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Estimating overnight weight loss of corralled yearling steers in semiarid rangeland

Colaborador(es): Derner, Justin D. Society for Range Management. Kansas, USA | Reeves, Justin L. Society for Range Management. Kansas, USA | Mortenson, Matthew C. Society for Range Management. Kansas, USA | West, Mark. US Dept of Agriculture – Agricultural Research Service – Rangeland Resources Research Unit. Area Statistician. Cheyenne, USA. US Dept of Agriculture – Agricultural Research Service – Plains Area, USA | Irisarri, Jorge Gonzalo Nicolás. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Cátedra de Forrajicultura. Buenos Aires, Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina | Durante, Martín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Concepción del Uruguay, Entre Ríos, Argentina.
ISSN: 0190-0528.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): AIR TEMPERATURE | OVERNIGHT SHRINK | RELATIVE HUMIDITY | REMOTE SENSING | SHORTGRASS STEPPE | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: Rangelands Vol.38, no.3 (2016), p.101-104, tbls.Resumen: A common practice for assessing livestock weight gains from grazing animals on rangelands is to confine animals overnight without feed or water to reduce variation in weight loss and percent shrink. Advances in remote sensing of vegetation, such as the formalized Difference Vegetation Index (NDVI) provide opportunities to estimate greenness (an indicator of both the quality and quantity of the plant community) that could be used with air temperature and relative humidity as predictors of percent shrink in grazing animals. We determined percent shrink losses from crossbred yearling steers at each of four weigh dates for four consecutive years. Percent overnight shrink by yearling steers grazing semiarid rangeland was influenced positively by air temperature and NDVI values, but not relative humidity. The prediction equation we developed can provide temporal weight gain data within a grazing season without the logistical difficulties in gathering and holding animals, as well as eliminate associated animal stress from shrinking and regaining gut fill multiple times.
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A common practice for assessing livestock weight gains from grazing animals on rangelands is to confine animals overnight without feed or water to reduce variation in weight loss and percent shrink.
Advances in remote sensing of vegetation, such as the formalized Difference Vegetation Index (NDVI) provide opportunities to estimate greenness (an indicator of both the quality and quantity of the plant community) that could be used with air temperature and relative humidity as predictors of percent shrink in grazing animals.
We determined percent shrink losses from crossbred yearling steers at each of four weigh dates for four consecutive years.
Percent overnight shrink by yearling steers grazing semiarid rangeland was influenced positively by air temperature and NDVI values, but not relative humidity.
The prediction equation we developed can provide temporal weight gain data within a grazing season without the logistical difficulties in gathering and holding animals, as well as eliminate associated animal stress from shrinking and regaining gut fill multiple times.

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