<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282017000300555</article-id>
<article-id pub-id-type="doi">10.19136/era.a4n12.1195</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Age and weight at puberty in tropical dairy criollo heifers with and without supplementary feeding]]></article-title>
<article-title xml:lang="es"><![CDATA[Edad y peso a la pubertad en vaquillas criollo lechero tropical con y sin complementación alimenticia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Severino-Lendechy]]></surname>
<given-names><![CDATA[Víctor Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montiel-Palacios]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Hernández]]></surname>
<given-names><![CDATA[Ponciano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chiapas Escuela Maya de Estudios Agropecuarios ]]></institution>
<addr-line><![CDATA[Catazajá Chiapas]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Veracruzana Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Veracruz Veracruz]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Municipio Manlio Fabio Altamirano Veracruz]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>4</volume>
<numero>12</numero>
<fpage>555</fpage>
<lpage>561</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282017000300555&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282017000300555&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282017000300555&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: The effect of supplementary feeding on age and weight at puberty was evaluated in 79 pre-pubertal Tropical Dairy Criollo (TDC) heifers of 8 and 10 months of age, distributed in four treatments: T1 and T2) 8 month old heifers with and without supplementary feeding (WSF, n= 20) and (NSF, n= 20), respectively; T3 and T4) 10 month old heifers (WSF, n= 20) and (NSF, n= 19). Average age and weight at puberty in T2 and T4 was 20.4 ± 0.5 months and 287.2 ± 5.9 kg compared with 17.5 ± 0.6 months and 296.8 ± 7.8 kg in T1 and T3 (p &lt; 0.05). The number, follicular diameter (mm) and concentration of progesterone (ng mL-1) in blood was higher (p &lt; 0.05) in T1 and T3 compared to T2 and T4. Supplementary feeding decreases the age at puberty, increases weight gain, improves follicular development and increases blood progesterone concentration in TDC females.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: Se evaluó el efecto de la complementación alimenticia sobre la edad y peso a la pubertad en 79 hembras Criollo Lechero Tropical (CLT) prepúberes de 8 y 10 meses de edad, distribuidas en cuatro tratamientos: T1 y T2) vaquillas de 8 meses con y sin complementación alimenticia (CCA, n= 20) y (SCA, n= 20), respectivamente; T3 y T4) vaquillas de 10 meses (CCA, n= 20) y (SCA, n= 19). La edad y peso a la pubertad en T2 y T4 fue de 20.4 ± 0.5 meses y 287.2 ± 5.9 kg, en T1 y T3 fue de 17.5 ± 0.6 meses y 296.8 ± 7.8 kg. El número, diámetro folicular (mm) y concentración de progesterona (ng mL-1) en sangre fue mayor (p &lt; 0.05) en T1 y T3. La complementación alimenticia disminuye la edad a la pubertad, incrementa la ganancia de peso, mejora el desarrollo folicular y aumenta concentración de progesterona en sangre de hembras CLT.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Follicular dynamics]]></kwd>
<kwd lng="en"><![CDATA[estrus]]></kwd>
<kwd lng="en"><![CDATA[nutrition]]></kwd>
<kwd lng="en"><![CDATA[ovulation]]></kwd>
<kwd lng="en"><![CDATA[TDC]]></kwd>
<kwd lng="es"><![CDATA[Dinámica folicular]]></kwd>
<kwd lng="es"><![CDATA[estro]]></kwd>
<kwd lng="es"><![CDATA[nutrición]]></kwd>
<kwd lng="es"><![CDATA[ovulación]]></kwd>
<kwd lng="es"><![CDATA[CLT]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abeygunawardena]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Dematawewa]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prepuberal and postpartum anestrus in tropical Zebú cattle]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>2004</year>
<volume>82-83</volume>
<page-range>373-87</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bodas]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[López-Campos]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Mantecón]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Recría de terneras Parda de Montaña: alimentación y desarrollo productivo]]></article-title>
<source><![CDATA[Archivos de Zootecnia]]></source>
<year>2009</year>
<volume>58</volume>
<page-range>309-12</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Day]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Grum]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breeding strategies to optimize reproductive efficiency in beef herds]]></article-title>
<source><![CDATA[Veterinary Clinics of North America: Food Animal Practice]]></source>
<year>2005</year>
<volume>21</volume>
<page-range>367-81</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Alba]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los Criollos Lecheros Tropicales]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[J. de Alba]]></given-names>
</name>
</person-group>
<source><![CDATA[El libro de los bovinos criollos de América]]></source>
<year>2011</year>
<page-range>91-156</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Biblioteca Básica de Agricultura (Colegio de Postgraduados)]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Evans]]></surname>
<given-names><![CDATA[ACO]]></given-names>
</name>
<name>
<surname><![CDATA[Rawlings]]></surname>
<given-names><![CDATA[NC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fisiología de la pubertad de terneros y terneras]]></article-title>
<source><![CDATA[Taurus, Bs. As.]]></source>
<year>2010</year>
<volume>12</volume>
<page-range>11-23</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Faure]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La pubertad de la hembra bovina: I. Aspectos fisiológicos]]></article-title>
<source><![CDATA[Revista Salud Animal]]></source>
<year>2003</year>
<volume>25</volume>
<page-range>13-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Modificaciones al sistema de clasificación climática de Koppen]]></source>
<year>1981</year>
<edition>3</edition>
<publisher-loc><![CDATA[DF. México ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Geografía UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gasser]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Behlke]]></surname>
<given-names><![CDATA[EJ]]></given-names>
</name>
<name>
<surname><![CDATA[Grum]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Day]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of timing of feeding a high-concentrate diet on growth and attainment of puberty in early-weaned heifers]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>3118-22</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gasser]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Bridges]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Mussard]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Grum]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Kinder]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Day]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Induction of precocious puberty in heifers III: Hastened reduction of estradiol negative feedback on secretion of luteinizing hormone]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>2035-41</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gasser]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Burke]]></surname>
<given-names><![CDATA[CR]]></given-names>
</name>
<name>
<surname><![CDATA[Mussard]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Behlke]]></surname>
<given-names><![CDATA[EJ]]></given-names>
</name>
<name>
<surname><![CDATA[Grum]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Kinder]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Induction of precocious puberty in heifers II: Advanced ovarian follicular development]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>2042-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gasser]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Mussard]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Fluharty]]></surname>
<given-names><![CDATA[FL]]></given-names>
</name>
<name>
<surname><![CDATA[Day]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Induction of precocious puberty in heifers I: Enhanced secretion of luteinizing hormone]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2006</year>
<volume>84</volume>
<page-range>2050-6</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ginther]]></surname>
<given-names><![CDATA[OJ]]></given-names>
</name>
<name>
<surname><![CDATA[Kastelic]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Knopf]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Composition and characteristics of follicular waves during the bovine estrous cycle]]></article-title>
<source><![CDATA[Animal Reproduction Science]]></source>
<year>1989</year>
<volume>20</volume>
<page-range>187-200</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Stagnaro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Urbina]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Goicochea-Llaque]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Madrid-Bury]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[González-Villalobos]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Crecimiento pre-destete en hembras bovinas doble propósito]]></article-title>
<source><![CDATA[Revista Científica, Facultad de Ciencias Veterinarias-LUZ]]></source>
<year>2006</year>
<volume>16</volume>
<page-range>288-96</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Stagnaro]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[de la Fuente-Martínez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pubertad en novillas de la raza Española Avileña-Negra Ibérica]]></article-title>
<source><![CDATA[Revista Científica, Facultad de Ciencias Veterinarias-LUZ]]></source>
<year>2012</year>
<volume>22</volume>
<page-range>17-23</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lents]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Randel]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
<name>
<surname><![CDATA[Stelzleni]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Caldwell]]></surname>
<given-names><![CDATA[LC]]></given-names>
</name>
<name>
<surname><![CDATA[Welsh Jr]]></surname>
<given-names><![CDATA[TH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Function of the Corpus luteum in beef heifers is affected by acute submaintenance feeding but is not correlated with residual feed intake]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2011</year>
<volume>89</volume>
<page-range>4023-31</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maquivar]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Galina]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factors Affecting the readiness and preparation of replacement heifers in tropical breeding environments]]></article-title>
<source><![CDATA[Reproduction of Domestic Animals]]></source>
<year>2010</year>
<volume>45</volume>
<page-range>937-42</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maquivar]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Galina]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
<name>
<surname><![CDATA[Galindo]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Estrada]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[GD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of protein supplementation on reproductive and productive performance in Bos indicus x Bos taurus heifers raised in the humid tropics of Costa Rica]]></article-title>
<source><![CDATA[Tropical Animal Health Production]]></source>
<year>2010</year>
<volume>42</volume>
<page-range>555-60</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Patterson]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[RC]]></given-names>
</name>
<name>
<surname><![CDATA[Kiracofe]]></surname>
<given-names><![CDATA[GH]]></given-names>
</name>
<name>
<surname><![CDATA[Belows]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Staigmiller]]></surname>
<given-names><![CDATA[RB]]></given-names>
</name>
<name>
<surname><![CDATA[Corah]]></surname>
<given-names><![CDATA[LR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Management considerations in heifer development and puberty]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>1992</year>
<volume>70</volume>
<page-range>4018-35</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perry]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physiology and endocrinology symposium: Harnessing basic knowledge of factors controlling puberty to improve synchronization of estrus and fertility in heifers]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2012</year>
<volume>90</volume>
<page-range>1172-82</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peter]]></surname>
<given-names><![CDATA[AT]]></given-names>
</name>
<name>
<surname><![CDATA[Vos]]></surname>
<given-names><![CDATA[PLAM]]></given-names>
</name>
<name>
<surname><![CDATA[Ambrose]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Postpartum anestrus in dairy cattle]]></article-title>
<source><![CDATA[Theriogenology]]></source>
<year>2009</year>
<volume>71</volume>
<page-range>1333-42</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Romano]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Barnabe]]></surname>
<given-names><![CDATA[VH]]></given-names>
</name>
<name>
<surname><![CDATA[Kastelic]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[de Oliveira]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Romano]]></surname>
<given-names><![CDATA[RM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Follicular dynamics in heifers during pre-pubertal and pubertal period kept under two levels of dietary energy intake]]></article-title>
<source><![CDATA[Reproduction of Domestic Animals]]></source>
<year>2007</year>
<volume>42</volume>
<page-range>616-22</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sargentini]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Bozzi]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Diaz-Rivera]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Giorgetti]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Martini]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Lupi]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Onset of puberty in Maremmana heifers]]></article-title>
<source><![CDATA[Journal of Animal Science]]></source>
<year>2007</year>
<volume>6</volume>
<page-range>385-94</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vite]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[García-Muñiz]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ruíz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Producción de leche y comportamiento reproductivo de vacas de doble propósito que consumen forrajes tropicales y concentrados]]></article-title>
<source><![CDATA[Veterinaria México]]></source>
<year>2007</year>
<volume>38</volume>
<page-range>63-79</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
