Life Sciences Commons^™

A Comparison Of Melengestrol Acetate Fed At Two Dose Levels To Feedlot Heifers, G. E. Sides, J. T. Vasconcelos, R. C. Borg, O. A. Turgeon, W. C. Koers, M. S. Davis, K. Vander Pol, D. J. Weigel, C. M. Tucker

Panhandle Research and Extension Center

A randomized complete block design was used to compare the effects of feeding melengestrol acetate (MGA) at 0.4 (0.4M) and 0.5 (0.5M) mg/d per head on feedlot performance, estrus activity, and carcass characteristics of commercial beef heifers (n = 1,418; 10 pens/ treatment). Within 48 h of arrival at the research site, heifers were assigned to treatment, processed according to feedlot protocol, and administered an abortifacient. After adaptation to a 95% concentrate diet, MGA was supplied at either 0.4 or 0.5 mg/head daily. Estrus activity was monitored twice daily and summarized as a count of heifers showing estrus within a …

Effect Of Feeding Melengestrol Acetate, Monensin, And Tylosin On Performance, Carcass Measurements, And Liver Abscesses Of Feedlot Heifers, G. E. Sides, R. S. S. Swingle, J. T. Vasconcelos, R. C. Borg, W. M. Moseley

Panhandle Research and Extension Center

Approximately 4,000 yearling heifers (initial BW = 306 ± 1.9 kg) were randomly allotted into 4 treatment groups to determine the effect of melengestrol acetate (MGA) on feedlot performance and carcass parameters. Treatments included a diet containing monensin (Rumensin) and tylosin (Tylan; RT) fed during the entire feeding period; RT plus MGA (RTM) also fed during the entire feeding period; RT withdrawn 35 d preslaughter (RTwd); and RTM withdrawn 35 d preslaughter (RTMwd). All cattle were implanted at arrival with Revalor-IH and reimplanted with Revalor-200, and were fed a standard feedlot finishing diet (that met or exceeded 1996 NRC requirements) …

Temperature Affects Microbial Decomposition Of Cadavers (Rattus Rattus) In Contrasting Soils, David O. Carter, David Yellowlees, Mark Tibbett

Department of Entomology: Faculty Publications

The ecology of soils associated with dead mammals (i.e. cadavers) is poorly understood. Although temperature and soil type are well known to influence the decomposition of other organic resource patches, the effect of these variables on the degradation of cadavers in soil has received little experimental investigation. To address this, cadavers of juvenile rats (Rattus rattus) were buried in one of three contrasting soils (Sodosol, Rudosol, and Vertosol) from tropical savanna ecosystems in Queensland, Australia and incubated at 29 °C, 22 °C, or 15 °C in a laboratory setting. Cadavers and soils were destructively sampled at intervals of …

The Effect Of Concentrate- And Silage-Based Finishing Diets On The Growth Performance And Carcass Characteristics Of Suffolk Cross And Scottish Blackface Lambs, Muhammad Iqbal Mustafa, John P. Chadwick, Pervez Akhtar, Safdar Ali, Muhammad Lateef, Javed Iqbal Sultan

Turkish Journal of Veterinary & Animal Sciences

In the present study 48 Suffolk x Mule (S x M) and 48 Scottish Blackface (SBF) wether lambs were used in a 2 breeds x 2 diets x 4 replications factorial experiment with 6 lambs per pen. Lambs were offered either a concentrate (CONC) finishing diet (DM: 876 g kg^{-1}, estimated ME: 10.9 MJ kg^{-1} of DM, estimated DUP: 32.4 g kg{-1} of DM) ad libitum, together with 100 g hay head^{-1} day^{-1}, or silage (SIL) offered ad libitum (D value: 67.2), together with up to 450 g head^{-1}day^{-1}of a concentrate supplement (DM: 888 g kg^{-1}, estimated ME: 10.9 MJ …

The Effect Of Different Slaughter Weights On The Fattening Performance, Slaughter And Carcass Characteristics Of Male Karayaka Lambs, Faruk Balci, Emi̇n Karakaş

Turkish Journal of Veterinary & Animal Sciences

This experiment was carried out to evaluate the effect of different slaughter weights on the fattening performance, slaughter and carcass characteristics of male Karayaka lambs at approximately 4 months of age. Thirty-six lambs, the initial liveweights of which were around 26.5 kg, were divided into 3 groups according to slaughter weight [(Group 1: 35 kg, n = 12), (Group 2: 40 kg, n = 12) and (Group 3: 45 kg, n = 12)] at the beginning of the fattening period. The average daily gain was 203.1, 214.5 and 195.0 g/day, feed conversion efficiency was 7.3, 8.6 and 8.8 kg, and …

An Evaluation Of Production And Economic Efficiency Of Two Beef Systems From Calving To Slaughter, R. V. Anderson, Richard J. Rasby, Terry J. Klopfenstein, R. T. Clark

Department of Animal Science: Faculty Publications

A 3-yr experiment was conducted with cows and their calves to evaluate resource inputs, animal performance, and carcass characteristics of two production systems. In the control system, cows (CON; n = 99/yr) grazed pasture and were fed hay during the winter, and CON steer calves were finished in the feedlot for 211 d after weaning. In the treatment system (TRT; n = 100/yr), cows grazed pasture and crop residue during the winter and were fed hay. Treatment steer calves grazed crop residue after weaning, grazed pasture in the spring and summer, and were finished in the feedlot for 90 d. …

Rp 357 Quality And Yield Grades For Beef Carcasses, Dennis E. Burson

University of Nebraska-Lincoln Extension: Historical Materials

There are two types of beef grades in the United States--quality grades and yield grades. Beef carcasses may carry a quality grade, a yield grade or both a quality and yield grade.

Quality grades indicate expected palatability or eating satisfaction of the meat; yield grades are estimates of the percentage of boneless, closely trimmed retail cuts from the round, Join, rib and chuck.

Federal meat grading is a voluntary service packers request and pay for on an hourly fee basis. Meat grading should not be confused with meat inspection, which is mandatory and ensures the safety and wholesomeness of our …

Genetic (Co) Variance For Growth And Tenderness Related Traits In Purebred Brahman Steers, Joshua Dean Domingue

LSU Master's Theses

Paternal half-sib groups of Brahman bull calves were purchased at weaning from purebred Brahman producers in Louisiana. Following backgrounding and grazing on ryegrass the steers shipped to a commercial feedlot in south Texas. Steers were slaughtered in groups when they reached an approximate average endpoint weight of 535 kg and 10mm backfat. After a 24 hr chill, carcasses were ribbed, data collected, and a longissimus muscle sample taken for calpastatin assay. Two 2.54 cm thick steaks were randomly removed from the large end of the strip loin, vacuum packaged, and randomly selected for 7 and 14 days of aging. Genetic …

National Pork Producers Council Maternal Line Genetic Evaluation: A Comparison Of Growth And Carcass Traits In Terminal Progeny, J. P. Cassidy, O. W. Robison, R. K. Johnson, J. W. Mabry, L. L. Christian, M. D. Tokach, R. K. Miller, R. N. Goodwin

Department of Animal Science: Faculty Publications

The objective of this study was to compare growth and carcass traits of 1,252 progeny of six commercially available dam lines included in the National Pork Producers Council Maternal Line Evaluation Project. Lines compared included one maternal line supplied by each of American Diamond Swine Genetics (ADSG), Danbred NA (DB), two lines supplied by Monsanto Choice Genetics (DK and GPK347), Newsham Hybrids (NH), and Landrace × Large White females supplied by the National Swine Registry (NSR). All females were mated to DB, Duroc-Hampshire terminal sires. Traits analyzed were ADG from 56 to 115 kg live weight, days to 115 kg, …

Responses To 19 Generations Of Litter Size Selection In The Ne Index Line. Ii. Growth And Carcass Responses Estimated In Pure Line And Crossbred Litters, D. B. Petry, J. W. Holl, R. K. Johnson

Department of Animal Science: Faculty Publications

Our objective was to estimate responses in growth and carcass traits in the NE Index line (I) that was selected for 19 generations for increased litter size. Differences between Line I and the randomly selected control line (C) were estimated in pure line litters and in F₁ and three-way cross litters produced by mating I and C females with males of unrelated lines. Contrasts of means were used to estimate the genetic difference between I and C and interactions of line differences with mating type. In Exp 1, 694 gilts that were retained for breeding, including 538 I and …

Genetic Response To Selection For Weaning Weight Or Yearling Weight Or Yearling Weight And Muscle Score In Hereford Cattle: Efficiency Of Gain, Growth, And Carcass Characteristics, R. M. Koch, L. V. Cundiff, K. E. Gregory, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

An experiment involving crosses among selection and control lines was conducted to partition direct and maternal additive genetic response to 20 yr of selection for 1) weaning weight, 2) yearling weight, and 3) index of yearling weight and muscle score. Selection response was evaluated for efficiency of gain, growth from birth through market weight, and carcass characteristics. Heritability and genetic correlations among traits were estimated using animal model analyses. Over a time-constant interval, selected lines were heavier, gained more weight, consumed more ME, and had more gain/ME than the control. Over a weight-constant interval, selected lines required fewer days, consumed …

Comparison Of Longhorn- And Red Poll-Sired Calves From Crossbred Dams Calving At Two Or Three Years Of Age, X H. Liu, A Perez Marquez, L. V. Cundiff, L. D. Van Vleck

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Calving difficulty, survival from birth to weaning, birth weight, and weaning weight of 167 calves and carcass traits of 88 cattle (63 for adjusted fat thickness) were compared for progeny of Red Poll and Longhorn bulls mated to crossbred cows that calved at 2 or 3 yr of age. Results indicated that Longhornsired calves required 28% less assistance at calving than Red Poll-sired calves when dams calved at 2 yr of age (P<0.05), but there was no difference between Red Poll- and Longhorn-sired calves for calving difficulty with 3- yr-old cows. Red Poll-sired calves had significantly greater birth and weaning BW than did Longhorn-sired calves for 2-yrold dams. Significant differences attributable to sire breed were found only for bone percentage of progeny of 3-yr-old dams, but not for carcass weight, fat thickness, longissimus area, USDA quality grades, and percentages retail product, fat trim, or bone. There was a significant interaction between sire breed and age of dam only for calving difficulty. Within sire breed, calving difficulty of 2- yr-old dams was greater than that for 3- yr-old dams, and calves from 2-yr-old dams also were significantly lighter at weaning than were calves from 3-yr-old dams (P<0 .01).

National Pork Producers Council Maternal Line Genetic Evaluation: A Comparison Of Growth And Carcass Traits In Terminal Progeny, J. D. Cassady, O. W. Berg, Rodger K. Johnson, J. W. Mabry, L. L. Christian, M. D. Tokach, R. K. Miller, R. N. Goodwin

Department of Animal Science: Faculty Publications

The objective of this study was to compare growth and carcass traits of 1,252 progeny of six commercially available dam lines included in the National Pork Producers Council Maternal Line Evaluation Project. Lines compared included one maternal line supplied by each of American Diamond Swine Genetics (ADSG), Danbred NA (DB), two lines supplied by Monsanto Choice Genetics (DK and GPK347), Newsham Hybrids (NH), and Landrace × Large White females supplied by the National Swine Registry (NSR). All females were mated to DB, Duroc-Hampshire terminal sires. Traits analyzed were ADG from 56 to 115 kg live weight, days to 115 kg, …

Case Study: Effects Of Delaying Implant And Programmed Rate Of Gain On Performance And Carcass Characteristics Of Yearling Beef Steers, G. Scaglia, L. W. Greene, F. T. Mccollum, N. A. Cole, T. H. Montgomery

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Ninety-six steers (average BW = 335 ± 36 kg) were allotted in a completely randomized design with a 2 × 2 factorial arrangement of treatments. Factors were 1) implant on d 1 or no implant and 2) ad libitum access to feed on d 1 or programmed-fed for a target BW gain of 1.4 kg/d during the first 62 d of the feeding period. On d 63, all steers were implanted with Revalor-S^® (Hoechst Roussel Vet, Overland Park, KS) and provided ad libitum access to feed until harvest. From d 63 to 116, ADG and gain efficiency (g gain/kg …

The Effects Of Different Roughage Sources On Growth Performance And Carcass Properties In Native Geese, Cavi̇t Arslan, Fatma İnal

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to determine the effects of different roughage sources (alfalfa meal, grass meal and sugar beet pulp) on growth performance and carcass properties in geese. During the research, 51 one-day-old native geese chicks were used. Chicks were fed jointly for the first two weeks. At the beginning of the third week, the geese were divided into three groups. During weeks 3-10 different roughage (alfalfa meal, grass meal and sugar beet pulp) and concentrates were offered in separate feeders. During the third week concentrate was offered a 100 g/day/bird and increased 50 g a week until the …

Production Characteristics Of Chios X Akkaraman F1 And B1 Crossbred Lambs. Ii. Fattening Performance, Slaughter And Carcass Characteristics, Fi̇kret Esen, Orhan Özbey

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the fattening performance, and slaughter and carcass characteristics of Chios x Akkaraman F_1 and B_1 crossbred lambs. The data for the fattening study were obtained from 8 F_1 and 10 B_1 crossbred lambs. Five male lambs from each genotype were slaughtered to determine the slaughter and carcass characteristics. Lambs were fed with alfalfa hay and concentrates ad libitum in the fattening period. During the fattening period, the average daily live weight gains in crossbred F_1 and B_1 groups were 238.04 g and 232.07 g, and the amount of consumed concentrate feeds for 1 …

Fattening Performance And Carcass Characteristics Of Akkaraman Crosses (F1 And B1) With German Blackheaded Mutton And Hampshire Down Male Lambs, Ali̇ Akmaz, Emi̇n Teki̇n, Cafer Tepeli̇, Ramazan Kadak

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the fattening and carcass characteristics of German Blackheaded Mutton (GBM) x Akkaraman (A) F1, GBM x (GBM x A) B1, Hampshire Down (HD) x A F1 and HD x (HD x A) B1 male lambs. Ten GBM x A (F1), 4 GBM x (GBM x A) B1, 10 (HD) x A (F1) and 4 HD x (HD x A) B1 male lambs were used for fattening traits, and six of each breed from F1 genotypes, four of each breed from B1 genotypes for carcass traits. The lambs were fed, from the beginning at …

Fattening Performance And Carcass Characteristics Of Awassi Crosses (F1 And B1) With German Blackheaded Mutton And Hampshire Down Male Lambs, Ali̇ Akmaz, Emi̇n Teki̇n, Ramazan Kadak, Mehmet Gürkan

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to investigate the fattening and carcass characteristics of German Blackheaded Mutton (GBM) x Awassi (A) F1, Hampshire Down (HD) x A (F1) and HD x (HD x A) B1 male lambs. Nine GBM x A (F1), eight (HD) x A (F1) and eight HD x (HD x A) B1 male lambs were used for fattening traits, and six of each breed for carcass traits. The lambs were fed, from the beginning at approximately 20 kg of live weights to the finish at 45 kg, alfalfa hay 100 g/head/day and concentrates ad libitum. For statistical analysis, …

Fattening Performance And Carcass Characteristics Of Turkish Merino And Its Crosses (F_1 And B_1) With Hampshire Down And Germen Blackheaded Mutton Male Lambs, Ali̇ Akmaz, M. Emi̇n Teki̇n, Ramazan Kadak, Hali̇l Akçapinar

Turkish Journal of Veterinary & Animal Sciences

This study was carried out of to investigate the fattening and carcass characteristics of Türkish Merino (M), Hampshire Down (HD) x M F_1 , HD x (HD x M) B_1, German Blackheaded Mutton (GBM) x M F_1 and GBM x (GBM x M) B_1 male lambs. In this study, 10 M, 10 HD x M (F_1), 7 HD x (HD x M) B_1, 10 GBM x M (F_1) and 8 GBM x (GBM x M) B_1 male lambs were used for fattening traits, and 6 of each breed for carcass traits. The lambs were fed, from the beginning at aproximately …

G98-1373 Escherichica Coli Testing For Process Control Verification — Pork Carcass Sampling, Mindy Brashears, Dianne Peters

University of Nebraska-Lincoln Extension: Historical Materials

In July 1996, the USDA published the Final Rule on Pathogen Reduction for meat and poultry processing facilities. Its goal is to reduce the occurrence of food-borne pathogens in meat and poultry products. The rule requires carcass sampling for "generic" E. coli in meat and poultry slaughter operations. The USDA has developed guidelines for acceptable, marginal and unacceptable amounts of E. coli to be used by the processor to determine if their process is controlling microbial hazards. If E. coli testing indicates that the process is not in control of the microbial hazards, then the processors may have to make …

G98-1353 Fed Cattle Pricing, Dillon M. Feuz, Ted C. Schroeder, Clement E. Ward

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses pricing alternatives for fed cattle, including live weight, dressed weight and grid pricing. Pricing fed cattle is becoming more complex, requiring more time to evaluate pricing alternatives and marketing cattle. Is there one best pricing method? How are live weight, dressed weight, and grid or formula prices related? This NebGuide will provide answers to these and other questions about fed cattle pricing.

Body And Nutritional Composition Of Tilapia (Tilapia Ssp.) From The Southern Seyhan River, Suat Di̇kel, Mehmet Çeli̇k

Turkish Journal of Veterinary & Animal Sciences

Nutritional composition and edible part of carcass of tilapia caught from the Southern Seyhan River were investigated in this study. The results showed that edible part of carcass of male and female tilapia were 52.8±1.34% and 51.4±0.57%, respec-tively. Dry matter of carcass was 21.8±0.08% whereas water content was 78.2±0.08%. Crude protein, crude fat and crude ash were2.66±0.75%, 12.16±0.74% and 5.18±0.02%, respectively.

Genetic And Phenotypic (Co)Variances For Growth And Carcass Traits Of Purebred And Composite Populations Of Beef Cattle, K. E. Gregory, L. V. Cundiff, R. M. Koch

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Least squares means, genetic (σ_g), and phenotypic (σ_p) standard deviations, and phenotypic coefficients of variation (CV) were estimated on an age-constant basis for growth, carcass, and meat traits of castrate males from 12 breed groups combined, for 9 purebreds combined, and for the F3 generation of three composite populations combined to which the nine purebreds contributed. Also, heritabilities ( h²) and genetic ( r_g) and phenotypic ( r_p) correlations were estimated among growth, carcass, and meat traits for all breed groups combined involving 1,594 individuals that were the progeny of …

Breed-Type And Mating System Effects On Beef Cattle Carcass Characteristics, D. M. Marshall

South Dakota Beef Report, 1994

The effects of dam breed-type (Simmental x Hereford, Angus x Hereford, and Tarentaise x Hereford) and mating system (rotational versus rota-terminal) on carcass characteristics were evaluated. Means for dam breed-type and mating system were adjusted in separate analyses to one of three slaughter endpoints: 437-day slaughter age, 734-lb carcass weight, or .49 inches of carcass fat thickness. Calves from Simmental x Hereford dams had heavier carcasses compared to the other two dam breed-types when adjusted to a constant slaughter age or fat thickness. Calves from Angus x Hereford dams tended to have more external fat, smaller rib eye area, and …

Rp94-529 Porcine Somatotropin (Pst), Palmer J. Holden

University of Nebraska-Lincoln Extension: Historical Materials

What is porcine somatotropin (pST)?

Porcine somatotropin, abbreviated as pST, is a growth hormone naturally produced in pigs. The word "porcine" refers to pigs, and the word "somatotropin" means body growth and refers to the name of the hormones.

This research publication discusses what porcine somatotropin is, how scientists developed pST, how the protein nature affects its use, what research shows, is pST safe and will consumers accept it, and what is pST's future.

Feedlot Performance And Carcass Traits Of Cull Cows Fed For Slaughter, R. H. Pritchard, P. T. Burg

South Dakota Beef Report, 1993

This trial was designed to evaluate how various factors impact the value added process of feeding cull cows. Specific management criteria evaluated included initial body condition, days on feed, implants, and cow age. Feedlot performance and carcass trait changes due to these factors were compared. Prolonging the feeding period from 50 to 77 or 105 days tended (P=.10) to increase average daily gain and dry matter intake (P<.01) and had no (P>.15) effect on feed/gain. This response is similar to short term adaptation and feeding of young cattle. Added days on feed increased (P<.001) dressing percentage, ribeye area, and ribfat thickness while decreasing (P<.001) lean age. Days on feed did not improve fat color. Older cows gained slower (P<.001) and were lighter muscled than young cows. Longer feeding periods progressively increased the number of high quality carcasses produced.

Genetic Parameters For Carcass Traits In Beef Cattle, D. M. Marshall

South Dakota Beef Report, 1993

The recent scientific literature was reviewed to summarize genetic parameters for carcass traits in beef cattle. Heritability estimates were generally moderate to large, in agreement with previous literature estimates. This suggests good potential for making change through genetic selection for a given individual carcass characteristic. However, genetic improvement through multiple-trait selection would be slowed by several important genetic antagonisms between traits, suggesting the use of terminal breeding systems with complementary sire and dam genetic types. Individual and maternal heterosis estimates from age-constant analyses were numerically positive and quite large for fat thickness and tended to be numerically positive and small …

An Overview Of The Role Of Fat In Nutrition And Formulation And Its Measurement In The Live Animal, Meat Carcass And Processed Meat Products, Paul B. Newman

Food Structure

The role of fat in nutrition and health is complex but one about which consumers have only recently become aware. As a consequence of changing consumer attitudes and because fat affects many physical attributes in food, raw material suppliers and food manufacturers have attempted to improve the range and nutritional composition of available foodstuffs. However, with a substantial price difference between fat and lean, and ever-increasing demands for improved throughputs and operational cost performance, producer and manufacturing sectors require rapid, accurate methods of fat measurement suitable for commercial application. These are only just beginning to become available but should ultimately …

Implant Strategies For Yearling Steers, R. H. Pritchard, M. A. Robbins

South Dakota Beef Report, 1991

Various implant strategies were compared in heavy yearling steers fed for 98 days. Implant treatments included control (nonimplanted), 722 (72 mg zeranol), 36TBA (36 mg zeranol plus 140 mg trenbolone acetate [TBA]), 72TBA (72 mg zeranol plus TBA) and ETBA (20 mg estradiol-200 mg progesterone plus TBA). The 72-mg zeranol dosage represents two implants in one site. Combinations of implants were administered, one in each ear. Implanting increased (P<.05) ADG and DM1 and decreased (P<.05) feed/gain values. Among implanted steers, no differences (P>.10) in ADG or DM1 were observed. Feed/gain was lower (P< .05) for zeranol-TBA combinations than the 72-mg zeranol treatment. Carcasses were heavier and rib eye area was greater (P<.05) in the 72TBA than 36TBA treatment. Kidney-pelvic-heart fat was lower (P<.05) when the ETBA combination was used.

Effects Of Restricting Intake On Carcass Traits Of Young Steers, R. H. Pritchard, D. H. Gee, M. R. Robbins

South Dakota Beef Report, 1989

Feedlot performance and carcass characteristics were compared when steer calves were fed energy dense diets ad libitum (AL) or restricted (RI) to achieve constant growth rates. AL steers grew more rapidly (P.e.10) than RI steers, 2.93 vs 2.74 Ib per head per day. For the period from 98 days to slaughter (AL = 89 days, RI = 99 days), AL steers consumed more dry matter daily than Rl steers. Restricting intake did not affect feed conversions or total dry matter consumed while in the feedlot. Steers were slaughtered at similar final weights. Intake level did not affect carcass weight, rib …