<?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>S1870-34532020000100324</article-id>
<article-id pub-id-type="doi">10.22201/ib.20078706e.2020.91.3275</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Periodo reproductivo del conejo castellano, Sylvilagus floridanus, en un campo de lava de la Ciudad de México a través del análisis de la variación estacional de la abundancia y el tamaño de sus heces]]></article-title>
<article-title xml:lang="en"><![CDATA[Reproductive period of the eastern cottontail, Sylvilagus floridanus, in a lava field in México City through the analysis of the seasonal variation of the abundance and size of its feces]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Glebskiy]]></surname>
<given-names><![CDATA[Yury]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dorantes-Villalobos]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Zenón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Ecología y Recursos Naturales]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>91</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532020000100324&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532020000100324&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532020000100324&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La reproducción requiere grandes cantidades de energía, por lo que muchos organismos buscan las temporadas idóneas para realizarla. Por ejemplo, se espera que cada población del conejo castellano, Sylvilagus floridanus, ajuste su ciclo de vida para reproducirse en la temporada del año más adecuada, la cual puede variar dependiendo de las condiciones del sitio donde cada una vive. El objetivo de este estudio fue conocer en qué momento del año se reproduce esta especie de conejo en el matorral xerófilo del Pedregal de San Ángel, Ciudad de México, con base en un análisis de variación estacional de la abundancia y tamaño de sus excretas. Se hicieron muestreos mensuales de abundancia de heces en sitios establecidos por 4 años, y durante el primer año, también se registró el tamaño de las excretas. Se analizaron los datos usando una prueba de &#967;2. Se registró que las pastillas fecales pequeñas se concentran en septiembre y que los mayores valores de abundancia se registraron entre octubre y diciembre. Los datos sugieren que el periodo reproductivo sucede en agosto, que es un mes de mayor disponibilidad de alimento. Los datos obtenidos no coinciden con la temporada reproductiva que registra esta especie en otras localidades.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Reproduction requires large amounts of energy, so many organisms look for the ideal season to carry out this process. For example, each population of the Eastern Cottontail, Sylvilagus floridanus, is expected to adjust its life cycle to reproduce in the most suitable season of the year, which may vary depending on the particular conditions of the site where each one lives. The objective of this study was to determine at what time of the year this rabbit reproduces in the xerophilous scrub of the Pedregal of San Ángel, México City, based on an analysis of seasonal variation of the abundance and size of its feces. Monthly systematic sampling of abundance of feces was made at established sites for 4 years and, during the first year, the size of excreta was also recorded. Data was analyzed using a &#967;2 test. It was recorded that small fecal pellets are concentrated in September and that the highest abundance values were recorded between October and December. The data suggest that the reproductive period occurs in August, which is a month of greater food availability. The data obtained do not coincide with the reproductive season recorded by this species in other locations.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Tamaño poblacional]]></kwd>
<kwd lng="es"><![CDATA[Matorral xerófilo]]></kwd>
<kwd lng="es"><![CDATA[Pedregal de San Ángel]]></kwd>
<kwd lng="es"><![CDATA[REPSA]]></kwd>
<kwd lng="en"><![CDATA[Population size]]></kwd>
<kwd lng="en"><![CDATA[Xerophilous shrub]]></kwd>
<kwd lng="en"><![CDATA[Pedregal de San Ángel]]></kwd>
<kwd lng="en"><![CDATA[REPSA]]></kwd>
</kwd-group>
</article-meta>
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