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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
Fecha : |
29/11/2016 |
Actualizado : |
19/06/2017 |
Autor : |
ANDERSOHN, C. |
Título : |
El efecto de diferentes manejos de pastoreo sobre el tapiz vegetal: demostrado en el ejemplo del Uruguay |
Fecha de publicación : |
1991 |
Fuente / Imprenta : |
Berlin (Alemania): Universidad Técnica de Berlín. Facultad de Paisajismo. Instituto de Ecología, 1991 |
Páginas : |
182p. |
Idioma : |
Español |
Notas : |
Tesis (Ing. Paisajista) Universidad Técnica de Berlin. Facultad de Paisajismo, 1991 |
Palabras claves : |
GRASSLAND; HISTORIA DE LA GANADERÍA EN URUGUAY; NATURAL MEADOW; PASTURE; PRAIRIE. |
Thesagro : |
APLICACION DE ABONOS; CAMPO NATURAL; CIENCIA DEL SUELO; CLASIFICACION DE SUELOS; ECOSISTEMA; MANEJO DE PRADERAS; MANEJO DEL GANADO; MEJORA DE PASTIZALES; MEJORAMIENTO DE CAMPOS; PASTIZAL NATURAL; PASTOREO; RECURSOS NATURALES; RELACIONES PLANTA ANIMAL; SISTEMAS DE PASTOREO; URUGUAY. |
Asunto categoría : |
A50 Investigación agraria |
Marc : |
LEADER 01183nam a2200361 a 4500 001 1056172 005 2017-06-19 008 1991 bl uuuu m 00u1 u #d 100 1 $aANDERSOHN, C. 245 $aEl efecto de diferentes manejos de pastoreo sobre el tapiz vegetal$bdemostrado en el ejemplo del Uruguay 260 $aBerlin (Alemania): Universidad Técnica de Berlín. Facultad de Paisajismo. Instituto de Ecología$c1991 300 $a182p. 500 $aTesis (Ing. Paisajista) Universidad Técnica de Berlin. Facultad de Paisajismo, 1991 650 $aAPLICACION DE ABONOS 650 $aCAMPO NATURAL 650 $aCIENCIA DEL SUELO 650 $aCLASIFICACION DE SUELOS 650 $aECOSISTEMA 650 $aMANEJO DE PRADERAS 650 $aMANEJO DEL GANADO 650 $aMEJORA DE PASTIZALES 650 $aMEJORAMIENTO DE CAMPOS 650 $aPASTIZAL NATURAL 650 $aPASTOREO 650 $aRECURSOS NATURALES 650 $aRELACIONES PLANTA ANIMAL 650 $aSISTEMAS DE PASTOREO 650 $aURUGUAY 653 $aGRASSLAND 653 $aHISTORIA DE LA GANADERÍA EN URUGUAY 653 $aNATURAL MEADOW 653 $aPASTURE 653 $aPRAIRIE
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INIA Tacuarembó (TBO) |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
Fecha actual : |
12/09/2014 |
Actualizado : |
11/10/2019 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
A - 1 |
Autor : |
FIOL, C.; QUINTANS, G.; UNGERFELD, R. |
Afiliación : |
GRACIELA QUINTANS ILARIA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
Título : |
Response to biostimulation in peri-puberal beef heifers: Influence of male-female proximity and heifer's initial body weight. |
Fecha de publicación : |
2010 |
Fuente / Imprenta : |
Theriogenology, 2010, v. 74, no.4, p. 569-575. |
ISSN : |
0093-691X |
DOI : |
10.1016/j.theriogenology.2010.03.015 |
Idioma : |
Inglés |
Notas : |
Article history: Received 9 July 2009; received in revised form 23 December 2009; accepted 17 March 2010. |
Contenido : |
Abstract:
The objectives were to determine if exposure of 12 mo old peri-puberal beef heifers to androgenized steers for 35 d hastened puberty, and if the response was related to the physical proximity between males and females and to heifer?s initial body weight.
Hereford x Aberdeen Angus heifers (n = 131), 12 mo old, were assigned to two treatments: 1) Exposed group, exposed to androgenized steers from Day 0 to Day 35 (E, n = 66); or 2) Control group, isolated from the steers and other males (C, n = 65). Cyclic activity was determined through estrous behavior detection (twice daily) and weekly ultrasound imaging to detect a CL.
For each Exposed heifer, an association index (with males) was determined thrice weekly, based on the distance to androgenized steers every 10 min for 4 h (until cyclic activity began). Data were analyzed according to heifer?s initial body weight, which was categorized into three ranges (low, medium, and high, designated LW, MW, and HW, respectively). The cumulative proportion of cyclic heifers was greater for Exposed than Control heifers as of Day 21. By the end of the exposure period, more Exposed than Control heifers had attained puberty (16/66 vs. 2/65; P 0.001). Within the HW classification, more Exposed than Control heifers became puberal (11/20 vs. 2/21; P = 0.002). However, there were no differences between MW and LW in the proportions of heifers that reached puberty. Association index in Exposed heifers was greater in HW than in MW and LW (0.10 0.09 vs.
0.06 0.03 and 0.06 0.04; P 0.05), and in heifers that began cyclic activity compared to those that did not in the MW heifers (0.09 0.05 vs. 0.05 0.02; P = 0.01) and tended to be different in the HW treatment (0.12 0.10 vs. 0.06 0.02; P = 0.09).
In conclusion, exposure of peri-puberal beef heifers to androgenized steers for 35 d advanced puberty in heavier heifers; an earlier response occurred in heifers with greater proximity to androgenized steers. MenosAbstract:
The objectives were to determine if exposure of 12 mo old peri-puberal beef heifers to androgenized steers for 35 d hastened puberty, and if the response was related to the physical proximity between males and females and to heifer?s initial body weight.
Hereford x Aberdeen Angus heifers (n = 131), 12 mo old, were assigned to two treatments: 1) Exposed group, exposed to androgenized steers from Day 0 to Day 35 (E, n = 66); or 2) Control group, isolated from the steers and other males (C, n = 65). Cyclic activity was determined through estrous behavior detection (twice daily) and weekly ultrasound imaging to detect a CL.
For each Exposed heifer, an association index (with males) was determined thrice weekly, based on the distance to androgenized steers every 10 min for 4 h (until cyclic activity began). Data were analyzed according to heifer?s initial body weight, which was categorized into three ranges (low, medium, and high, designated LW, MW, and HW, respectively). The cumulative proportion of cyclic heifers was greater for Exposed than Control heifers as of Day 21. By the end of the exposure period, more Exposed than Control heifers had attained puberty (16/66 vs. 2/65; P 0.001). Within the HW classification, more Exposed than Control heifers became puberal (11/20 vs. 2/21; P = 0.002). However, there were no differences between MW and LW in the proportions of heifers that reached puberty. Association index in Exposed heifers was greater in HW than in MW and LW... Presentar Todo |
Palabras claves : |
BEEF HEIFERS; BIOSTIMULATION; MALE EFFECT; PUBERTY; SOCIO-SEXUAL STIMULUS. |
Thesagro : |
BOVINOS; CONDICION CORPORAL; ENTORE; TERNERAS. |
Asunto categoría : |
L53 Fisiología Animal - Reproducción |
Marc : |
LEADER 02912naa a2200289 a 4500 001 1050175 005 2019-10-11 008 2010 bl uuuu u00u1 u #d 022 $a0093-691X 024 7 $a10.1016/j.theriogenology.2010.03.015$2DOI 100 1 $aFIOL, C. 245 $aResponse to biostimulation in peri-puberal beef heifers$bInfluence of male-female proximity and heifer's initial body weight.$h[electronic resource] 260 $c2010 500 $aArticle history: Received 9 July 2009; received in revised form 23 December 2009; accepted 17 March 2010. 520 $aAbstract: The objectives were to determine if exposure of 12 mo old peri-puberal beef heifers to androgenized steers for 35 d hastened puberty, and if the response was related to the physical proximity between males and females and to heifer?s initial body weight. Hereford x Aberdeen Angus heifers (n = 131), 12 mo old, were assigned to two treatments: 1) Exposed group, exposed to androgenized steers from Day 0 to Day 35 (E, n = 66); or 2) Control group, isolated from the steers and other males (C, n = 65). Cyclic activity was determined through estrous behavior detection (twice daily) and weekly ultrasound imaging to detect a CL. For each Exposed heifer, an association index (with males) was determined thrice weekly, based on the distance to androgenized steers every 10 min for 4 h (until cyclic activity began). Data were analyzed according to heifer?s initial body weight, which was categorized into three ranges (low, medium, and high, designated LW, MW, and HW, respectively). The cumulative proportion of cyclic heifers was greater for Exposed than Control heifers as of Day 21. By the end of the exposure period, more Exposed than Control heifers had attained puberty (16/66 vs. 2/65; P 0.001). Within the HW classification, more Exposed than Control heifers became puberal (11/20 vs. 2/21; P = 0.002). However, there were no differences between MW and LW in the proportions of heifers that reached puberty. Association index in Exposed heifers was greater in HW than in MW and LW (0.10 0.09 vs. 0.06 0.03 and 0.06 0.04; P 0.05), and in heifers that began cyclic activity compared to those that did not in the MW heifers (0.09 0.05 vs. 0.05 0.02; P = 0.01) and tended to be different in the HW treatment (0.12 0.10 vs. 0.06 0.02; P = 0.09). In conclusion, exposure of peri-puberal beef heifers to androgenized steers for 35 d advanced puberty in heavier heifers; an earlier response occurred in heifers with greater proximity to androgenized steers. 650 $aBOVINOS 650 $aCONDICION CORPORAL 650 $aENTORE 650 $aTERNERAS 653 $aBEEF HEIFERS 653 $aBIOSTIMULATION 653 $aMALE EFFECT 653 $aPUBERTY 653 $aSOCIO-SEXUAL STIMULUS 700 1 $aQUINTANS, G. 700 1 $aUNGERFELD, R. 773 $tTheriogenology, 2010$gv. 74, no.4, p. 569-575.
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