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Patinho I, Antonelo DS, Delgado EF, Alessandroni L, Balieiro JCC, Contreras Castillo CJ, Gagaoua M. In-depth exploration of the high and normal pH beef proteome: First insights emphasizing the dynamic protein changes in Longissimus thoracis muscle from pasture-finished Nellore bulls over different postmortem times. Meat Sci 2024; 216:109557. [PMID: 38852285 DOI: 10.1016/j.meatsci.2024.109557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/25/2024] [Accepted: 06/03/2024] [Indexed: 06/11/2024]
Abstract
This study aimed to evaluate for the first time the temporal dynamic changes in early postmortem proteome of normal and high ultimate pH (pHu) beef samples from the same cattle using a shotgun proteomics approach. Ten selected carcasses classified as normal (pHu < 5.8; n = 5) or high (pHu ≥ 6.2; n = 5) pHu beef from pasture-finished Nellore (Bos taurus indicus) bulls were sampled from Longissimus thoracis muscle at 30 min, 9 h and 44 h postmortem for proteome comparison. The temporal proteomics profiling quantified 863 proteins, from which 251 were differentially abundant (DAPs) between high and normal pHu at 30 min (n = 33), 9 h (n = 181) and 44 h (n = 37). Among the myriad interconnected pathways regulating pH decline during postmortem metabolism, this study revealed the pivotal role of energy metabolism, cellular response to stress, oxidoreductase activity and muscle system process pathways throughout the early postmortem. Twenty-three proteins overlap among postmortem times and may be suggested as candidate biomarkers to the dark-cutting condition development. The study further evidenced for the first time the central role of ribosomal proteins and histones in the first minutes after animal bleeding. Moreover, this study revealed the disparity in the mechanisms underpinning the development of dark-cutting beef condition among postmortem times, emphasizing multiple dynamic changes in the muscle proteome. Therefore, this study revealed important insights regarding the temporal dynamic changes that occur in early postmortem of high and normal muscle pHu beef, proposing specific pathways to determine the biological mechanisms behind dark-cutting determination.
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Affiliation(s)
- Iliani Patinho
- Department of Agri-food Industry, Food and Nutrition, Luiz de Queiroz College of Agriculture, University of Sao Paulo, Piracicaba, SP 13418-900, Brazil
| | - Daniel S Antonelo
- College of Veterinary Medicine and Animal Science, University of Sao Paulo, Pirassununga, SP 13635-900, Brazil
| | - Eduardo F Delgado
- Department of Animal Science, Luiz de Queiroz College of Agriculture, University of Sao Paulo, Piracicaba, SP 13418-900, Brazil
| | - Laura Alessandroni
- Chemistry Interdisciplinary Project (CHIP), School of Pharmacy, University of Camerino, Via Madonna delle Carceri, Camerino 62032, Italy
| | - Júlio C C Balieiro
- College of Veterinary Medicine and Animal Science, University of Sao Paulo, Pirassununga, SP 13635-900, Brazil
| | - Carmen J Contreras Castillo
- Department of Agri-food Industry, Food and Nutrition, Luiz de Queiroz College of Agriculture, University of Sao Paulo, Piracicaba, SP 13418-900, Brazil
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Kostova V, Hanke D, Kaspar H, Fiedler S, Schwarz S, Krüger-Haker H. Macrolide resistance in Mannheimia haemolytica isolates associated with bovine respiratory disease from the German national resistance monitoring program GE RM-Vet 2009 to 2020. Front Microbiol 2024; 15:1356208. [PMID: 38495516 PMCID: PMC10940430 DOI: 10.3389/fmicb.2024.1356208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/13/2024] [Indexed: 03/19/2024] Open
Abstract
Data collected from the German national resistance monitoring program GERM-Vet showed slowly increasing prevalence of macrolide resistance among bovine respiratory disease (BRD)-associated Pasteurellacae from cattle over the last decade. The focus of this study was to analyze the genetic basis of antimicrobial resistance (AMR) and the prevalence of multidrug-resistance (MDR)-mediating integrative and conjugative elements (ICEs) in 13 German BRD-associated Mannheimia haemolytica isolates collected between 2009 and 2020 via whole-genome sequencing. Antimicrobial susceptibility testing (AST) was performed via broth microdilution according to the recommendations of the Clinical and Laboratory Standards Institute for the macrolides erythromycin, tilmicosin, tulathromycin, gamithromycin, tildipirosin, and tylosin as well as 25 other antimicrobial agents. All isolates either had elevated MICs or were resistant to at least one of the macrolides tested. Analysis of whole-genome sequences obtained by hybrid assembly of Illumina MiSeq and Oxford Nanopore MinION reads revealed the presence of seven novel Tn7406-like ICEs, designated Tn7694, and Tn7724- Tn7729. These ICEs harbored the antimicrobial resistance genes erm(T), mef (C), mph(G), floR, catA3, aad(3")(9), aph(3')-Ia, aac(3)-IIa, strA, strB, tet(Y), and sul2 in different combinations. In addition, mutational changes conferring resistance to macrolides, nalidixic acid or streptomycin, respectively, were detected among the M. haemolytica isolates. In addition, four isolates carried a 4,613-bp plasmid with the β-lactamase gene blaROB - 1. The detection of the macrolide resistance genes erm(T), mef (C), and mph(G) together with other resistance genes on MDR-mediating ICEs in bovine M. haemolytica may explain the occurrence of therapeutic failure when treating BRD with regularly used antimicrobial agents, such as phenicols, penicillins, tetracyclines, or macrolides. Finally, pathogen identification and subsequent AST is essential to ensure the efficacy of the antimicrobial agents applied to control BRD in cattle.
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Affiliation(s)
- Valeria Kostova
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Dennis Hanke
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Heike Kaspar
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Stefan Fiedler
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Henrike Krüger-Haker
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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da Silva Rodrigues Mendes N, Rodrigues Silva R, Ferreira de Oliveira T, Ellies-Oury MP, Hocquette JF, Chriki S. Does transport stress have any effect on carcass quality of Nellore cattle ( Bos taurus indicus) in Brazil? - A case study. Transl Anim Sci 2023; 8:txad134. [PMID: 38737522 PMCID: PMC11087730 DOI: 10.1093/tas/txad134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 12/07/2023] [Indexed: 05/14/2024] Open
Abstract
With the increasing concomitant demands for Brazilian beef and in particular high-quality beef, there is a need for observational studies of the effects of pre- and post-slaughter practices on beef carcass traits. We hypothesized in our case study that pre-slaughter transport of bovines over significant distances would induce stress in animals, and that this would reduce carcass quality because of higher pH resulting from long-distance transportation. To test this hypothesis, 30,230 Nellore carcasses from a private slaughterhouse were evaluated 24 h postmortem. Analysis showed correlations between animal maturity, ultimate pH, distance, and carcass weight. More precisely, there was a slight positive correlation between ultimate pH and weight (but not with transportation distance) and a slight positive correlation between maturity and weight. A linear regression model (R2 = 0.016) failed to show distance having a significant effect on ultimate pH (P = 0.63), while carcass weight significantly affected ultimate pH (P < 0.001) with a low coefficient of 0.0003. Maturity negatively affected ultimate pH also (P < 0.001) but with also a small effect (-0.0008). Results (from 95% confidence intervals of variance of the random effects and of the random errors) showed that the variability within farms was higher than between farms. The linear mixed model showed that maturity had a significant effect on carcass weight value (P < 0.001) with a large coefficient of 2.90. The R2 of the linear mixed model was 46.03%. In conclusion, while weight and maturity both affect ultimate pH, long distances did not significantly impact ultimate pH and therefore the beef quality from Nellore cattle. This could be because of low stress during transport, as well as the physical characteristics of the Nellore breed that favor greater resistance to tropical climatic conditions.
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Affiliation(s)
- Nathalia da Silva Rodrigues Mendes
- Department of Food Science and Technology, School of Agronomy, Federal University of Goiás-UFG, Campus Samambaia, CEP 74690-900, Goiânia, Brazil
- Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Clermont Auvergne, VetAgro Sup, UMR Herbivores, UMR1213, Recherches sur les Herbivores, Theix, 63122 Saint-Genès Champanelle, France
| | - Renato Rodrigues Silva
- Department of Institute of Mathematics and Statistics, Federal University of Goiás, Goiânia, Brazil
| | - Tatianne Ferreira de Oliveira
- Department of Food Science and Technology, School of Agronomy, Federal University of Goiás-UFG, Campus Samambaia, CEP 74690-900, Goiânia, Brazil
| | - Marie-Pierre Ellies-Oury
- Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Clermont Auvergne, VetAgro Sup, UMR Herbivores, UMR1213, Recherches sur les Herbivores, Theix, 63122 Saint-Genès Champanelle, France
- Department of Feed and Food, Bordeaux Sciences Agro, CS 40201, 33175 Gradignan, France
| | - Jean-François Hocquette
- Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Clermont Auvergne, VetAgro Sup, UMR Herbivores, UMR1213, Recherches sur les Herbivores, Theix, 63122 Saint-Genès Champanelle, France
| | - Sghaier Chriki
- Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Clermont Auvergne, VetAgro Sup, UMR Herbivores, UMR1213, Recherches sur les Herbivores, Theix, 63122 Saint-Genès Champanelle, France
- ISARA, CEDEX 07, 69364 Lyon, France
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Ferreira IM, Oliveira KA, Cidrini IA, de Abreu MJI, Sousa LM, Batista LHC, Homem BGC, Prados LF, Siqueira GR, Resende FDD. Performance, Intake, Feed Efficiency, and Carcass Characteristics of Young Nellore Heifers under Different Days on Feed in the Feedlot. Animals (Basel) 2023; 13:2238. [PMID: 37444036 DOI: 10.3390/ani13132238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/14/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
Two studies evaluated the productive characteristics of young Nellore heifers receiving different days on feed (DOF) to determine the biological slaughter endpoint. In Experiment 1 (Exp. 1), fifty-one Nellore heifers [324 ± 19.3 kg of body weight (BW); 16 ± 1 months] were split into three DOF lengths (45, 75, or 105 days), while in Experiment 2 (Exp. 2), thirty-six Nellore heifers (362 ± 25.5 kg of BW; 18 ± 1 months of age) were split into three DOF lengths (45, 90, or 135 days). In both studies, all animals were distributed in complete randomized blocks according to initial BW and stratified via carcass ultrasound. The diet was supplied ad libitum, allowing 3% of refusals. The point at which the animals achieved 25% of ether extract of shrunk body weight (EESBW) was defined as the biological endpoint. Thus, relationships were made between some characteristics obtained in both studies. Positive linear relationships were found between backfat thickness (BFT) vs. EESBW (p < 0.001, r = 0.84) and BFT vs. body weight (p < 0.001, r = 0.77). Our results suggest that the biological slaughter endpoint for young Nellore heifers is 6.97 mm of backfat thickness or 402 kg shrunk body weight, corresponding to around 75 DOF.
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Affiliation(s)
- Igor Machado Ferreira
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | - Karla Alves Oliveira
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | - Iorrano Andrade Cidrini
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | - Mateus José Inácio de Abreu
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | - Luciana Melo Sousa
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | - Luis Henrique Cursino Batista
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
| | | | - Laura Franco Prados
- Agência Paulista de Tecnologia dos Agronegócios (APTA), Colina 14770-000, São Paulo, Brazil
| | - Gustavo Rezende Siqueira
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
- Agência Paulista de Tecnologia dos Agronegócios (APTA), Colina 14770-000, São Paulo, Brazil
| | - Flávio Dutra de Resende
- Departament of Animal Science, Faculty of Agricultural and Veterinary Science, São Paulo State University (UNESP), Jaboticabal 14884-900, São Paulo, Brazil
- Agência Paulista de Tecnologia dos Agronegócios (APTA), Colina 14770-000, São Paulo, Brazil
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Santiago B, Baldassini W, Neto OM, Chardulo LA, Torres R, Pereira G, Curi R, Chiaratti MR, Padilha P, Alessandroni L, Gagaoua M. Post-mortem muscle proteome of crossbred bulls and steers: Relationships with carcass and meat quality. J Proteomics 2023; 278:104871. [PMID: 36898612 DOI: 10.1016/j.jprot.2023.104871] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/12/2023]
Abstract
This study investigated the skeletal muscle proteome of crossbred bulls and steers with the aim of explaining the differences in carcass and meat quality traits. Therefore, 640 post-weaning Angus-Nellore calves were fed a high-energy diet for a period of 180 days. In the feedlot trial, comparisons of steers (n = 320) and bulls (n = 320) showed lower (P < 0.01) average daily gain (1.38 vs. 1.60 ± 0.05 kg/d), final body weight (547.4 vs. 585.1 ± 9.3 kg), which resulted in lower hot carcass weight (298.4 vs. 333.7 ± 7.7 kg) and ribeye area (68.6 vs. 81.0 ± 2.56 cm2). Steers had higher (P < 0.01) carcass fatness, meat color parameters (L*, a*, b*, chroma (C*), hue (h°)) and lower ultimate pH. Moreover, lower (P < 0.01) Warner-Bratzler shear force (WBSF) were observed in steers compared to bulls (WBSF = 3.68 vs. 4.97 ± 0.08 kg; and 3.19 vs. 4.08 ± 0.08 kg). The proteomic approach using two-dimensional electrophoresis, mass spectrometry and bioinformatics procedures revealed several differentially expressed proteins between steers and bulls (P < 0.05). Interconnected pathways and substantial changes were revealed in biological processes, molecular functions, and cellular components between the post-mortem muscle proteomes of the compared animals. Steers had increased (P < 0.05) abundance of proteins related to energy metabolism (CKM, ALDOA, and GAPDH), and bulls had greater abundance of proteins associated with catabolic (glycolysis) processes (PGM1); oxidative stress (HSP60, HSPA8 and GSTP1); and muscle structure and contraction (TNNI2 and TNNT3). The better carcass (fatness and marbling degree) and meat quality traits (tenderness and color parameters) of steers were associated with higher abundance of key proteins of energy metabolism and lower abundance of enzymes related to catabolic processes, oxidative stress, and proteins of muscle contraction SIGNIFICANCE: Sexual condition of cattle is known to be an important factor affecting animal performances and growth as well as the carcass and meat quality traits. The investigation of skeletal muscle proteome help a better understanding of the origin of the differences in quality traits between bulls and steers. The inferior meat quality of bulls was found to be due to the greater expression of proteins associated with primary and catabolic processes, oxidative stress, and muscle contraction. Steers had greater expression of proteins, from which several are known biomarkers of beef quality (mainly tenderness).
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Affiliation(s)
- Bismarck Santiago
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil
| | - Welder Baldassini
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), 18618-681 Botucatu, São Paulo, Brazil.
| | - Otávio Machado Neto
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), 18618-681 Botucatu, São Paulo, Brazil.
| | - Luis Artur Chardulo
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), 18618-681 Botucatu, São Paulo, Brazil
| | - Rodrigo Torres
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil
| | - Guilherme Pereira
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), 18618-681 Botucatu, São Paulo, Brazil
| | - Rogério Curi
- School of Agriculture and Veterinary Sciences (FCAV), São Paulo State University (UNESP), 14884-900 Jaboticabal, São Paulo, Brazil; School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), 18618-681 Botucatu, São Paulo, Brazil
| | - Marcos Roberto Chiaratti
- Universidade Federal de São Carlos (UFSCar), Departamento de Genética e Evolução, 13565-905 São Carlos, São Paulo, Brazil
| | - Pedro Padilha
- Institute of Bioscience (IB), São Paulo State University (UNESP), Departamento de Química e Bioquímica, 18618-689 Botucatu, São Paulo, Brazil
| | - Laura Alessandroni
- Chemistry Interdisciplinary Project (CHIP), School of Pharmacy, University of Camerino, Via Madonna delle Carceri, 62032 Camerino, Italy
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Meat Quality of Nellore Young Bulls-Effects of Different Days on Feed and Zilpaterol Hydrochloride Supplementation. Animals (Basel) 2021; 11:ani11092688. [PMID: 34573654 PMCID: PMC8467322 DOI: 10.3390/ani11092688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022] Open
Abstract
Ninety-six Nellore young bulls were fed (90 or 117 day) diets containing ZH (8.33 mg/kg) for 0, 20, 30, or 40 days to evaluate the effects of days on feed (DOF) and length of zilpaterol hydrochloride (ZH) supplementation on meat quality. At the end of feeding period, animals were slaughtered, and samples of the Longissimus muscle were collected to evaluate the chemical composition, fatty acid profile, color stability, shear force, and sensory profile. DOF did not affect chemical composition, shear force, sensory tenderness, and most of fatty acids; however, animals fed for 90 d had lower redness (p < 0.01), sustained juiciness (p < 0.01), and more flavor (p = 0.03) than those fed for 117 d. The ZH supplementation decreased lipid content and redness (p < 0.01), initial and sustained tenderness (p < 0.01), initial and sustained juiciness (p < 0.01), but increased protein (p < 0.01) and shear force (p < 0.01) as compared to non-supplemented animals. The ZH supplementation increased total PUFA, c9,c12-18:2, and 20:4-n6, and decreased c9-20:1 (p < 0.05). Feeding ZH impairs meat quality attributes of Nellore young bulls, regardless of duration of supplementation, while DOF has a small effect on meat quality properties.
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Caetano M, Goulart RS, Silva SL, Leme PR, Pflanzer SB, dos Santos ACR, Lanna DPD. Effects of the Duration of Zilpaterol Hydrochloride Supplementation and Days on Feed on Performance, Carcass Traits and Saleable Meat Yield of Nellore Bulls. Animals (Basel) 2021; 11:ani11082450. [PMID: 34438906 PMCID: PMC8388753 DOI: 10.3390/ani11082450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/03/2021] [Accepted: 08/05/2021] [Indexed: 12/02/2022] Open
Abstract
Simple Summary Zilpaterol hydrochloride (ZH) is a β-adrenergic agonist (βAA) to be feed to feedlot cattle at a rate of 8.3 mg/kg during the final 20 to 40 d of the finishing period followed by a minimum 3 d withdrawal period. This compound has the potential to increase animal performance, improve carcass weight and meat yield. Although significant information regarding the effects of duration of ZH supplementation and days on the feed of Bos taurus cattle has been provided, there is a lack of information relative to its effects on Bos indicus breeds such as Nellore cattle. The current study aimed to evaluate the effects of the duration of ZH supplementation and DOF on performance, carcass characteristics, and saleable meat yield of Nellore bulls. The HCW and total saleable meat yield linearly increased with the duration of ZH supplementation as well as when the length of the feedlot period increased. We recommend supplementing ZH for Nellore bulls at least for 20 days, independently of days on feed, to improve hot carcass weight, hindquarter, and saleable meat yields of Nellore bulls. Abstract This study evaluated the effects of the duration of ZH supplementation and days on feed (DOF) on performance, carcass characteristics, and saleable meat yield of Nellore young bulls. The fixed effects included the duration (0, 20, 30, or 40 d before slaughter plus a 3 d ZH withdrawal period—8.33 mg of ZH/kg of DM) and DOF (90 and 117 d). Feed efficiency (G:F) linearly increased when the duration of ZH supplementation increased (p < 0.01). Nellore bulls fed ZH had greater HCW (p < 0.01), dressing percentage (p < 0.01) and Longissimus muscle area (LMA) (p < 0.01), but less 12th-rib fat (p = 0.04) than the control group. The hot carcass weight (HCW) (p < 0.01), and dressing percentage increased linearly (p < 0.01) with the increase of duration of ZH supplementation. The HCW, ossification, and 12th-rib fat increased with DOF (p < 0.01). The ZH supplemented group had most of the individual cuts of hindquarters and total saleable meat increased compared with the control. Zilpaterol hydrochloride was effective in improving hot carcass weight, hindquarter, and saleable meat yields of Nellore bulls when fed for at least 20 d before slaughter, independently of days on feed.
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Affiliation(s)
- Mariana Caetano
- Davies Livestock Research Centre, Department of Animal and Veterinary Bioscience, School of Animal and Veterinary Sciences, Roseworthy Campus, The University of Adelaide, Roseworthy, SA 5371, Australia;
| | - Rodrigo S. Goulart
- Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil; (S.L.S.); (P.R.L.)
- Correspondence:
| | - Saulo L. Silva
- Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil; (S.L.S.); (P.R.L.)
| | - Paulo R. Leme
- Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga 13635-900, SP, Brazil; (S.L.S.); (P.R.L.)
| | - Sérgio B. Pflanzer
- Department of Food Technology, Faculty of Food Engineering, The University of Campinas, Campinas 13083-862, SP, Brazil;
| | - Antonio C. R. dos Santos
- Department of Animal Science, College of Agriculture, University of São Paulo, Luiz de Queiroz, Piracicaba 13418-900, SP, Brazil; (A.C.R.d.S.); (D.P.D.L.)
| | - Dante P. D. Lanna
- Department of Animal Science, College of Agriculture, University of São Paulo, Luiz de Queiroz, Piracicaba 13418-900, SP, Brazil; (A.C.R.d.S.); (D.P.D.L.)
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de Andrade TS, Albertini TZ, Barioni LG, de Medeiros SR, Millen DD, dos Santos ACR, Goulart RS, Lanna DPD. Perception of consultants, feedlot owners, and packers regarding management and marketing decisions on feedlots: a national survey in Brazil (Part II). CANADIAN JOURNAL OF ANIMAL SCIENCE 2020. [DOI: 10.1139/cjas-2019-0220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Research interviews with agribusiness professionals are carried out in several countries for updating and developing technologies. This study aimed to investigate the perception of Brazilian feeders regarding management and marketing tools used in the feedlot industry. Interviews were conducted with groups: nutritionist-consultants (n = 23), feedlot owners (n = 21), and packer-owned feedlots (n = 8). Roughly 58% of the interviewees worked with two cycles of animals per year. Roughly 80% of animals on feedlots were males, with 73% of the respondents having fed only intact males and 75% of the animals were Nellore breed. Among the criteria used for pen formation, weight was the most common (75%). The use of computational tools for feedlot management (71%) and diet formulation (69%) were found to be common, although interviewees did not use any software to characterize feeder animals. In 44% of the respondent feedlots, animals that reached the desired weight and degree of finish were removed for slaughter, whereas the unfinished animals remained in the same pen. We found that a need, therefore, exists to develop efficient strategies for forming homogeneous pens upon animal entry onto feedlots, and maintaining homogenous pens upon the exit of animals for slaughter.
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Affiliation(s)
- Thiago Sérgio de Andrade
- Departament of Animal Science, University of São Paulo (ESALQ/USP), Piracicaba, São Paulo 13418-900, Brazil
| | - Tiago Zanett Albertini
- @Tech — Innovation Technologies for Agriculture, Piracicaba, São Paulo 13418-900, Brazil
| | | | | | - Danilo Domingues Millen
- College of Technology and Agricultural Sciences, São Paulo State University (UNESP), Dracena, São Paulo 17900-00, Brazil
| | | | - Rodrigo Silva Goulart
- College of Animal Science and Food Engineering, Department of Animal Science, University of São Paulo (FZEA/USP), Pirassununga, São Paulo 13635-900, Brazil
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