<?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>1870-7459</journal-id>
<journal-title><![CDATA[Huitzil]]></journal-title>
<abbrev-journal-title><![CDATA[Huitzil]]></abbrev-journal-title>
<issn>1870-7459</issn>
<publisher>
<publisher-name><![CDATA[Sociedad para el Estudio y Conservación de las Aves en México, A.C. (CIPAMEX)]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-74592012000200004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Registro de la cotorra argentina (Myiopsitta monachus) en la Ciudad de México y áreas adyacentes]]></article-title>
<article-title xml:lang="en"><![CDATA[Records of the Monk Parakeet (Myiopsitta monachus) in Mexico City and adjacent areas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Albores]]></surname>
<given-names><![CDATA[Jorge E.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Estudios Superiores Zaragoza campus II ]]></institution>
<addr-line><![CDATA[DF ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2012</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>110</fpage>
<lpage>115</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-74592012000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-74592012000200004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-74592012000200004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Reporto registros de la cotorra argentina (Myiopsitta monachus) en seis sitios de la Ciudad de México y áreas adyacentes. Observé varios individuos de esta especie, así como nidos entre agosto de 2008 y marzo de 2012. Los nidos localizados fueron construidos sobre eucaliptos y palmeras, y sólo en un sitio observé la especie anidando y con polluelos. El tamaño de los grupos observados sobrevolando y en nidos varió de 2 a 14 individuos. Estas observaciones son notables ya que el número de registros es escaso y sugieren una posible ampliación en la distribución de la especie en la República Mexicana. Lo anterior requiere la implementación de medidas que permitan controlar la expansión de esta especie en México a través de la reubicación de ciertos individuos en aviarios y el retiro de los nidos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[I report records of the Monk Parakeet (Myiopsitta monachus) in six sites of Mexico City and adjacent areas. I observed nests and several individuals of this species from August 2008 to March 2012. The nests were built on eucalyptus and palm trees, and I observed nesting activity and chicks in one site only. The size of the groups observed when flying and in nests ranged from 2 to 14 individuals. These observations are noteworthy because of the lack of records, suggesting an increase in its distributional area in México. This requires the implementation of control strategies to avoid the expansion of this species in Mexico, through the relocation of individuals in aviaries as well as the removal of nests.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[perico monje]]></kwd>
<kwd lng="es"><![CDATA[especie exótica]]></kwd>
<kwd lng="es"><![CDATA[psitácidos]]></kwd>
<kwd lng="es"><![CDATA[Distrito Federal]]></kwd>
<kwd lng="es"><![CDATA[Valle de México]]></kwd>
<kwd lng="en"><![CDATA[Monk Parakeet]]></kwd>
<kwd lng="en"><![CDATA[exotic species]]></kwd>
<kwd lng="en"><![CDATA[parrots]]></kwd>
<kwd lng="en"><![CDATA[Mexico City]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Nuevos registros y ampliaciones de distribuci&oacute;n</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Registro de la cotorra argentina (<i>Myiopsitta monachus</i>) en la Ciudad de M&eacute;xico y &aacute;reas adyacentes</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="3"><b>Records of the Monk Parakeet (<i>Myiopsitta monachus</i>) in Mexico City and adjacent areas</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>Jorge E. Ram&iacute;rez&#45;Albores.</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Facultad de Estudios Superiores Zaragoza campus II, Universidad Nacional Aut&oacute;noma de M&eacute;xico. Batalla 5 de mayo s/n esquina Fuerte de Loreto, Colonia Ej&eacute;rcito de Oriente, 09230, M&eacute;xico, DF. Direcci&oacute;n actual: Museo de Zoolog&iacute;a, Facultad de Ciencias, Universidad Nacional Aut&oacute;noma de M&eacute;xico. Apartado postal 70&#45;399, 04510, M&eacute;xico, DF.</i> Correo electr&oacute;nico: <a href="mailto:jorgeramirez22@hotmail.com">jorgeramirez22@hotmail.com</a>.</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Recibido: 8 de marzo de 2012.    <br> 	Revisi&oacute;n aceptada: 7 de agosto de 2012.    <br> 	Editora asociada: Katherine Renton.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Reporto registros de la cotorra argentina (<i>Myiopsitta monachus</i>) en seis sitios de la Ciudad de M&eacute;xico y &aacute;reas adyacentes. Observ&eacute; varios individuos de esta especie, as&iacute; como nidos entre agosto de 2008 y marzo de 2012. Los nidos localizados fueron construidos sobre eucaliptos y palmeras, y s&oacute;lo en un sitio observ&eacute; la especie anidando y con polluelos. El tama&ntilde;o de los grupos observados sobrevolando y en nidos vari&oacute; de 2 a 14 individuos. Estas observaciones son notables ya que el n&uacute;mero de registros es escaso y sugieren una posible ampliaci&oacute;n en la distribuci&oacute;n de la especie en la Rep&uacute;blica Mexicana. Lo anterior requiere la implementaci&oacute;n de medidas que permitan controlar la expansi&oacute;n de esta especie en M&eacute;xico a trav&eacute;s de la reubicaci&oacute;n de ciertos individuos en aviarios y el retiro de los nidos.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> perico monje, especie ex&oacute;tica, psit&aacute;cidos, Distrito Federal, Valle de M&eacute;xico.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">I report records of the Monk Parakeet (<i>Myiopsitta monachus</i>) in six sites of Mexico City and adjacent areas. I observed nests and several individuals of this species from August 2008 to March 2012. The nests were built on eucalyptus and palm trees, and I observed nesting activity and chicks in one site only. The size of the groups observed when flying and in nests ranged from 2 to 14 individuals. These observations are noteworthy because of the lack of records, suggesting an increase in its distributional area in M&eacute;xico. This requires the implementation of control strategies to avoid the expansion of this species in Mexico, through the relocation of individuals in aviaries as well as the removal of nests.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key words:</b> Monk Parakeet, exotic species, parrots, Mexico City, Mexico.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Introducci&oacute;n</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Las invasiones biol&oacute;gicas resultan de la introducci&oacute;n de especies desde su ambiente nativo a una &aacute;rea biogeogr&aacute;fica donde antes no estaban presentes, por lo cual se denominan "especies ex&oacute;ticas" (Mooney y Hobbs 2000, Duncan <i>et al.</i> 2003). Las especies ex&oacute;ticas han sido reconocidas como una de las mayores amenazas para la biodiversidad (Williamson 1996, Aguirre <i>et al</i>. 2009, Vi&eacute; <i>et al</i>. 2009). T&iacute;picamente, las especies ex&oacute;ticas persisten en peque&ntilde;as cantidades durante las primeras etapas de colonizaci&oacute;n y posteriormente, la poblaci&oacute;n aumenta de forma exponencial hasta que la especie puede convertirse en una plaga (Duncan <i>et al</i>. 2003). Por lo tanto, es cr&iacute;tico detectar el establecimiento de especies ex&oacute;ticas en las primeras etapas para controlar su expansi&oacute;n poblacional (CANEI 2010). Un ejemplo es la cotorra argentina o perico monje (<i>Myiopsitta monachus</i>), un psit&aacute;cido cuya distribuci&oacute;n nativa es Sudam&eacute;rica, principalmente Uruguay, sur de Brasil, centro de Chile, norte y centro de Argentina, Paraguay y centro y sur de Bolivia (Meyer de Schauensee 1966, 1971, Olrog 1968, Couve y Vidal 2003). Habita en tierras bajas, bosques abiertos, sabanas, zonas ribere&ntilde;as, ambientes abiertos con &aacute;rboles dispersos y &aacute;reas urbanas, principalmente en parques, jardines y plazas (Arambur&uacute; y Corbal&aacute;n 2000, Couve y Vidal 2003).</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Myiopsitta monachus</i> es una especie en expansi&oacute;n fuera de su &aacute;rea de distribuci&oacute;n nativa debido a la liberaci&oacute;n o escape de individuos cautivos como mascota y por su gran adaptaci&oacute;n a diferentes condiciones clim&aacute;ticas (Weathers y Caccamise 1975). Esta especie fue introducida en EUA a finales de la d&eacute;cada de los 60 y principios de los 70. En 1975 fue reportada en el sur de Espa&ntilde;a y m&aacute;s tarde extendi&oacute; su distribuci&oacute;n a otros pa&iacute;ses europeos (Inglaterra, Portugal, Austria, Francia, Holanda, B&eacute;lgica, Italia, Suiza, Alemania y Rep&uacute;blica Checa), as&iacute; como en otras regiones como Jap&oacute;n, Israel, Kenia, Canad&aacute;, y algunas islas del Caribe (Neidermyer y Hickey 1977, Batllori y Nos 1985, Spano y Truffi 1986, Lever 1987, Truffi y !tanstn" 1997, Pruett&#45;Jones y Tarvin 1998, Butler 2002, Mu&ntilde;oz y Real 2006, Buhrmann&#45;Deever <i>et al.</i> 2007, Roll <i>et al</i>. 2008) m&aacute;s recientemente se ha reportado en &aacute;reas tropicales como M&eacute;xico (Ch&aacute;vez 1999, MacGregor&#45;Fors <i>et al</i>. 2011,). Para M&eacute;xico, <i>M. monachus</i> se registr&oacute; por primera vez en el Vaso Regulador El Cristo en Naucalpan, Estado de M&eacute;xico (Ch&aacute;vez 1999). Actualmente, se han registrado individuos de <i>M. monachus</i> en la zona metropolitana del Valle de M&eacute;xico, por ejemplo en Naucalpan y en Cuautitl&aacute;n Izcalli (Ch&aacute;vez 1999, S&aacute;nchez 2010, V&aacute;zquez <i>et al</i>. 2011), y en Xochimilco (&Aacute;lvarez&#45;Romero <i>et al</i>. 2008), as&iacute; como en diferentes estados de la rep&uacute;blica como Oaxaca, Quer&eacute;taro, Michoac&aacute;n, Baja California Sur, Puebla, Chiapas y Guanajuato (&Aacute;lvarez&#45;Romero <i>et al</i>. 2008, Pablo&#45;L&oacute;pez 2009, MacGregor&#45;Fors <i>et al</i>. 2011, Pineda&#45;L&oacute;pez y Malagamba 2011).</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Myiopsitta monachus</i> es el &uacute;nico psit&aacute;cido que construye nidos comunales formados por uno o varios dormitorios voluminosos e independientes sobre ramas de &aacute;rboles altos y aislados (Navarro <i>et al</i>. 1992, Mu&ntilde;&oacute;z y Real 2006, Burger y Gochfeld 2009), los cuales construyen entretejiendo con ramas y pueden albergar varias parejas (Forshaw 1989, Mart&iacute;nez y Gonz&aacute;lez 2004). Los nidos comunales dentro de su distribuci&oacute;n nativa pueden llegar a albergar de 20 a m&aacute;s de 100 individuos (Lanning 1991, Wagner 2012). Debido a su elevado &eacute;xito reproductivo y a su r&aacute;pida adaptaci&oacute;n ambiental, en algunas regiones de Argentina, Uruguay, Estados Unidos e Inglaterra es considerada una plaga para la agricultura debido al da&ntilde;o que causa en los &aacute;rboles frutales, adem&aacute;s de que consume granos y frutas ocasionando p&eacute;rdidas econ&oacute;micas (Dabbene 1935, Davis 1974; Bucher 1984, 1992; Tillman <i>et al</i>. 2000, Mart&iacute;nez y Gonz&aacute;lez 2004, Tayleur 2010). Otro problema es que construyen sus nidos dentro de columnas y entre aisladores de l&iacute;neas de transmisi&oacute;n el&eacute;ctrica, ocasionando graves afectaciones a estas (Bucher y Martin 1987, Avery <i>et al</i>. 2002, Newman <i>et al</i>. 2004, Tillman <i>et al.</i> 2004, Pruett&#45;Jones <i>et al</i>. 2007, Acosta 2009).</font></p>  	    <p align="justify"><font face="verdana" size="2">En el presente manuscrito reporto el registro de individuos de <i>M. monachus</i> en diferentes sitios de la ciudad de M&eacute;xico y &aacute;reas adyacentes. La relevancia de estas observaciones radica en la r&aacute;pida adaptaci&oacute;n ambiental de esta especie ex&oacute;tica. Estos registros representan expansiones en su distribuci&oacute;n en la ciudad de M&eacute;xico y zona metropolitana.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Observaciones</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Las observaciones se realizaron de agosto de 2008 a marzo de 2012 en diferentes sitios de la Ciudad de M&eacute;xico y zona metropolitana: Facultad de Estudios Superiores Zaragoza campus II (19&deg;22'N, 99&deg;02'O; 2242 msnm), zona residencial Acueducto de Guadalupe (19&deg;31'N, 99&deg;09'O; 2254 msnm), Deportivo Francisco I. Madero (19&deg;22'N, 99&deg;02'O; 2238 msnm), Parque Ecol&oacute;gico Xochimilco (19&deg;17'N, 99&deg;05'O; 2240 msnm), Viveros de Coyoac&aacute;n (19&deg;21'N, 99&deg;10'O; 2265 msnm) y El Colegio de Postgraduados campus Montecillo en Texcoco, Estado de M&eacute;xico (19&deg;28'N, 98&deg;53'O; 2249 msnm; <a href="#f1">Figura 1</a>). La vegetaci&oacute;n en estos sitios est&aacute; conformada principalmente por especies ex&oacute;ticas como eucalipto (<i>Eucalyptus globulus</i> y <i>E. camaldulensis</i>) y pirul (<i>Schinus molle</i>), y especies nativas como pino (<i>Pinus</i> sp.) y encino (<i>Quercus</i> sp.). Esta vegetaci&oacute;n est&aacute; presente en las &aacute;reas verdes o como &aacute;rboles dispersos rodeados de casas&#45;habitaci&oacute;n, edificios, calles y avenidas.</font></p>  	    <p align="center"><font face="verdana" size="2"><a name="f1"></a></font></p>  	    <p align="center"><font face="verdana" size="2"><img src="/img/revistas/huitzil/v13n2/a4f1.jpg"></font></p>  	    <p align="justify"><font face="verdana" size="2">En la Facultad de Estudios Superiores (FES) Zaragoza campus II se observaron de dos a cuatro individuos volando y perchando en algunos arbustos y &aacute;rboles entre las 07:00 y 09:00 h. de agosto de 2008 a septiembre de 2011. Permanec&iacute;an de 5 a 30 min y despu&eacute;s volaban en direcci&oacute;n noroeste. A finales de noviembre de 2011, empezaron a construir un par de nidos a las afueras de la FES en un &aacute;rbol de eucalipto<i>,</i> donde hasta marzo de 2012 se observaron cuatro individuos en el nido (<a href="#f2">Figura 2a</a>). En Acueducto de Guadalupe, de agosto a diciembre de 2008, observ&eacute; de dos a cuatro individuos a diferentes horas del d&iacute;a (principalmente por la ma&ntilde;ana) sobrevolando la zona. En enero de 2009, se establecieron un par de ellos en una palmera (<i>Washingtonia robusta</i>) y en marzo del mismo a&ntilde;o tuvieron una camada de dos polluelos. Sin embargo, uno de ellos seg&uacute;n los comentarios de los vecinos, se cay&oacute; del nido y muri&oacute;. En el Deportivo Francisco I. Madero, de agosto de 2008 a octubre de 2011, observ&eacute; de dos a seis individuos sobrevolando y perchando en &aacute;rboles de eucalipto (<i>Eucalyptus</i> sp<i>.</i>). En los alrededores del Parque Ecol&oacute;gico Xochimilco he observado de cuatro a 10 individuos en &aacute;rboles de eucalipto. En Viveros de Coyoac&aacute;n, observ&eacute; de dos a cuatro individuos sobrevolando la parte sureste y perchando en &aacute;rboles de eucalipto de junio a agosto de 2009. Finalmente, en el Colegio de Postgraduados observ&eacute; hasta 12 individuos perchando en &aacute;rboles de eucalipto, pino y pirul<i>,</i> y aliment&aacute;ndose de los brotes de &aacute;rboles de chabacano (<i>Armeniaca</i> sp.) de enero a marzo de 2012. En este sitio localic&eacute; dos nidos en palmeras (<i>W. robusta</i>), aproximadamente a 45 y 55 m de la caseta de vigilancia de la entrada al Colegio; en uno observ&eacute; hasta 14 individuos y en el otro dos individuos (<a href="#f2">Figura 2b</a>).</font></p>  	    <p align="center"><font face="verdana" size="2"><a name="f2"></a></font></p>  	    <p align="center"><font face="verdana" size="2"><img src="/img/revistas/huitzil/v13n2/a4f2.jpg"></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Discusi&oacute;n</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Los registros presentados en este manuscrito son importantes ya que, a la fecha, no exist&iacute;a informaci&oacute;n acerca de la presencia de la especie en los sitios descritos y sugiere la ampliaci&oacute;n de su distribuci&oacute;n en la ciudad de M&eacute;xico y &aacute;reas adyacentes. Adem&aacute;s, estos registros ponen en contexto la necesidad de seguir estudiando los patrones de distribuci&oacute;n de <i>M. monachus</i>, principalmente en zonas urbanas, y la de conocer su r&aacute;pida adaptaci&oacute;n a diferentes condiciones ambientales. As&iacute;, parece probable que <i>M. monachus</i> contin&uacute;e colonizando &aacute;reas favorables en M&eacute;xico mientras no exista un control en su venta y ocurra la liberaci&oacute;n de ejemplares cautivos. En otras regiones, la especie ha ocasionado impactos negativos tanto ecol&oacute;gicos como econ&oacute;micos por la competencia con especies nativas, transmisi&oacute;n de enfermedades, y da&ntilde;os a cultivos y l&iacute;neas de transmisi&oacute;n el&eacute;ctrica (Acha y Szyfres 1927 en G&oacute;mez de Silva <i>et al</i>. 2005, Dabbene 1935, Davis 1974, Bucher 1984, 1992; Bucher y Martin 1987, Mart&iacute;nez y Gonz&aacute;lez 2004, Newman <i>et al</i>. 2004, Acosta 2009, Tayleur 2010). Impedir la importaci&oacute;n de ejemplares de <i>M. monachus</i> es una medida preventiva que deber&iacute;a de implementarse.</font></p>  	    <p align="justify"><font face="verdana" size="2">La informaci&oacute;n generada sobre <i>M. monachus</i> en algunas regiones ha sido acerca de su alimentaci&oacute;n (Aramburu y Corbal&aacute;n 2000, South y Pruett&#45;Jones 2000), anidaci&oacute;n y &eacute;xito reproductivo (Lanning 1991, Navarro <i>et al.</i> 1992, Arambur&uacute; 1996, 1997; Port y Brewer 2004), y estimaci&oacute;n poblacional (South y Pruett&#45;Jones 2000, Dom&egrave;nech <i>et al</i>. 2003, Tayleur 2010); sin embargo, factores como el &eacute;xito reproductivo y abundancia son poco conocidos en M&eacute;xico o no se ha ahondado en el conocimiento sobre su tasa reproductiva y abundancia, factores trascendentales para conocer el riesgo potencial de esta especie ex&oacute;tica en M&eacute;xico. En general, en el Valle de M&eacute;xico, as&iacute; como en otras regiones del pa&iacute;s, a pesar de que el tama&ntilde;o de los grupos y de las poblaciones de <i>M. monachus</i> es peque&ntilde;o y que se concentran en pocos sitios, esta especie tiene el potencial de causar da&ntilde;os importantes a la infraestructura urbana, cultivos agr&iacute;colas y a la fauna nativa como ha ocurrido en otros pa&iacute;ses. Por lo anterior, se requiere la implementaci&oacute;n de medidas que permitan controlar la expansi&oacute;n de esta especie en M&eacute;xico a trav&eacute;s de la reubicaci&oacute;n de ciertos individuos en aviarios, as&iacute; como el retiro de los nidos.</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Agradecimientos</b></font></p>  	    <p align="justify"><font face="verdana" size="2">A la Facultad de Estudios Superiores Zaragoza campus II, Viveros de Coyoac&aacute;n, Deportivo Francisco I. Madero y El Colegio de Posgraduados por las facilidades otorgadas. A Rub&eacute;n Pineda y un revisor an&oacute;nimo por sus valiosos comentarios y sugerencias realizadas al manuscrito.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Literatura citada</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Acosta, H. 2009. Motivos e implicancias de nidos de <i>Myiopsitta monachus</i> en columnas de hormig&oacute;n armado de 66 kV pertenecientes a la ANDE. XIII Encuentro Regional Iberoamericano de CIGRE. Puerto Iguazu, Argentina.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4212003&pid=S1870-7459201200020000400001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Aguirre M., A., R. Mendoza, H. Arredondo, L. Arriaga, E. Campos, S. Contreras&#45;Balderas, M. Guti&eacute;rrez, F. Espinosa, I. Fern&aacute;ndez, L. Galaviz, F. Garc&iacute;a, D. Lazcano, M. Mart&iacute;nez, M. Meave, R. Medell&iacute;n, E. Naranjo, M. Olvera, M. P&eacute;rez, G. Rodr&iacute;guez, G. Salgado, A. Samaniego, E. Su&aacute;rez, H. Vibrans y J. Zertuche<i>.</i> 2009. Especies ex&oacute;ticas invasoras: impactos sobre las poblaciones de flora y fauna, los procesos ecol&oacute;gicos y la econom&iacute;a. Pp. 277-318. <i>In</i>: R. Dirzo, R. Gonz&aacute;lez e I.J. March (comps.). Capital natural de M&eacute;xico, vol. II: Estado de conservaci&oacute;n y tendencias de cambio<i>.</i> CONABIO. M&eacute;xico, DF.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4212005&pid=S1870-7459201200020000400002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">&Aacute;lvarez&#45;Romero, J., R.A. Medell&iacute;n, A. Oliveras de Ita, H. G&oacute;mez de Silva y O. S&aacute;nchez. 2008. Animales ex&oacute;ticos en M&eacute;xico: una amenaza para la biodiversidad. CONABIO, Instituto de Ecolog&iacute;a&#45;UNAM, SEMARNAT. M&eacute;xico, DF.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4212007&pid=S1870-7459201200020000400003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Arambur&uacute;, R. 1996. Nidadas supernormales en cotorra com&uacute;n <i>Myiopsitta monachus monachus</i> (Aves: Psittacidae). Ornitolog&iacute;a Neotropical 7:155&#45;156.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4212009&pid=S1870-7459201200020000400004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Arambur&uacute;, R. 1997. 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