<?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>2007-3364</journal-id>
<journal-title><![CDATA[Therya]]></journal-title>
<abbrev-journal-title><![CDATA[Therya]]></abbrev-journal-title>
<issn>2007-3364</issn>
<publisher>
<publisher-name><![CDATA[Asociación Mexicana de Mastozoología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33642016000100193</article-id>
<article-id pub-id-type="doi">10.12933/therya-16-328</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nuevo registro de infanticidio en Alouatta pigra: oportunidad de traición del altruismo]]></article-title>
<article-title xml:lang="en"><![CDATA[New record of infanticide in Alouatta pigra: chance of betrayal of altruism]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Feria]]></surname>
<given-names><![CDATA[Luis M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz Pérez]]></surname>
<given-names><![CDATA[Brenda Alondra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Girón]]></surname>
<given-names><![CDATA[Xitlali]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ecología, A. C. Red de Biología y Conservación de Vertebrados ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Escuela de Biología ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>1</numero>
<fpage>193</fpage>
<lpage>196</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33642016000100193&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33642016000100193&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33642016000100193&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El infanticidio es un comportamiento normal en diferentes especies animales. En primates del género Alouatta se ha observado en grupos polígamos donde la muerte de los infantes es provocada por machos no emparentados, cuando una hembra preñada se une a un grupo familiar, o cuando un macho joven nuevo toma la propiedad de harén de otro. Un comportamiento altruista puede ser desarrollado por los machos subordinados, los cuales ayudan al macho dominante emparentado en la defensa del grupo, pero este altruismo puede ser traicionado. En un fragmento de &#8776; 6.58 ha localizado en un paisaje altamente fragmentado en el Municipio de Balancán (Tabasco), realizamos observaciones a un grupo de siete monos aulladores y un macho adulto solitario. Documentamos el cuarto caso de infanticidio Alouatta pigra en México, realizado por un macho subordinado. Los grupos de A. pigra con número mayor de hembras probablemente atraen machos externos que intentan tomar el control del grupo. Sin embargo, sugerimos que el macho subordinado aprovechó la distracción del grupo para realizar el infanticidio. Aunque el altruismo en A. pigra está presente, esta coalición puede ser traicionada por comportamientos egoístas, principalmente cuando los machos subordinados se presumen con mayor ventaja hacia los machos dominantes, o se presente la oportunidad para tomar el control del grupo y sus funciones dentro de él.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The infanticide is a normal behavior in different animal species. In primates of the genus Alouatta infanticide it has been observed in polygamous groups where death of infants is caused by unrelated males when a pregnant female joins a family group, or when a new young male takes ownership harem other. An altruist behavior is developed by subordinate males, which they may help to the related dominant male in the defense of the group, but these altruism can be betrayed. In &#8776; 6.58 ha fragment located in a highly fragmented landscape at municipality of Balancán (Tabasco), we made observations to a group of seven howler monkeys, and a lone adult male. We documented the fourth case of infanticide in Alouatta pigra in Mexico by a subordinate male. A. pigra groups with the highest number of females probably attract external male that trying to take control of the group. However, we suggest that the subordinate male could have taken advantage of the distraction of the group to made infanticide. Although the aultruist behavior in A. pigra is present, these coalition can be betrayed by selfish motivations, especially when subordinate males they presume better advantage to the dominant males, or the opportunity to take control of the group and their roles within it.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[selfish motivations]]></kwd>
<kwd lng="en"><![CDATA[dominant males]]></kwd>
<kwd lng="en"><![CDATA[subordinate males]]></kwd>
<kwd lng="en"><![CDATA[polygyny]]></kwd>
<kwd lng="en"><![CDATA[neotropical primates]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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