<?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>S1870-34532015000200412</article-id>
<article-id pub-id-type="doi">10.1016/j.rmb.2015.04.002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Seasonal dietary differences of the Yellow-footed Gull (Charadriiformes: Laridae) in Isla Partida Norte, Gulf of California, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Diferencias estacionales en la dieta de la gaviota de patas amarillas (Charadriiformes: Laridae) en isla Partida Norte, golfo de California, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Martínez]]></surname>
<given-names><![CDATA[José Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[L. Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arroyo-Cabrales]]></surname>
<given-names><![CDATA[Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[Enrico A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología Laboratorio de Sistemas de Información Geográfica]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Biología Estación de Biología Chamela]]></institution>
<addr-line><![CDATA[San Patricio Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto Nacional de Antropología e Historia Laboratorio de Arqueozoología ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Zoología]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>Mexico</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>2</numero>
<fpage>412</fpage>
<lpage>418</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-34532015000200412&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-34532015000200412&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-34532015000200412&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The Yellow-footed Gull (Larus livens ) is one of the few members of the genus Larus inhabiting the Gulf of California. Its breeding biology, nest phenology, and behavior have been long studied but little is known about seasonal changes in its diet. In this study, we tested if the diet of Yellow-footed Gull differed between reproductive (April and July) and non-reproductive (December). The frequency of occurrence of food items in gull's pellets and food niche breadth (FNB) and Levin's diversity (Best ) indexes for each sampling period (April, July, and December), as well as Pianka's dietary overlap (O %) and Morisita's (MI) dietary similarity indices between periods were estimated. We identified 9 taxa classes, whose frequency of occurrence varied significantly between all comparisons (April and December, July and December, April and July), and between reproductive (April-July) and non-reproductive seasons. FNB and Best diversity indexes indicated that Yellow-footed Gull has a broader niche spectrum during the breeding season (April-July), while dietary overlap estimators (O % and MI) were higher between July vs. December and April vs. December, but lower in April vs. July. Results are contrasted with previous studies of gull's feeding ecology, and possible effects of local human activity are discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La gaviota de patas amarillas (Larus livens ) es uno de los pocos miembros del género Larus que habitan el Golfo de California. Su biología reproductiva, fenología de nido y comportamiento se han estudiado durante mucho tiempo, pero poco se sabe acerca de los cambios estacionales en su dieta. En este estudio se probó si la dieta de la gaviota de patas amarillas fue diferente entre temporadas reproductivas (abril y julio) y no reproductivas (diciembre). Se evaluó la frecuencia de presencia en egagrópilas, la amplitud de nicho trófico (FNB) y el índice de diversidad de Levin (Best ) para cada período de muestreo (abril, julio y diciembre), así como la superposición de la dieta de Pianka (O %) y el índice de similitud de Morisita (MI) entre períodos. Se identificaron 9 clases de taxones, en los que la frecuencia varió significativamente entre todas las comparaciones (abril y diciembre, julio y diciembre, abril y julio) y entre los períodos reproductivos (abril-julio) y no reproductivos. Los índices FNB y Best indicaron que la gaviota de patas amarillas tiene un espectro de nicho más amplio durante la temporada reproductiva (abril-julio), mientras que los estimadores de solapamiento dietéticos (O % y MI) fueron más altos entre julio vs. diciembre y abril vs. diciembre, pero menor en abril vs. julio. Los resultados se contrastan con estudios previos de ecología de alimentación de gaviotas y se discuten los posibles efectos de la actividad humana local.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Gull pellets]]></kwd>
<kwd lng="en"><![CDATA[Feeding ecology]]></kwd>
<kwd lng="en"><![CDATA[Larus livens]]></kwd>
<kwd lng="en"><![CDATA[Food niche breadth]]></kwd>
<kwd lng="es"><![CDATA[Egagrópilas]]></kwd>
<kwd lng="es"><![CDATA[Ecología de la alimentación]]></kwd>
<kwd lng="es"><![CDATA[Larus livens]]></kwd>
<kwd lng="es"><![CDATA[Amplitud de nicho alimentario]]></kwd>
</kwd-group>
</article-meta>
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