Effect of pre- and postpartum body development on the rebreeding of first-calf heifers
Efecto del desarrollo corporal pre y post parto en la reproducción de las novillas de la primera cría
| dc.contributor | en-US | |
| dc.contributor | es-ES | |
| dc.creator | Joner, Guilherme | |
| dc.creator | Alves Filho, Dari Celestino | |
| dc.creator | Brondani, Ivan Luiz | |
| dc.creator | Adams, Sander Martinho | |
| dc.creator | Moura, Amanda Farias de | |
| dc.creator | Cardoso, Gilmar dos Santos | |
| dc.creator | Silva, Mauren Burin da | |
| dc.creator | Cattelam, Patrícia Machado Martini | |
| dc.date | 2019-12-17 | |
| dc.date.accessioned | 2021-01-18T16:29:24Z | |
| dc.date.available | 2021-01-18T16:29:24Z | |
| dc.identifier | https://www.rcia.uc.cl/index.php/ijanr/article/view/1984 | |
| dc.identifier | 10.7764/rcia.v46i3.1984 | |
| dc.identifier.uri | https://revistaschilenas.uchile.cl/handle/2250/161745 | |
| dc.description | The objective of this study was to evaluate the effect of live weight and body condition score, measured at different growth stages, on the rebreeding of first-calf heifers. A total of 120 Nellore and Charolais crossbred heifers born between 2004 and 2008 were assessed. Their average age was 26±1 months, they were all from the same herd, and they received the same management from birth. To conduct this study, pre- and postpartum measurements of first-calf heifers were taken. The data were submitted to analysis of variance, and the means were compared using Student’s t-test at a significance level of α=0.05. A higher live weight of the heifer at 24 months enabled early calving within the first calving season (r=-0.30). First-calf heifers that rebred had a higher live weight at weaning (361 kg vs. 333 kg) than those that did not, although their live weights at calving were similar (344 kg vs. 332 kg). The rebreeding of first-calf heifers that gave birth with the same body condition score as in the first calving was dependent on positive live weight gain until the end of the following breeding season, especially during the calving-weaning period. | en-US |
| dc.description | El objetivo de este estudio fue evaluar el efecto del peso vivo y la puntuación de condición corporal, medido en diferentes fases de crecimiento, sobre la repetición de la cría en primíparas. Se evaluaron 120 novillas cruzadas Nellore con Charoles nacidas entre los años 2004 y 2008, con edad media de 26±1 meses siendo todas oriundas del mismo rebaño y que reciben idéntico manejo desde el nacimiento. Para la realización de este estudio se utilizaron de la base de datos a las mediciones de la primípara en el pre y post-partos. Los datos fueron sometidos al análisis de varianza y las medias comparadas a través del test “t” de Student, a α=0,05 de probabilidad. El mayor del peso vivo de la novilla a los 24 meses proporciona que el parto ocurra por adelantado dentro de la primera estación de parición (r=-0,30). Primíparas que repetían crea presentaron mayor peso vivo al destete (361 kg vs. 333 kg) de las que no repitieron crea, aunque hubiera peso vivo al parto semejante entre sí (344 kg vs. 332 kg). La repetición de la cría de primíparas que paren con la misma puntuación de condición corporal, en el primer parto, es dependiente de la ganancia de peso vivo positivo hasta el final de la estación de montaje siguiente, principalmente en el período parto-destete. | es-ES |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Pontificia Universidad Católica de Chile | en-US |
| dc.relation | https://www.rcia.uc.cl/index.php/ijanr/article/view/1984/1339 | |
| dc.relation | https://www.rcia.uc.cl/index.php/ijanr/article/downloadSuppFile/1984/526 | |
| dc.rights | Copyright (c) 2019 Ciencia e Investigación Agraria | en-US |
| dc.rights | http://creativecommons.org/licenses/by/4.0 | en-US |
| dc.source | International Journal of Agriculture and Natural Resources; Vol 46, No 3 (2019); 243-252 | en-US |
| dc.source | International Journal of Agriculture and Natural Resources; Vol 46, No 3 (2019); 243-252 | es-ES |
| dc.source | 2452-5731 | |
| dc.source | 2452-5731 | |
| dc.subject | animal science; beef cattle; native grasslands | en-US |
| dc.subject | Calving-to-conception interval, calving season, crossbreeding, live weight at calving, reproductive efficiency | en-US |
| dc.subject | es-ES | |
| dc.subject | Cruzamiento, eficiencia reproductiva, estación de parición, intervalo partoconcepción, peso vivo al parto | es-ES |
| dc.title | Effect of pre- and postpartum body development on the rebreeding of first-calf heifers | en-US |
| dc.title | Efecto del desarrollo corporal pre y post parto en la reproducción de las novillas de la primera cría | es-ES |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | en-US | |
| dc.type | es-ES |