<?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>0123-3475</journal-id>
<journal-title><![CDATA[Revista Colombiana de Biotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. biotecnol]]></abbrev-journal-title>
<issn>0123-3475</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Biotecnología, Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-34752019000200055</article-id>
<article-id pub-id-type="doi">10.15446/rev.colomb.biote.v21n2.77847</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Criopreservación de semen de bagre rayado Pseudoplatystoma magdaleniatum con tres diferentes crioprotectores]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of three cryoprotectants to preserve striped catfish (Pseudoplatystoma magdaleniatum) semen]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Cruz]]></surname>
<given-names><![CDATA[Edwin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aristizabal-Regino]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yepes-Blandón]]></surname>
<given-names><![CDATA[Jonny]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Posada]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Araujo]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Atencio-Garcia]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Estación Piscícola San Silvestre SA  ]]></institution>
<addr-line><![CDATA[Barrancabermeja ]]></addr-line>
<country>Col</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Estación Piscícola San Silvestre SA  ]]></institution>
<addr-line><![CDATA[Barrancabermeja ]]></addr-line>
<country>Col</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Estación Piscícola San Silvestre SA  ]]></institution>
<addr-line><![CDATA[Barrancabermeja ]]></addr-line>
<country>Col</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,ISAGEN S.A  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Córdoba  ]]></institution>
<addr-line><![CDATA[Montería ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad de Córdoba  ]]></institution>
<addr-line><![CDATA[Montería ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>21</volume>
<numero>2</numero>
<fpage>55</fpage>
<lpage>62</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-34752019000200055&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-34752019000200055&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-34752019000200055&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo fue criopreservar semen de bagre rayado Pseudoplatystoma magdaleniatum con tres crioprotectores internos diferentes: dimetilsulfóxido (DMSO), dimetilacetamida (DMA) y etilenglicol (ETG) a dos porcentajes de inclusiones (5 y 10%), combinados con glucosa 6%, leche en polvo descremada 3% y vitamina E (0,4%). Cinco machos en fase de espermiación fueron inducidos con 0,4 ml de Ovaprim®/Kg. El semen fue diluido en la solución crioprotectora (1:3) en tubos de 2,5 ml, congelado en vapores de nitrógeno y descongelado a 35°C durante 90 segundos. El análisis estadístico incluyó un diseño factorial 3x2 y semen fresco (SF) como tratamiento testigo. En semen fresco, precongelado y descongelado se evaluó la movilidad total (Mt), tipos de movilidad, progresividad total y velocidades espermáticas con la ayuda de Sperm Class Analyzer SCA®. El SF registró volumen de 6,1±4,3 ml, Mt de 72,6±17,1%, activación de 31,2±2,1 segundos y concentración espermática de 54,7±22,9 millones/&#956;l. En semen precongelado, el crioprotector (p&lt;0,05) y porcentaje de inclusión (p&lt;0,01), pero no su interacción, tuvieron un efecto significativo en la Mt, velocidad curvilínea (VCL) y velocidad lineal (VSL); mientras que en semen descongelado sólo la interacción de los factores (p&lt;0,05) fue significativa en Mt, porcentajes de espermatozoide estáticos y VCL. La Mt cayó entre 36-67% en semen precongelado y entre 7486% en semen descongelado con relación a SF. Los resultados sugieren que DMSO, DMA y ETG incluidos a 5 o 10%, combinados con leche en polvo 3%, glucosa 6% y vitamina E 0,4% son alternativas viables de criopreservación del semen de bagre rayado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The objective of this study was to evaluate three internal cryoprotectants to preserve semen of striped catfish (Pseudoplatystoma magdaleniatum). The cryoprotectants tested were: dimethylsulfoxide (DMSO), dimethylacetamide (DMA) and ethylene glycol (ETG) at two inclusion percentages (5 and 10%), mixed with 6% glucose, 3% skim milk powder, and 0.4% vitamin E. Five males in the spermiation phase were induced with Ovaprim® (0.4 ml/kg). The semen was diluted in the cryoprotective solution (1: 3) in 2.5 ml tubes, frozen in nitrogen vapors and thawed at 35°C for 90 seconds. A 3x2 factorial design was used, and the control treatment was fresh semen (SF). Total motility (Mt), type of motility total progressivity, and spermatic velocities were evaluated in fresh, pre-frozen and post-thawed semen using the Sperm Class Analyzer (SCA®) software. The SF volume was 6.1 ± 4.3 ml, with Mt of 72.6 ± 17.1%, activation of 31.2 ± 2.1 seconds and sperm concentration of 54.7 ± 22.9 million/&#956;l. In the pre-frozen semen, the cryoprotectant (p &lt;0.05) and the percentage of inclusion (p &lt;0.01) -but not their interaction- had a significant negative effect on Mt, curvilinear velocity (VCL), and linear velocity (VSL); whereas in thawed semen only the interaction of the factors (p &lt;0.05) was significant for Mt, static sperm percentages and VCL. The Mt decreased between 36-67% in pre-frozen semen and between 74-86% in thawed semen compared to SF. These results suggest that 5 or 10% inclusion levels of DMSO, DMA, and ETG, in combination with 3% powdered milk, 6% glucose, and 0.4% vitamin E are viable alternatives to cryopreserve semen of striped catfish.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[semen congelado]]></kwd>
<kwd lng="es"><![CDATA[preservación del semen]]></kwd>
<kwd lng="es"><![CDATA[piscicultura]]></kwd>
<kwd lng="es"><![CDATA[reproducción]]></kwd>
<kwd lng="es"><![CDATA[siluriformes]]></kwd>
<kwd lng="en"><![CDATA[frozen semen]]></kwd>
<kwd lng="en"><![CDATA[semen preservation]]></kwd>
<kwd lng="en"><![CDATA[fish farming]]></kwd>
<kwd lng="en"><![CDATA[reproduction]]></kwd>
<kwd lng="en"><![CDATA[Siluriforms]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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