Effect of dietary cimaterol on performance and carcass traits in bulls and on aspects of digestion in cattle and sheep

Fiems, LO; Boucque, CV; Cottyn, B. G.; Voorde, Geertrui Van de

doi:10.1051/animres:19910306

Cited by 9 publications

(5 citation statements)

References 13 publications

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“…In these experiments, RH affects microbial populations, stimulates fermentation of microorganisms in the rumen, and increased dry matter disappearance. Fiems et al (1991) reported that, other than a decrease for crude fiber, nutrient digestibility coefficients were not affected in cimaterol-treated sheep; however, rumen fluid contained significantly higher levels of acetic and propionic acids and lower levels of butyric acid when compared to diet without cimaterol. However, in line with results of present study, Strydom et al (2009) reported that feedlot steers administrated with ZH (6 ppm), RH (30 ppm) or clenbuterol (2 ppm) digested similar amounts of DM or CP.…”

Section: Digestibility Coefficientsmentioning

confidence: 95%

Effect of ractopamine hydrochloride and zilpaterol hydrochloride on growth, diet digestibility, intake and carcass characteristics of feedlot lambs

et al. 2010

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Section: Digestibility Coefficientsmentioning

confidence: 95%

Effect of ractopamine hydrochloride and zilpaterol hydrochloride on growth, diet digestibility, intake and carcass characteristics of feedlot lambs

et al. 2010

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“…These results are consistent with previous studies (Fitzsimons et al 1987;Moloney et al 1991;Sinclair et al 1991) and with the summary of Mersmann (1998) that BAA increased growth rate, feed conversion efficiency and feed intake in sheep by 15%, 15% and 2%, respectively. The increases in growth rate and efficiency of feed utilization may be associated with a hypertrophic and nutrient repartitioning effect of BAA (Mersmann 1998), because increase in feed intake was not pronounced and digestibility tended to decrease (Chikhou et al 1991;Fiems et al 1991). The hypertrophic effect of BAA has been shown to result in an increase in muscle mass by stimulating protein synthesis and reducing protein degradation Mersmann 1995Mersmann , 1998Chwalibog et al 1996).…”

Section: Growth Rate and Feed Efficiencymentioning

confidence: 99%

Effects of a beta-adrenergic agonist (L-644,969) on performance and carcass traits of growing lambs in a cold environment

Li¹,

Christopherson²,

Li³

et al. 2000

Can. J. Anim. Sci.

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. 2000. Effects of a beta-adrenergic agonist (L-644,969) on performance and carcass traits of growing lambs in a cold environment. Can. J. Anim. Sci. 80: 459-465. A 2 × 2 factorial experiment was conducted to study the effects of the beta-adrenergic agonist L-644,969 (BAA, supplied at 0.28 vs. 0 mg kg -0.75 d -1 ) on growth performance, carcass traits and nitrogen balance of lambs at two environmental temperatures (0°C vs. 20°C). Sixteen Suffolk-Cross wether lambs (30.2 ± 2.06 kg BW) were randomly divided into four groups and exposed to each of four experimental treatments (20°C with control diet; 20°C with BAA-supplemented diet; 0°C with control diet; and 0°C with BAA-supplemented diet) for 5 wk. The collection period for nitrogen balance was 4 d during the 4th week of treatment. The low temperature decreased efficiency of feed utilization and increased backfat thickness by 20.8% (P < 0.01) and 35.1% (P < 0.05), respectively. L-644,969, on the other hand, increased daily gain, feed efficiency and hot carcass weight by 22.5% (P < 0.05), 17.2% (P < 0.05) and 9.6% (P < 0.05,) respectively. Dressing percentage (P < 0.01), biceps femoris weight (P < 0.01) and rib eye area (P < 0.01) were also increased, but abdominal fat expressed as a percentage of liveweight (P < 0.05) was significantly decreased by BAA treatment. The improved weight gain, muscle weight and ribeye area in response to BAA, and in the absence of an increase in total nitrogen retention, indicate that the responses are due to nutrient repartitioning. Temperature did not impair the nutrient repartitioning effect of BAA, but feed efficiency may be more improved by BAA for the animals in the cold environment. . D'autre part, le β-agoniste augmentait le GMQ, la valorisation des aliments et le poids de carcasse chaude, soit respectivement de 22,5, 17,2 et 9,6 %, tous trois significativement au seuil de P < 0,05. Une augmentation (P < 0,01) était également observée pour le rendement de carcasse, le poids du biceps femoris et la surface de la noix de côte ainsi qu'une diminution (P < 0,05) de la graisse abdominale en pourcentage du poids vif. L'amélioration du gain de poids, du poids musculaire et de la surface de la noix de côte causé par le β-agoniste ainsi que l'absence de tout accroissement de la rétention de N total portent à conclure que ces effets sont dus à une modification de la répartition des nutriments, effet qui ne semble pas avoir été inhibé par la température d'ambiance. Par ailleurs, le gain d'efficacité alimentaire attribuable au BAA serait plus prononcé dans le milieu froid.Mots clés: Performances, caractères de carcasse, β-agoniste, température, agneaux Ruminant animals including cattle and sheep often grow more slowly and have reduced efficiency of feed utilization in winter. The reduced efficiency has been attributed to limited intake, low digestibility, high maintenance requirement and the change of composition of liveweight gain (Christopherson and Kennedy 1983;Delfino and Mathison 1991;Webster et al. 1997

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“…Hypothetically it may be possible that ß-agonists could influence digestibility of protein and by reducing N-excretion in faeces increase protein retention. Nitrogen loss in faeces was non-significantly reduced by ß-agonist treatment in sheep (Kim et al, 1989 andNash et ah, 1990), while Fiems et al (1991) measured an unexplained reduction of protein digestibility in bulls. However, it does not appear that these marginal variations of digestibility can be attributed to the effect of ß-agonists, but rather to an individual variation between animals.…”

Section: Discussionmentioning

confidence: 99%

Quantitative protein and fat metabolism in bull calves treated with ß‐adrenergic agonist

Chwalibog

Jensen

Thorbek

1996

Archiv für Tierernaehrung

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Protein and energy utilization and quantitative retention of protein, fat and energy was investigated with 12 Red Danish bulls during two subsequent 6 weeks trials (Sections A and B) at a mean live weight of 195 and 335 kg respectively. Treatments were control (Group 1) and beta-agonist (L-644,969) treated animals (Group 2 and 3). Beta-agonist supplementation was 5 and 10 mg/d in Group 2 and 3 respectively in Section A and 10 and 20 mg/d in Section B. Measurements were performed by means of nitrogen and carbon balances and with use of indirect calorimetry. In each section the mean intake of dry matter, metabolizable energy and digestible protein was of the same magnitude for all groups. The beta-agonist had no significant effect on protein digestibility and metabolizability of energy, but daily live weight gain was significantly higher in the treated bulls. The utilization of digested protein was strongly influenced by treatment, with the highest values for Group 2 in both sections. The protein retention increased with 25% in Group 2, with the highest increment of 113 g/d in Section B. The fat retention decreased in treated animals, most pronounced in Group 3, where the reduction was about 50% with a mean decrease of 145 g/d in Section B. The total energy retention was not different between control animals and Group 2 in both sections, but there was a shift in energy retention from fat to protein. The higher levels of beta-agonist used in Group 3 generated the same increase in protein retention, but fat retention was markedly lower and consequently the total energy retention was reduced.

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Effect of dietary cimaterol on performance and carcass traits in bulls and on aspects of digestion in cattle and sheep

Cited by 9 publications

References 13 publications

Effect of ractopamine hydrochloride and zilpaterol hydrochloride on growth, diet digestibility, intake and carcass characteristics of feedlot lambs

Effect of ractopamine hydrochloride and zilpaterol hydrochloride on growth, diet digestibility, intake and carcass characteristics of feedlot lambs

Effects of a beta-adrenergic agonist (L-644,969) on performance and carcass traits of growing lambs in a cold environment

Quantitative protein and fat metabolism in bull calves treated with ß‐adrenergic agonist

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