<?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>0123-4226</journal-id>
<journal-title><![CDATA[Revista U.D.C.A Actualidad & Divulgación Científica]]></journal-title>
<abbrev-journal-title><![CDATA[rev.udcaactual.divulg.cient.]]></abbrev-journal-title>
<issn>0123-4226</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Aplicadas y Ambientales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-42262022000100011</article-id>
<article-id pub-id-type="doi">10.31910/rudca.v25.n1.2022.1464</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reproductive and fertility parameters of ewes from the Colombian tropical highlands]]></article-title>
<article-title xml:lang="es"><![CDATA[Parámetros reproductivos y de fertilidad de ovejas en el trópico alto de Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[Félix]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos]]></surname>
<given-names><![CDATA[Romulo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Rio Grande do Sul Faculty of Veterinary ]]></institution>
<addr-line><![CDATA[Porto Alegre ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,National University of Colombia Campus Palmira Animal Science Department]]></institution>
<addr-line><![CDATA[Palmira Valle del Cauca]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>25</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-42262022000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-42262022000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-42262022000100011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Two studies were conducted on sheep in the high tropics of Colombia to study reproductive and fertility parameters associated with animal growth in this ecological zone. In the first trial, 1,389 records were used to analyze, through descriptive statistics, the fertility parameters, the birth rate, and the yield per multiple births of three genetic groups of sheep: the native Criolla and Manchada Paramuna breeds, and they were compared with the imported race Blackface. In the second study, the duration of the estrous cycle was determined and serum progesterone values were determined during the estrous cycle in 19 Criolla x Romney Marsh crossbred ewes, in this experiment, five moments of the cycle were analyzed. The fertility rates found in the Criolla and Manchada Paramuna breeds were 73.1 and 72 %, respectively, and were higher than those of the Blackface sheep (65 %). Blackface ewes showed the highest incidence of multiple births (29 %) and Manchada Paramuna ewes had the highest birth rates (93.7 %). Criolla x Romney Marsh crossbred ewes recorded a mean duration of the estrous cycle of 17.8 d. The highest progesterone secretion (11.5 nmol/L) occurred on day 9 of the estrous cycle, while in the estrus phases, its value was 0.32 nmol/L. This study contributes to the knowledge of the reproductive aspects of Colombian native sheep.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se realizaron dos estudios en ovejas en el trópico alto de Colombia, para estudiar los parámetros reproductivos y de fertilidad asociados con el crecimiento animal, en esta zona ecológica. En el primer ensayo, se utilizaron 1.389 registros para analizar, a través de estadísticas descriptivas, los parámetros de fertilidad, la tasa de natalidad y el rendimiento por parto múltiple, de tres grupos genéticos de ovejas: las razas nativas Criolla y Manchada Paramuna y se compararon con la raza importada Blackface. En el segundo estudio, se determinó la duración del ciclo estral y se determinaron valores de progesterona sérica durante el ciclo estral, en 19 ovejas cruzadas Criolla x Romney Marsh; en este experimento, se analizaron cinco momentos del ciclo. Las tasas de fertilidad encontradas en las razas Criolla y Manchada Paramuna fue de 73,1 y 72 %, respectivamente, superior a la de las ovejas Blackface (65 %). Las ovejas Blackface mostraron la mayor incidencia de partos múltiples (29 %) y las ovejas Manchada Paramuna tuvieron las tasas de parto más altas (93,7 %). Las ovejas cruzadas Criolla x Romney Marsh registraron una duración media del ciclo estral de 17,8 d. La mayor secreción de progesterona (11,5 nmol/L) ocurrió el día 9 del ciclo estral, mientras que en las fases del estro, su valor fue de 0,32 nmol/L. Este estudio contribuye con el conocimiento de los aspectos reproductivos de las ovejas nativas colombianas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Estrous cycle]]></kwd>
<kwd lng="en"><![CDATA[Ovine]]></kwd>
<kwd lng="en"><![CDATA[Native breeds]]></kwd>
<kwd lng="en"><![CDATA[Progesterone]]></kwd>
<kwd lng="en"><![CDATA[Reproductive performance]]></kwd>
<kwd lng="es"><![CDATA[Ciclo estral]]></kwd>
<kwd lng="es"><![CDATA[Ovinos]]></kwd>
<kwd lng="es"><![CDATA[Progesterona]]></kwd>
<kwd lng="es"><![CDATA[Razas nativas]]></kwd>
<kwd lng="es"><![CDATA[Rendimiento reproductivo]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[AKÉ-VILLANUEVA]]></surname>
<given-names><![CDATA[J.R.]]></given-names>
</name>
<name>
<surname><![CDATA[AKÉ-LÓPEZ]]></surname>
<given-names><![CDATA[J.R.]]></given-names>
</name>
<name>
<surname><![CDATA[MAGAÑA-MONFORTE]]></surname>
<given-names><![CDATA[J.G.]]></given-names>
</name>
<name>
<surname><![CDATA[SEGURA-CORREA]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive behavior in hair sheep rams under tropical conditions]]></article-title>
<source><![CDATA[Tropical animal health and production]]></source>
<year>2019</year>
<volume>51</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1627-35</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ALDERSON]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[NARANJO]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[KRESS]]></surname>
<given-names><![CDATA[D.D.]]></given-names>
</name>
<name>
<surname><![CDATA[BURFENING]]></surname>
<given-names><![CDATA[P.J.]]></given-names>
</name>
<name>
<surname><![CDATA[BLACKWELL]]></surname>
<given-names><![CDATA[R.L.]]></given-names>
</name>
<name>
<surname><![CDATA[BRADFORD]]></surname>
<given-names><![CDATA[G.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Comportamiento comparativo de las razas ovinas Rambouillet, Corriedale, Romney Marsh y Criolla en Colombia]]></source>
<year>1988</year>
<page-range>9-32</page-range><publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Producción Ovina en Colombia, Instituto Colombiano Agropecuario]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>3.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[AMARAL]]></surname>
<given-names><![CDATA[R. DE S.]]></given-names>
</name>
<name>
<surname><![CDATA[FERREIRA]]></surname>
<given-names><![CDATA[M.F.]]></given-names>
</name>
<name>
<surname><![CDATA[NUNES]]></surname>
<given-names><![CDATA[B.L.]]></given-names>
</name>
<name>
<surname><![CDATA[GOMES]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
<name>
<surname><![CDATA[MELO]]></surname>
<given-names><![CDATA[A.N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Monitoring of progesterone and estrone fecal metabolites throughout gestation in ewes]]></article-title>
<source><![CDATA[Ciência Animal Brasileira Medicina Veterinaria]]></source>
<year>2019</year>
<volume>20</volume>
<page-range>1-10</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ARROYO-LEDEZMA]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[DE LA TORRE-BARRERA]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[ÁVILA-SERRANO]]></surname>
<given-names><![CDATA[N.Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Respuesta reproductiva de ovejas de pelo sincronizadas con progesterona o prostaglandinas]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2013</year>
<volume>47</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>661-70</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[BALARO]]></surname>
<given-names><![CDATA[M.F.A.]]></given-names>
</name>
<name>
<surname><![CDATA[BRANDÃO]]></surname>
<given-names><![CDATA[F.Z.]]></given-names>
</name>
<name>
<surname><![CDATA[PENEIRAS]]></surname>
<given-names><![CDATA[A.B.V.]]></given-names>
</name>
<name>
<surname><![CDATA[OBA]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[DA FONSECA]]></surname>
<given-names><![CDATA[J.F.]]></given-names>
</name>
<name>
<surname><![CDATA[ALMOSNY]]></surname>
<given-names><![CDATA[N.R.P.]]></given-names>
</name>
<name>
<surname><![CDATA[DA CRUZ CARDOSO]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproductive performance, metabolic and hormonal profiles of Santa Inês ewes in winter and summer under tropical conditions]]></article-title>
<source><![CDATA[Tropical Animal Health and Production]]></source>
<year>2015</year>
<volume>47</volume>
<page-range>627-31</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[BASS]]></surname>
<given-names><![CDATA[C.S.]]></given-names>
</name>
<name>
<surname><![CDATA[REDMER]]></surname>
<given-names><![CDATA[D.A.]]></given-names>
</name>
<name>
<surname><![CDATA[KAMINSKI]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
<name>
<surname><![CDATA[GRAZUL-BILSKA]]></surname>
<given-names><![CDATA[A.T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Luteal function during the estrous cycle in arginine-treated ewes fed different planes of nutrition]]></article-title>
<source><![CDATA[Reproduction]]></source>
<year>2017</year>
<volume>153</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>253-65</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7.</label><nlm-citation citation-type="book">
<collab>CAJA AGRARIA</collab>
<source><![CDATA[La Caja Agraria ante el sector rural colombiano]]></source>
<year>1986</year>
<publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Ministerio de Agricultura]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[COELHO]]></surname>
<given-names><![CDATA[L.A.]]></given-names>
</name>
<name>
<surname><![CDATA[RODRIGUES]]></surname>
<given-names><![CDATA[P.A.]]></given-names>
</name>
<name>
<surname><![CDATA[NONAKA]]></surname>
<given-names><![CDATA[K.O.]]></given-names>
</name>
<name>
<surname><![CDATA[SASA]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[BALIEIRO]]></surname>
<given-names><![CDATA[J.C.C.]]></given-names>
</name>
<name>
<surname><![CDATA[VICENTE]]></surname>
<given-names><![CDATA[W.R.R.]]></given-names>
</name>
<name>
<surname><![CDATA[CIPOLLA&#8208;NETO]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Annual pattern of plasma melatonin and progesterone concentrations in hair and wool ewe lambs kept under natural photoperiod at lower latitudes in the southern hemisphere]]></article-title>
<source><![CDATA[Journal of pineal research]]></source>
<year>2006</year>
<volume>41</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>101-7</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CONDE SILVA]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[RIVERA RINCÓN]]></surname>
<given-names><![CDATA[W.E.]]></given-names>
</name>
<name>
<surname><![CDATA[BÁEZ SANDOVAL]]></surname>
<given-names><![CDATA[G.M.]]></given-names>
</name>
<name>
<surname><![CDATA[GRAJALES LOMBANA]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación de la calidad espermática bajo un sistema computarizado de análisis seminal en ovinos criollos, Romney Marsh y Hampshire en condiciones de trópico alto. IV semana internacional y xii semana de ciencia tecnología e innovación]]></source>
<year>2017</year>
<page-range>146-51</page-range><publisher-name><![CDATA[Universidad Francisco Paula Santander]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<label>10.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CORREA C.]]></surname>
<given-names><![CDATA[H.J.]]></given-names>
</name>
<name>
<surname><![CDATA[CARULLA F.]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
<name>
<surname><![CDATA[PABÓN R.]]></surname>
<given-names><![CDATA[M.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Valor nutricional del pasto kikuyo (Pennisetum clandestinum Hoechst Ex Chiov.) para la producción de leche en Colombia (Una revisión): I Composición química y digestibilidad ruminal y posruminal]]></article-title>
<source><![CDATA[Livestock Research for Rural Development]]></source>
<year>2008</year>
<volume>20</volume>
<numero>4</numero>
<issue>4</issue>
</nlm-citation>
</ref>
<ref id="B11">
<label>11.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CUÉLLAR-GAMBOA]]></surname>
<given-names><![CDATA[G.A]]></given-names>
</name>
<name>
<surname><![CDATA[JIMÉNEZ-ROBAYO]]></surname>
<given-names><![CDATA[L.M.]]></given-names>
</name>
<name>
<surname><![CDATA[GRAJALES-LOMBANA]]></surname>
<given-names><![CDATA[H.A.]]></given-names>
</name>
<name>
<surname><![CDATA[MENDOZA-MORALES]]></surname>
<given-names><![CDATA[L.F.]]></given-names>
</name>
<name>
<surname><![CDATA[LEAL-GUTIÉRREZ]]></surname>
<given-names><![CDATA[J.D.]]></given-names>
</name>
<name>
<surname><![CDATA[SÁNCHEZ-ISAZA]]></surname>
<given-names><![CDATA[C.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factores que influencian la prolificidad en ovinos del centro agropecuario marengo, Colombia]]></article-title>
<source><![CDATA[Actas Iberoamericanas de Conservación Animal AICA]]></source>
<year>2015</year>
<volume>6</volume>
<page-range>460-5</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[FERGUSON]]></surname>
<given-names><![CDATA[M.B.]]></given-names>
</name>
<name>
<surname><![CDATA[THOMPSON]]></surname>
<given-names><![CDATA[A.N.]]></given-names>
</name>
<name>
<surname><![CDATA[GORDON]]></surname>
<given-names><![CDATA[D.J.]]></given-names>
</name>
<name>
<surname><![CDATA[HYDER]]></surname>
<given-names><![CDATA[M.W.]]></given-names>
</name>
<name>
<surname><![CDATA[KEARNEY]]></surname>
<given-names><![CDATA[G.A.]]></given-names>
</name>
<name>
<surname><![CDATA[OLDHAM]]></surname>
<given-names><![CDATA[C.M.]]></given-names>
</name>
<name>
<surname><![CDATA[PAGANONI]]></surname>
<given-names><![CDATA[B.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The wool production and reproduction of Merino ewes can be predicted from changes in liveweight during pregnancy and lactation]]></article-title>
<source><![CDATA[Animal Production Science]]></source>
<year>2011</year>
<volume>51</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>763-75</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[FERNÁNDEZ]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[USECHE]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Comportamiento productivo de las ovejas Blackface, Cheviot, Criolla y sus cruces en Obonuco, Nariño]]></source>
<year>1981</year>
<publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Medicina Veterinaria y Ciencias Animales, Universidad Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<label>14.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GAVIRIA]]></surname>
<given-names><![CDATA[M.T.]]></given-names>
</name>
<name>
<surname><![CDATA[HERNÁNDEZ]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Morphometry of implantation in sheep I. Trophoblast attachment, Modification of the uterine lining, conceptus size and embryo location]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>1994</year>
<volume>41</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1139-49</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GAVOJDIAN]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[BUDAI]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[CZISZTER]]></surname>
<given-names><![CDATA[L.T.]]></given-names>
</name>
<name>
<surname><![CDATA[CSIZMAR]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[JAVOR]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[KUSZA]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reproduction efficiency and health traits in Dorper, White Dorper, and Tsigai sheep breeds under temperate European conditions]]></article-title>
<source><![CDATA[Asian-Australasian Journal of Animal Sciences]]></source>
<year>2015</year>
<volume>28</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>599-603</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[HULET]]></surname>
<given-names><![CDATA[C.V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Improving reproduction efficiency in sheep]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Hawk]]></surname>
<given-names><![CDATA[H.W.]]></given-names>
</name>
</person-group>
<collab>Beltsville Agricultural Research Center</collab>
<source><![CDATA[Animal Reproduction: Invited Papers]]></source>
<year>1979</year>
<edition>Vol.3</edition>
<page-range>31-40</page-range><publisher-name><![CDATA[Allanheld Osmun]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<label>17.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[HULET]]></surname>
<given-names><![CDATA[C.V.]]></given-names>
</name>
<name>
<surname><![CDATA[SHELTON]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sheeps and Goats]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Hafez]]></surname>
<given-names><![CDATA[E.S.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Reproduction in Farm Animals]]></source>
<year>1980</year>
<edition>4th ed</edition>
<page-range>346-57</page-range><publisher-name><![CDATA[Lea and Febiger]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>18.</label><nlm-citation citation-type="">
<collab>INSTITUTO COLOMBIANO AGROPECUARIO, ICA</collab>
<source><![CDATA[Censo Ovino en Colombia]]></source>
<year>2019</year>
</nlm-citation>
</ref>
<ref id="B19">
<label>19.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LOZANO-GONZÁLEZ]]></surname>
<given-names><![CDATA[J.F.]]></given-names>
</name>
<name>
<surname><![CDATA[URIBE-VELÁSQUEZ]]></surname>
<given-names><![CDATA[L.F.]]></given-names>
</name>
<name>
<surname><![CDATA[OSORIO]]></surname>
<given-names><![CDATA[J.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Control hormonal de la reproducción en hembras ovinas (Ovisaries)]]></article-title>
<source><![CDATA[Veterinaria y Zootecnia]]></source>
<year>2012</year>
<volume>6</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>134-47</page-range><publisher-loc><![CDATA[Colombia ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B20">
<label>20.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LUNA-PALOMERA]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[OJEDA-ROBERTOS]]></surname>
<given-names><![CDATA[N.F.]]></given-names>
</name>
<name>
<surname><![CDATA[PERALTA-TORRES]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<name>
<surname><![CDATA[MACÍAS-CRUZ]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[SÁNCHEZ-DÁVILA]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[SEGURA-CORREA]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of some reproductive traits of Pelibuey ewes under humid tropical conditions of Mexico]]></article-title>
<source><![CDATA[Revista Brasileira de Zootecnia]]></source>
<year>2019</year>
<volume>48</volume>
</nlm-citation>
</ref>
<ref id="B21">
<label>21.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MAKSIMOVI&#262;]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[MILOVANOVI&#262;]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[BARNA]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[DELI&#262;]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[STEFANOV]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[PANTELI&#262;]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[TAUSHANOVA]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of prostaglandin and hCG on out of season oestrous synchronization and fertility and assessment of progesterone concentration for early pregnancy diagnosis in ewes]]></article-title>
<source><![CDATA[ComptesRendus de l&#8217; AcademieBulgare des Sciences]]></source>
<year>2017</year>
<volume>70</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>885-94</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MARAI]]></surname>
<given-names><![CDATA[I.F.M.]]></given-names>
</name>
<name>
<surname><![CDATA[EL-DARAWANY]]></surname>
<given-names><![CDATA[A.A.]]></given-names>
</name>
<name>
<surname><![CDATA[FADIEL]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[ABDEL-HAFEZ]]></surname>
<given-names><![CDATA[M.A.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physiological traits as affected by heat stress in sheep - a review]]></article-title>
<source><![CDATA[Small ruminant research]]></source>
<year>2007</year>
<volume>71</volume>
<numero>1-3</numero>
<issue>1-3</issue>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MCNUTT]]></surname>
<given-names><![CDATA[J.W.]]></given-names>
</name>
<name>
<surname><![CDATA[GROOM]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[WOODROFFE]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ambient temperature provides an adaptive explanation for seasonal reproduction in a tropical mammal]]></article-title>
<source><![CDATA[Journal of Zoology]]></source>
<year>2019</year>
<volume>309</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>153-60</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MORENO]]></surname>
<given-names><![CDATA[D.C.]]></given-names>
</name>
<name>
<surname><![CDATA[GRAJALES]]></surname>
<given-names><![CDATA[H.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización de los sistemas de producción ovinos de trópico alto en Colombia: manejo e indicadores productivos y reproductivos]]></article-title>
<source><![CDATA[Revista de la Facultad de Medicina Veterinaria y de Zootecnia]]></source>
<year>2017</year>
<volume>64</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>36-51</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MORENO MENESES]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[MONTES VERGARA]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[UCROS PORRAS]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[FERNÁNDEZ QUINTERO]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[CARDONA ÁLVAREZ]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variabilidad morfoestructural de la hembra ovina de pelo criollo colombiana]]></article-title>
<source><![CDATA[Livestock Research for Rural Development]]></source>
<year>2013</year>
<volume>25</volume>
<numero>83</numero>
<issue>83</issue>
</nlm-citation>
</ref>
<ref id="B26">
<label>26.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[OBANDO CORREA]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[PASTRANA BONILLA]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[GIL PEDRAZA]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[CASTRO HERNANDEZ]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Perfiles de progesterona por RIA en ovejas sometidas a diferentes regímenes alimenticios]]></source>
<year>1988</year>
<page-range>6-21</page-range><publisher-name><![CDATA[Instituto Colombiano Agropecuario]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<label>27.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[OCAMPO]]></surname>
<given-names><![CDATA[R.J.]]></given-names>
</name>
<name>
<surname><![CDATA[MARTINEZ]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
<name>
<surname><![CDATA[ROCHA]]></surname>
<given-names><![CDATA[J.F.]]></given-names>
</name>
<name>
<surname><![CDATA[CARDONA]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic characterization of Colombian indigenous sheep]]></article-title>
<source><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></source>
<year>2017</year>
<volume>30</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>116-25</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PASTRANA]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Programa Nacional de ovinos. Informe anual 1974]]></source>
<year>1975</year>
<page-range>35</page-range><publisher-name><![CDATA[Instituto Colombiano Agropecuario, ICA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<label>29.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PAYARES-LUNA]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[HERNÁNDEZ-GOMEZ]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[RUGELES-PINTO]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[VERGARA-GARAY]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Edad a la pubertad, desarrollo corporal y testicular del ovino criollo (Ovis aries) de pelo en Córdoba-Colombia]]></article-title>
<source><![CDATA[Revista Científica]]></source>
<year>2018</year>
<volume>28</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>139-45</page-range><publisher-loc><![CDATA[Venezuela ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B30">
<label>30.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PÉREZ]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[PULIDO]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Parámetros productivos y reproductivos logrados en la oveja Manchada Paramuna]]></source>
<year>1989</year>
<publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Medicina Veterinaria y Ciencias Animales, Universidad Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<label>31.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[QUIRKE]]></surname>
<given-names><![CDATA[J.F.]]></given-names>
</name>
<name>
<surname><![CDATA[STABENFELDT]]></surname>
<given-names><![CDATA[G.H.]]></given-names>
</name>
<name>
<surname><![CDATA[BRADFORD]]></surname>
<given-names><![CDATA[G.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Onset of puberty and duration of the breeding season in Suffolk, Rambouillet, Finnish Landrace and Finn-Dorset ewes lambs]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>1985</year>
<volume>60</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1463-71</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[RODRÍGUEZ]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Otros aspectos reproductivos]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Castellanos]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Arellano]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tecnología para la Producción de Ovejas Tropicales]]></source>
<year>1989</year>
<publisher-name><![CDATA[SARH/FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<label>33.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SCOTT]]></surname>
<given-names><![CDATA[H.M.]]></given-names>
</name>
<name>
<surname><![CDATA[OSPINA]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[WILLIAMS]]></surname>
<given-names><![CDATA[H.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The development of a new breed of sheep in Colombia]]></article-title>
<source><![CDATA[British Veterinary Journal]]></source>
<year>1990</year>
<volume>146</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>106-12</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SHRESTHA]]></surname>
<given-names><![CDATA[J.N.B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Conserving domestic animal diversity among composite populations]]></article-title>
<source><![CDATA[Small Ruminant Research]]></source>
<year>2005</year>
<volume>56</volume>
<numero>1-3</numero>
<issue>1-3</issue>
<page-range>3-20</page-range></nlm-citation>
</ref>
<ref id="B35">
<label>35.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SKEA]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[PASTRANA]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Guía para el Manejo de un Rebaño]]></source>
<year>1980</year>
<page-range>108</page-range><publisher-name><![CDATA[Instituto Colombiano Agropecuario]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
