Hide Defects of Feedlot Cattle: Assessment of Cattle Management, Breed Type, Sex, Live Market Weight, and Source Factors on Hide Quality

2021 ◽  
Vol 116 (4) ◽  
Author(s):  
W. T. Wright ◽  
C. R. Richardson ◽  
M. A. Bonds ◽  
G. V. Pollard ◽  
P. O. Sudharkaran ◽  
...  
Keyword(s):  
Live Weight ◽  
Feeding Practices ◽  
Feedlot Cattle ◽  
Carcass Weight ◽  
Breed Type ◽  
Cattle Feeding ◽  
Cattle Management

Twenty groups of finished feedlot cattle (thirteen steer groups, seven heifer groups) of known origin, breed type, sex and implant status were studied after marketing to determine the type and extent of hide defects as related to days on feed, live market weight, and hot carcass weight. Origin of cattle did not significantly influence the five hide characteristics evaluated (hide defects score, hide vein score, healed scratches, ringworm, and warts). Live weight and sex influenced the weight of the hides (P < 0.05), with steers being heavier and having heavier hides. Days on feed increased (P = 0.06) the amount of vein damage observed on the hides but was not sex related. Results from this study indicate that under typical commercial cattle feeding practices in Texas, hide defects differ among cattle under the same management and are related to the days on feed in the feedlot, which influences final market weight and degree of finish.

scholarly journals Feed efficiency and carcass metrics in growing cattle1

2019 ◽  
Vol 97 (11) ◽  
pp. 4405-4417 ◽  
Author(s):  
David N Kelly ◽  
Craig Murphy ◽  
Roy D Sleator ◽  
Michelle M Judge ◽  
Stephen B Conroy ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Production Efficiency ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Live Weight ◽  
Residual Energy ◽  
Feedlot Cattle ◽  
Carcass Weight ◽  
Research Perspective ◽  
Dressing Percentage

Abstract Some definitions of feed efficiency such as residual energy intake (REI) and residual gain (RG) may not truly reflect production efficiency. The energy sinks used in the derivation of the traits include metabolic live-weight; producers finishing cattle for slaughter are, however, paid on the basis of carcass weight, as opposed to live-weight. The objective of the present study was to explore alternative definitions of REI and RG which are more reflective of production efficiency, and quantify their relationship with performance, ultrasound, and carcass traits across multiple breeds and sexes of cattle. Feed intake and live-weight records were available on 5,172 growing animals, 2,187 of which also had information relating to carcass traits; all animals were fed a concentrate-based diet representative of a feedlot diet. Animal linear mixed models were used to estimate (co)variance components. Heritability estimates for all derived REI traits varied from 0.36 (REICWF; REI using carcass weight and carcass fat as energy sinks) to 0.50 (traditional REI derived with the energy sinks of both live-weight and ADG). The heritability for the RG traits varied from 0.24 to 0.34. Phenotypic correlations among all definitions of the REI traits ranged from 0.90 (REI with REICWF) to 0.99 (traditional REI with REI using metabolic preslaughter live-weight and ADG). All were different (P < 0.001) from one suggesting reranking of animals when using different definitions of REI to identify efficient cattle. The derived RG traits were either weakly or not correlated (P > 0.05) with the ultrasound and carcass traits. Genetic correlations between the REI traits with carcass weight, dressing difference (i.e., live-weight immediately preslaughter minus carcass weight) and dressing percentage (i.e., carcass weight divided by live-weight immediately preslaughter) implies that selection on any of the REI traits will increase carcass weight, lower the dressing difference and increase dressing percentage. Selection on REICW (REI using carcass weight as an energy sink), as opposed to traditional REI, should increase the carcass weight 2.2 times slower but reduce the dressing difference 4.3 times faster. While traditionally defined REI is informative from a research perspective, the ability to convert energy into live-weight gain does not necessarily equate to carcass gain, and as such, traits such as REICW and REICWF provide a better description of production efficiency for feedlot cattle.

scholarly journals Effects of various doses of lubabegron on calculated ammonia gas emissions, growth performance, and carcass characteristics of beef cattle during the last 56 days of the feeding period

2021 ◽  
Author(s):  
J C Kube ◽  
B P Holland ◽  
A B Word ◽  
J B Allen ◽  
M Calvo-Lorenzo ◽  
...  
Keyword(s):  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Feedlot Cattle ◽  
Carcass Weight ◽  
Receptor Subtype ◽  
Receptor Subtypes ◽  
Feeding Period ◽  
Ammonia Gas ◽  
Gas Emissions

Abstract Lubabegron (LUB; Experior, Elanco, Greenfield, IN, USA) was approved by the U.S. Food and Drug Administration in 2018 and is indicated for the reduction of ammonia (NH3) gas emissions·kg-1 BW and HCW when fed to feedlot cattle during the final 14 to 91 d of the finishing period. Lubabegron demonstrates antagonistic behavior at the β1 and β2 receptor subtypes and agonistic behavior at the β3 receptor subtype in cattle and is classified by the Center of Veterinary Medicine (CVM) as a ‘beta-adrenergic agonist/antagonist’. This report describes a randomized complete block study that evaluated LUB dose (0, 1.5, 3.5, and 5.5 mg·kg-1 DM) during the last 56 d of the feeding period on calculated NH3 gas emissions, live weight, carcass weight, and associated ratios in beef feedlot cattle. Carcass characteristics, mobility, and health were also evaluated. All cattle received monensin and tylosin throughout the study. Ammonia gas emissions were calculated using the equation developed by Brown et al. (2019). The reduction in calculated cumulative NH3 gas emissions with LUB ranged from 1.3 to 11.0% (85 to 708 g/hd). When NH3 gas emissions were expressed on a live weight (unshrunk) and carcass weight basis, calculated NH3 gas emissions decreased by 3.0 to 12.8% and 3.8 to 14.6%, respectively. Daily dry matter intake (DMI) was 2.3% greater (Ptrt &lt; 0.05) for steers that received LUB. Average daily gain (ADG) was 13.7% greater (Ptrt &lt; 0.05; 1.68 vs 1.91 kg), while gain efficiency was 10.8% greater (Ptrt &lt; 0.05; 0.167 vs 0.185) for steers fed LUB. Animal mobility was scored in the pen approximately 1 wk prior to harvest, when cattle were loaded on trucks scheduled for harvest, and at antemortem inspection during lairage. No treatment differences (Ptrt ≥ 0.170) were observed at any time for the percent of cattle receiving mobility scores of 1 or 2 (normal or minor stiffness but moving with the normal cattle, respectively). Cattle mobility scored as a 1 or 2 equaled or exceeded 92% at all times. Final BW and HCW increased (Ptrt &lt; 0.05) 11.6 to 15.7 kg and 11.3 to 17.1 kg, respectively, in cattle receiving LUB compared to cattle receiving monensin plus tylosin alone.

Population-level analysis of antibiotic use and death rates in beef feedlots over ten years in three cattle-feeding regions of the United States

2021 ◽  
pp. 1-7
Author(s):  
Stephanie C. Rutten-Ramos ◽  
Shabbir Simjee ◽  
Michelle S. Calvo-Lorenzo ◽  
Jason L. Bargen
Keyword(s):  
Death Rate ◽  
Live Weight ◽  
Population Level ◽  
Antibiotic Use ◽  
The United States ◽  
Death Rates ◽  
Cattle Feeding ◽  
The Us ◽  
Rate Ratios ◽  
Beef Feedlots

Abstract OBJECTIVE To assess antibiotic use and other factors associated with death rates in beef feedlots in 3 regions of the US over a 10-year period. SAMPLE Data for 186,297 lots (groups) of finished cattle marketed between 2010 and 2019 were obtained from a database representing feedlots in the central, high, and north plains of the US. PROCEDURES Descriptive statistics were generated. Generalized linear mixed models were used to estimate lot death rates for each region, sex (steer or heifer), and cattle origin (Mexico or the US) combination. Death rate was calculated as the (number of deaths/number of cattle placed in the lot) × 100. Lot antibiotic use (TotalActiveMG/KGOut) was calculated as the total milligrams of active antibiotics assigned to the lot per live weight (in kilograms) of cattle marketed from the lot. Rate ratios were calculated to evaluate the respective associations between lot death rate and characteristics of cattle and antibiotic use. RESULTS Mean death rate increased during the 10-year period, peaking in 2018. Mean number of days on feed also increased over time. Mean TotalActiveMG/KGOut was greatest in 2014 and 2015, lowest in 2017, and moderated in 2018 and 2019. Death rate was positively associated with the number of days on feed and had a nonlinear association with TotalActiveMG/KGOut. Feeding medicated feed articles mitigated death rate. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested a balance between disease prevention and control in feedlots for cattle with various risk profiles. Additional data sources are needed to assess TotalActiveMG/KGOut across the cattle lifetime.

An evaluation of beef carcass quality 2. Influence of variation in grazing intensity and the level of barley supplementation with silage on the carcass and meat quality of Friesian steers

1972 ◽  
Vol 15 (3) ◽  
pp. 229-237
Author(s):  
C. E. Hinks ◽  
J. H. D. Prescott
Keyword(s):  
Meat Quality ◽  
Compensatory Growth ◽  
Live Weight ◽  
Grazing Intensity ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Eating Quality ◽  
Winter Period ◽  
Carcass Quality

SUMMARYTwo experiments concerning the effects, on the carcass and meat characteristics of 18-months-old Friesian steers, of variation in grazing intensity and the level of barley feeding with silage are reported.Groups of 12 steers were grazed at different intensities over 5-month grazing periods, such that live-weight differences of 38 kg and 16 kg were recorded at housing. No compensatory growth was recorded during the subsequent winter feeding period.Whilst the grazing treatments had little effect on carcass or meat quality, higher levels of barley feeding with silage over the winter period (710 v. 410 kg/steer) had significant effects on live-weight gain, and increased carcass weight by 21 kg at slaughter. The higher yield of carcass weight was reflected in significant differences in carcass composition, joint proportions and retail cut-out value. Sixty per cent of the carcass weight difference was removed as trim fat. Differences in carcass fatness were not associated with any differences in eating quality.

Effects of the percentage of Texel or Rouge de ľOuest genes in lambs on carcass characteristics and meat quality

1999 ◽  
Vol 69 (1) ◽  
pp. 81-92 ◽  
Author(s):  
A. F. Carson ◽  
B. W. Moss ◽  
R. W. J. Steen ◽  
D. J. Kilpatrick
Keyword(s):  
Meat Quality ◽  
Subcutaneous Fat ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Fat Content ◽  
Carcass Weight ◽  
Ewe Lambs ◽  
Bone Content ◽  
Intermuscular Fat ◽  
Ram Lambs

AbstractThis study investigated the effects of the percentage of Texel or Rouge de l’Ouest (Rouge) genes in lambs (0, 50, 75 or 100%; the remainder being Greyface (Border Leicester × Scottish Blackface)) on lamb carcass characteristics and meat quality. Ewe lambs were slaughtered at 34, 40, 46 and 52 kg and ram lambs were slaughtered at 40, 46, 52 and 58 kg live weight. Dressing proportion increased (P < 0·001) by 0·53 and 0·27 g carcass weight per kg live weight for each 1% increase in Texel or Rouge genes respectively. Carcass conformation classification increased (P < 0·001) by 0·016 and 0·007 units (on a five-point scale) for each 1% increase in Texel or Rouge genes respectively. Carcass fat depth measures were reduced by Texel and Rouge genes such that at a constant fat depth end point, carcass weight could be increased by 0·029 and 0·023 kg for each 1% increase in Texel or Rouge genes. Carcass lean content increased (P < 0·001) by 0·99 and 0·27 g/kg for each 1% increase in Texel or Rouge genes. Subcutaneous fat content was reduced (P < 0·001) by 0·36 and 0·29 g/kg for each 1% increase in Texel or Rouge genes. Intermuscular fat content was reduced (P < 0·01) by 0·38 g/kg per 1% increase in Texel genes, whereas Rouge genes had no effect. Similarly, bone content was reduced (P < 0·01) by Texel genes only (0·31 g/kg per 1% increase in Texel genes). Warner-Bratzler shear force values showed a quadratic effect with increasing Texel and Rouge genes, with an initial decrease from 0 to 50% followed by an increase to 100%. Cooking loss increased (P = 0·05) as the percentage of Rouge genes in lambs increased. Increasing the percentage of Texel or Rouge genes significantly increased L* values (P < 0·01 and P < 0·05 respectively), b* values (P = 0·05 and P< 0·05 respectively) and H° values (P < 0·001).

scholarly journals PENGARUH PEMBERIAN RANSUM KOMERSIL DENGAN PENAMBAHAN BAHAN PAKAN LOKAL TERFERMENTASI AMONIUM SULFAT DAN UREA TERHADAP BOBOT HIDUP, BOBOT KARKAS, DAN BOBOT GIBLET ITIK HIBRIDA JANTAN

2020 ◽  
Vol 4 (3) ◽  
pp. 205-210
Author(s):  
Amir Husein ◽  
Rudy Sutrisna ◽  
Dian Septinova
Keyword(s):  
Ammonium Sulphate ◽  
Live Weight ◽  
Animal Husbandry ◽  
University Research ◽  
Carcass Weight ◽  
Research Material ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Male Hybrid ◽  
Level Of Significance

This research aimed to know the influence of giving a commercial ration with addition of local feed fermented with ammonium sulphate and urea and to find out the best ration on live weight, carcass weight, and giblet weight of male hybrid ducks. This research was carried out in July 2018--August 2018 in the cage of ducks, Department of Animal Husbandry, Faculty of Agriculture, Lampung University. Research material used consisted of 40 male hybrid ducks. This study used a Completely Randomized Design (CRD). Data was analysed using analysis of variance at 5% level of significance. The results showed that there was no different effect of treatments on live weight (1,552--1,717 g / duck), carcass weight (805,6--1.016 g / duck), and giblet weight (106.8--118.45 g /duck) of male hybrid ducks. Keywords: Carcass weight, Giblet weight, Live weight, Male hybrid duck.

scholarly journals Pengaruh Substitusi Amtabis yang difermentasi dengan aspergillus niger terhadap Berat dan Persentase Karkas Broiler

2016 ◽  
Vol 1 (1) ◽  
pp. 835-842
Author(s):  
Rifki Marzani ◽  
Herawati Latif ◽  
Samadi Samadi
Keyword(s):  
Aspergillus Niger ◽  
Live Weight ◽  
Animal Husbandry ◽  
Carcass Weight ◽  
Field Laboratory ◽  
Commercial Feed ◽  
Weight Effect ◽  
Agricultural Faculty ◽  
Banda Aceh

Abtrak: Tujuan penelitian ini adalah untuk mengetahui tentang pengaruh substitusi amtabis yang difermentasi dengan Aspergillus niger (A.niger) terhadap berat dan persentase karkas broiler. Penelitian ini dilakukan di Laboratorium Lapangan Peternakan Fakultas Pertanian Universitas Syiah Kuala yang berlokasi di Desa Kopelma Darussalam Banda Aceh sejak tanggal 4 Desember 2015 sampai dengan tanggal 9 Januari 2016. Parameter yang diukur adalah berat hidup, berat karkas, persentase karkas, berat potongan karkas, persentase potongan karkas. Hasil penelitian menunjukkan bahwa substitusi Amtabis dengan ransum komersial berpengaruh sangat nyata (P0,01) terhadap berat hidup dan berat karkas, namun tidak berpengaruh nyata terhadap persentase karkas. Pada penambahan Amtabis dengan level 6% cenderung menaikkan berat hidup, berat dan persentase karkas tetapi tidak melebihi kontrol. Pengaruh substitusi Amtabis terhadap berat dan persentase bagian-bagian karkas menunjukkan pengaruh yang nyata pada berat sayap, berat paha atas dan berat paha bawah.Effect of Substitution Amtabis Fermented with Aspergillus niger on the Weight and the Percentage of Carcass Broiler Abstrack: The purpose of this study was to obtain information about the effect of substitution amtabis fermented with Aspergillus niger (A.niger) on broiler weight and the percentage of carcass. This research was conducted at the Field Laboratory of Animal Husbandry Department,  Agricultural Faculty, Syiah Kuala Universtiy Darusslam, Banda Aceh from December 4, 2015 to January 9, 2016. Parameters measured in this study were live weight, carcass weight, carcass percentage, pieces of carcass weight, carcass percentage cuts. The results showed that the substitution of Amtabis in commercial rations significant effect (P0,05) on live weight and carcass weight, but not influenced (P0,05) on carcass percentage. Substitution of Amtabis at the level of 6% on commercial feed tended to increase live weight, carcass weight and percentages but still not above control weight. Effect of substitution Amtabis on weight and cut-up pieces of broiler carcass showed significantly influenced on the weight of the wings, tights and drum sticks

scholarly journals Indicators of the Internal Environment of Beef Cattle during Fattening and their Correlation to the Quality of Beef

2008 ◽  
Vol 77 (4) ◽  
pp. 539-546 ◽  
Author(s):  
A. Pavlík ◽  
R. Filipčík ◽  
P. Jelínek ◽  
M. Bjelka ◽  
Z. Havlíček ◽  
...  
Keyword(s):  
Blood Plasma ◽  
Plasma Cholesterol ◽  
Live Weight ◽  
Inorganic Phosphorus ◽  
Meat Tenderness ◽  
Internal Environment ◽  
Veterinary Research ◽  
Cattle Management ◽  
Physiological Values ◽  
The Individual

The objective of the study was to determine selected indicators of the internal environment in individual cattle categories during the period of fattening to evaluate the relation of the individual blood components to the growth intensity and qualitative indicators of the meat. The trial involved half-siblings - bulls, heifers and steers housed in one stable. The threesome always had a common father. During the trials the live weight was monitored and blood samples were taken on days 310, 403, 448, 479, 512, 554 and 618 of age. The concentrations of total proteins, glucose, total cholesterol, urea and catalytic concentrations of ALP, ALT, AST, calcium, inorganic phosphorus, magnesium and copper in the blood plasma were assessed. In all cases the levels of indicators of the internal environment were within the range of the physiological values for the respective age category. Compared to bulls and steers, the concentration of total plasma cholesterol of the heifers was significantly higher (p < 0.05 and p < 0.01, respectively). The last samples were taken prior to slaughter of the animals and the individual components were correlated with the nutritional values and meat indicators; the correlation between the amount of glucose and urea in the blood serum and the tenderness of the meat was significant (p < 0.05 and p < 0.01). The correlation between the concentration of proteins in the blood plasma, the level of nitrogen or total protein in the muscles, the water-holding capacity and meat tenderness was positive. The study provides a basis for implementing helpful adjustments in current cattle management practises. Blood indicators presented in this paper can be added to existing knowledge to benefit veterinary research and clinical evaluations.

Effects of growth pathway on beef quality in 18-month-old Angus and South Devon ✕ Angus pasture-fed steers

2001 ◽  
Vol 72 (2) ◽  
pp. 297-308 ◽  
Author(s):  
P.D. Muir ◽  
N.B. Smith ◽  
P.M. Dobbie ◽  
D.R. Smith ◽  
M.D. Bown
Keyword(s):  
Meat Quality ◽  
Compensatory Growth ◽  
Live Weight ◽  
Considerable Effect ◽  
Growth Restriction ◽  
Carcass Weight ◽  
Winter Period ◽  
Meat Tenderness ◽  
Beef Quality ◽  
Significant Difference

AbstractThere is evidence that, in cattle, rapid compensatory growth after a period of growth restriction may increase the variability of beef quality and that variability is greater in breeds which reach larger body size at maturity. This experiment investigated the effect of compensatory growth following a period of winter growth restriction on carcass quality in steers of small and large mature size grazed on pasture. Angus (no. = 120) and South Devon ✕ Angus (SD✕ A; no. = 110) steers were allocated to non-restricted or restricted growth treatment groups and for 126 days over winter their grazing was managed to achieve mean live-weight gains of approximately 0·7 kg/day or to maintain live weight for each group respectively. Steers were slaughtered at the start (no. = 10 per breed) and end (no. = 20 per nutrition group (10 from each breed)) of the winter period for carcass evaluation. Thereafter, remaining steers were grazed together at a high pasture allowance to maximize growth and were slaughtered for carcass evaluation as they reached target live weights (Angus, 590 kg; SD✕ A, 620 kg). SD✕ A steers grew faster (P< 0·05) during both the winter and finishing periods and reached target slaughter live weights approximately 20 days earlier than Angus steers. SD✕ A steers also had leaner carcasses than Angus steers at each slaughter although there was no significant difference in meat quality between breeds. However, there was a significant effect of restriction treatment on carcass weight and meat quality. The non-restricted steers grew faster, had heavier carcasses and more tender steaks than restricted steers, although there was no significant difference in carcass fatness (adjusted for hot carcass weight). Muscle calpain activities were positively correlated with live-weight gain during the finishing period suggesting increased potential for post-mortem myofibrillar proteolysis and therefore increased meat tenderness. However, in the present experiment this was confounded by an increase in shear force with age-at-slaughter, especially in the non-restricted steers. Nevertheless, steers which were heaviest at the start of the experiment reached slaughter live weight earliest, were leaner than average and had higher calpain system activities at slaughter regardless of breed or restriction treatment. Furthermore, in the non-restricted group, high initial live weight and early slaughter was associated with lower pH and more tender meat. In conclusion, although restriction affected meat quality attributes, it appears that live weight prior to food restriction also had a considerable effect on carcass characteristics at slaughter. Therefore, the characteristics of the early growth phase prior to the finishing period may have important consequences for meat quality.

Hexoestrol implantation of Blackface wether lambs

1959 ◽  
Vol 1 (1) ◽  
pp. 37-40 ◽  
Author(s):  
R. H. Armstrong ◽  
A. E. Cameron
Keyword(s):  
Live Weight ◽  
Carcass Weight ◽  
Control Group ◽  
The Mean ◽  
The Hill

1. Sixty-four Blackface wether lambs, weaned some 8 days previously from the hill were divided into two similar groups. One group of lambs was implanted with 15 mg. hexoestrol.2. The treated lambs had gained an average of 2·32 lb., and 3·88 lb. live-weight more than the control group, after 4 and 7 weeks respectively.3. The mean carcass weight of 23 hexoestrol-implanted lambs was 1·5 lb. greater than that of the same number of untreated lambs.4. Carcass grading provided no evidence of a deterioration in quality as the result of hexoestrol implantation.5. Light lambs responded at least as well as heavy lambs to the hormone.

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