REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO
The objective of this paper is to analyze information on reproductive patterns of the Pelibuey ewe in tropical México. Initially, a decrease in the Pelibuey ewe´s reproductive activity was attributed to seasonal nutritional deficiencies; however, recent studies show that this decline is more obvious from March to May, regardless of good nutrition. It has been observed that the season of the year also affects prolificness, especially when females are bred in autumn; whereas ewes lambing during the first months of the year, have a tendency to show longer postpartum anoestrus periods and interlambing intervals, than ewes lambing during summer or autumn. On the other hand, regardless of nutrition and body weight, ewes born in spring reach puberty at a younger age that those born in summer or autumn. According to the reviewed information, even under conditions of constant nutrition, the ovaric activity of the Pelibuey ewe is affected by the season of the year. However, no studies were found about the effects of photoperiods upon the reproductive pattern of the Pelibuey sheep in tropical México.
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Colegio de Postgraduados
1999
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oai:ojs.pkp.sfu.ca:article15842020-05-14T14:25:09Z REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO PATRONES REPRODUCTIVOS DE LA OVEJA PELIBUEY EN EL TROPICO MEXICANO Martínez-Rojero, Rubén D. Ewe fertility prolificness postpartum anoestrus puberty animal science tropics Fertilidad de ovejas prolificidad anestro postparto pubertad ciencia animal trópico The objective of this paper is to analyze information on reproductive patterns of the Pelibuey ewe in tropical México. Initially, a decrease in the Pelibuey ewe´s reproductive activity was attributed to seasonal nutritional deficiencies; however, recent studies show that this decline is more obvious from March to May, regardless of good nutrition. It has been observed that the season of the year also affects prolificness, especially when females are bred in autumn; whereas ewes lambing during the first months of the year, have a tendency to show longer postpartum anoestrus periods and interlambing intervals, than ewes lambing during summer or autumn. On the other hand, regardless of nutrition and body weight, ewes born in spring reach puberty at a younger age that those born in summer or autumn. According to the reviewed information, even under conditions of constant nutrition, the ovaric activity of the Pelibuey ewe is affected by the season of the year. However, no studies were found about the effects of photoperiods upon the reproductive pattern of the Pelibuey sheep in tropical México. En este ensayo se analiza información acerca de los patrones reproductivos de la oveja Pelibuey en el trópico mexicano. Aunque inicialmente se le atribuyó a deficiencias nutricionales estacionales, la mayoría de los estudios recientes coinciden en que la oveja disminuye su actividad reproductiva durante los meses de marzo a mayo, aunque la nutrición sea buena. La época del año afecta la prolificidad de la oveja; ésta es mayor cuando las hembras se aparean durante el otoño, pero las que paren durante los primeros meses del año generalmente presentan periodos de anestro postparto e intervalos entre partos más prolongados, que las que paren durante el verano o el otoño. Asimismo, se ha demostrado que independientemente de la nutrición y de su peso corporal, las corderas que nacen durante la primavera alcanzan la pubertad a una edad más joven que las que nacen en el verano o en el otoño. De acuerdo con la información analizada, aún en condiciones de alimentación constante, la época del año afecta la actividad ovárica de la oveja Pelibuey; sin embargo, en la literatura consultada no se encontraron estudios que evaluaran el efecto del fotoperiodo en el patrón reproductivo de este tipo de oveja en las regiones tropicales de México. Colegio de Postgraduados 1999-03-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1584 Agrociencia; Vol. 33 No. 1 (1999): 1999-ene-mar; 75-80 Agrociencia; Vol. 33 Núm. 1 (1999): 1999-ene-mar; 75-80 2521-9766 1405-3195 spa https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1584/1584 |
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México |
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| databasecode |
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| tag |
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| region |
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| libraryname |
Departamento de documentación y biblioteca de COLPOS |
| language |
spa |
| format |
Digital |
| author |
Martínez-Rojero, Rubén D. |
| spellingShingle |
Martínez-Rojero, Rubén D. REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| author_facet |
Martínez-Rojero, Rubén D. |
| author_sort |
Martínez-Rojero, Rubén D. |
| title |
REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| title_short |
REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| title_full |
REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| title_fullStr |
REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| title_full_unstemmed |
REPRODUCTIVE PATTERNS IN THE PELIBUEY EWE IN TROPICAL MEXICO |
| title_sort |
reproductive patterns in the pelibuey ewe in tropical mexico |
| description |
The objective of this paper is to analyze information on reproductive patterns of the Pelibuey ewe in tropical México. Initially, a decrease in the Pelibuey ewe´s
reproductive activity was attributed to seasonal nutritional deficiencies; however, recent studies show that this decline is more obvious from March to May, regardless of good nutrition. It
has been observed that the season of the year also affects prolificness, especially when females are bred in autumn; whereas ewes lambing during the first months of the year, have a tendency
to show longer postpartum anoestrus periods and interlambing intervals, than ewes lambing during summer or autumn. On the other hand, regardless of nutrition and body weight, ewes born in
spring reach puberty at a younger age that those born in summer or autumn. According to the reviewed information, even under conditions of constant nutrition, the ovaric activity of the
Pelibuey ewe is affected by the season of the year. However, no studies were found about the effects of photoperiods upon the reproductive pattern of the Pelibuey sheep in tropical
México. |
| publisher |
Colegio de Postgraduados |
| publishDate |
1999 |
| url |
https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1584 |
| work_keys_str_mv |
AT martinezrojerorubend reproductivepatternsinthepelibueyeweintropicalmexico AT martinezrojerorubend patronesreproductivosdelaovejapelibueyeneltropicomexicano |
| _version_ |
1813452262958170112 |