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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 : |
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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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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INIA Treinta y Tres (TT) |
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| Registros recuperados : 233 | |
| 1. |  | ROVIRA, P.J. Consideraciones finales. In: ROVIRA, P.J. (Ed.). Uso de la sombra en la recría de novillos en sistemas pastoriles de la región Este del Uruguay. Montevideo (UY): INIA, 2012. p. 81-82 (INIA Serie Técnica; 202)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó; INIA Treinta y Tres. |
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| 4. | | ROVIRA, P.J. Análisis integrado de los trabajos experimentales. In: ROVIRA, P.J. (Ed.). Suplementación de bovinos con grano húmedo de sorgo y fuentes proteicas sobre campo natural. Montevideo (Uruguay): INIA, 2014. p. 81-89. (INIA Serie Técnica; 212)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA Treinta y Tres. |
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| 5. | | ROVIRA, P.J. Antecedentes. In: ROVIRA, P.J. (Ed.). Uso de la sombra en la recría de novillos en sistemas pastoriles de la región Este del Uruguay. Montevideo (UY): INIA, 2012. p. 3-12 (INIA Serie Técnica; 202)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó; INIA Treinta y Tres. |
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| Registros recuperados : 233 | |
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