<?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>0366-5232</journal-id>
<journal-title><![CDATA[Caldasia]]></journal-title>
<abbrev-journal-title><![CDATA[Caldasia]]></abbrev-journal-title>
<issn>0366-5232</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ciencias Naturales, Facultad de Ciencias-Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0366-52322018000100027</article-id>
<article-id pub-id-type="doi">10.15446/caldasia.v40n1.68817</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Duration and intensity of primary molt in two neotropical grasslands Passerines]]></article-title>
<article-title xml:lang="es"><![CDATA[Duración e intensidad de la muda de plumas primarias en dos Passeriformes neotropicales de pastizales]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Palacios]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Losada-Prado]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Echeverry-Gálvis]]></surname>
<given-names><![CDATA[María Ángela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ibagué Faculty of Natural Sciences and Mathematics NATURATU Research Group]]></institution>
<addr-line><![CDATA[Ibagué ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Tolima Faculty of Sciences Zoology Research Group]]></institution>
<addr-line><![CDATA[Ibagué ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontificia Universidad Javeriana Faculty of Environmental and Rural Studies Department of Ecology and Territorial Development]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<fpage>27</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0366-52322018000100027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0366-52322018000100027&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0366-52322018000100027&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Description of patterns and mechanics of bird molt have permitted understanding and have clarified temporal and spatial dynamics in the life cycles of several temperate species. Few studies evaluate these aspects in Neotropical birds, which hinders their discussion in functional and evolutionary contexts. Here we compare primary molt duration and intensity of flight feather molt in two Neotropical passerine species, Blue-black Grassquit and Gray Seedeater. The study took place north of the department of Tolima-Colombia. Birds were captured and were marked with colored bands. Molt duration estimates follow Pimm&#8217;s and Rohwer and Wang&#8217;s methods, while molt intensity was evaluated using Rohwer&#8217;s proposal. Primary molt duration of Blue-black Grassquit was between 59 days (CI 95 % = 48-74) and 80 days (CI 95 % = 64-96), while the duration for Gray Seedeater was between 80 days (CI 95 % = 66-105) and 100 days (CI 95 % = 75-124). Estimates were consistent with those of other Neotropical Passerines with similar body mass, with a longer duration than that of temperate birds, evidence in favor of the hypothesis of slower pace of life in tropical birds. Method by Rohwer and Wang presents methodological advantages that would permit evaluating molt duration in species with low capture rates, suspended molts, or low molt synchrony between individuals. Molt intensity was higher in Gray Seedeater (13 feathers) than Blue-black Grassquit (9.3 feathers), and both were greater compared with other Passerines, which may represent an adaptive response to specific ecological pressures.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La descripción de patrones y mecánica de muda de las aves ha permitido esclarecer la dinámica en ciclos de vida de especies de zonas templadas. Pocos estudios evalúan estos aspectos en aves neotropicales, dificultando su discusión funcional y evolutiva. Acá comparamos la duración de muda de primarias e intensidad de muda de vuelo en dos especies de paseriformes neotropicales, V. jacarina y S. intermedia. Desarrollamos el estudio al norte del departamento de Tolima (Colombia); capturamos las aves en un matorral y las marcamos con anillos de colores. Utilizamos los métodos de Pimm, y Rohwer y Wang para estimar la duración, y calculamos la intensidad de muda según Rohwer. La duración de muda de V. jacarina fue de 59 días (IC 95 % = 48-74) y 80 días (IC 95 % = 64-96), mientras que para S. intermedia fue de 80 (IC 95 % = 66-105) y 100 días (IC 95 % = 75-124). Estos resultados fueron consistentes con la duración de muda de paseriformes con masas similares, aunque mayores que en especies de latitudes altas, apoyando la hipótesis del bajo ritmo de vida en evaluar la duración en especies con baja captura, con muda suspendida, o baja asincronía entre individuos. La intensidad de muda fue mayor en S. intermedia (13 plumas) que en V. jacarina (9,3 plumas), resultados mayores que otros paseriformes neotropicales, que pueden representar una respuesta adaptativa a presiones ecológicas específicas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Volatinia jacarina]]></kwd>
<kwd lng="en"><![CDATA[Sporophila intermedia]]></kwd>
<kwd lng="en"><![CDATA[Gray Seedeater]]></kwd>
<kwd lng="en"><![CDATA[molt patterns Neotropical birds]]></kwd>
<kwd lng="en"><![CDATA[Upper Magdalena Valley]]></kwd>
<kwd lng="es"><![CDATA[aves Neotropicales]]></kwd>
<kwd lng="es"><![CDATA[patrones de muda]]></kwd>
<kwd lng="es"><![CDATA[Sporophila intermedia]]></kwd>
<kwd lng="es"><![CDATA[valle del Magdalena]]></kwd>
<kwd lng="es"><![CDATA[Volatinia jacarina]]></kwd>
</kwd-group>
</article-meta>
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