0.64±0.42 ind.m-2 en San Agustín y de 1.29±1.24 ind.m-2 en isla Montosa. Se calculó una tasa de mortalidad de 0.219 para San Agustín y 0.605 para isla Montosa. En ambas localidades la distribución fue agregada en todos los meses excepto en 5 de ellos, que fue aleatoria. En San Agustín la precipitación se relacionó significativamente con la densidad y en isla Montosa ninguna variable mostró una relación significativa. Isla Montosa presenta una mayor disponibilidad de recursos y sustrato más adecuado para la población de D. mexicanumque San Agustín, sin embargo, su población presentó mayor inestabilidad, probablemente debido a su cercanía con La Entrega, que ocasionó que su nivel de mortandad fuera mayor.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In 2009 there was a report on an event of mass mortality of Diadema mexicanumin La Entrega, Bahías de Huatulco, and partial mortality in adjacent reef communities. In this study we estimated population density of D. mexicanum, as well as natural mortality and spatial distribution in 2 affected localities (San Agustín and Isla Montosa) during a subsequent period (May 2009-October 2011). Additionally we evaluated the relation between population density and temperature, pH and pluvial precipitation. Mean density (± SD) was 0.64±0.42 ind.m-2 in San Agustín, and 1.29±1.24 ind.m-2 in Isla Montosa. Mortality rate was 0.219 in San Agustín, and 0.605 in Isla Montosa. For both localities spatial distribution was aggregated during the whole period except in 5 months when it was random. In San Agustín pluvial precipitation was significantly related to density, whereas in Isla Montosa there were not significant relations. Isla Montosa has a larger availability of resources and a more suitable substrate for D. mexicanum population than San Agustín, however, the sea urchin population in this locality showed more instability, probably because it is closer to La Entrega and the level of the die-off was higher.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Equinodermos]]></kwd>
<kwd lng="es"><![CDATA[Erizos de mar]]></kwd>
<kwd lng="es"><![CDATA[Distribución espacial]]></kwd>
<kwd lng="es"><![CDATA[Mortandad masiva]]></kwd>
<kwd lng="es"><![CDATA[Densidad poblacional]]></kwd>
<kwd lng="en"><![CDATA[Echinoderms]]></kwd>
<kwd lng="en"><![CDATA[Sea urchins]]></kwd>
<kwd lng="en"><![CDATA[Spatial distribution]]></kwd>
<kwd lng="en"><![CDATA[Mass mortality]]></kwd>
<kwd lng="en"><![CDATA[Population density]]></kwd>
</kwd-group>
</article-meta>
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