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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
16/11/2015 |
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Actualizado : |
16/11/2015 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
B - 1 |
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Autor : |
KENYON, P.R.; VIÑOLES, C.; MORRIS, S.T |
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Afiliación : |
CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Effect of teasing by the ram on the onset of puberty in Romney ewe lambs. |
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Fecha de publicación : |
2012 |
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Fuente / Imprenta : |
New Zealand Journal of Agricultural Research, 2012, v.55, no.3, p. 183-191. |
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ISSN : |
N 0028-8233 |
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DOI : |
10.1080/00288233.2012.693105 |
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Idioma : |
Inglés |
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Contenido : |
ABSTRACT.
In two consecutive years (2008 and 2009), ewe lambs that had not attained puberty were allocated to one of two groups (Unteased [n=50 in both years] or Teased [n = 50 in 2008 and n=49 in 2009]) for 17 days (D1 to D17). In 2009, the ovaries of all ewe lambs were examined on D5, D9 and D12 by transrectal ultrasonography. From D18 to D28, crayon-harnessed teaser rams were introduced to both groups each year. In both years a greater proportion (P < 0.05) of Teased than Unteased ewe lambs achieved puberty (based on progesterone concentrations) during D1 to D17 and displayed oestrus during D18 to D28. Teased ewe lambs had larger (P < 0.05) follicle diameters on D9 and D12 compared with the Unteased but differences in corpus luteum sizes were not found (P > 0.05). We have demonstrated that teasing advances the onset of puberty. In ewe lambs that responded to teasing, it appears the response is somewhat delayed in comparison to that observed in mature ewes. |
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Palabras claves : |
EWE LAMBS; HOGGETS; PUBERTY; TEASING. |
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Thesagro : |
CORDEROS. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 01626naa a2200229 a 4500
001 1053922
005 2015-11-16
008 2012 bl uuuu u00u1 u #d
022 $aN 0028-8233
024 7 $a10.1080/00288233.2012.693105$2DOI
100 1 $aKENYON, P.R.
245 $aEffect of teasing by the ram on the onset of puberty in Romney ewe lambs.$h[electronic resource]
260 $c2012
520 $aABSTRACT. In two consecutive years (2008 and 2009), ewe lambs that had not attained puberty were allocated to one of two groups (Unteased [n=50 in both years] or Teased [n = 50 in 2008 and n=49 in 2009]) for 17 days (D1 to D17). In 2009, the ovaries of all ewe lambs were examined on D5, D9 and D12 by transrectal ultrasonography. From D18 to D28, crayon-harnessed teaser rams were introduced to both groups each year. In both years a greater proportion (P < 0.05) of Teased than Unteased ewe lambs achieved puberty (based on progesterone concentrations) during D1 to D17 and displayed oestrus during D18 to D28. Teased ewe lambs had larger (P < 0.05) follicle diameters on D9 and D12 compared with the Unteased but differences in corpus luteum sizes were not found (P > 0.05). We have demonstrated that teasing advances the onset of puberty. In ewe lambs that responded to teasing, it appears the response is somewhat delayed in comparison to that observed in mature ewes.
650 $aCORDEROS
653 $aEWE LAMBS
653 $aHOGGETS
653 $aPUBERTY
653 $aTEASING
700 1 $aVIÑOLES, C.
700 1 $aMORRIS, S.T
773 $tNew Zealand Journal of Agricultural Research, 2012$gv.55, no.3, p. 183-191.
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INIA Las Brujas (LB) |
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