Effect of zilpaterol hydrochloride on feedlot performance and carcass characteristics of ewe lambs during heat-stress conditions

2010 ◽  
Vol 50 (10) ◽  
pp. 983 ◽  
Author(s):  
U. Macías-Cruz ◽  
F. D. Álvarez-Valenzuela ◽  
N. G. Torrentera-Olivera ◽  
J. V. Velázquez-Morales ◽  
A. Correa-Calderón ◽  
...  
Keyword(s):  
Heat Stress ◽  
Carcass Characteristics ◽  
Basal Diet ◽  
Weather Conditions ◽  
Stress Conditions ◽  
Control Group ◽  
Hair Sheep ◽  
Feedlot Performance ◽  
Ewe Lambs ◽  
Zilpaterol Hydrochloride

The objective of the present study was to evaluate the effects of supplementation of zilpaterol hydrochloride (ZH) to the finishing diets on the feedlot performance and carcass characteristics of hair sheep ewe lambs during hot environmental conditions. Twenty Katahdin × Pelilbuey and Dorper × Pelibuey crossbred females with an average initial liveweight (LW) of 26.2 ± 0.83 kg were blocked by the initial LW, and assigned individually to 20 pens in a closed calf-rearing unit provided with fans. Treatments were (1) control group (basal diet without ZH) and (2) ZH group (basal diet plus 10 mg of ZH/ewe.day). Skin temperatures were measured each 2 days in five ewes by treatment; ambient weather conditions were recorded every day. After a 34-day feeding period, all ewes were slaughtered. Climatic variables during the study showed severe heat stress, with the average temperature–humidity index and temperature 85 units and 34.1°C, respectively. The skin temperature of belly and right flank was greater (P < 0.05) in ZH females than in control lambs. Ewe lambs fed ZH had feedlot performance, carcass length, shear force, body fat and skin percentage similar (P > 0.05) to control ewe lambs. With the exception of peritoneum and head (P < 0.05), all visceral organs had similar (P > 0.05) percentages between treatments. However, hot- and cool-carcass weights, dressing percentage, conformation and rib-eye area were greater (P < 0.05) for ewes supplemented with ZH. Likewise, the weight of hindquarter, legs and ribs expressed as a percentage of hot-carcass weight increased (P < 0.05) with ZH supplementation. Growth and deposition of excessive fat in hair-sheep ewe lambs were not improved with ZH supplementation under heat-stress conditions, whereas carcass-quality traits such as dressing and rib-eye area were increased.

Effects of zilpaterol hydrochloride and soybean oil supplementation on feedlot performance and carcass characteristics of hair-breed ram lambs under heat stress conditions

2014 ◽  
Vol 92 (3) ◽  
pp. 1184-1192 ◽  
Author(s):  
J. L. Dávila-Ramírez ◽  
U. Macías-Cruz ◽  
N. G. Torrentera-Olivera ◽  
H. González-Ríos ◽  
S. A. Soto-Navarro ◽  
...  
Keyword(s):  
Heat Stress ◽  
Soybean Oil ◽  
Carcass Characteristics ◽  
Stress Conditions ◽  
Feedlot Performance ◽  
Zilpaterol Hydrochloride ◽  
Ram Lambs

Impact of zilpaterol hydrochloride and soybean-oil supplementation on intramuscular fat, fatty acid profile and cholesterol concentration in the longissimus muscle of male hair lamb under moderate heat-stress conditions

2018 ◽  
Vol 58 (10) ◽  
pp. 1932 ◽  
Author(s):  
J. L. Dávila-Ramírez ◽  
L. Avendaño-Reyes ◽  
E. A. Peña-Ramos ◽  
T. Y. Islava-Lagarda ◽  
U. Macías-Cruz ◽  
...  
Keyword(s):  
Heat Stress ◽  
Fatty Acid ◽  
Soybean Oil ◽  
Negative Impact ◽  
Intramuscular Fat ◽  
Climatic Conditions ◽  
Stress Conditions ◽  
Cholesterol Concentration ◽  
Control Group ◽  
Zilpaterol Hydrochloride

Forty Dorper × Pelibuey crossbred male lambs (31.70 ± 2.30 kg, 4 months of age) were used to evaluate the effect of zilpaterol hydrochloride (ZH; 0 or 10 mg/lamb daily) and soybean-oil (SBO, 0 or 60 g/kg DM) supplementation on intramuscular fat, fatty acid (FA) profiles and cholesterol concentration of their meat. After 34 days, the animals were slaughtered, and their longissimus thoracis muscle was collected. The climatic conditions were of moderate heat stress (average temperature 35.7°C) during the study. Feedlot performance and carcass characteristics were not affected (P > 0.05) by ZH and SBO supplementation. The ZH treatment decreased the intramuscular fat content (by 30.4%), the amount of monounsaturated FA (by 3.5%) and the monounsaturated FA : saturated FA ratio (by 4.9%) compared with the control group. Supplementation with SBO decreased cis FA, C18:1 n-9c and C20:4 n-6, whereas the trans FA and cholesterol concentration increased. ZH use caused a decrease in body fat and intramuscular fat concentration. However, it caused a decrease in total monounsaturated fatty acids, which are among the healthiest fats in terms of the nutritional value of meat. Generally, principal changes in the lipid composition of hair lamb meat under heat-stress conditions were caused by SBO supplementation; however, they would have a minimal negative impact on human health.

Impact of sorting before feeding zilpaterol hydrochloride on feedlot performance and carcass characteristics of yearling steers1,2

2015 ◽  
Vol 93 (5) ◽  
pp. 2285-2296 ◽  
Author(s):  
F. H. Hilscher ◽  
E. M. Hussey ◽  
B. L. Nuttelman ◽  
D. B. Burken ◽  
W. A. Griffin ◽  
...  
Keyword(s):  
Carcass Characteristics ◽  
Feedlot Performance ◽  
Zilpaterol Hydrochloride

scholarly journals The potential value of seasonal forecasts in a changing climate in southern Africa

2014 ◽  
Vol 18 (4) ◽  
pp. 1525-1538 ◽  
Author(s):  
H. C. Winsemius ◽  
E. Dutra ◽  
F. A. Engelbrecht ◽  
E. Archer Van Garderen ◽  
F. Wetterhall ◽  
...  
Keyword(s):  
Climate Change ◽  
Heat Stress ◽  
Southern Africa ◽  
Weather Conditions ◽  
Stress Conditions ◽  
Mitigation Measures ◽  
Seasonal Forecasts ◽  
Weather Forecasts ◽  
Dry Spells ◽  
The Future

Abstract. Subsistence farming in southern Africa is vulnerable to extreme weather conditions. The yield of rain-fed agriculture depends largely on rainfall-related factors such as total seasonal rainfall, anomalous onsets and lengths of the rainy season and the frequency of occurrence of dry spells. Livestock, in turn, may be seriously impacted by climatic stress with, for example, exceptionally hot days, affecting condition, reproduction, vulnerability to pests and pathogens and, ultimately, morbidity and mortality. Climate change may affect the frequency and severity of extreme weather conditions, impacting on the success of subsistence farming. A potentially interesting adaptation measure comprises the timely forecasting and warning of such extreme events, combined with mitigation measures that allow farmers to prepare for the event occurring. This paper investigates how the frequency of extreme events may change in the future due to climate change over southern Africa and, in more detail, the Limpopo Basin using a set of climate change projections from several regional climate model downscalings based on an extreme climate scenario. Furthermore, the paper assesses the predictability of these indicators by seasonal meteorological forecasts of the European Centre for Medium-Range Weather Forecasts (ECMWF) seasonal forecasting system. The focus is on the frequency of dry spells as well as the frequency of heat stress conditions expressed in the temperature heat index. In areas where their frequency of occurrence increases in the future and predictability is found, seasonal forecasts will gain importance in the future, as they can more often lead to informed decision-making to implement mitigation measures. The multi-model climate projections suggest that the frequency of dry spells is not likely to increase substantially, whereas there is a clear and coherent signal among the models of an increase in the frequency of heat stress conditions by the end of the century. The skill analysis of the seasonal forecast system demonstrates that there is a potential to adapt to this change by utilizing the weather forecasts, given that both indicators can be skilfully predicted for the December–February season, at least 2 months ahead of the wet season. This is particularly the case for predicting above-normal and below-normal conditions. The frequency of heat stress conditions shows better predictability than the frequency of dry spells. Although results are promising for end users on the ground, forecasts alone are insufficient to ensure appropriate response. Sufficient support for appropriate measures must be in place, and forecasts must be communicated in a context-specific, accessible and understandable format.

Effects of zilpaterol hydrochloride on growth performance, carcass characteristics, and wholesale cut yield of hair-breed ewe lambs consuming feedlot diets under moderate environmental conditions

2011 ◽  
Vol 89 (12) ◽  
pp. 4188-4194 ◽  
Author(s):  
L. Avendaño-Reyes ◽  
U. Macías-Cruz ◽  
F. D. Álvarez-Valenzuela ◽  
E. Águila-Tepato ◽  
N. G. Torrentera-Olivera ◽  
...  
Keyword(s):  
Growth Performance ◽  
Environmental Conditions ◽  
Carcass Characteristics ◽  
Ewe Lambs ◽  
Zilpaterol Hydrochloride

Feedlot performance, carcass characteristics and meat quality of Nellore bulls and steers fed Zilpaterol hydrochloride

2019 ◽  
Vol 227 ◽  
pp. 166-174 ◽  
Author(s):  
C.F. Costa ◽  
A.L.C. Brichi ◽  
D.D. Millen ◽  
R.S. Goulart ◽  
I.C. Pereira ◽  
...  
Keyword(s):  
Meat Quality ◽  
Carcass Characteristics ◽  
Feedlot Performance ◽  
Zilpaterol Hydrochloride

Grape seed extract and chromium nicotinate reduce impacts of heat stress in Simmental × Qinchuan steers

2019 ◽  
Vol 59 (10) ◽  
pp. 1868
Author(s):  
Huiyuan Chen ◽  
Jifu Zhen ◽  
Zhaoliang Wu ◽  
Xiaomin Li ◽  
Shimin Liu ◽  
...  
Keyword(s):  
Heat Stress ◽  
Plasma Concentration ◽  
Basal Diet ◽  
Grape Seed Extract ◽  
Grape Seed ◽  
Interleukin 10 ◽  
Seed Extract ◽  
Stress Conditions ◽  
Positive Effects ◽  
Chromium Nicotinate

To assess the impacts of grape seed extract (GSE) fed with or without chromium nicotinate (CN) on beef steers under heat stress conditions, 40 Simmental × Qinchuan steers (400 ± 10 days old; 410 ± 8.0 kg) were randomly assigned to one of four diets (n = 10 per group): basal diet (CON group); basal diet + 33 mg/day CN (CN group); basal diet + 65 mg/kg DM GSE (GSE group); and basal diet + 33 mg/day CN + 65 mg/kg DM GSE (CN + GSE group). This study was conducted in summer and the steers were housed in outdoor shaded pens (10 steers/pen) and fed individually. The experiment lasted for 35 days, the first 7 days for diet and housing condition adaptation. The amount of feed intake was recorded daily; individual bodyweight was recorded on Days 8, 22, and 36. On Day 36 before feeding, six steers per group were slaughtered for collection of blood and tissue samples. Average daily liveweight gain and dry matter intake of steers were increased by the GSE, CN, and CN + GSE treatments (P &lt; 0.05). Dietary treatments increased the activities of glutathione peroxidase and total superoxide dismutase in plasma (P &lt; 0.05) and plasma concentration of interleukin 10 on Days 22 and 36 (P &lt; 0.05), whereas decreased plasma concentration of tumour necrosis factor-α on Day 22 (P &lt; 0.05). Overall, supplementation of GSE alone or with CN had positive effects on the growth performance of steers under heat stress conditions.

Feedlot performance and carcass traits of hairbreed ewe lambs in response to zilpaterol hydrochloride and soybean oil supplementation

2015 ◽  
Vol 93 (6) ◽  
pp. 3189-3196 ◽  
Author(s):  
J. L. Dávila-Ramírez ◽  
U. Macías-Cruz ◽  
N. G. Torrentera-Olivera ◽  
H. González-Ríos ◽  
E. A. Peña-Ramos ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Carcass Traits ◽  
Feedlot Performance ◽  
Ewe Lambs ◽  
Zilpaterol Hydrochloride
Sign in / Sign up

Export Citation Format

Share Document