1
|
Buntyn JO, Steffen D, Sanchez NCB, Sieren SE, Jones SJ, Erickson GE, Carroll JA, Schmidt TB. Serum blood metabolite response and evaluation of select organ weight, histology, and cardiac morphology of beef heifers exposed to a dual corticotropin-releasing hormone and vasopressin challenge following supplementation of zilpaterol hydrochloride. J Anim Sci 2018; 95:5327-5338. [PMID: 29293749 DOI: 10.2527/jas2017.1913] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objectives of this study were 1) to determine if supplementation of zilpaterol hydrochloride (ZH) altered select organ weights, histology, and cardiac anatomical features at harvest and 2) to determine if administration of a corticotropin-releasing hormone (CRH) and vasopressin (VP) challenge following 20 d of ZH supplementation altered the blood chemistry profile in cattle. Crossbred heifers ( = 20; 556 ± 7 kg BW) were randomized into 2 treatment groups: 1) control (CON), without ZH, and 2) zilpaterol (ZIL; ZH at 8.33 mg/kg [DM basis] for 20 d). On d 20 of supplementation, heifers were fitted with indwelling jugular catheters. On d 24, starting at 0800 h and continuing until 1600 h, blood samples were collected at 60-min intervals. At 1000 h, heifers received an i.v. bolus of CRH (0.3 µg/kg BW) and VP (1.0 µg/kg BW) to activate the stress axis. Serum was separated and stored at -80°C until analyzed for a large-animal chemistry panel. Following the CRH/VP challenge, heifers were harvested on d 25, 26, and 27 (5, 6, and 7 d after ZH supplementation); BW, HCW, select organ weights, and histology were measured, and a total heart necropsy was performed. A treatment effect ( ≤ 0.02) was observed for Ca, K, creatinine, alkaline phosphatase, and sorbitol dehydrogenase. Zilpaterol-fed heifers had decreased ( ≤ 0.02) concentrations of Ca and K and increased concentrations ( 0.01) of creatinine ( = 0.02) during the CRH/VP challenge when compared to control heifers. Control heifers had greater ( ≤ 0.05) alkaline phosphatase and sorbitol dehydrogenase concentrations when compared with ZIL heifers. A treatment × time interaction ( = 0.02) was observed for P; concentrations were similar between treatments from -2 to 6 h postchallenge, and 7 h postchallenge CON heifers had decreased P. Liver ( = 0.06) and kidney ( = 0.08) weights as a percentage of BW tended ( ≤ 0.08) to be reduced in ZIL heifers. Gross liver weights tended ( = 0.08) to be lower in ZIL heifers. Other organ (heart, lung, adrenals) to BW ratios remained similar ( ≥ 0.41). These data suggest that there are some variations observed between treatments in terms of response to ZH supplementation and the CRH/VP challenge; however, in the environmental conditions of this study, limited variation in blood metabolic responses and organ weights suggests that the supplementation of ZH did not detrimentally alter the physiology of cattle.
Collapse
|
2
|
Lancaster JM, Psota E, Mote BE, Perez L, Fricke L, Mittek M, Kett LE, Schmidt TB. 131 Evaluation of a Novel Computer Vision Systems’ Ability to Continuously Identify and Track the Activities of Newly Weaned Pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - E Psota
- University of Nebraska-Lincoln, Lincoln, NE
| | - B E Mote
- University of Nebraska-Lincoln, Lincoln, NE
| | - L Perez
- University of Nebraska-Lincoln, Lincoln, NE
| | - L Fricke
- University of Nebraska-Lincoln, Lincoln, NE
| | - M Mittek
- University of Nebraska-Lincoln, Lincoln, NE
| | - L E Kett
- University of Nebraska-Lincoln, Lincoln, NE
| | | |
Collapse
|
3
|
Steele CC, Boykin CA, Eastwood LC, Harris MK, Hale DS, Kerth CR, Griffin DB, Arnold AN, Gehring KB, Hasty JD, Belk KE, Woerner DR, Jr. RJD, Martin JN, VanOverbeke DL, Mafi GG, Pfeiffer MM, Lawrence TE, McEvers TJ, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM, Gottlieb J, Savell JW. National Beef Quality Audit- 2016: Frequency Distributions of Beef Ribeyes within Usda Quality Grades. Meat and Muscle Biology 2018. [DOI: 10.22175/rmc2018.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
4
|
Eastwood LC, Harris MK, Boykin CA, Arnold AN, Gehring KB, Hale DS, Kerth CR, Griffin DB, Savell JW, Belk KE, Woerner DR, Hasty JD, Jr. RJD, Martin JN, Lawrence TE, McEvers TJ, VanOverbeke DL, Mafi GG, Pfeiffer MM, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM. National Beef Quality Audit-2016: Comparisons between Fed Steers/Heifers and Market Cows/Bulls for By-Product Condemnations. Meat and Muscle Biology 2018. [DOI: 10.22175/rmc2018.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
5
|
Boykin CA, Eastwood LC, Harris MK, Hale DS, Kerth CR, Griffin DB, Arnold AN, Hasty JD, Belk KE, Woerner DR, Delmore RJ, Martin JN, VanOverbeke DL, Mafi GG, Pfeiffer MM, Lawrence TE, McEvers TJ, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM, Gottlieb J, Savell JW. National Beef Quality Audit - 2016: Survey of carcass characteristics through instrument grading assessments. J Anim Sci 2017; 95:3003-3011. [PMID: 28727107 DOI: 10.2527/jas.2017.1544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The instrument grading assessment portion of the National Beef Quality Audit (NBQA) - 2016 allows the unique opportunity to evaluate beef carcass traits over the course of a year. One week of instrument grading data was collected each month from 5 beef processing corporations encompassing 18 facilities from January 2016 through December 2016 ( = 4,544,635 carcasses). Mean USDA yield grade (YG) was 3.1 with 1.37 cm fat thickness (FT), 88.9 cm LM area, 393.6 kg HCW, and 2.1% KPH. Frequency distribution of USDA YG was 9.5% YG 1, 34.6% YG 2, 38.8% YG 3, 14.6% YG 4, and 2.5% YG 5. Increases in HCW and FT since the NBQA-2011 were major contributors to differences in mean YG and the (numerically) increased frequency of YG 3, 4, and 5 carcasses found in the current audit. Mean marbling score was Small, and the distribution of USDA quality grades was 4.2% Prime, 71.4% Choice, 21.7% Select, and 2.7% other. Frequency of carcasses grading Prime on Monday (6.43%) was numerically higher than the average frequency of carcasses grading Prime overall (4.2%). Monthly HCW means were 397.6 kg in January, 397.2 kg in February, 396.5 kg in March, 389.3 kg in April, 384.8 kg in May, 385.0 kg in June, 386.1 kg in July, 394.1 kg in August, 399.1 kg in September, 403.9 kg in October, 406.5 kg in November, and 401.9 kg in December. Monthly mean marbling scores were Small in January, Small in February, Small in March, Small in April, Small in May, Small in June, Small in July, Small in August, Small in September, Small in October, Small in November, and Small in December. Both mean HCW and mean marbling score declined in the months of May and June. The month with the greatest numerical frequency of dark cutters was October (0.74%). Comparison of overall data from in-plant carcass and instrument grading assessments revealed close alignment of information, especially for YG (3.1 for in-plant assessment versus 3.1 for instrument grading) and marbling (Small for in-plant assessment versus Small for instrument grading). These findings allow the beef industry access to the greatest volume of beef value-determining characteristics for the U.S. fed steer and heifer population than ever reported, resulting in potentially more precise targeting of future quality and consistency efforts.
Collapse
|
6
|
Boykin CA, Eastwood LC, Harris MK, Hale DS, Kerth CR, Griffin DB, Arnold AN, Hasty JD, Belk KE, Woerner DR, Delmore RJ, Martin JN, VanOverbeke DL, Mafi GG, Pfeiffer MM, Lawrence TE, McEvers TJ, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM, Gottlieb J, Savell JW. National Beef Quality Audit-2016: In-plant survey of carcass characteristics related to quality, quantity, and value of fed steers and heifers. J Anim Sci 2017; 95:2993-3002. [PMID: 28727109 DOI: 10.2527/jas.2017.1543] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The National Beef Quality Audit (NBQA)-2016 used in-plant cooler assessments to benchmark the current status of the fed steer and heifer beef industry in the United States. In-plant cooler assessments ( = 9,106 carcasses) were conducted at 30 facilities, where approximately 10% of a single day's production were evaluated for USDA quality grade (QG) and yield grade (YG) factors. Frequencies of evaluated traits were 66.5% steer and 33.4% heifer sex classes and 82.9% native, 15.9% dairy-type, and 1.2% estimated breed types. Mean USDA YG factors were 1.42 cm for adjusted fat thickness, 89.5 cm for LM area, 390.3 kg for HCW, and 1.9% for KPH. Mean USDA YG was 3.1, with a frequency distribution of 9.6% YG 1, 36.7% YG 2, 39.2% YG 3, 12.0% YG 4, and 2.5% YG 5. Mean USDA QG traits were Small for marbling score, A for overall maturity, A55 for lean maturity, and A for skeletal maturity. Mean USDA QG was Select with a frequency distribution of QG of 3.8% Prime, 67.3% Choice, 23.2% Select, and 5.6% lower score. Lower score included dark cutter (1.9%), blood splash (0.1%), and hard bone, which are USDA overall maturity scores of C or older (1.8%). Marbling score distributions were 0.85% Slightly Abundant or greater, 7.63% Moderate, 23.54% Modest, 39.63% Small, 23.62% Slight, and 0.83% Traces or less. Carcasses that were Choice or Select and USDA YG 2 or 3 accounted for 70.7% of the carcasses evaluated. Compared with the previous NBQA, we found a numerical increase in mean USDA YG, USDA QG, adjusted fat thickness, HCW, LM area, and marbling score with an increase in dairy-type carcasses and percentage of carcasses grading USDA Prime and Choice as well as frequency of USDA YG 4 and 5. The findings from this study will be used by all segments of the industry to understand and improve the quality of fed steer and heifer beef that is being produced.
Collapse
|
7
|
Harris MK, Eastwood LC, Boykin CA, Arnold AN, Gehring KB, Hale DS, Kerth CR, Griffin DB, Savell JW, Belk KE, Woerner DR, Hasty JD, Delmore RJ, Martin JN, Lawrence TE, McEvers TJ, VanOverbeke DL, Mafi GG, Pfeiffer MM, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM. National Beef Quality Audit-2016: Transportation, mobility, live cattle, and carcass assessments of targeted producer-related characteristics that affect value of market cows and bulls, their carcasses, and associated by-products. Transl Anim Sci 2017; 1:570-584. [PMID: 32704679 PMCID: PMC7204971 DOI: 10.2527/tas2017.0063] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/09/2017] [Indexed: 11/25/2022] Open
Abstract
The National Beef Quality Audit–2016 marks the fourth iteration in a series assessing the quality of live beef and dairy cows and bulls and their carcass counterparts. The objective was to determine the incidence of producer-related defects, and report cattle and carcass traits associated with producer management. Conducted from March through December of 2016, trailers (n = 154), live animals (n = 5,470), hide-on carcasses (n = 5,278), and hide-off hot carcasses (n = 5,510) were surveyed in 18 commercial packing facilities throughout the United States. Cattle were allowed 2.3 m2 of trailer space on average during transit indicating some haulers are adhering to industry handling guidelines for trailer space requirements. Of the mixed gender loads arriving at processing facilities, cows and bulls were not segregated on 64.4% of the trailers surveyed. When assessed for mobility, the greatest majority of cattle surveyed were sound. Since the inception of the quality audit series, beef cows have shown substantial improvements in muscle. Today over 90.0% of dairy cows are too light muscled. The mean body condition score for beef animals was 4.7 and for dairy cows and bulls was 2.6 and 3.3, respectively. Dairy cattle were lighter muscled, yet fatter than the dairy cattle surveyed in 2007. Of cattle surveyed, most did not have horns, nor any visible live animal defects. Unbranded hides were observed on 77.3% of cattle. Carcass bruising was seen on 64.1% of cow carcasses and 42.9% of bull carcasses. However, over half of all bruises were identified to only be minor in severity. Nearly all cattle (98.4%) were free of visible injection-site lesions. Current results suggest improvements have been made in cattle and meat quality in the cow and bull sector. Furthermore, the results provide guidance for continued educational and research efforts for improving market cow and bull beef quality.
Collapse
Affiliation(s)
- M K Harris
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - L C Eastwood
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - C A Boykin
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - A N Arnold
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - K B Gehring
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - D S Hale
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - C R Kerth
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - D B Griffin
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - J W Savell
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - K E Belk
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - D R Woerner
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - J D Hasty
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - R J Delmore
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - J N Martin
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - T E Lawrence
- Beef Carcass Research Center- Department of Agricultural Sciences, West Texas A&M University, Canyon 79016
| | - T J McEvers
- Beef Carcass Research Center- Department of Agricultural Sciences, West Texas A&M University, Canyon 79016
| | - D L VanOverbeke
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - G G Mafi
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - M M Pfeiffer
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - T B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln 68583
| | - R J Maddock
- Department of Animal Sciences, North Dakota State University, Fargo 58108
| | - D D Johnson
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - C C Carr
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - J M Scheffler
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - T D Pringle
- Department of Animal & Dairy Science, University of Georgia, Athens 30602
| | - A M Stelzleni
- Department of Animal & Dairy Science, University of Georgia, Athens 30602
| |
Collapse
|
8
|
Buntyn JO, Burdick Sanchez NC, Schmidt TB, Erickson GE, Sieren SE, Jones SJ, Carroll JA. The metabolic, stress axis, and hematology response of zilpaterol hydrochloride supplemented beef heifers when exposed to a dual corticotropin-releasing hormone and vasopressin challenge. J Anim Sci 2017; 94:2798-810. [PMID: 27482667 DOI: 10.2527/jas.2015-0192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The objective of this study was to determine the metabolic, stress, and hematology response of beef heifers supplemented with zilpaterol hydrochloride (ZH) when exposed to an endocrine stress challenge. Heifers ( = 20; 556 ± 7 kg BW) were randomized into 2 treatment groups: 1) control (CON), no ZH supplementation, and 2) zilpaterol (ZIL), supplemented with ZH at 8.33 mg/kg (DM basis). The ZIL group was supplemented ZH for 20 d, with a 3-d withdrawal period. On d 24, heifers received an intravenous bolus of corticotropin-releasing hormone (CRH; 0.3 µg/kg BW) and arginine vasopressin (VP; 1.0 µg/kg BW) to activate the stress axis. Blood samples were collected at 30-min intervals for serum and 60-min intervals for plasma and whole blood, from -2 to 8 h relative to the challenge at 0 h (1000 h). Samples were analyzed for glucose, insulin, NEFA, blood urea nitrogen (BUN), cortisol, epinephrine, norepinephrine, and complete blood cell counts. Following the challenge, cattle were harvested over a 3-d period. Liver, LM, and biceps femoris (BF) samples were collected and analyzed for glucose, lactate, and glycolytic potential (GP). There was a treatment ( ≤ 0.001) effect for vaginal temperature (VT), with ZIL having a 0.1°C decrease in VT when compared with CON. A treatment × time effect ( = 0.002) was observed for NEFA. A treatment effect was observed for BUN; ZIL had decreased BUN concentrations compared with CON ( < 0.001) prior to the challenge; however, no treatment × time effect was observed. There was also a treatment effect for cortisol ( ≤ 0.01) and epinephrine ( = 0.003); ZIL had decreased cortisol and epinephrine during the CRH/VP challenge when compared with CON. There was a time effect for total white blood cells, lymphocytes, and monocytes; each variable increased ( ≤ 0.01) 2 h postchallenge. Additionally, neutrophil counts decreased ( ≤ 0.01) in response to CRH/VP challenge in both treatment groups. Glucose concentrations within the LM were greater ( = 0.03) in CON when compared with ZIL. Lactate concentrations and GP within the BF were greater in CON ( = 0.05) when compared with ZIL. These data suggest there are some variations observed between treatments in terms of response to the CRH/VP challenge; however, in the environmental conditions of this trial, none of the variations observed suggest that the supplementation of ZH detrimentally alters the ability of cattle to effectively respond to stressful stimuli.
Collapse
|
9
|
Eastwood LC, Boykin CA, Harris MK, Arnold AN, Hale DS, Kerth CR, Griffin DB, Savell JW, Belk KE, Woerner DR, Hasty JD, Delmore RJ, Martin JN, Lawrence TE, McEvers TJ, VanOverbeke DL, Mafi GG, Pfeiffer MM, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM. National Beef Quality Audit-2016: Transportation, mobility, and harvest-floor assessments of targeted characteristics that affect quality and value of cattle, carcasses, and by-products. Transl Anim Sci 2017; 1:229-238. [PMID: 32704647 PMCID: PMC7250433 DOI: 10.2527/tas2017.0029] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 04/17/2017] [Indexed: 11/29/2022] Open
Abstract
The National Beef Quality Audit-2016 (NBQA-2016) was conducted to assess current transportation, mobility, and quality characteristics of U.S. fed steers and heifers. Data were collected at 17 beef processing facilities between March and November 2016. About 8,000 live cattle were evaluated for transportation and mobility, and about 25,000 carcasses were evaluated on the slaughter floor. Cattle were in transit to the slaughter facility for a mean duration of 2.7 h from a mean distance of 218.5 km using trailers with dimensions ranging from 17.84 m2 to 59.09 m2. Area allotted per animal averaged 1.13 m2 and ranged from 0.85 m2 to 2.28 m2. A total of 96.8% of cattle received a mobility score of 1 (walks easily, no apparent lameness). Identification types (35.1% had multiple) were lot visual tags (61.5%), individual tags (55.0%), electronic tags (16.9%), metal-clip tags (9.2%), bar-coded tags (0.05%), wattles (0.01%), and other (2.6%). Cattle were black-hided (57.8%), Holstein (20.4%), red-hided (10.5%), yellow-hided (4.8%), gray-hided (2.9%), brown-hided (1.3%), and white-hided (1.1%). Unbranded hides were observed on 74.3% of cattle; 18.6% had brands located on the butt, 6.3% on the side, and 1.3% on the shoulder (values exceed 100% due to multiple brands). For hide-on carcasses, 37.7% displayed no mud or manure; specific locations for mud or manure were legs (40.8%), belly (33.0%), tail region (15.5%), side (6.8%), and top-line (3.9%). Cattle without horns represented 83.3% of the sample, and cattle that did have horns measured: < 2.54 cm (5.5%), 2.54 to 12.7 cm (8.3%), and > 12.7 cm (2.9%). Carcasses without bruises represented 61.1% of those sampled, whereas 28.2% had 1, 8.2% had 2, 2.1% had 3, and 0.3% had 4 bruises. Of those carcasses with a bruise, the bruise was located on the loin (29.7%), round (27.8%), chuck (16.4%), rib (14.4%), and brisket/plate/flank (11.6%). Frequencies of offal condemnations were livers (30.8%), lungs (18.2%), viscera (16.3%), hearts (11.1%), heads (2.7%), and tongues (2.0%). Compared to NBQA-2011, fewer cattle were identified for traceability, fewer were black-hided, a greater number were Holstein cattle, more with no brand and no horns, fewer without bruises, more liver, lung, and viscera condemnations, and fewer heads and tongues were condemned. The NBQA remains an influential survey for the U.S. beef industry to provide benchmarks and strategic plans for continued improvement of beef quality and consistency.
Collapse
Affiliation(s)
- L C Eastwood
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - C A Boykin
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - M K Harris
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - A N Arnold
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - D S Hale
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - C R Kerth
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - D B Griffin
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - J W Savell
- Department of Animal Science, Texas A&M AgriLife Research, Texas A&M University, College Station 77843
| | - K E Belk
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - D R Woerner
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - J D Hasty
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - R J Delmore
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - J N Martin
- Department of Animal Sciences, Colorado State University, Fort Collins 80523
| | - T E Lawrence
- Beef Carcass Research Center, Department of Agricultural Sciences, West Texas A&M University, Canyon 79016
| | - T J McEvers
- Beef Carcass Research Center, Department of Agricultural Sciences, West Texas A&M University, Canyon 79016
| | - D L VanOverbeke
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - G G Mafi
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - M M Pfeiffer
- Department of Animal Science, Oklahoma State University, Stillwater 74078
| | - T B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln 68583
| | - R J Maddock
- Department of Animal Sciences, North Dakota State University, Fargo 58108
| | - D D Johnson
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - C C Carr
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - J M Scheffler
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - T D Pringle
- Department of Animal & Dairy Science, University of Georgia, Athens 30602
| | - A M Stelzleni
- Department of Animal & Dairy Science, University of Georgia, Athens 30602
| |
Collapse
|
10
|
Carroll JA, Schmidt TB, Callaway TR, Wilson JG, Donaldson JR. Use of a novel oleaginous microorganism as a potential source of lipids for weanling pigs . Transl Anim Sci 2017; 1:201-207. [PMID: 32704643 PMCID: PMC7250434 DOI: 10.2527/tas2017.0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/18/2017] [Indexed: 11/13/2022] Open
Abstract
Weanling pigs are at risk of succumbing to illness due to an immature immune system and insufficient supply of available energy at the time of weaning. This study was aimed at determining whether oleaginous bacteria could serve as a source of lipids to weanling pigs. Weanling pigs were provided a daily dose of 1×109 colony fomring unit (CFU) = kg−1 of the novel oleaginous Enterobacter cloacae strain JD6301 or JD8715 (which is a variant form of JD6301 capable of producing extracellular triglycerides) via oral gavage for 5 d. Serum was collected every 6 h and intestinal samples were collected at 6 d. Providing pigs with JD6301 or JD8715 significantly increased serum concentrations of triglycerides and non-esterified fatty acids (NEFA) within 72 h. Additionally, the JD6301 and JD8715 strains were able to survive within the gastrointestinal tract throughout the duration of the study. These results suggest that providing Enterobacter cloacae can increase the serum lipids in the pigs, thus potentially providing an additional source of energy to animals during times of stress. This could potentially help improve the metabolic response of animals during times of stress.
Collapse
Affiliation(s)
- J A Carroll
- Livestock Issues Research Unit, U. S. Department of Agriculture, Agriculture Research Service, Lubbock, TX 79403
| | - T B Schmidt
- Animal Science Department, University of Nebraska, Lincoln, 68583
| | - T R Callaway
- Food and Feed Safety Research Unit, U. S. Department of Agriculture, Agricultural Research Service, College Station, TX 77845
| | - J G Wilson
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, 32827
| | - J R Donaldson
- Department of Biological Sciences, The University of Southern Mississippi, Hattiesburg, 39406
| |
Collapse
|
11
|
Boykin CA, Eastwood LC, Harris MK, Hale DS, Kerth CR, Griffin DB, Arnold AN, Hasty JD, Belk KE, Woerner DR, Delmore RJ, Martin JN, VanOverbeke DL, Mafi GG, Pfeiffer MM, Lawrence TE, McEvers TJ, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM, Gottlieb J, Savell JW. National Beef Quality Audit–2016: In-plant survey of carcass characteristics related to quality, quantity, and value of fed steers and heifers. J Anim Sci 2017. [DOI: 10.2527/jas2017.1543] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
12
|
Boykin CA, Eastwood LC, Harris MK, Hale DS, Kerth CR, Griffin DB, Arnold AN, Hasty JD, Belk KE, Woerner DR, Delmore RJ, Martin JN, VanOverbeke DL, Mafi GG, Pfeiffer MM, Lawrence TE, McEvers TJ, Schmidt TB, Maddock RJ, Johnson DD, Carr CC, Scheffler JM, Pringle TD, Stelzleni AM, Gottlieb J, Savell JW. National Beef Quality Audit – 2016: Survey of carcass characteristics through instrument grading assessments. J Anim Sci 2017. [DOI: 10.2527/jas2017.1544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
13
|
Calkins CR, O’Daniel JJ, Naganathan GK, Hart KB, Domenech-Perez KI, Schmidt TB. Potential Errors in Determination of Longissimus Muscle Area in Carcasses from Heifers Fed with or Without Zilpaterol Hydrochloride. Meat and Muscle Biology 2017. [DOI: 10.22175/rmc2017.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
14
|
Burdick Sanchez NC, Carroll JA, Broadway PR, Hughes HD, Roberts SL, Richeson JT, Schmidt TB, Vann RC. Cattle temperament influences metabolism: metabolic response to glucose tolerance and insulin sensitivity tests in beef steers. Domest Anim Endocrinol 2016; 56:85-95. [PMID: 27137848 DOI: 10.1016/j.domaniend.2016.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 01/01/2023]
Abstract
Cattle temperament, defined as the reactivity of cattle to humans or novel environments, can greatly influence several physiological systems in the body, including immunity, stress, and most recently discovered, metabolism. Greater circulating concentrations of nonesterified fatty acids (NEFAs) found in temperamental cattle suggest that temperamental cattle are metabolically different than calm cattle. Further, elevated NEFA concentrations have been reported to influence insulin sensitivity. Therefore, the objective of this study was to determine whether cattle temperament would influence the metabolic response to a glucose tolerance test (GTT) and insulin sensitivity test (IST). Angus-cross steers (16 calm and 15 temperamental; 216 ± 6 kg BW) were selected based on temperament score measured at weaning. On day 1, steers were moved into indoor stanchions to allow measurement of individual ad libitum feed intake. On day 6, steers were fitted with indwelling rectal temperature probes and jugular catheters. At 9 AM on day 7, steers received the GTT (0.5-mL/kg BW of a 50% dextrose solution), and at 2 PM on day 7, steers received the IST (2.5 IU bovine insulin/kg BW). Blood samples were collected and serum isolated at -60, -45, -30, -15, 0, 10, 20, 30, 45, 60, 90, 120, and 150 min relative to each challenge. Serum was stored at -80°C until analyzed for cortisol, glucose, NEFA, and blood urea nitrogen concentrations. All variables changed over time (P < 0.01). For the duration of the study, temperamental steers maintained greater (P < 0.01) serum NEFA and less (P ≤ 0.01) serum blood urea nitrogen and insulin sensitivity (calculated using Revised Quantitative Insulin Sensitivity Check Index) compared with calm steers. During the GTT, temperamental steers had greater (P < 0.01) serum glucose, yet decreased (P = 0.03) serum insulin and (P < 0.01) serum insulin: serum glucose compared to calm cattle. During the IST, temperamental steers had greater (P < 0.01) serum insulin and a greater (P < 0.01) serum insulin: serum glucose as compared with calm steers. These data demonstrate that differences exist in the manner in which temperamental steers respond to glucose and insulin, potentially a result of elevated serum NEFA concentrations, which may result in changes in utilization and redistribution of energy in temperamental vs calm cattle.
Collapse
Affiliation(s)
| | - J A Carroll
- Livestock Issues Research Unit, ARS-USDA, Lubbock, TX, 79403, USA.
| | - P R Broadway
- Livestock Issues Research Unit, ARS-USDA, Lubbock, TX, 79403, USA
| | - H D Hughes
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, 79016, USA
| | - S L Roberts
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, 79016, USA
| | - J T Richeson
- Department of Agricultural Sciences, West Texas A&M University, Canyon, TX, 79016, USA
| | - T B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, 68583, USA
| | - R C Vann
- MAFES-Brown Loam, Mississippi State University, Raymond, MS, 39154, USA
| |
Collapse
|
15
|
Cribbs JT, Bernhard BC, Young TR, Jennings MA, Burdick Sanchez NC, Carroll JA, Callaway TR, Schmidt TB, Johnson BJ, Rathmann RJ. Dehydrated citrus pulp alters feedlot performance of crossbred heifers during the receiving period and modulates serum metabolite concentrations before and after an endotoxin challenge. J Anim Sci 2015; 93:5791-800. [PMID: 26641189 DOI: 10.2527/jas.2015-9571] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
English × Continental heifers ( = 180) were sourced in 2 loads (219.3 ± 16.0 and 221.4 ± 16.4 kg, respectively) from commercial auction barns to study the effects of feeding dehydrated citrus pulp (DCP) on feedlot performance of newly received heifers. A completely randomized block design was used with BW nested within arrival load and blocked by BW into 3 dietary treatments (36 pens, 5 heifers/pen, 12 blocks, 3 pens/block, and 12 pens/treatment). Treatment diets contained 1) 0% DCP (control diet [CON]), 2) 10% DCP, or 3) 20% DCP on a DM basis. Diets containing DCP were exchanged with steam-flaked corn on a 1:1 basis. Cattle were fed a 63, 73, and 83% concentrate diet from d 0 to 28, d 28 to 42, and d 42 to 56, respectively. Over the 56-d trial period, as the amount of dietary DCP increased, DMI decreased ( = 0.01), ADG decreased ( < 0.01), and G:F decreased ( = 0.02). From d 0 to 28, there was no difference in the observed minus the predicted NEg of the diet ( = 0.73); from d 28 to 42, there was a linear increase in NEg favoring DCP treatments ( < 0.01); and from d 42 to 56, there was a linear decrease in NEg against the DCP treatments ( < 0.01). At the conclusion of the trial, a subset of heifers ( = 22; 307.89 ± 3.32 kg on d 63) were used to evaluate blood metabolite concentrations before and after a lipopolysaccharide (LPS) challenge. On d 63, heifers were fitted with jugular catheters and moved into individual stalls. On d 64, heifers were intravenously challenged with LPS (0.5 μg/kg BW), and blood samples were collected every 0.5 h from -2 to 8 h and at 24 h relative to the LPS challenge (0 h). Serum glucose, serum urea nitrogen (SUN), and NEFA concentrations were determined. Cattle lost less weight at both 24 and 72 h after the LPS challenge with increasing DCP percentage ( < 0.01). Glucose ( = 0.12) and NEFA ( = 0.13) concentrations did not differ before the LPS challenge; however, there was a treatment effect for SUN, with elevated concentrations of SUN in CON cattle ( < 0.01). After the LPS challenge, DCP-fed cattle had reduced glucose, elevated NEFA, and reduced SUN concentrations ( ≤ 0.01). Results indicate that dietary DCP modulated metabolite concentrations in heifers following an endotoxin challenge and affected feedlot performance when incorporated in receiving diets in replacement of corn. Future studies will need to address strategies to increase DMI or explore levels of DCP less than 10% in the diet of newly received heifer calves.
Collapse
|
16
|
Abstract
Supplementation of direct-fed microbials (DFM) as a means to improve the health and performance of livestock has generated significant interest over the past 15+ years. A driving force for this increased interest in DFM is to reduce or eliminate the use of low-dose antibiotics in livestock production. This increased attention toward DFM supplementation has generated an extensive body of research. This effort has resulted in conflicting reports. Although there has been considerable variation in the design of these studies, one of the main causes for this lack of consistency may be attributed to the variation in the experimental immune challenge incorporated to evaluate DFM supplementation. Taking into account the experimental immune challenge, there is strong evidence to suggest that DFM supplementation may have an impact on the immune response, overall health, and performance of livestock.
Collapse
Affiliation(s)
- J O Buntyn
- Animal Science Department, University of Nebraska-Lincoln, Lincoln, Nebraska 68583; ,
| | - T B Schmidt
- Animal Science Department, University of Nebraska-Lincoln, Lincoln, Nebraska 68583; ,
| | - D J Nisbet
- Food and Feed Safety Research Unit, South Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, Texas 77845;
| | - T R Callaway
- Food and Feed Safety Research Unit, South Plains Agricultural Research Center, Agricultural Research Service, US Department of Agriculture, College Station, Texas 77845;
| |
Collapse
|
17
|
Schmidt TB, Du M. MEAT SCIENCE AND MUSCLE BIOLOGY SYMPOSIUM: Preharvest factors affecting the prevalence of pathogens in livestock and meat1. J Anim Sci 2014; 92:1343-4. [DOI: 10.2527/jas.2014-7661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- T. B. Schmidt
- Department of Animal Science, University of Nebraska – Lincoln, Lincoln 68583
| | - M. Du
- Department of Animal Sciences, Washington State University, Pullman 99164
| |
Collapse
|
18
|
Schmidt TB, Du M. Meat Science and Muscle Biology Symposium: Pre-harvest factors affecting the prevalence of pathogens in livestock and meat. J Anim Sci 2014. [DOI: 10.2527/jas.2013-7661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
19
|
Clark JH, Olson KC, Schmidt TB, Linville ML, Alkire DO, Meyer DL, Rentfrow GK, Carr CC, Berg EP. Effects of dry matter intake restriction on diet digestion, energy partitioning, phosphorus retention, and ruminal fermentation by beef steers. J Anim Sci 2007; 85:3383-90. [PMID: 17785599 DOI: 10.2527/jas.2006-741] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Two experiments were conducted to determine the effects of DMI restriction on diet digestion, ruminal fermentation, ME intake, and P retention by beef steers. In Exp. 1, twelve Angus x steers (average initial BW = 450 +/- 18 kg) were assigned randomly to 1 of 3 diets that were formulated to promote a 1.6-kg ADG at intake levels corresponding approximately to 100% (ad libitum, AL), 90% (IR90), or 80% (IR80) of ad libitum DMI. In Exp. 2, twelve crossbred steers (average initial BW = 445 +/- 56 kg) fitted with ruminal cannulae were randomly assigned to 1 of 2 diets that were formulated to promote a 1.6-kg ADG at AL or IR80. All diets delivered similar total NE, MP, Ca, and P per day. During both experiments, fecal DM output by IR80 was less (P </= 0.03) than that of AL; IR90 was similar (P = 0.51) to AL during Exp. 1. Digestion of DM by IR80 cattle was greater (P </= 0.03) than that of AL during both experiments; IR90 was similar (P = 0.31) to AL during Exp. 1. Metabolizable energy intake was similar (P >/= 0.20) among treatments during both experiments, whereas P retention was similar (P >/= 0.46) among treatments during Exp. 1. Total VFA and the molar proportion of acetate of AL were greater (P </= 0.03) than that of IR80 during Exp. 2; however, IR80 had a greater (P = 0.03) molar proportion of propionate. Under the conditions of these studies, restricting DMI while holding NE, ruminally degradable protein, and MP intakes constant decreased fecal DM output and changed ruminal fermentation patterns in finishing steers. Improvements in performance associated with programmed-feeding regimens of the type studied here do not appear to be related to changes in diet digestion or ME intake.
Collapse
Affiliation(s)
- J H Clark
- Division of Animal Sciences, University of Missouri-Columbia 920 East Campus Drive, Columbia, MO 65201, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Brandt MM, Keisler DH, Meyer DL, Schmidt TB, Berg EP. Serum hormone concentrations relative to carcass composition of a random allotment of commercial-fed beef cattle12. J Anim Sci 2007; 85:267-75. [PMID: 17179565 DOI: 10.2527/jas.2005-591] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cattle (n = 995 steers and 757 heifers) were randomly selected from a commercial abattoir (Emporia, KS) to determine the relationships between USDA quality and yield grade characteristics and serum concentrations of leptin, IGF-I, and GH. Animals were randomly selected postexsanguination on the slaughter line on 4 occasions (March, May, August, and January). Blood was collected at exsanguination and transported to the University of Missouri for analysis. Sex and hide color were recorded. Carcass data included HCW, 12th-rib fat thickness, KPH, LM area, and marbling score, which were collected from each carcass approximately 24 h postmortem. Average serum leptin concentrations were greater (P = 0.008) for heifers (11.9 ng/mL) than steers (10.9 ng/mL). Heifers had lighter carcasses (331.9 vs. 352.2 kg, P < 0.001), greater 12th-rib fat measurements (1.3 vs. 1.1 cm, P < 0.001), greater KPH (2.5 vs. 2.4%, P < 0.001), and more marbling (Small(40) vs. Small(10), P < 0.001) than steers. Positive correlations (P < 0.01) existed between leptin concentration and marbling score (r = 0.28), 12th-rib fat depth (r = 0.37), KPH (r = 0.23), and USDA yield grade (r = 0.32). Negative correlations were found between leptin and IGF-I (r = -0.11; P < 0.001) and leptin and GH (r = -0.32; P < 0.001). Negative correlations (P < 0.01) were observed for IGF-I and KPH (r = -0.23) and marbling score (r = -0.20), whereas GH was most highly negatively correlated with KPH (r = -0.23; P < 0.001). Leptin concentration accounted for variation (P < 0.001) in a model separating least squares means across USDA quality grade, separating USDA standard (8.5 ng/mL), select (10.3 ng/mL), low choice (12.2 ng/mL), and upper 2/3 choice/prime (>12.9 ng/mL) carcasses. There was no difference (P = 0.31) observed in leptin concentrations between the upper 2/3 choice and prime carcasses (12.9 and 14.2 ng/mL, respectively). Relationships within endocrine profiles and between endocrine concentrations and carcass quality characteristics may prove to be a useful tool for the prediction of beef carcass composition.
Collapse
Affiliation(s)
- M M Brandt
- Division of Animal Science, University of Missouri, Columbia 65211, USA
| | | | | | | | | |
Collapse
|
21
|
Meyer DL, Kerley MS, Walker EL, Keisler DH, Pierce VL, Schmidt TB, Stahl CA, Linville ML, Berg EP. Growth rate, body composition, and meat tenderness in early vs. traditionally weaned beef calves. J Anim Sci 2006; 83:2752-61. [PMID: 16282613 DOI: 10.2527/2005.83122752x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
One hundred forty spring-born Angus x Gelbvieh and purebred Angus steers were selected for study as early weaned (EW; average age at weaning = 90 +/- 30 d) or traditionally weaned (TW; average age at weaning = 174 +/- 37 d) steers that were non-implanted or implanted (Synovex-S, Fort Dodge Animal Health, Overland Park, KS). Initially, steers were sorted by age, sire, and farm, and then allotted randomly in a 2 x 2 factorial arrangement of treatments of EW implanted (EWI), EW nonimplanted (EWN), TW implanted (TWI), or TW nonimplanted (TWN). Ultrasound measurements (US) of LM area (LMA), 12th rib fat thickness (US-BF), and marbling (US-M) were collected every 28 d during the time that steers were on feed. At 202 d of age, EW calves had larger US-LMA, US-BF, and BW than TW calves (37.9 vs. 32.3 cm2, 0.38 vs. 0.26 cm, and 271.6 vs. 218.9 kg, respectively; P < 0.001). At slaughter, EW calves had heavier HCW (290.4 vs. 279.7 kg, respectively; P < 0.05) and greater USDA marbling scores (51.25 vs. 46.26, respectively; P < 0.05) than TW calves; more EW steers graded USDA Choice or greater (P = 0.05). However, no differences were detected in BW (P = 0.15), LMA (P = 0.39), BF (P = 0.45), or liver abscess scores (P = 0.41). Twenty-four implanted steers were selected from the original group of 140 and sorted into two slaughter groups of 12. Twelve implanted steers from each weaning group, matched in slaughter BW but differing in age, were subsampled at slaughter to assess the effect of weaning age and chronological age on muscle tenderness. Younger animals had lower Warner-Bratzler shear force values (P < 0.001) than older calves after 14 d of postmortem aging; however, no differences were found in tenderness after 21 d of aging. Furthermore, there was greater variance (P < 0.001) in Warner-Bratzler shear force values among younger, EW steers vs. older, TW steers. These data provide evidence that early weaning of beef calves may be used as a tool to more effectively manage the cow-calf production system without compromising the quality of the offspring.
Collapse
Affiliation(s)
- D L Meyer
- Division of Animal Sciences, University of Missouri, Columbia, 65211, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
McKenna DR, Roebert DL, Bates PK, Schmidt TB, Hale DS, Griffin DB, Savell JW, Brooks JC, Morgan JB, Montgomery TH, Belk KE, Smith GC. National Beef Quality Audit-2000: survey of targeted cattle and carcass characteristics related to quality, quantity, and value of fed steers and heifers. J Anim Sci 2002; 80:1212-22. [PMID: 12019608 DOI: 10.2527/2002.8051212x] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The National Beef Quality Audit-2000 was conducted to assess the current status ofthe quality and consistency of U.S. fed steers and heifers. Between May and November 2000, survey teams assessed hide condition (n = 43,415 cattle for color, brands, mud/manure), bruises (n = 43,595 carcasses), offal and carcass condemnation (n = 8,588 cattle), and carcass quality and yield information (n = 9,396 carcasses) in 30 U.S. beef packing plants. Hide colors were black (45.1%), red (31.0%), yellow (8.0%), Holstein (5.7%), gray (4.0%), white (3.2%), brown (1.7%), and brindle (1.3%). Brand frequencies were no (49.3%), one (46.2%), and two or more (4.4%), and brands were located on the butt (36.3%), side (13.7%), and shoulder (3.6%). Most cattle had no (18.0%) or a small amount (55.8%) of mud/manure on their hides, and they had no (77.3%) horns. Most carcasses (53.3%) were not bruised, 30.9% had one bruise, and 15.8% had multiple bruises. Bruise location and incidence were round (14.9%), loin (25.9%), rib (19.4%), chuck (28.2%), and brisket, flank, and plate (11.6%). Condemnation item and incidence were liver (30.3%), lungs (13.8%), tripe (11.6%), heads (6.2%), tongues (7.0%), and carcasses (0.1%). Carcass evaluation revealed these traits and frequencies: steer (67.9%), heifer (31.8%), and bullock (0.3%) sex-classes; dark-cutters (2.3%); A (96.6%), B (2.5%), and C or older (0.9%) overall maturities; and native (90.1%), dairy-type (6.9%), and Bos indicus (3.0%) breed-types. Mean USDA yield grade traits were USDA yield grade (3.0), carcass weight (356.9 kg), adjusted fat thickness (1.2 cm), longissimus muscle area (84.5 cm2), and kidney, pelvic, and heart fat (2.4%). USDA yield grades were Yield Grade 1 (12.2%), Yield Grade 2 (37.4%), Yield Grade 3 (38.6%), Yield Grade 4 (10.4%), and Yield Grade 5 (1.3%). Mean USDA quality grade traits were USDA quality grade (Select85), marbling score (Small23), overall maturity (A66), lean maturity (A65), and skeletal maturity (A67). Marbling score distribution was Slightly Abundant or higher (2.3%), Moderate (4.8%), Modest (13.1%), Small (33.3%), Slight (43.3%), and Traces (3.4%). USDA quality grades were Prime (2.0%), Choice (49.1%), Select (42.3%), Standard (5.6%), and Commercial, Utility, Cutter, and Canner (0.9%). This information will help the beef industry measure progress compared to the past two surveys and will provide a benchmark for future educational and research activities.
Collapse
Affiliation(s)
- D R McKenna
- Texas Agricultural Experiment Station, Department of Animal Science, Texas A&M University, College Station 77843-2471, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|