<?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>0185-3880</journal-id>
<journal-title><![CDATA[Ciencias marinas]]></journal-title>
<abbrev-journal-title><![CDATA[Cienc. mar]]></abbrev-journal-title>
<issn>0185-3880</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-38802017000400285</article-id>
<article-id pub-id-type="doi">10.7773/cm.v43i4.2704</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[First field-based estimate of Antillean manatee abundance in the San Pedro River system suggests large errors in current estimates for Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[La primera estimación de la abundancia de manatí antillano en el sistema del río San Pedro, basada en datos de campo, sugiere grandes errores en las estimaciones actuales para México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Puc-Carrasco]]></surname>
<given-names><![CDATA[Gissel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[Benjamín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[León David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Solís]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,El Colegio de la Frontera Sur  ]]></institution>
<addr-line><![CDATA[Chetumal Quintana Roo]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[Villahermosa Tabasco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>43</volume>
<numero>4</numero>
<fpage>285</fpage>
<lpage>299</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-38802017000400285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-38802017000400285&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-38802017000400285&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Fluvial-lagoon systems like the San Pedro River, a tributary of the Usumacinta River, are important habitats for Antillean manatees. These systems are characterized by complex watercourses that contain water with high turbidity levels, which have historically limited manatee studies in hydrological basins on the eastern coast of Mexico. This study aimed to estimate manatee density in the San Pedro River system and to determine how this density varies with changes in water level. Density was estimated using counts detected by side-scan sonar (SSS). Two monthly navigation sessions were conducted from January to June 2016. Each session consisted of running 3 consecutive boat surveys along a 23-km-long transect at a speed of 10 km/h. Manatees were detected with a Humminbird SSS unit. A total of 471 manatees were detected, of which 46 (10%) were calves and 425 (90%) adults. Four different calves were identified. Mean density was 21.7 manatees per square kilometer, fluctuating between 3.7 and 43.3 manatees per square kilometer. Changes in manatee density were attributable to variations in water level, which allow or restrict manatee access to the different water bodies that make up the San Pedro River system. We estimated that 28 manatees were present in the study area. Manatee densities were surprisingly low. It is thus urgent to continue monitoring studies using SSS and obtain an updated estimation of manatee population size in the hydrological basins on the eastern coast of Mexico, which is considered to be the most important population in the country.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los sistemas fluviolagunares como el río San Pedro, tributario del río Usumacinta, son hábitats muy importantes para el manatí antillano. Estos sistemas se caracterizan por tener complejos cursos de agua con altos niveles de turbidez, que históricamente han dificultado el estudio de los manatíes en las cuencas hidrológicas de la costa oriental de México. Los objetivos de este estudio fueron estimar la densidad de manatíes en el sistema río San Pedro y saber cómo varía esta densidad con los cambios en el nivel del agua. El método para estimar la densidad se basó en el uso de un sonar de barrido lateral (SBL). Se realizaron 2 sesiones de navegación por mes, de enero a junio de 2016. Cada sesión consistió en 3 recorridos consecutivos sobre un transecto de 23 km de largo a una velocidad de 10 km/h. La detección de los manatíes se realizó con un SBL Humminbird. Se detectaron un total de 471 manatíes, de los cuales 46 (10%) correspondieron a crías y 425 (90%) a adultos. Cuatro crías distintas fueron identificadas. La densidad promedio fue de 21.7 manatíes por kilómetro cuadrado, con fluctuaciones de 3.7 a 43.3 manatíes por kilómetro cuadrado. Los cambios en la densidad de manatíes se atribuyen a las variaciones en el nivel del agua, que permiten o restringen el acceso de los manatíes a los distintos cuerpos de agua que componen el sistema del río San Pedro. Se estimó un total de 28 manatíes en el área de estudio. Los valores de densidad de manatíes fueron inesperadamente bajos. Por tanto, es urgente continuar con estos estudios usando el SBL para obtener una estimación actual del tamaño de la población de manatíes en las cuencas hidrológicas de la costa oriental de México, población considerada como la más importante en el país.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Antillean manatee]]></kwd>
<kwd lng="en"><![CDATA[population size]]></kwd>
<kwd lng="en"><![CDATA[density]]></kwd>
<kwd lng="en"><![CDATA[Usumacinta River]]></kwd>
<kwd lng="en"><![CDATA[side-scan sonar]]></kwd>
<kwd lng="es"><![CDATA[manatí antillano]]></kwd>
<kwd lng="es"><![CDATA[tamaño poblacional]]></kwd>
<kwd lng="es"><![CDATA[densidad]]></kwd>
<kwd lng="es"><![CDATA[río Usumacinta]]></kwd>
<kwd lng="es"><![CDATA[sonar de barrido lateral]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Álvarez-Flores]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Aguayo-Lobo]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Observaciones sobre el manatí Trichechus manatus en la región media del Usumacinta, Tabasco]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Chávez-Lomelí]]></surname>
<given-names><![CDATA[MO]]></given-names>
</name>
</person-group>
<source><![CDATA[Memorias del Simposio Ecología de los Ríos Usumacinta y Grijalva]]></source>
<year>1988</year>
<page-range>617-24</page-range><publisher-loc><![CDATA[Villahermosa, Tabasco, México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Investigación sobre Recursos Bióticos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arraut]]></surname>
<given-names><![CDATA[EM]]></given-names>
</name>
<name>
<surname><![CDATA[Marmontel]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mantovani]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Novo]]></surname>
<given-names><![CDATA[EMLM]]></given-names>
</name>
<name>
<surname><![CDATA[Macdonald]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
<name>
<surname><![CDATA[Kenward]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The lesser of two evils: seasonal migrations of Amazonian manatees in the Western Amazon]]></article-title>
<source><![CDATA[J. Zool.]]></source>
<year>2010</year>
<volume>280</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>247-56</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Auil]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<source><![CDATA[Abundance and distribution trends of the West Indian Manatee in the coastal zone of Belize: Implications for conservation]]></source>
<year>2004</year>
<page-range>83</page-range><publisher-loc><![CDATA[Texas, USA ]]></publisher-loc>
<publisher-name><![CDATA[Texas A&amp;M University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Auil-Gomez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Marine Mammals]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Auil-Gomez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<source><![CDATA[Coastal Zone Management Authority &amp; Institute (CZMAI). State of Belize Coastal Zone Report 2003-2013]]></source>
<year>2014</year>
<page-range>65-72</page-range><publisher-loc><![CDATA[Belize City ]]></publisher-loc>
<publisher-name><![CDATA[CZMAI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campbell]]></surname>
<given-names><![CDATA[HW]]></given-names>
</name>
<name>
<surname><![CDATA[Gicca]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reseña preliminar del estado actual y distribución del manatí (Trichechus manatus) en México]]></article-title>
<source><![CDATA[An. Inst. Biol. Univ. Nac. Auton. Mex. (Zool.)]]></source>
<year>1978</year>
<volume>49</volume>
<page-range>257-65</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castelblanco-Martínez]]></surname>
<given-names><![CDATA[DN]]></given-names>
</name>
<name>
<surname><![CDATA[Bermúdez-Romero]]></surname>
<given-names><![CDATA[AL]]></given-names>
</name>
<name>
<surname><![CDATA[Gómez-Camelo]]></surname>
<given-names><![CDATA[IV]]></given-names>
</name>
<name>
<surname><![CDATA[Weber-Rosas]]></surname>
<given-names><![CDATA[FC]]></given-names>
</name>
<name>
<surname><![CDATA[Trujillo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Zerda-Ordoñez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Seasonality of habitat use, mortality and reproduction of the vulnerable Antillean manatee Trichechus manatus manatus in the Orinoco River, Colombia: implications for conservation]]></article-title>
<source><![CDATA[Oryx]]></source>
<year>2009</year>
<volume>43</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>235-42</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castillo-Domínguez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Barba Macías]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Navarrete]]></surname>
<given-names><![CDATA[A de J]]></given-names>
</name>
<name>
<surname><![CDATA[Rodiles-Hernández]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez Badillo]]></surname>
<given-names><![CDATA[M de L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ictiofauna de los humedales del río San Pedro, Balancán, Tabasco, México]]></article-title>
<source><![CDATA[Rev. Biol. Trop.]]></source>
<year>2011</year>
<volume>59</volume>
<page-range>693-708</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Colmenero-Rolón]]></surname>
<given-names><![CDATA[LC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nuevos registros del manatí (Trichechus manatus) en el sureste de México]]></article-title>
<source><![CDATA[An. Inst. Biol. Univ. Nac. Aut. Mex. (Zool.)]]></source>
<year>1984</year>
<volume>1</volume>
<page-range>243-54</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Colmenero-Rolón]]></surname>
<given-names><![CDATA[LC]]></given-names>
</name>
<name>
<surname><![CDATA[Hoz-Zavala]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribución de los manatíes, situación y su conservación en México]]></article-title>
<source><![CDATA[An. Inst. Biol. Univ. Nac. Aut. Mex. (Zool.)]]></source>
<year>1986</year>
<volume>3</volume>
<page-range>955-1020</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deutsch]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Self-Sullivan]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mignucci-Giannoni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Trichechus manatus. The IUCN Red List of Threatened Species 2008]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Di Rienzo]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Casanoves]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Balzarini]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Tablada]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Robledo]]></surname>
<given-names><![CDATA[CW]]></given-names>
</name>
</person-group>
<source><![CDATA[Grupo InfoStat [statistical software]]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Argentina ]]></publisher-loc>
<publisher-name><![CDATA[FCA, Universidad Nacional de Córdoba]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Efron]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bootstrap methods: Another look at the Jackknife]]></article-title>
<source><![CDATA[Ann. Stat.]]></source>
<year>1979</year>
<volume>7</volume>
<page-range>1-29</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gannon]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Scolardi]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
<name>
<surname><![CDATA[3rd]]></surname>
<given-names><![CDATA[Reynolds JE]]></given-names>
</name>
<name>
<surname><![CDATA[Koelsch]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
<name>
<surname><![CDATA[Kessenich]]></surname>
<given-names><![CDATA[TJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Habitat selection by manatees in Sarasota Bay, Florida]]></article-title>
<source><![CDATA[Mar Mamm. Sci.]]></source>
<year>2007</year>
<volume>23</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>133-43</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gaumer]]></surname>
<given-names><![CDATA[GF]]></given-names>
</name>
</person-group>
<source><![CDATA[Monografía de los mamíferos de Yucatán]]></source>
<year>1917</year>
<page-range>331</page-range><publisher-loc><![CDATA[Mexico ]]></publisher-loc>
<publisher-name><![CDATA[Departamento de Talleres Gráficos de la Secretaría de Fomento]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Socoloske]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<source><![CDATA[Aspects of the feeding ecology of the Antillean manatee (Trichechus manatus manatus) in the wetlands of Tabasco, Mexico]]></source>
<year>2013</year>
<page-range>188</page-range><publisher-loc><![CDATA[Durham, NC, USA ]]></publisher-loc>
<publisher-name><![CDATA[Duke University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Socoloske]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gentle giants in dark waters: using side-scan sonar for manatee research]]></article-title>
<source><![CDATA[Open Remote Sens. J.]]></source>
<year>2012</year>
<volume>5</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-14</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Socoloske]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of free-ranging West Indian manatees Trichechus manatus using side-scan sonar]]></article-title>
<source><![CDATA[Endang. Species Res.]]></source>
<year>2009</year>
<volume>8</volume>
<page-range>249-57</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Good]]></surname>
<given-names><![CDATA[PI]]></given-names>
</name>
</person-group>
<source><![CDATA[Resampling Methods: A Practical Guide to Data Analysis]]></source>
<year>2006</year>
<edition>3rd</edition>
<page-range>218</page-range><publisher-loc><![CDATA[Boston, MA ]]></publisher-loc>
<publisher-name><![CDATA[Birkhauser]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzmán-Nieto]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
</person-group>
<source><![CDATA[Conocimiento y Apreciación del Manatí y su Relación con la Calidad del Hábitat en la Cuenca del Río Usumacinta]]></source>
<year>2008</year>
<page-range>68</page-range><publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hartman]]></surname>
<given-names><![CDATA[DS]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecology and Behavior of the Manatee (Trichechus manatus) in Florida]]></source>
<year>1979</year>
<page-range>151</page-range><publisher-loc><![CDATA[New York, NY ]]></publisher-loc>
<publisher-name><![CDATA[American Society of Mammalogists]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jaramillo-Villa]]></surname>
<given-names><![CDATA[Ú]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El pulso de inundación. Los latidos del agua]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Jaramillo-Villa]]></surname>
<given-names><![CDATA[Ú]]></given-names>
</name>
<name>
<surname><![CDATA[Cortez-Duque]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Flórez-Ayala]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<source><![CDATA[Colombia Anfibia: Un País de Humedales]]></source>
<year>2015</year>
<page-range>30-1</page-range><publisher-loc><![CDATA[Bogotá, Colombia ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Investigación de Recursos Biológicos Alexander von Humboldt]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heavy poaching in prime habitat: the conservation status of the West Indian manatee in Nicaragua]]></article-title>
<source><![CDATA[Oryx]]></source>
<year>2002</year>
<volume>36</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>272-8</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Domínguez]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Características del hábitat del manatí antillano (Trichechus manatus manatus) en sistemas fluviolagunares del sur del Golfo de México]]></article-title>
<source><![CDATA[Therya]]></source>
<year>2014</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>601-14</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los intocables del río San Pedro]]></article-title>
<source><![CDATA[Ecofronteras]]></source>
<year>2016</year>
<volume>20</volume>
<numero>56</numero>
<issue>56</issue>
<page-range>22-5</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribución espacial y estimación poblacional de los manatíes en la Bahía de Chetumal, Quintana Roo, México]]></article-title>
<source><![CDATA[Rev. Inv. Cient.]]></source>
<year>1994</year>
<page-range>27-52</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribución del manatí (Trichechus manatus) en la costa norte y centro -norte del estado de Quintana Roo]]></article-title>
<source><![CDATA[An. Inst. Biol. Univ. Nac. Aut. Méx., Ser. Zool.]]></source>
<year>1997</year>
<volume>68</volume>
<page-range>153-64</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera-Gómez]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Reynolds III]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Rathbun]]></surname>
<given-names><![CDATA[GB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribution and habitat use by manatees (Trichechus manatus manatus) in Belize and Chetumal Bay, Mexico]]></article-title>
<source><![CDATA[Biol. Conserv.]]></source>
<year>2000</year>
<volume>95</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>67-75</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Padilla-Saldivar]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Mignucci-Giannoni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Status of the manatee (Trichechus manatus) along the northern and western coasts of the Yucatan Peninsula, México]]></article-title>
<source><![CDATA[Caribb. J. Sci.]]></source>
<year>2003</year>
<volume>39</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>42-9</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[O&#8217;Shea]]></surname>
<given-names><![CDATA[TJ]]></given-names>
</name>
<name>
<surname><![CDATA[Salisbury]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Belize-a last stronghold for manatees in the Caribbean]]></article-title>
<source><![CDATA[Oryx]]></source>
<year>1991</year>
<volume>25</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>156-64</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Powell]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<source><![CDATA[The distribution and biology of the West African manatee (Trichechus senegalensis Link 1795)]]></source>
<year>1996</year>
<page-range>68</page-range><publisher-loc><![CDATA[Nairobi, Kenya ]]></publisher-loc>
<publisher-name><![CDATA[United Nations Environmental Program]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Puc-Carrasco]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Olivera -Gómez]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Ariaga-Hernández]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez-Domínguez]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abundancia relativa del manatí antillano en la Reserva de la Biósfera Pantanos de Centla en la planicie costera de Tabasco, México = Relative abundance of Antillean manatees in the Pantanos de Centla Biosphere Reserve in the coastal plain of Tabasco, Mexico]]></article-title>
<source><![CDATA[Cienc. Mar.]]></source>
<year>2016</year>
<volume>42</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>261-70</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[JE 3rd]]></given-names>
</name>
<name>
<surname><![CDATA[Morales-Vela]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Lawler]]></surname>
<given-names><![CDATA[IR]]></given-names>
</name>
<name>
<surname><![CDATA[Edwards]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Utility and design of aerial surveys for sirenians]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Hines]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[JE 3rd]]></given-names>
</name>
<name>
<surname><![CDATA[Aragones]]></surname>
<given-names><![CDATA[LV]]></given-names>
</name>
<name>
<surname><![CDATA[Mignucci-Giannoni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Marmontel]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Sirenian Conservation: Issues and Strategies in Developing Countries]]></source>
<year>2012</year>
<page-range>186-95</page-range><publisher-loc><![CDATA[Gainesville, FL ]]></publisher-loc>
<publisher-name><![CDATA[University Press of Florida]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rivas-Rodríguez]]></surname>
<given-names><![CDATA[BA]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrer-Pérez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Colonnello]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribución, uso de hábitat y status poblacional del manatí (Trichechus manatus) en el tramo central del bajo]]></article-title>
<source><![CDATA[Mem. Fund. La Salle Cienc. Nat.]]></source>
<year>2012</year>
<volume>173</volume>
<page-range>155-72</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodas-Trejo]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Romero-Berny]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Estrada]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Distribution and conservation of the West Indian manatee (Trichechus manatus manatus) in the Catazajá wetlands of northeast Chiapas, Mexico]]></article-title>
<source><![CDATA[Trop. Conserv. Sci.]]></source>
<year>2008</year>
<volume>1</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>321-33</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Romero-Berny]]></surname>
<given-names><![CDATA[EI]]></given-names>
</name>
<name>
<surname><![CDATA[Rodas-Trejo]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Méndez-López]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Registro de muertes y varamientos de manatíes del Caribe (Trichechus manatus), periodo 2001-2010, en el sistema lagunar de Catazajá, Chiapas]]></article-title>
<source><![CDATA[Lacandonia]]></source>
<year>2014</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>105-11</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Self-Sullivan]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mignucci-Giannoni]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Trichechus manatus ssp. Manatus. The IUCN red list of threatened species 2008: T22105A9359161]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<collab>SEMARNAT</collab>
<collab>CONANP</collab>
<source><![CDATA[Programa de Acción para la Conservación de la Especie: Manatí (Trichechus manatus manatus)]]></source>
<year>2010</year>
<page-range>50</page-range><publisher-loc><![CDATA[Mexico City, Mexico ]]></publisher-loc>
<publisher-name><![CDATA[SEMARNAT]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Siegel]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Castellan]]></surname>
<given-names><![CDATA[NJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Estadística No Paramétrica: Aplicada a las ciencias de la conducta]]></source>
<year>1995</year>
<edition>4th</edition>
<page-range>437</page-range><publisher-loc><![CDATA[Mexico City, Mexico ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Trillas]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="book">
<collab>[UNEP] United Nations Environment Programme</collab>
<source><![CDATA[Regional management plan for the West Indian manatee (Trichechus manatus) compiled by Ester Quintana-Rizzo and John Reynolds III]]></source>
<year>2010</year>
<numero>48</numero>
<issue>48</issue>
<page-range>169</page-range><publisher-loc><![CDATA[Kingston, Jamaica ]]></publisher-loc>
<publisher-name><![CDATA[UNEP Caribbean Environment Programme]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[West]]></surname>
<given-names><![CDATA[RC]]></given-names>
</name>
<name>
<surname><![CDATA[Psuty]]></surname>
<given-names><![CDATA[NP]]></given-names>
</name>
<name>
<surname><![CDATA[Thom]]></surname>
<given-names><![CDATA[BG]]></given-names>
</name>
</person-group>
<source><![CDATA[Las tierras bajas de Tabasco en el Sureste de México]]></source>
<year>1985</year>
<page-range>199</page-range><publisher-loc><![CDATA[Tabasco, Mexico ]]></publisher-loc>
<publisher-name><![CDATA[Gobierno del Estado de Tabasco]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
