<?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>2007-3364</journal-id>
<journal-title><![CDATA[Therya]]></journal-title>
<abbrev-journal-title><![CDATA[Therya]]></abbrev-journal-title>
<issn>2007-3364</issn>
<publisher>
<publisher-name><![CDATA[Asociación Mexicana de Mastozoología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33642015000200315</article-id>
<article-id pub-id-type="doi">10.12933/therya-15-274</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Abundancia relativa y estacionalidad de dos poblaciones de toninas ( Tursiops truncatus) en la región de Guaymas, Sonora, Golfo de California]]></article-title>
<article-title xml:lang="en"><![CDATA[Relative abundance and seasonality of two populations of Bottlenose dolphins (Tursiops truncatus) in the Guaymas, Sonora region, Gulf of California]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guevara-Aguirre]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallo-Reynoso]]></surname>
<given-names><![CDATA[Juan Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Posgrado de Ciencias del Mar y Limnología ]]></institution>
<addr-line><![CDATA[Distrito federal ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación en Alimentación y Desarrollo Guaymas Laboratorio de Ecofisiología]]></institution>
<addr-line><![CDATA[ Sonora]]></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>6</volume>
<numero>2</numero>
<fpage>315</fpage>
<lpage>328</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33642015000200315&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33642015000200315&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33642015000200315&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:  INTRODUCCIÓN: El estudio de la ecología de las toninas (Tursiops truncatus) del Golfo de California se ha basado principalmente en la distribución y abundancia del ecotipo costero. No existen estudios comparativos sobre la ecología de los ecotipos costero y oceánico de la costa central de Sonora. El presente estudio pretende determinar la estacionalidad y la abundancia relativa de las manadas de los dos ecotipos de toninas que habitan en la Cuenca de Guaymas, en el Golfo de California.  METODOS: Se realizaron 13 salidas a la zona costera y 16 a la zona oceánica, y se utilizó un índice de abundancia relativa estacional.  RESULTADOS: En el caso del ecotipo costero, la estación con mayor abundancia fue la primavera (18.52 toninas/hora), y para el ecotipo oceánico fue el invierno (51.43 toninas/hora). Usando la estadística de prueba de la razón de verosimilitud, el análisis estacional por ecotipo determinó que no existen diferencias significativas en el conteo esperado de manadas para cada estación en ambos ecotipos; en cambio, el conteo de individuos será diferente para cada estación (Costeras: manadas: D = 4.92 (P = 0.1781); individuos: D = 61.50 (P &lt;0.001)), (Oceánicas: manadas D = 7.78 (P = 0.0501); individuos: D = 547.42 (P &lt;0.001)).  DISCUSIÓN Y CONCLUSIONES: Al comparar estacionalmente a ambos ecotipos en el número de manadas y en el número de toninas observadas durante la primavera, encontramos que esta se comportó de manera diferente a las otras tres estaciones climáticas; presentó más manadas oceánicas que costeras y el mismo número de individuos en toninas costeras y en toninas oceánicas. Las otras estaciones (verano, otoño e invierno) presentaron más manadas en costeras que en oceánicas y menor número de individuos en toninas costeras que en toninas oceánicas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:  INTRODUCTION: The study of the ecology of the bottlenose dolphins (Tursiops truncatus) in the Gulf of California has been based on the distribution and abundance of the coastal ecotype; therefore there are no comparative studies of the ecology and seasonality of coastal and oceanic ecotypes in the central coast of Sonora. The aim of this study is to determine if seasonal changes have an effect on the relative abundance of the number of herds and the number of individuals of the two ecotypes (coastal and ocean) that inhabit the Guaymas Basin in the Gulf of California.  METHODS: 13 trips to the coast and 16 to the ocean area where the number of herds and individuals were registered during one year to determine their seasonality. Seasonal relative abundance was obtained by the number of dolphins/hour, and the number of herds/hour. To determine the seasonality of dolphins, first we obtained the seasonal abundance by dividing the number of herds and the number of individuals, and second we made a hypothesis tests, with the number of herds and number of individuals and obtained a likelihood ratio for each ecotype.  RESULTS: The greater abundance of coastal dolphins was during spring (18.52 dolphins/hour) and for the oceanic ones it was in winter (51.43 dolphins/hour; Tables 1 and 3). The seasonal analysis determined that the expected herd counts could be similar while the individuals count will be different for each season (Coastal: herds D = 4.92 (P = 0.1781); individuals D = 61.50 (P &lt; 0.001); and for Oceanic: herds D = 7.78 (P = 0.0501); individuals D = 547.42 (P &lt;0.001; Tables 2 and 4). Seasonally coastal dolphins present a greater number of herds and fewer individuals than the oceanic dolphins with the exception of spring season in both cases (Tables 5 and 6).  DISCUSSION AND CONCLUSIONS: Areas of high primary productivity are of great importance to marine mammals and due to that, their distribution and overall relative abundance obtained for coastal dolphins/hour is one of the highest that we have found reported for other coastal regions (Baumgartner et al. 2001; Bazúa and Delgado 2014). These results agree with the characteristics of both ecotypes of dolphins, the oceanic dolphins presenting larger groups; and the coastal dolphins having a larger number of herds, except in spring, this is probably due to the movement of the oceanic dolphin's prey towards the continental shelf.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Abundancia relativa]]></kwd>
<kwd lng="es"><![CDATA[ecotipos]]></kwd>
<kwd lng="es"><![CDATA[estacionalidad]]></kwd>
<kwd lng="es"><![CDATA[toninas]]></kwd>
<kwd lng="en"><![CDATA[Bottlenose dolphins]]></kwd>
<kwd lng="en"><![CDATA[ecotypes]]></kwd>
<kwd lng="en"><![CDATA[relative abundance]]></kwd>
<kwd lng="en"><![CDATA[seasonality]]></kwd>
</kwd-group>
</article-meta>
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<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
