<?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>S2007-33642018000100061</article-id>
<article-id pub-id-type="doi">10.12933/therya-18-519</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Population density of Saguinus leucopus (Mammalia: Primates) and landscape characteristics in eastern Antioquia, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonell Rojas]]></surname>
<given-names><![CDATA[William Yezid]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarez Rincon]]></surname>
<given-names><![CDATA[Mario Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Roncancio Duque]]></surname>
<given-names><![CDATA[Néstor Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Wildlife Conservation Society  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Parques Nacionales Naturales de Colombia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>61</fpage>
<lpage>68</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33642018000100061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33642018000100061&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33642018000100061&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Saguinus leucopus is an endemic primate of Colombia, listed as an &#8220;Endangered&#8221; species by IUCN because of its restricted distribution range in areas with intense colonization activity. Population density is a key factor in understanding the trends of S. leucopus populations after disturbance by the anthropogenic transformations of the landscape. Density is determined by its carrying capacity, being a dynamic parameter that varies in time and space. The trends in certain populations are inconclusive, as assessments were performed just one in a few sites. Besides, knowing the variables that govern the changes in population size as well as its regulation is important, starting with an empirical estimate of the number of individuals in populations. The objectives of this study were to estimate the population density of S. leucopus and determine its relationship with plant diversity and landscape characteristics. This study was developed in a forest, located in the municipality of San Rafael, Antioquia. The population density of S. leucopus was estimated using the distance-sampling method with linear transects; data were processed with the program DISTANCE 6.0. The physical features, structure and diversity of plant communities were also determined. The estimated population density of S. leucopus was 46.5 individuals/km2 and 12.3 groups/km2, with coefficients of variation of 19.2 % and 16.8 %, respectively. The component with the major contribution to the variance of density was the encounter rate, with 64.7 %. The study area is an open forest with moderate connectivity and a tendency to be circular; the vegetation cover is relatively homogeneous, being in the same stage of natural regeneration across its area. The estimated population density of S. leucopus is within the average reported for the species. Populations of S. leucopus tend to vary significantly according to the particular features of the local environment. In order to estimate the conservation status of the species through the analysis of variations in population density, this type of work should be linked to a monitoring strategy. In the study area, human activities over time have been key in determining the structure of the current vegetation. The population studied meets all the requirements to be in a good condition, since the continuous forest is protected and artificial structures built on-site allow the white-footed tamarin to forage and move; thus, it can be inferred that local populations inhabiting the study area are not isolated.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Saguinus leucopus es un primate endémico de Colombia, declarado como especie &#8220;En Peligro&#8221; por la IUCN porque su rango de distribución es restringido y se encuentra en áreas con alta actividad de colonización. La densidad poblacional es un factor importante para entender las tendencias de las poblaciones de S. leucopus después de ser perturbadas por las transformaciones del paisaje. La densidad está determinada por su capacidad de carga y es un parámetro dinámico que varía en el tiempo y en el espacio; con una evaluación realizada en pocos sitios en un momento en el tiempo, no se puede ser concluyente acerca de las tendencias que pueden seguir ciertas poblaciones. Es importante conocer los factores que determinan los cambios en el tamaño poblacional y los procesos que rigen su regulación, comenzando con una estimación empírica del número de individuos en las poblaciones. El objetivo de este trabajo fue estimar la densidad poblacional de S. leucopus y determinar su relación con la diversidad vegetal y características del paisaje. Este estudio se desarrolló en un bosque ubicado en el municipio de San Rafael, Antioquia. Para estimar la densidad poblacional de S. leucopus se usó el método de muestreo por distancias con transectos lineales. Los datos se usaron para estimar la densidad poblacional de S. leucopus utilizando el programa DISTANCE 6.0. Se determinaron características físicas y de estructura y diversidad vegetal. La densidad poblacional estimada de S. leucopus fue de 46.5 individuos/km2 y 12.3 grupos/km2, con coeficientes de variación del 19.2 % y 16.8 % respectivamente. El componente que más aportó a la varianza de la densidad fue la tasa de encuentro en un 64.7 %. El área de estudio es un bosque abierto con conectividad media y tendencia a ser circular, presentando homogeneidad en la cobertura vegetal con la mayoría de sus zonas en la misma etapa de regeneración natural. La densidad poblacional de S. leucopus obtenida se considera la media para la especie. Las poblaciones de S. leucopus tienden a presentar cambios significativos de acuerdo a las especificidades del ambiente. Para determinar el estado de conservación de la especie a través del análisis de las variaciones de la densidad poblacional, es necesario que este tipo de trabajos estén vinculados a un plan de monitoreo. Es probable que, en el área, actividades humanas que se han realizado a lo largo del tiempo, hayan determinado la estructura de la vegetación actual. La población estudiada, tiene las condiciones necesarias para encontrarse en buen estado, gracias a que el bosque continuo está protegido y las estructuras artificiales que allí se encuentran permiten al tití gris forrajear y desplazarse, así, se puede inferir que los grupos del área estudiada no se encuentran aislados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[endemic]]></kwd>
<kwd lng="en"><![CDATA[fragmentation]]></kwd>
<kwd lng="en"><![CDATA[linear transects]]></kwd>
<kwd lng="en"><![CDATA[populations]]></kwd>
<kwd lng="en"><![CDATA[threats]]></kwd>
<kwd lng="es"><![CDATA[conservation]]></kwd>
<kwd lng="es"><![CDATA[endemic]]></kwd>
<kwd lng="es"><![CDATA[fragmentation]]></kwd>
<kwd lng="es"><![CDATA[linear transects]]></kwd>
<kwd lng="es"><![CDATA[populations]]></kwd>
<kwd lng="es"><![CDATA[threats]]></kwd>
</kwd-group>
</article-meta>
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