scholarly journals PSVII-19 Serial ultrasound measures of implanted and non-implanted feedlot steers to determine carcass endpoints

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 292-293
Author(s):  
Tommy L Perkins ◽  
Flavio Riberio ◽  
Tylo J Kirkpatrick ◽  
Kaitlyn R Wesley ◽  
Sierra L Pillmore ◽  
...  
Keyword(s):  
Least Square ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Muscle Area ◽  
Final Body Weight ◽  
Start Date ◽  
Feedlot Steers ◽  
Fat Thickness ◽  
Growth Promoting ◽  
Implant Treatment

Abstract An Aloka SSD-500V real-time ultrasound unit, equipped with a 17.2cm carcass probe, was used to serially scan feedlot steers (n = 80; initial BW 271 ± 99) at 42-d intervals during a 378-d feeding period by a certified Ultrasound Guidelines Council (UGC) technician. This included 10 separate ultrasound scanning sessions following the initial weight and ultrasound data taken on day minus 7 (one week prior to initial start date). Steers were randomly assigned to implant treatment (REV) or not (CON) at day -7 with the implanted group being re-implanted on day 190. Cattle were weighed and scanned for 12th-rib fat thickness (FTU), 12th-rib longissimus muscle area (LMAU), percentage intramuscular fat (%FATU), and rump fat thickness (RFU) to determine the ability of ultrasound to predict carcass grading outcomes at harvest in implanted vs non-implanted steers. Eight steers were harvested each 42 days and evaluated 48h after harvest to determine final body weight (FBW), 12th-rib fat thickness (FTC), 12th-rib longissimus muscle area (LMAC), and marbling score (MARB). Data were analyzed to determine treatment (TRT) and days on feed (DOF) interactions using the GLIMMIX procedure. Least square (LS) means illustrated differences (P < 0.05) between TRT for FBW, FTU, REAU, and %FATU. No differences (P = 0.088) between TRT for RFU were observed. Differences (P < 0.05) between DOF were observed for FBW through all 10 weigh days. A difference (P < 0.05) across DOF for days 42, 84, 126, 168, 210, 252, and 294 was noted for FTU. These data suggest growth promoting implants cause differences (increases) in weight and traditional ultrasound measures of carcass endpoints.

scholarly journals PSIX-27 Evaluation of real-time ultrasound to predict pre-harvest market endpoints in serial slaughtered British x Continental steers administered an E2+TBA implant treatment vs non-implanted controls

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 331-332
Author(s):  
Becca B Grimes ◽  
Tylo J Kirkpatrick ◽  
Travis Tennant ◽  
Ty Lawrence ◽  
Kimberly B Cooper ◽  
...  
Keyword(s):  
Real Time ◽  
Pearson Correlation ◽  
Longissimus Muscle ◽  
Marbling Score ◽  
Muscle Area ◽  
Start Date ◽  
Fat Thickness ◽  
Positive Correlations ◽  
Implant Treatment ◽  
Strong Relationships

Abstract Steers (n = 80; initial BW 271 ± 99) were serially scanned at 42-d intervals during a 378-d feeding period using an Aloka 500 device by a certified Ultrasound Guidelines Council (UGC) technician using real-time ultrasound. This included 10 separate ultrasound scanning sessions following the initial weight and ultrasound data taken on day minus 7 (one week prior to initial start date). Steers were randomly assigned to implant treatment (either implanted with Revalor XS or not) at day -7. Cattle were weighed and scanned for 12th-rib fat thickness (FTU), 12th-rib longissimus muscle area (LMAU), percentage intramuscular fat (%FATU), and rump fat thickness (RFU) to determine the ability of ultrasound to predict carcass grading outcomes at harvest. Scans were processed by CUP Lab technicians. Eight steers were harvested each 42 days. Carcasses were assessed 48h after harvest to determine 12th-rib fat thickness (FTC), 12th-rib longissimus muscle area (LMAC), and marbling score (MARB). Data were analyzed via Pearson correlation and linear regression to determine the relationship of ultrasound measures to carcass outcomes. Positive correlations (P < 0.01) between ultrasound measures taken the day before harvest and carcass measurements indicated strong relationships between FTU and FTC (r = 0.91), LMAU and LMAC (r = 0.93), and moderately strong relationships between %FATU and MARB (r = 0.76). Prediction equations were generated to estimate FTC = .0088 + (1.02585 x FTU), LMAC = 16.29720 + (0.77197 x LMAU) and MARB = 19.87510 + (5.19832 x %FATU). Results suggest real-time ultrasound data provides an effective tool to estimate carcass outcomes pre-harvest.

scholarly journals PSIV-B-28 Late-Breaking: Performance and carcass quality of Nelore bull’s progenies with contrasting traits for precocity, growth and muscularity

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 319-321
Author(s):  
Taiane S Martins ◽  
Juliana Silva ◽  
Lenise Mueller ◽  
Tamyres Amorim ◽  
Annelise Aila G Lobo ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Average Daily Gain ◽  
Backfat Thickness ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Final Body Weight ◽  
Fat Thickness ◽  
Nelore Cattle ◽  
Daily Gain

Abstract The goal of this study was to evaluate the performance and the carcass traits of Nelore cattle progenies from bulls selected by contrasting traits for precocity, growth and muscularity, through the Expected Progeny Difference (EPD). One hundred and five Nelore bulls (initial weight of 350kg±15kg) and 20 months of age were confined and fed with same diet (73% of concentrate). Thirty-two animals were selected to create the contrasting groups for precocity, growth and muscularity (16 animals assigned as a low EPD group - LEPD and 16 animals assigned as a high EPD group - HEPD), based on the EPD of their parents. The ribeye area and backfat thickness were performed by ultrasonography of 12–13th rib fat thickness and longissimus muscle area (LMA), as well as rump fat thickness (RF) measurements. Animals were harvested after 100 days and during the deboning, meat cuts were weight for cutting yield. The animals selected for the HEPD group had greater average daily gain (P = 0.006), which can be explained by the higher feed intake (P = 0.006). However, there are no difference between groups for the final body weight (P = 0.254) and feed efficiency (P = 0.715). The LEPD group presented higher dressing percentage (P = 0.028). Although the groups evaluated did not presented difference in LMA (P = 0.329) and weight of longissimus muscle (P = 0.480), the weight of rump displayed heaviest in the HEPD (P = 0.037). There was no difference between groups for RF (P = 0.086). Nevertheless, backfat thickness was higher in HEPD group (P = 0.006). The present study indicates that Nelore cattle progenies, with parents displaying higher potential for precocity, growth, and muscularity, show greater backfat thickness and weightiest of rump than the other genetic backgrounds. Thanks to FAPESP for the scholarship (Grant # 2017/02349–1).

Evaluation of ultrasound for prediction of carcass fat thickness and longissimus muscle area in feedlot steers

1992 ◽  
Vol 70 (1) ◽  
pp. 29-37 ◽  
Author(s):  
M. T. Smith ◽  
J. W. Oltjen ◽  
H. G. Dolezal ◽  
D. R. Gill ◽  
B. D. Behrens
Keyword(s):  
Longissimus Muscle ◽  
Muscle Area ◽  
Feedlot Steers ◽  
Fat Thickness

scholarly journals PSIV-19 Live and carcass production traits for progeny of an F1 USDA Prime – yield grade 1 carcass clone sire in comparison with progeny of popular reference sires

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 228-228
Author(s):  
Forest L Francis ◽  
Dean Hawkins ◽  
Gregg Veneklasen ◽  
David Lust ◽  
Ty Lawrence
Keyword(s):  
Carcass Weight ◽  
Morbidity And Mortality ◽  
Longissimus Muscle ◽  
Production Traits ◽  
Marbling Score ◽  
Muscle Area ◽  
Weaning Weight ◽  
High Performing ◽  
Fat Thickness ◽  
Normal Lungs

Abstract The cloning of beef carcasses that grade USDA Prime – Yield Grade 1 (P1) has produced a sire that ranked well against high performing bulls from multiple breeds. An F1 (P1 x P1) sire would ideally exhibit heterosis and outperform its high performing parents. A terminal sire study was conducted comparing progeny of an F1 (P1 x P1) sire (AxG1) against progeny (heifers and steers) of four high performing sires of varying breeds {P1 (Alpha); Angus; Simmental; Angus x Simmental}. Production traits included morbidity and mortality frequencies, weaning weight, and feedlot arrival weight; carcass traits included edible liver and normal lung frequencies, hot carcass weight, longissimus muscle area, 12th rib fat thickness, and marbling score. A completely randomized experimental design was used; data was analyzed using a mixed model with a fixed effect of sire and random effects of harvest date, sex, and pen. Feedlot arrival weight, frequencies of morbidity and mortality, 12th rib fat thickness, and frequency of grading Certified Angus Beef or USDA Select did not differ (P ≥ 0.16) between sires. Weaning weight and frequency of normal lungs tended (P ≤ 0.08) to differ amongst sires. Differences in hot carcass weight (P < 0.01), longissimus muscle area (P < 0.01), marbling score (P < 0.01), and frequencies of normal lungs (P < 0.01) was detected among sires. Additionally, sire differences in USDA yield grade (P < 0.01), and frequencies of carcasses grading USDA Prime (P < 0.01) and USDA Choice (P < 0.01) were observed. AxG1 progeny exhibited the least 12th rib fat thickness and lowest USDA yield grade in addition to the largest longissimus muscle area, highest marbling score, and greatest frequency of USDA Prime. These data suggest that AxG1 competed extremely well against other high performing industry sires.

scholarly journals 101 Effects of traditional growth-promoting re-implant or long-acting implant programs on growth performance and carcass characteristics of heifers fed for 221 days

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 132-132
Author(s):  
Marshall Streeter ◽  
John Hutcheson ◽  
Wade Nichols ◽  
Brandon Nuttelman ◽  
Grant Crawford ◽  
...  
Keyword(s):  
Growth Performance ◽  
Block Design ◽  
Carcass Characteristics ◽  
Marbling Score ◽  
Muscle Area ◽  
Trenbolone Acetate ◽  
Fat Thickness ◽  
Initial Processing ◽  
Long Acting ◽  
Implant Treatment

Abstract Beef heifers (n=1478) were used in a randomized complete block design to compare the effects of a traditional re-implant (Revalor-IH/Revalor-200) or a long-acting implant program (Revalor-XH) on feed yard growth performance and carcass characteristics. Heifers (initial BW = 263 kg; SD = 3.44 kg) were randomized to 1 of 20 pens with pens randomly assigned to Revalor-IH (80 mg trenbolone acetate [TBA], 8 mg estradiol [E]) at initial processing followed by Revalor-200 (200 mg TBA, 20 mg E; Rev-IH/200) 103 days later or Revalor-XH (200 mg TBA, 20 mg E; Rev-XH) implant treatments. Heifers were on feed for an average of 221 d with Rev-XH heifers remaining in their pens for the duration of the study. Final BW (559 kg) and feed efficiency (0.175) did not differ (P > 0.11) between treatments. Dry matter intake was greater (P < 0.10) for Rev-IH/200 (7.70 kg) compared with Rev-XH (7.60 kg) heifers causing greater (P < 0.10) ADG for Rev-IH/200 (1.35 kg) versus Rev-XH (1.33 kg). Heifers implanted with Rev-IH/200 (365 kg) had greater (P < 0.10) HCW than those implanted with Rev-XH (361 kg). However, differences in dressing percentage were not detected (P > 0.15). Longissimus muscle area was greater (P < 0.05) for heifers implanted with Rev-IH/200 (89.55 cm2) versus those implanted with Rev-XH (87.87 cm2). Back fat thickness (1.76 cm), calculated yield grade (3.28) and marbling score (487) did not differ (P > 0.42) due to implant treatment. Differences resulting from implant treatment in the percentage of carcasses within USDA Quality Grades (P > 0.34) and USDA Yield Grades (P > 0.18) were not observed. Heifers that were re-implanted had improved ADG, DMI and HCW compared with those receiving a long-acting implant with minimal effects on carcass characteristics.

PSIII-8 Sire breed differences for carcass attributes in feedlot steers using ultrasound technology

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 291-291
Author(s):  
Harley Buie ◽  
Noah P Jesko
Keyword(s):  
Pearson Correlation ◽  
Marbling Score ◽  
Live Animal ◽  
Feedlot Steers ◽  
Significant Difference ◽  
Ultrasound Measurements ◽  
Ribeye Area ◽  
Ultrasound Technology ◽  
Fat Thickness ◽  
Sire Breed

Abstract Live animal ultrasound measurements were taken on thirty-two feedlot steers and heifers for estimation of carcass endpoints including 12th rib fat thickness (FTU), ribeye area (REAU) and intramuscular fat (%FatU). Ultrasound measurements were collected by an inexperienced technician using an Aloka 500 ultrasound unit using Beef Image Analysis (BIA) software. The objective of the study was to evaluate carcass differences of four sire breed types including Angus (n = 11), Ultrablack (n = 6), Nelore (n = 6), Braunvieh (n = 1) and Angus X Nelore X Braunvieh hybrid (n = 8). Carcass data collected at harvest included 12th rib fat Thickness (FTC), Ribeye area (REAC), marbling score (MS), Yield Grade (YG), and Quality Grade (QG). The data were analyzed using SAS to determine breed effects. Means for FTU, FTC, REAU, REAC, %FatU and MS were 0.59 cm, 0.57 cm, 90.80 cm2, 83.53 cm2, 4.83%, and 483.75, respectively. There was no significant difference (P > 0.05) in YG and FT due to breed of sire. However, there was a trend for sire breed for ribeye area (P = 0.0728) for Angus X Nelore X Braunvieh cross and MS (P = 0.0786) for Ultrablack. Pearson correlation values between FTU and FTC, REAU and REAC, and %FatU and MS were 0.1217 (P = 0.05068), 0.3545 (P = .0465) and 0.5161 (P = 0.0025), respectively. These data suggest little differences existed in carcass attributes between various sire breeds out of a set of crossbred commercial cows.

scholarly journals Selection for higher body weight in Nelore cattle is effective in achieving an increase of longissimus muscle area without reducing subcutaneous fat thickness

2012 ◽  
Vol 41 (6) ◽  
pp. 1426-1432 ◽  
Author(s):  
Tiago Roque Pinheiro ◽  
Maria Eugênia Zerlotti Mercadante ◽  
Lucia Galvão de Albuquerque ◽  
Sarah Figueiredo Martins Bonilha ◽  
Fábio Morato Monteiro
Keyword(s):  
Body Weight ◽  
Subcutaneous Fat ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Subcutaneous Fat Thickness ◽  
Fat Thickness ◽  
Selection For ◽  
Nelore Cattle

scholarly journals PSIX-24 Comparison of serial real-time A-mode vs. B-mode ultrasound fat depth measures on prediction of final carcass value endpoints

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 332-332
Author(s):  
Chandler A Dockray ◽  
Tommy L Perkins ◽  
Flavio Riberio ◽  
Tylo J Kirkpatrick ◽  
Kaitlyn R Wesley ◽  
...  
Keyword(s):  
Real Time ◽  
Feeding Period ◽  
Ultrasound Scanning ◽  
Marbling Score ◽  
Trenbolone Acetate ◽  
Total Percentage ◽  
Ultrasound Measurements ◽  
Fat Thickness ◽  
Growth Promoting ◽  
Positive Correlations

Abstract Charolais x Angus steers (n = 80) were evaluated across a 378-day feeding period in response to administration of a growth promoting implant containing trenbolone acetate (TBA) and estradiol (E2) using A-mode and B-mode ultrasound. Steers were scanned at 42-d intervals (0, 42, 84, 126, 168, 210, 252, 294, 336) during 10 separate ultrasound scanning sessions 24-h prior to harvest. Ultrasound B-mode rump fat images (BRFU) were obtained by a certified Ultrasound Guidelines Council (UGC) technician using an ALOKA 500V console equipped with a 17.2 cm carcass probe. Ultrasound A-mode images (ARFU) were obtained by a non-UGC certified technician using a RENCO Lean Meater. Images of BRFU were analyzed by the CUP lab whereas ARFU image results were determined chute side by the scanning technician. Carcasses were dissected into total lean, fat and bone post-harvest. Rump fat thickness ultrasound measurements were compared to carcass traits used to determine carcass value. Carcass endpoints included 12th–rib fat thickness (FTC), 12th rib-eye area (REAC), marbling score (MARB), and total percentage of carcass fat (PCF). The correlation between BRFU and ARFU was 0.70 (P < 0.01). Positive correlations (P < 0.01) between ultrasound rump fat measures taken the day before harvest and carcass measurements indicated moderate relationships between BRFU and FTC (r=0.80); BRFU and REAC (r=0.66); BRFU and MARB (r=0.68); BRFU and PCF (r=0.75); ARFU and FTC (r=0.69); ARFU and REAC (r=0.76); ARFU and MARB (r=0.79); and ARFU and PCF (r=0.80). These results indicate A- and B-mode ultrasound measures of rump fat may be adequate measures for estimation of total percent carcass fat.

scholarly journals Changes of Longissimus Muscle Area and Rump Fat Thickness in Hungarian Simmental Fattening Bulls Measured Using Real-Time Ultrasound Equipment

2005 ◽  
pp. 11-15
Author(s):  
János Tőzsér ◽  
Gabriella Holló ◽  
István Holló ◽  
János Seregi ◽  
Andrea Szentléleki ◽  
...  
Keyword(s):  
Real Time ◽  
Cattle Breed ◽  
Live Weight ◽  
Longissimus Muscle ◽  
Muscle Area ◽  
Lower Body Weight ◽  
Pricing System ◽  
Ultrasonic Measurements ◽  
Fat Thickness ◽  
Simmental Cattle

The aim of the authors was to evaluate changes in the longissimus muscle area (LMA) and rump fat thickness (P8) based on real-time ultrasound scanning in the Hungarian Simmental cattle breed. Ultrasonic measurements were carried out on the same 11 Hungarian Simmental fattening bulls by Falco 100 (Pie Medical) equipment (I.: age: 357±23.47 days, live weight: 475.55±51.40 kg; II.: age: 418±23.47 days, live weight: 555.10±54.11 kg) on two occasions. Animals were kept in small groups, on deep litter, and fed on silage and concentrate. LMA and P8 were measured on the scans, between the 12th and 13th ribs by manual outlining. Results for the investigated traits during the examinations were as follows: P8: I.: 0.373±0.154 cm, II.: 0.624±0.161 cm; LMA: I.: 65.72±5.89 cm2, II.: 71.74±8.94 cm2. During the fattening period, P8 increased significantly (I-II.: t=3.73, P<0.001). A significant positive correlation was calculated between results of measurements I. and II. in the case of LMA (r=0.71, P<0.05). Results imply the possibility of selling bulls with smaller LMA earlier, at lower body weight. Application of ultrasonic measurements in fattening technology could generate a more quality-related pricing system.

Lamb fat thickness and longissimus muscle area measured by a computerized ultrasonic system

1997 ◽  
Vol 26 (3) ◽  
pp. 277-282 ◽  
Author(s):  
C. Fernández ◽  
L. Gallego ◽  
A. Quintanilla
Keyword(s):  
Longissimus Muscle ◽  
Muscle Area ◽  
Fat Thickness
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