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1. Feeding strategies impact animal growth and beef color and tenderness

Author:
Morales Gómez, Juan F.; Antonelo, Daniel S.; Beline, Mariane; Pavan, Bruna; Bambil, Danilo B.; Fantinato-Neto, Paulo; Saran-Netto, Arlindo; Leme, Paulo Roberto; Goulart, Rodrigo S.; Gerrard, David E.; Silva, Saulo L.
Source:
Meat science 2022 v.183 pp. 108599
ISSN:
0309-1740
Subject:
feedlots,   etc   ; Angus; Nellore; animal growth; backfat; beef; body weight; color; longissimus muscle; meat quality; pastures;     Show all 11 Subjects
Abstract:
... The impact of growth rate (GR) and finishing regime (FR) on growth and meat quality traits of Angus x Nellore crossbred steers, harvested at a constant body weight (530 ± 20 kg) or time on feed (140 days), was evaluated. Treatments were: 1) feedlot, high GR; 2) feedlot, low GR; 3) pasture, high GR and 4) pasture, low GR. Live body composition, carcass and meat quality traits were evaluated. High G ...
DOI:
10.1016/j.meatsci.2021.108599

2. Claw disorders as iceberg indicators of cattle welfare: Evidence-based on production system, severity, and associations with final muscle pH

Author:
Bautista-Fernández, M.; Estévez-Moreno, L.X.; Losada-Espinosa, N.; Villarroel, M.; María, G.A.; De Blas, I.; Miranda-de la Lama, G.C.
Source:
Meat science 2021 v.177 pp. 108496
ISSN:
0309-1740
Subject:
feedlots,   etc   ; ; cattle; claws; meat; meat science; muscles; pH; slaughter; slaughterhouses;     Show all 10 Subjects
Abstract:
... This study presents a novel approach to use claw disorders in cattle as a retrospective welfare indicator characterized at the abattoir. A total of 1040 cattle (2080 front and back left claws) were analyzed from 143 batches, originating from feedlots, free-range, and dairy systems. Our results indicate that abnormal claw shapes (>55%) and fissures of the claw wall (>25%) had the highest prevalence ...
DOI:
10.1016/j.meatsci.2021.108496

3. Effects backgrounding-finishing programs of different age/weight at harvest of feedlot steers

Author:
Pordomingo, Anibal J.; Pordomingo, Adriana B.
Source:
Meat science 2021 v.177 pp. 108493
ISSN:
0309-1740
Subject:
feedlots,   etc   ; fat thickness; feed conversion; intramuscular fat; longissimus muscle; meat;     Show all 6 Subjects
Abstract:
... Four ages at harvest (HA: A15, A18, A24 and A30 for 15, 18, 24 and 30 months, respectively) were compared in performance, carcass and meat traits of feedlot finished steers over a 123-day period. Three meat aging periods (postmortem days: 2, 7 and 14) were imposed on a longissimus thoracis muscle (LM) section of each left carcass. Feed efficiency (FE) was greater (P ≤ 0.02) for A15 and A18. Treatm ...
DOI:
10.1016/j.meatsci.2021.108493

4. Effects of supplementation of dried distillers grains with solubles to beef steers grazing Coastal bermudagrass on performance on pasture and in feedlot, and carcass characteristics

Author:
Smith, W.B.; Banta, J.P.; Foster, J.L.; Redmon, L.A.; Machado, T.J.; Tedeschi, L.O.; Rouquette, F.M.
Source:
Applied animal science 2021 v.37 no.2 pp. 155-165
ISSN:
2590-2865
Subject:
feedlots,   etc   ; Cynodon dactylon; beef; pastures; slaughter; stocker cattle; summer;     Show all 7 Subjects
Abstract:
... The objective of this study was to determine the influence of varying levels of dried distillers grains with solubles (DDGS) supplemented daily on the performance of beef stocker cattle grazing Coastal bermudagrass [Cynodon dactylon (L.) Pers.] pastures.Steers (n = 127, 342 ± 5.6 kg of BW) were stratified by BW and breed type and randomly allocated to 9 pastures (1.3±0.17 ha) during each summer of ...
DOI:
10.15232/aas.2020-02120

5. Feeding Algae Meal to Feedlot Lambs with Competent Reticular Groove Reflex Increases Omega-3 Fatty Acids in Meat

Author:
Gómez-Cortés, Pilar; de la Fuente, Miguel Angel; Peña Blanco, Francisco; Núñez-Sánchez, Nieves; Requena Domenech, Francisco; Martínez Marín, Andrés L.
Source:
Foods 2021 v.10 no.2
ISSN:
2304-8158
Subject:
feedlots,   etc   ; diet; dosage; intramuscular fat; lamb meat; milk replacer;     Show all 6 Subjects
Abstract:
... The aim of this study was to compare the effects of supplementing marine algae as a source of omega-3 fatty acids (FA) in the diet, mixed in the concentrate or bottle-fed, on intramuscular fat FA composition of lambs with competent reticular groove reflex (RGR). Forty-eight feedlot lambs were distributed in three equal groups: one group did not consume marine algae nor had competent RGR, the secon ...
DOI:
10.3390/foods10020366

6. Bovine respiratory disease during the mid-portion of the feeding period: Observations of frequency, timing, and population from the field

Author:
Theurer, Miles E.; Johnson, Myriah D.; Fox, Trent; McCarty, Travis M.; McCollum, Ryan M.; Jones, Tom M.; Alkire, Deke O.
Source:
Applied animal science 2021 v.37 no.1 pp. 52-58
ISSN:
2590-2865
Subject:
feedlots,   etc   ; bovine respiratory disease; macrolides; morbidity; research institutions; risk; Kansas;     Show all 7 Subjects
Abstract:
... The objective of this study is to provide observations related to bovine respiratory disease (BRD) in high-performing cattle during the mid-portion of the feeding period describing the occurrence, timing, and population.Data from a feedlot in Kansas were evaluated for temporal occurrence of BRD in high-performing and high-risk calves on a lot level. High-performing calves were categorized based on ...
DOI:
10.15232/aas.2020-02089

7. Veterinary antibiotics and estrogen hormones in manures from concentrated animal feedlots and their potential ecological risks

Author:
Li, Cheng; Li, Yang; Li, Xinyu; Ma, Xupu; Ru, Shuhua; Qiu, Tianlei; Lu, Anxiang
Source:
Environmental research 2021 v.198 pp. 110463
ISSN:
0013-9351
Subject:
feedlots,   etc   ; agricultural land; application rate; beef; chickens; estrogens; pollutants; relative risk; research; swine; toxicology; China;     Show all 12 Subjects
Abstract:
... The spread of pharmaceutically active chemicals (PACs), such as antibiotics and estrogenic hormones from animal manures can pose threats to the ecologic environment. In this work, animal manure samples were collected from 71 concentrated animal feedlots in Northern China and investigated for 24 antibiotics and 4 estrogenic hormones. Results showed that these micropollutants were ubiquitous in manu ...
DOI:
10.1016/j.envres.2020.110463

8. Does a single adjustment in the meat standards Australia beef grading model cater for different hormonal growth promotant formulations?

Author:
Packer, D.T.; McGilchrist, P.; Polkinghorne, R.J.; Ball, A.J.; Thompson, J.M.
Source:
Animal 2021 v.15 no.5 pp. 100196
ISSN:
1751-7311
Subject:
feedlots,   etc   ; beef; estradiol; flavor; genetic variation; juiciness; longissimus muscle; meat quality; models; pastures; prediction; trenbolone; Australia;     Show all 13 Subjects
Abstract:
... This paper investigated whether a single Hormonal Growth Promotant (HGP) adjustment in the Meat Standards Australia (MSA) beef grading model adequately predicted consumer eating quality of beef from cattle treated with different HGP formulations. This paper used consumer sensory data from two experiments. In experiment one, a total of 300 steers were allocated to three treatments; control (CON-100 ...
DOI:
10.1016/j.animal.2021.100196

9. The Influence of Environmental Conditions on Intake Behavior and Activity by Feedlot Steers Fed Corn or Barley-Based Diets

Author:
DelCurto-Wyffels, Hannah M.; Dafoe, Julia M.; Parsons, Cory T.; Boss, Darrin L.; DelCurto, Timothy; Wyffels, Samuel A.; Van Emon, Megan L.; Bowman, Janice G. P.
Source:
Animals 2021 v.11 no.5
ISSN:
2076-2615
Subject:
feedlots,   etc   ; ambient temperature; barley; beef cattle; cold; corn; diet; meteorological data; steers;     Show all 9 Subjects
Abstract:
... This study evaluated the influence of diet and environmental conditions on intake behavior and activity of feedlot steers. Feedlot rations used were comprised of a main concentrate: (1) corn or (2) barley. A GrowSafe system measured individual animal intake and behavior and HOBO accelerometers measured steer standing time. An Onset weather station collected on site weather data. Steer daily intake ...
DOI:
10.3390/ani11051261

10. Meat quality of young bulls finished in a feedlot and supplemented with clove or cinnamon essential oils

Author:
Torrecilhas, Juliana Akamine; Ornaghi, Mariana Garcia; Passetti, Rodrigo Augusto Cortez; Mottin, Camila; Guerrero, Ana; Ramos, Tatiane Rogelio; Vital, Ana Carolina Pelaes; Sañudo, Carlos; Malheiros, Euclides Braga; Prado, Ivanor Nunes do
Source:
Meat science 2021 v.174 pp. 108412
ISSN:
0309-1740
Subject:
feedlots,   etc   ; cinnamon; cloves; color; consumer acceptance; crossbreds; diet; essential oils; lipid peroxidation; meat; meat quality; pH;     Show all 12 Subjects
Abstract:
... Forty young crossbred bulls (10 ± 2.2 months of age; 219 ± 11.7 kg) were finished in a feedlot with one of five different treatments: CON, control (no essential oil); CLO450, clove essential oil (450 mg/kg); CLO880, clove essential oil (880 mg/kg); CIN450; cinnamon essential oil (450 mg/kg); and CIN880, cinnamon essential oil (880 mg/kg). Instrumental meat quality attributes and consumer acceptabi ...
DOI:
10.1016/j.meatsci.2020.108412

11. Corn versus Barley in Finishing Diets: Effect on Steer Performance and Feeding Behavior

Author:
DelCurto-Wyffels, Hannah M.; Dafoe, Julia M.; Parsons, Cory T.; Boss, Darrin L.; DelCurto, Timothy; Wyffels, Samuel A.; Van Emon, Megan L.; Bowman, Janice G. P.
Source:
Animals 2021 v.11 no.4
ISSN:
2076-2615
Subject:
feedlots,   etc   ; average daily gain; barley; beef cattle; body weight; corn; steers; weight gain;     Show all 8 Subjects
Abstract:
... This study evaluated the effects of barley and corn finishing rations on feedlot performance and behavior of steers. Feedlot rations in this study were comprised of a main concentrate of either corn or barley. Steers were fed in a GrowSafe system to measure individual animal intake and behavior. Weight gain, average daily gain (ADG), and gain:feed were measured for each steer. Feeding behavior inc ...
DOI:
10.3390/ani11040935

12. Histochemical Characterisation and Gene Expression Analysis of Skeletal Muscles from Maremmana and Aubrac Steers Reared on Grazing and Feedlot Systems

Author:
Foggi, Giulia; Ciucci, Francesca; Conte, Maria; Casarosa, Laura; Serra, Andrea; Giannessi, Elisabetta; Lenzi, Carla; Salvioli, Stefano; Conte, Giuseppe; Mele, Marcello
Source:
Animals 2021 v.11 no.3
ISSN:
2076-2615
Subject:
feedlots,   etc   ; RNA; gene expression; genes; muscle fibers; muscles; physical activity; semimembranosus muscle;     Show all 8 Subjects
Abstract:
... This study aimed to characterise the fibre composition of Triceps brachii (TB) and Semimembranosus (SM) muscles from 20 Maremmana (MA) and 20 Aubrac (AU) steers, and the effect of grazing activity in comparison with feedlot system. The histochemical method was performed with the m-ATPase method with an acid pre-incubation, thus allowing to distinguish type I, IIA, and IIB fibres. Additionally, on ...
DOI:
10.3390/ani11030656

13. Hourly activity patterns and behaviour-based management of feedlot steers with and without a cattle brush

Author:
Meneses, Xandra Christine A.; Park, Rachel M.; Ridge, Emily E.; Daigle, Courtney L.
Source:
Applied animal behaviour science 2021 v.236 pp. 105241
ISSN:
0168-1591
Subject:
feedlots,   etc   ; crossbreds; environmental enrichment; grooming (animal behavior); statistical models; steers; tongue; Texas;     Show all 8 Subjects
Abstract:
... Environmental enrichment (EE) can increase the environmental complexity of feedlots by providing mental and physical stimulation. The objectives of the study were to 1) identify hourly patterns of feedlot steer behaviour and 2) evaluate the impact of EE on these behavioural patterns. Predominantly British and British continental crossbred steers (n = 54) were shipped to Texas A&M AgriLife Feedlot ...
DOI:
10.1016/j.applanim.2021.105241

14. Modeling the Effect of Tylosin Phosphate on Macrolide-Resistant Enterococci in Feedlots and Reducing Resistance Transmission

Author:
Stapleton, Gregory Sean; Cazer, Casey L.; Gröhn, Yrjö T.
Source:
Foodborne pathogens & disease 2021 v.18 no.2 pp. 85-96
ISSN:
1556-7125
Subject:
feedlots,   etc   ; Enterococcus; beef cattle; large intestine; liver; mathematical models; pharmacodynamics; pharmacokinetics; phosphates; risk; tylosin; water troughs;     Show all 12 Subjects
Abstract:
... Tylosin phosphate (TYL) is administered to more than 50% of U.S. beef cattle to reduce the incidence of liver abscesses but may increase the risk of macrolide–lincosamide–streptogramin-resistant bacteria disseminating from the feedlot. Limited evidence has been collected to understand how TYL affects the proportion of resistant bacteria in cattle or the feedlot environment. We created a mathematic ...
DOI:
10.1089/fpd.2020.2835

15. Bovine respiratory disease during the mid-portion of the feeding period: Observations from vaccination history, viral and bacterial prevalence, and rate of gain in feedlot cattle

Author:
Theurer, Miles E.; Johnson, Myriah D.; Fox, Trent; McCarty, Travis M.; McCollum, Ryan M.; Jones, Tom M.; Alkire, Deke O.
Source:
Applied animal science 2021 v.37 no.1 pp. 59-67
ISSN:
2590-2865
Subject:
feedlots,   etc   ; Haemophilus somni; Mannheimia haemolytica; bovine respiratory disease; cattle; morbidity; nasal cavity; pathogens; vaccination; vaccines;     Show all 10 Subjects
Abstract:
... The objective of this research was to provide preliminary observations related to bovine respiratory disease (BRD) morbidity in high-performing cattle related to cow-calf operations, number of vaccines received before the feedlot, viral and bacterial presence in the nasal cavity during the mid-feeding period, and rate of gain related to incidence of BRD.Health outcomes were evaluated from 4,346 ca ...
DOI:
10.15232/aas.2020-02090

16. Carcass characteristics and meat quality of feedlot goat kids fed high-concentrate diets with licury cake

Author:
Silva, Willian P.; Santos, Stefanie A.; Cirne, Luís G.A.; Pina, Douglas dos S.; Alba, Henry D.R.; Rodrigues, Thomaz C.G.C.; Araújo, Maria L.G.M.L.; Lima, Victor G.O.; Galvão, Jocasta M.; Nascimento, Camila O.; Rodrigues, Carlindo S.; de Carvalho, Gleidson G.P.
Source:
Livestock science 2021 v.244 pp. 104391
ISSN:
1871-1413
Subject:
feedlots,   etc   ; cakes; carcass weight; cold; crossbreds; crude protein; meat; meat quality; shear stress; slaughter weight;     Show all 10 Subjects
Abstract:
... This study aimed to evaluate the carcass characteristics and meat quality of feedlot goat kids fed high-concentrate diets with licury cake. Forty crossbreed non-castrated Boer × mixed breed goat kids with an average age of 4 months and an initial average body weight of 20.15 ± 2.79 kg were randomly distributed in a completely randomized design with four experimental diets containing licury cake at ...
DOI:
10.1016/j.livsci.2020.104391

17. Ractopamine and Other Growth-Promoting Compounds in Beef Cattle Operations: Fate and Transport in Feedlot Pens and Adjacent Environments

Author:
Challis, J. K.; Sura, S.; Cantin, J.; Curtis, A. W.; Shade, K. M.; McAllister, T. A.; Jones, P. D.; Giesy, J. P.; Larney, F. J.
Source:
Environmental science & technology 2021 v.55 no.3 pp. 1730-1739
ISSN:
1520-5851
Subject:
feedlots,   etc   ; agonists; beef cattle; feces; melengestrol; metabolites; particulates; pastures; ractopamine; rain; rainfall simulation; runoff; technology; trenbolone;     Show all 14 Subjects
Abstract:
... The current study represents a comprehensive investigation of the occurrence and fates of trenbolone acetate (TBA) and metabolites 17α-trenbolone (17α-TBOH), 17β-TBOH, and trendione (TBO); melengesterol acetate (MGA); and the less commonly studied β-andrenergic agonist ractopamine (RAC) in two 8 month cattle feeding trials and simulated rainfall runoff experiments. Cattle were administered TBA, MG ...
DOI:
10.1021/acs.est.0c06450

18. Evolution of the Seroprevalence of Pestivirus and Respiratory Viral Infections in Spanish Feedlot Lambs

Author:
Navarro, Teresa; Ortín, Aurora; Cabezón, Oscar; De Las Heras, Marcelo; Lacasta, Delia; González, José María
Source:
Animals 2021 v.11 no.1
ISSN:
2076-2615
Subject:
feedlots,   etc   ; ; Bovine alphaherpesvirus 1; Bovine orthopneumovirus; Bovine respirovirus 3; Pestivirus; evolution; observational studies; seroconversion; seroprevalence; surveys;     Show all 11 Subjects
Abstract:
... The presence of respiratory viruses and pestiviruses in sheep has been widely demonstrated, and their ability to cause injury and predispose to respiratory processes have been proven experimentally. A longitudinal observational study was performed to determine the seroprevalence of bovine parainfluenza virus type 3 (BPIV-3), bovine respiratory syncytial virus (BRSV), bovine herpesvirus type 1 (BHV ...
DOI:
10.3390/ani11010160

19. Does the Effect of Replacing Cottonseed Meal with Dried Distiller’s Grains on Nellore Bulls Finishing Phase Vary between Pasture and Feedlot?

Author:
Hoffmann, Alvair; Berça, Andressa Scholz; Cardoso, Abmael da Silva; Fonseca, Natalia Vilas Boas; Silva, Maria Luísa Curvelo; Leite, Rhaony Gonçalves; Ruggieri, Ana Cláudia; Reis, Ricardo Andrade
Source:
Animals 2021 v.11 no.1
ISSN:
2076-2615
Subject:
feedlots,   etc   ; Nellore; animal performance; beef cattle; body weight; cottonseed meal; digestibility; pastures; protein sources; tropics;     Show all 10 Subjects
Abstract:
... The study aimed to evaluate the effect of replacing cottonseed meal by dried distiller’s grains (DDG) in terms of efficiency in the productive aspects of beef cattle finishing in pasture versus feedlot. The experiment was conducted in a completely randomized design in a 2 × 3 factorial arrangement, with two production systems (pasture versus feedlot) and three supplements: CM, conventional supplem ...
DOI:
10.3390/ani11010085

20. Fatigue and the Need for Recovery among Latino/a Immigrant Cattle Feedyard Workers

Author:
Ramos, Athena K.; McGinley, Meredith; Carlo, Gustavo
Source:
Journal of agromedicine 2021 v.26 no.1 pp. 47-58
ISSN:
1545-0813
Subject:
feedlots,   etc   ; Latinos; agromedicine; beef cattle; cattle feeding; educational status; females; latitude; markets; models; pain; risk reduction;     Show all 12 Subjects
Abstract:
... Cattle feedyards are animal feeding operations where beef cattle are finished to market weight on grain. Cattle feeding can be dirty, demanding, and dangerous work. This study sought to assess the predictors of fatigue and the need for recovery among Latino/a immigrant cattle feedyard workers in the United States. A path model was examined to explore direct and indirect relations among physical fa ...
DOI:
10.1080/1059924X.2020.1845894