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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
12/06/2019 |
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Actualizado : |
12/06/2019 |
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Tipo de producción científica : |
Tesis |
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Autor : |
CORREA, D. |
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Afiliación : |
DANIELA CORREA NACIMENTO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Características de canal y carne de novillo Hereford de Uruguay: ganancias pos-destetes de DEP para área del ojo del bife. |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
Montevideo (Uruguay): FAGRO, 2019. |
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Páginas : |
97 p. |
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Idioma : |
Español |
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Notas : |
TESIS presentada como uno de los requisitos para obtener el título de Magister en Ciencias Agrarias opción Ciencia Animal. Tesis aprobada por el tribunal integrado por Ing. Agr. (Dra) Ana Carolina Espandín, Ing. Agr. (Dra) Virginia Beretta y MDV (MSc) Juan Franco, el 1° de marzo de 2019. Director Ing. Agr. (PhD) Gustavo Brito, Ing. Agr. (PhD) Olga Ravagnolo. |
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Contenido : |
RESUMEN: Producir canales y carne de alta calidad en forma constante y de acuerdo a exigencias de calidad de los mercados, implica la comprensión de los factores que determinan que esta calidad varíe. El objetivo del trabajo fue evaluar el efecto de diferentes ganancias invernales pos destete (Recría) en terneros hijos de padres con diferencia esperada de progenie (DEP) para área de ojo de bife (AOB) sobre características de canal y calidad de carne. Tres generaciones de terneros (n=317) con peso vivo (PV) al destete (PD) de 174 ± 30 kg, fueron agrupados en dos bloques de acuerdo a su PD en un arreglo factorial de 2 x 2, para AOB (Alta: A; Promedio: P) y Recría (Alta: A; Baja: B). Posterior a la recría invernal a corral, pasaron a una fase de pastura con una asignación de forraje del 5 % del PV de los novillos, al alcanzar los 338 ± 32 kg de PV (promedio/grupo) ingresaron a una terminación en corral. Fueron faenados cuando alcanzaron los 525±40 kg de PV. La Recría A presentó mayor (P<0,01) espesor de grasa subcutánea (EGSu) y grasa intramuscular por ultrasonido (GIMu) previo a la faena, menor (P<0,01) edad a la faena y mayores (P<0,05) pesos de canal cliente y enfriada (PCC, PCE), rendimiento en 4ª balanza (Rto_4ª), pesos de bife (P<0,01), lomo (P<0,05), cuadril (P<0,01) y carne (P<0,01) del Corte Pistola (CP). El AOB A presentó mayor (P<0,01) AOB medido por ultrasonido (AOBu), peso de bife (P<0,05), así como mayor % de Carne (P<0,01), relación Rump & Loin (R&L)/CP (P<0,01) y CP/PCE½i, media res enfriada izquierda (P<0,05). La fuerza de corte no fue afectada (P>0,05) por ninguno de los tratamientos. La Recría A presentó mayor grasa química (GIM %) (P<0,05) y el AOB P presentó mayor (P<0,05) valor de Marbling que AOB A. No se observó interacción AOB*Recría ni efecto año para la mayoría de las variables analizadas de composición de canal y calidad de carne. La ausencia de interacción para la mayoría de los caracteres analizados permite planificar manejos independientes al mejorar las condiciones de recría y/o utilizar toros superiores en características carniceras, al menos en los rangos considerados EPDs de AOB y de ganancias invernales en este estudio. SUMMARY/Carcass and meat quality traits of Uruguayan Hereford steers: post-weaning daily gain and EPDs for rib eye area:Producing high quality beef carcasses and meat considering both market requirements and production stability implies understanding the factors that explain quality variability. The objective of this study was to evaluate the effect of post-weaning winter stocking growth rates (WSGR) of Hereford steers from two groups of sires with contrasting values of Expected Progeny Differences (EPD) for rib eye area (REA) on carcass and meat quality traits. Three generations of calves (n=317) with an average weaning weight (WW) of 174±30 kg, were randomly allotted into two replicates in a 2 x 2 factorial arrangement, in which factors were REA (High: H; Average: Av) and WSGR (High: H; Low: L), during winter. After the winter phase, all calves grazed on pastures where herbage allowance was maintained at 5% of their live weight (LW) per day. When animals reached a LW of 338 ± 32 kg, they were finished in a feedlot. Animals were harvested at a constant LW of 525±40 kg. The H WSGR treatment increased (P<0.01) ultrasound back fat thickness (BFTu) and intramuscular ultrasound fat (IMFu), decreased (P<0.01) slaughter age, increased (P<0.05) hot and cold carcass weight (HCW and CCW) and dressing percentage (Dress_4th). It also increased striploin (P<0.01), tenderloin (P<0.05), sirloin (P<0.01) and Pistola cut (PC) lean (kg). On the other hand, H REA increased (P<0.01) REAu, (P<0.05), striploin (P<0.01) as well as the proportion of lean (%) (P<0.01), the ratio Rump and Loin (R&L)/PC (P<0.01) and PC/CCW from the left side (P<0.05). Tenderness did not differ (P>0.05) between treatments. High WSGR had a greater IMF (%) (P<0.05) and Av REA had a higher (P<0.05) marbling score than H REA. No interaction between REA and WSGR and no year effect was observed on neither carcass nor meat quality. This lack of interaction implies that both higher REA and WSGR allows benefits for the rearing phase, at least within the range of EPDs and WSGR considered in this study. MenosRESUMEN: Producir canales y carne de alta calidad en forma constante y de acuerdo a exigencias de calidad de los mercados, implica la comprensión de los factores que determinan que esta calidad varíe. El objetivo del trabajo fue evaluar el efecto de diferentes ganancias invernales pos destete (Recría) en terneros hijos de padres con diferencia esperada de progenie (DEP) para área de ojo de bife (AOB) sobre características de canal y calidad de carne. Tres generaciones de terneros (n=317) con peso vivo (PV) al destete (PD) de 174 ± 30 kg, fueron agrupados en dos bloques de acuerdo a su PD en un arreglo factorial de 2 x 2, para AOB (Alta: A; Promedio: P) y Recría (Alta: A; Baja: B). Posterior a la recría invernal a corral, pasaron a una fase de pastura con una asignación de forraje del 5 % del PV de los novillos, al alcanzar los 338 ± 32 kg de PV (promedio/grupo) ingresaron a una terminación en corral. Fueron faenados cuando alcanzaron los 525±40 kg de PV. La Recría A presentó mayor (P<0,01) espesor de grasa subcutánea (EGSu) y grasa intramuscular por ultrasonido (GIMu) previo a la faena, menor (P<0,01) edad a la faena y mayores (P<0,05) pesos de canal cliente y enfriada (PCC, PCE), rendimiento en 4ª balanza (Rto_4ª), pesos de bife (P<0,01), lomo (P<0,05), cuadril (P<0,01) y carne (P<0,01) del Corte Pistola (CP). El AOB A presentó mayor (P<0,01) AOB medido por ultrasonido (AOBu), peso de bife (P<0,05), así como mayor % de Carne (P<0,01), relación Rump & Loin (R&L)/CP (P<0,01) ... Presentar Todo |
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Palabras claves : |
BOVINOS DE CARNE; CARCASS COMPOSITION; CATTLE BEEF; COMPOSICIÓN DE CANAL; DEP ÁREA DE OJO DE BIFE; MEAT QUALITY; REARING; RECRÍA INVERNAL; RIB EYE AREA. |
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Thesagro : |
CALIDAD DE LA CARNE. |
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Asunto categoría : |
L01 Ganadería |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12821/1/Tesis-Maestria-CORREA-2019.pdf
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Marc : |
LEADER 05425nam a2200253 a 4500
001 1059840
005 2019-06-12
008 2019 bl uuuu m 00u1 u #d
100 1 $aCORREA, D.
245 $aCaracterísticas de canal y carne de novillo Hereford de Uruguay$bganancias pos-destetes de DEP para área del ojo del bife.$h[electronic resource]
260 $aMontevideo (Uruguay): FAGRO$c2019
300 $a97 p.
500 $aTESIS presentada como uno de los requisitos para obtener el título de Magister en Ciencias Agrarias opción Ciencia Animal. Tesis aprobada por el tribunal integrado por Ing. Agr. (Dra) Ana Carolina Espandín, Ing. Agr. (Dra) Virginia Beretta y MDV (MSc) Juan Franco, el 1° de marzo de 2019. Director Ing. Agr. (PhD) Gustavo Brito, Ing. Agr. (PhD) Olga Ravagnolo.
520 $aRESUMEN: Producir canales y carne de alta calidad en forma constante y de acuerdo a exigencias de calidad de los mercados, implica la comprensión de los factores que determinan que esta calidad varíe. El objetivo del trabajo fue evaluar el efecto de diferentes ganancias invernales pos destete (Recría) en terneros hijos de padres con diferencia esperada de progenie (DEP) para área de ojo de bife (AOB) sobre características de canal y calidad de carne. Tres generaciones de terneros (n=317) con peso vivo (PV) al destete (PD) de 174 ± 30 kg, fueron agrupados en dos bloques de acuerdo a su PD en un arreglo factorial de 2 x 2, para AOB (Alta: A; Promedio: P) y Recría (Alta: A; Baja: B). Posterior a la recría invernal a corral, pasaron a una fase de pastura con una asignación de forraje del 5 % del PV de los novillos, al alcanzar los 338 ± 32 kg de PV (promedio/grupo) ingresaron a una terminación en corral. Fueron faenados cuando alcanzaron los 525±40 kg de PV. La Recría A presentó mayor (P<0,01) espesor de grasa subcutánea (EGSu) y grasa intramuscular por ultrasonido (GIMu) previo a la faena, menor (P<0,01) edad a la faena y mayores (P<0,05) pesos de canal cliente y enfriada (PCC, PCE), rendimiento en 4ª balanza (Rto_4ª), pesos de bife (P<0,01), lomo (P<0,05), cuadril (P<0,01) y carne (P<0,01) del Corte Pistola (CP). El AOB A presentó mayor (P<0,01) AOB medido por ultrasonido (AOBu), peso de bife (P<0,05), así como mayor % de Carne (P<0,01), relación Rump & Loin (R&L)/CP (P<0,01) y CP/PCE½i, media res enfriada izquierda (P<0,05). La fuerza de corte no fue afectada (P>0,05) por ninguno de los tratamientos. La Recría A presentó mayor grasa química (GIM %) (P<0,05) y el AOB P presentó mayor (P<0,05) valor de Marbling que AOB A. No se observó interacción AOB*Recría ni efecto año para la mayoría de las variables analizadas de composición de canal y calidad de carne. La ausencia de interacción para la mayoría de los caracteres analizados permite planificar manejos independientes al mejorar las condiciones de recría y/o utilizar toros superiores en características carniceras, al menos en los rangos considerados EPDs de AOB y de ganancias invernales en este estudio. SUMMARY/Carcass and meat quality traits of Uruguayan Hereford steers: post-weaning daily gain and EPDs for rib eye area:Producing high quality beef carcasses and meat considering both market requirements and production stability implies understanding the factors that explain quality variability. The objective of this study was to evaluate the effect of post-weaning winter stocking growth rates (WSGR) of Hereford steers from two groups of sires with contrasting values of Expected Progeny Differences (EPD) for rib eye area (REA) on carcass and meat quality traits. Three generations of calves (n=317) with an average weaning weight (WW) of 174±30 kg, were randomly allotted into two replicates in a 2 x 2 factorial arrangement, in which factors were REA (High: H; Average: Av) and WSGR (High: H; Low: L), during winter. After the winter phase, all calves grazed on pastures where herbage allowance was maintained at 5% of their live weight (LW) per day. When animals reached a LW of 338 ± 32 kg, they were finished in a feedlot. Animals were harvested at a constant LW of 525±40 kg. The H WSGR treatment increased (P<0.01) ultrasound back fat thickness (BFTu) and intramuscular ultrasound fat (IMFu), decreased (P<0.01) slaughter age, increased (P<0.05) hot and cold carcass weight (HCW and CCW) and dressing percentage (Dress_4th). It also increased striploin (P<0.01), tenderloin (P<0.05), sirloin (P<0.01) and Pistola cut (PC) lean (kg). On the other hand, H REA increased (P<0.01) REAu, (P<0.05), striploin (P<0.01) as well as the proportion of lean (%) (P<0.01), the ratio Rump and Loin (R&L)/PC (P<0.01) and PC/CCW from the left side (P<0.05). Tenderness did not differ (P>0.05) between treatments. High WSGR had a greater IMF (%) (P<0.05) and Av REA had a higher (P<0.05) marbling score than H REA. No interaction between REA and WSGR and no year effect was observed on neither carcass nor meat quality. This lack of interaction implies that both higher REA and WSGR allows benefits for the rearing phase, at least within the range of EPDs and WSGR considered in this study.
650 $aCALIDAD DE LA CARNE
653 $aBOVINOS DE CARNE
653 $aCARCASS COMPOSITION
653 $aCATTLE BEEF
653 $aCOMPOSICIÓN DE CANAL
653 $aDEP ÁREA DE OJO DE BIFE
653 $aMEAT QUALITY
653 $aREARING
653 $aRECRÍA INVERNAL
653 $aRIB EYE AREA
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INIA Tacuarembó (TBO) |
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 | Acceso al texto completo restringido a Biblioteca INIA Treinta y Tres. Por información adicional contacte bibliott@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
08/09/2014 |
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Actualizado : |
25/11/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
A - 2 |
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Autor : |
ROVIRA, P.J. |
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Afiliación : |
PABLO JUAN ROVIRA SANZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
The effect of type of shade on physiology, behaviour and performance of grazing steers. |
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Fecha de publicación : |
2014 |
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Fuente / Imprenta : |
Animal, 2014, v. 8, no.3 p. 470-476. |
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ISSN : |
1751-7311 |
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DOI : |
10.1017/S1751731113002413 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 12 July 2013; Accepted 5 December 2013; First published online 15 January 2014. |
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Contenido : |
Abstract:
Research has addressed the issue of type of shade mainly on feedlots and high-producing dairy farms, but more studies are needed on the impact of shade on grazing beef cattle in a low-to-medium plane of nutrition. A 63-day grazing study using 24 British steers (268±4 kg) was undertaken in Uruguay (33°14'S, 54°15'W) to determine the effect of type of artificial shade on tympanic temperature (TT), behaviour and performance during summer. Cattle were allocated to six paddocks with an area of 2.5 ha each (four steers/paddock) continuously grazed. Treatments (two paddocks/treatment) were unshaded (US) and shaded with either 35% (35S) or 80% (80S) blockage of solar radiation. TT was recorded during 12 days placing an automatic device near the tympanic membrane inside the animal?s ear. Animal behaviours were measured by live observations of animals every 15 min from 1100 to 1600 h six times during the experimental period. According to the temperature?humidity index (THI), cattle was in the ?normal? category (THI<70, absence of heat stress) during 50% of the time, the rest being exposed to some degree of heat stress including 15% of the time with environmental conditions. Black globe temperature and surface soil temperature decreased as solar protection increased under the shade structure. Steers spent more time under the 80S structure than under the 35S between 1100 and 1600 h (83% and 49% of the time, respectively). Average 24-h TT did not differ among treatments (mean±s.e. 38.79±0.04ºC). Minimum TT was registered at 0700 h for all treatments (37.92±0.08ºC), whereas maximum TT was reached at 1700 h for both control group (39.73±0.18ºC) and 35% shade (39.48±0.12ºC) and at 1900 h for 80% shade (39.57±0.15ºC). Neither the provision nor the type of shade affected animal performance (0.622±0.060 kg/a per day), indicating the ability of cattle to acclimate and/or compensate for eventually short-term severe heat stress events. The results of this experiment suggest that the provision of shade with either 35% or 80% of blockage of solar radiation is recommended for the improvement of cattle well-being (expressed through changes in behaviour) without significantly affecting animal performance and TT. However, the overall results of the 63 days of the study can mask or dilute punctual effects of short heat stress events on cattle. More powerful experimental designs are required to address this issue in temperate regions. MenosAbstract:
Research has addressed the issue of type of shade mainly on feedlots and high-producing dairy farms, but more studies are needed on the impact of shade on grazing beef cattle in a low-to-medium plane of nutrition. A 63-day grazing study using 24 British steers (268±4 kg) was undertaken in Uruguay (33°14'S, 54°15'W) to determine the effect of type of artificial shade on tympanic temperature (TT), behaviour and performance during summer. Cattle were allocated to six paddocks with an area of 2.5 ha each (four steers/paddock) continuously grazed. Treatments (two paddocks/treatment) were unshaded (US) and shaded with either 35% (35S) or 80% (80S) blockage of solar radiation. TT was recorded during 12 days placing an automatic device near the tympanic membrane inside the animal?s ear. Animal behaviours were measured by live observations of animals every 15 min from 1100 to 1600 h six times during the experimental period. According to the temperature?humidity index (THI), cattle was in the ?normal? category (THI<70, absence of heat stress) during 50% of the time, the rest being exposed to some degree of heat stress including 15% of the time with environmental conditions. Black globe temperature and surface soil temperature decreased as solar protection increased under the shade structure. Steers spent more time under the 80S structure than under the 35S between 1100 and 1600 h (83% and 49% of the time, respectively). Average 24-h TT did not differ among treatments (mean±s... Presentar Todo |
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Palabras claves : |
BEHAVIOUR; CATTLE; HEAT STRESS; SHADE; TYMPANIC TEMPERATURE. |
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Thesagro : |
BOVINOS; COMPORTAMIENTO ANIMAL; ESTRÉS TÉRMINCO; SOMBRA; URUGUAY. |
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Asunto categoría : |
L20 Ecología animal |
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Marc : |
LEADER 03316naa a2200277 a 4500
001 1050026
005 2019-11-25
008 2014 bl uuuu u00u1 u #d
022 $a1751-7311
024 7 $a10.1017/S1751731113002413$2DOI
100 1 $aROVIRA, P.J.
245 $aThe effect of type of shade on physiology, behaviour and performance of grazing steers.$h[electronic resource]
260 $c2014
500 $aArticle history: Received 12 July 2013; Accepted 5 December 2013; First published online 15 January 2014.
520 $aAbstract: Research has addressed the issue of type of shade mainly on feedlots and high-producing dairy farms, but more studies are needed on the impact of shade on grazing beef cattle in a low-to-medium plane of nutrition. A 63-day grazing study using 24 British steers (268±4 kg) was undertaken in Uruguay (33°14'S, 54°15'W) to determine the effect of type of artificial shade on tympanic temperature (TT), behaviour and performance during summer. Cattle were allocated to six paddocks with an area of 2.5 ha each (four steers/paddock) continuously grazed. Treatments (two paddocks/treatment) were unshaded (US) and shaded with either 35% (35S) or 80% (80S) blockage of solar radiation. TT was recorded during 12 days placing an automatic device near the tympanic membrane inside the animal?s ear. Animal behaviours were measured by live observations of animals every 15 min from 1100 to 1600 h six times during the experimental period. According to the temperature?humidity index (THI), cattle was in the ?normal? category (THI<70, absence of heat stress) during 50% of the time, the rest being exposed to some degree of heat stress including 15% of the time with environmental conditions. Black globe temperature and surface soil temperature decreased as solar protection increased under the shade structure. Steers spent more time under the 80S structure than under the 35S between 1100 and 1600 h (83% and 49% of the time, respectively). Average 24-h TT did not differ among treatments (mean±s.e. 38.79±0.04ºC). Minimum TT was registered at 0700 h for all treatments (37.92±0.08ºC), whereas maximum TT was reached at 1700 h for both control group (39.73±0.18ºC) and 35% shade (39.48±0.12ºC) and at 1900 h for 80% shade (39.57±0.15ºC). Neither the provision nor the type of shade affected animal performance (0.622±0.060 kg/a per day), indicating the ability of cattle to acclimate and/or compensate for eventually short-term severe heat stress events. The results of this experiment suggest that the provision of shade with either 35% or 80% of blockage of solar radiation is recommended for the improvement of cattle well-being (expressed through changes in behaviour) without significantly affecting animal performance and TT. However, the overall results of the 63 days of the study can mask or dilute punctual effects of short heat stress events on cattle. More powerful experimental designs are required to address this issue in temperate regions.
650 $aBOVINOS
650 $aCOMPORTAMIENTO ANIMAL
650 $aESTRÉS TÉRMINCO
650 $aSOMBRA
650 $aURUGUAY
653 $aBEHAVIOUR
653 $aCATTLE
653 $aHEAT STRESS
653 $aSHADE
653 $aTYMPANIC TEMPERATURE
773 $tAnimal, 2014$gv. 8, no.3 p. 470-476.
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