<?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>0188-8897</journal-id>
<journal-title><![CDATA[Hidrobiológica]]></journal-title>
<abbrev-journal-title><![CDATA[Hidrobiológica]]></abbrev-journal-title>
<issn>0188-8897</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Metropolitana, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-88972022000200075</article-id>
<article-id pub-id-type="doi">10.24275/uam/izt/dcbs/hidro/2022v32n2/serrano</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación de la densidad y abundancia de la nutria neotropical (Lontra longicuadis annectens Olfers, 1818) en el Sistema Lagunar de Alvarado, Veracruz]]></article-title>
<article-title xml:lang="en"><![CDATA[Density and abundance estimation of the neotropical otter (Lontra longicuadis annectens Olfers, 1818) in the Alvarado Lagoon System, Veracruz]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Retureta-Delgado]]></surname>
<given-names><![CDATA[Italia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Naval-Ávila]]></surname>
<given-names><![CDATA[Celina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Basáñez-Muñoz]]></surname>
<given-names><![CDATA[Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lammoglia-Villagómez]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Rojas]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Cuerpo Académico Manejo de Ambientes Marinos y Costeros ]]></institution>
<addr-line><![CDATA[Tuxpan Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Veracruzana Facultad de Ciencias Biológicas y Agropecuarias ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Laboratorio de Conservación Biológica ]]></institution>
<addr-line><![CDATA[ Hidalgo]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>32</volume>
<numero>2</numero>
<fpage>75</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-88972022000200075&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-88972022000200075&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-88972022000200075&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Antecedentes En México la nutria neotrópical (Lontra longicaudis annectens, Olfers, 1818) se encuentra ampliamente distribuida y sus poblaciones están amenazadas.  Objetivos Estimar la densidad y abundancia de la nutria de río neotropical en el Sistema Lagunar de Alvarado (SLA), Veracruz.  Métodos El SLA tiene una extensión de 51,960.52 hectáreas y está compuesto por lagunas costeras, lagunas interiores y ríos. Por medio de la técnica de muestreo a distancia con transectos sistemáticos, se estimó la distribución, densidad y abundancia de la nutria neotropical en el SLA.  Resultados Se obtuvieron un total de 25 avistamientos independientes de nutrias, siendo los ríos Limón, Blanco y Culebrilla donde se registraron con mayor frecuencia. Se estimó una abundancia de 934 (% C.V.= 20.45) nutrias para todo el SLA, con una densidad de 0.179 organismos / km2 (% C.V.= 20.45).  Conclusiones Este estudio contribuye a determinar una primera estimación directa de la densidad, para esta especie en una región de México. La importancia de este estudio es la precisión con la que se estima la población de nutrias, lo que permite tener una información más robusta para tomar decisiones y acciones para el manejo y conservación de la especie]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Background In Mexico, the neotropical otter (Lontra longicaudis annectens, Olfers, 1818) is widely distributed, and its populations are threatened.  Objectives To estimate the density and abundance of neotropical river otters in the Alvarado Lagoon System (SLA), Veracruz.  Methods The SLA has an extension of 51,960.52 hectares and is made up of coastal lagoons, interior lagoons, and rivers. We employed the distance sampling technique with systematic transects to estimate the distribution, density, and abundance of the Neotropical otter in the SLA.  Results A total of 25 independent otter sightings were obtained; the Limón, Blanco, and Culebrilla rivers are the areas with the most significant sights. An abundance of 934 (% C.V.= 20.45) otters was estimated for the entire SLA, with a density of 0.179 organisms/km2 (% C.V.= 20.45).  Conclusions This study contributes to determining the first direct estimation of density for this species in a region of Mexico. The importance of this study is the precision with which the otter population was estimated, which allows for more robust information to make decisions and to take actions for the management and conservation of the species.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[conservación]]></kwd>
<kwd lng="es"><![CDATA[distribución]]></kwd>
<kwd lng="es"><![CDATA[ecosistemas]]></kwd>
<kwd lng="es"><![CDATA[fauna]]></kwd>
<kwd lng="es"><![CDATA[Golfo de México]]></kwd>
<kwd lng="en"><![CDATA[conservation]]></kwd>
<kwd lng="en"><![CDATA[distribution]]></kwd>
<kwd lng="en"><![CDATA[ecosystems]]></kwd>
<kwd lng="en"><![CDATA[fauna]]></kwd>
<kwd lng="en"><![CDATA[Gulf of Mexico]]></kwd>
</kwd-group>
</article-meta>
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