<?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>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562024000100104</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v26i1.2103</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Ruminal degradation synchrony of crude protein and organic matter of forage species, as a preference determinant in free-range goats in the Sonoran Desert of Baja California Sur]]></article-title>
<article-title xml:lang="es"><![CDATA[Sincronía de la degradación ruminal de proteína cruda y materia orgánica de especies forrajeras como determinante de preferencia en cabras de libre pastoreo en el desierto sonorense de Baja California Sur]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Orduña]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Armenta-Quintana]]></surname>
<given-names><![CDATA[José Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Orduña]]></surname>
<given-names><![CDATA[Juan Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Avalos-Castro]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Baja California Sur Departamento de Ciencia Animal y Conservación del hábitat ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>26</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562024000100104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562024000100104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562024000100104&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of the study was to evaluate the relationship between the preference index (IP) and synchrony (IS) of forage species from Baja California Sur. Samples of the 23 forage species of trees and shrubs were obtained to perform in situ digestibility analyzes using four Creole-Nubian goats. Collections were carried out in winter and spring of 2004, and summer and autumn of 2005. The extent of degradation per hour and total of 24 h was calculated from the amount of OM and PC degraded per hour; these data were used to calculate the IS. The seasonal PI data set was obtained from previously published information. A logistic regression model was used to explain the probability of occurrence of the IP with the IS. The regression model to explain the IP from the IS was significant and predictive for six species, being positive for Adelia virgata, Amaratus palmeri, Haematoxilon brasiletto, Lippia palmeri and Prosopis sp., and negative for Bursera microphyla. For other tree species and legumes in general, the model was significant, but not predictive, therefore, it is necessary to include other factors to fit the model.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio fue evaluar la relación existente entre el índice de preferencia (IP) y sincronía (IS) de especies forrajeras de Baja California Sur. Se obtuvieron muestras de las 23 especies forrajeras de árboles y arbustos para realizar análisis de digestibilidad in situ utilizando para ello cuatro cabras con encaste de criollas-Nubio. Se llevaron a cabo colecciones en invierno y primavera del 2004 y verano y otoño de 2005. La extensión de degradación por hora y total de 24 h se calculó a partir de la cantidad de MO y PC degradados por hora; estos datos se utilizaron para calcular el IS. El conjunto de datos del IP estacional se obtuvo de información publicada previamente. Se utilizó un modelo de regresión logística para explicar la probabilidad de ocurrencia del IP con el IS. El modelo de regresión para explicar el IP a partir del IS fue significativo y predictivo para seis especies, siendo positiva para Adelia virgata, Amaratus palmeri, Haematoxilon brasiletto, Lippia palmeri y Prosopis sp., y negativa para Bursera microphyla. Para otras especies arbóreas y las leguminosas en general, el modelo fue significativo, pero no predictivo, por lo tanto, es necesaria incluir otros factores para ajustar el modelo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[range goats]]></kwd>
<kwd lng="en"><![CDATA[arid zones]]></kwd>
<kwd lng="en"><![CDATA[synchrony index]]></kwd>
<kwd lng="en"><![CDATA[preference index]]></kwd>
<kwd lng="en"><![CDATA[forage intake]]></kwd>
<kwd lng="es"><![CDATA[cabras de agostadero]]></kwd>
<kwd lng="es"><![CDATA[zonas aridas]]></kwd>
<kwd lng="es"><![CDATA[índice de sincronización]]></kwd>
<kwd lng="es"><![CDATA[índice de preferencia]]></kwd>
<kwd lng="es"><![CDATA[consumo de forraje]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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