Browsing by Subject "Beef cattle -- Carcasses"
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Item Characteristics of feeder cattle as predictors of performance and carcass traits(Texas Tech University, 1979-08) Schlegel, Ronald GeneNot availableItem Effect of breed type and grazing performance on feedlot and carcass traits in cattle(Texas Tech University, 2002-08) Cleere, Jason JamesNot availableItem Effect of degree of muscling of feeder cattle upon subsequent feedlot performance and carcass characteristics(Texas Tech University, 1981-12) Weatherbee, Melinda ElaineNot availableItem Effects of chromium on performance and growth of feedlot steers(Texas Tech University, 2000-05) Pollard, Gregory V.Not availableItem Effects of repeated urea dilution measurement of feedlot performance and consistency of estimated body composition in steers of different breed types(Texas Tech University, 1996-08) Wells, Robert SNot availableItem Effects of Sel-Plex (organic selenium) and vitamin E on performance, immune response, and beef cut shelf life of feedlot steers(Texas Tech University, 2002-08) Clyburn, Bradley ScottSeveral experiments were designed to evaluate the differences of vitamin E level and selenium source on animal performance, selenium plasma concentrations, carcass characteristics, beef retail display, sensory characteristics, colostrum and milk components, and immunity in ruminants. Steers receiving Se yeast responded with an improvement in performance during the first 56 d, however, neither Se source nor vitamin E level affected performance over the entire 103 d experiment. Carcass quality measurements were similar among all treatments, however cattle supplemented with inorganic selenium and a moderate level of vitamin E responded with an increased loin-eye area. Lean muscle lightness of steaks aged 7, 14, and 35 d was improved with 50% less vitamin E when Se yeast was added to the diet. Steaks from steers fed no supplemental dietary Se or vitamin E, for all aging treatments, showed no difference in lean muscle lightness difference from the organic Se treatments with 125 lU and 500 lU of vitamin E nor the inorganic Se treatments at 35 d of aging. Neither selenium source nor vitamin E level influenced Warner Bratzler shear values. Selenium enriched yeast resulted in a greater Se colostrum concentration compared to inorganic Se and the control treatments, however, no differences were observed in milk Se concentration among treatments. Selenium yeast resulted in a greater colostrum Se concentration compared to inorganic Se and the control treatments, however, no differences were observed in milk Se concentration among treatments. Selenium source did not affect milk fat percentage between treatments. However, ewes supplemented with dietary inorganic Se showed a reduced colostrum (0 h) protein percentage compared to the control and the Se yeast treatments. Selenium source did not significantly affect milk lactose percentage among treatments. Additionally, non-fat solids percentage was reduced for all treatments after 6 h of lactation. Selenium source or supplementation had no affect on somatic cell count between treatments. Neither Se source nor supplementation affected ewe or lamb plasma Se or immunogloblin levels.Item Effects of the proportion of supplemental dietary crude protein supplied by urea on performance and carcass characteristics of finishing beef cattle fed steam-flaked corn-based diets with Sweet Bran® wet corn gluten feed(Texas Tech University, 2004-05) Richeson, John TAn experiment was conducted to examine the effects of urea level in steam-flaked corn-based diets containing 25%) (DM basis) Sweet Bran® wet corn gluten feed (WCGF) on performance and carcass characteristics of beef steers. British x Continental steers were blocked by BW (average initial BW = 402.76 kg ± 10.75; n = 240) and assigned to one of three dietary treatments, which consisted of three different ratios (N basis) of urea:cottonseed meal provided in the supplemental CP: (1) 33%)urea:67%) cottonseed meal (33%); (2) 67%) urea:33% cottonseed meal (67%); and (3) 100%) urea:0%) cottonseed meal (100%). Eight pens per treatment were arranged in a randomized complete block design. Performance and carcass data were analyzed using mixed model procedures of S AS (SAS Institute, Cary, NC), with pen designated as the experimental unit and block as the random effect. There was a quadratic (P = 0.06) effect of the proportion of urea in supplemental CP on ADG from d 0 to 56, as steers fed the 33% diet gained less than cattle fed either the 67 or 100%) treatment. From d 0 to 112, ADG increased linearly (P = 0.09) with increasing proportion of urea provided in the supplement. For the overall feeding period, but especially early in the feeding period, ADG was numerically greatest in the steers fed the diet with 67%) urea:33%) cottonseed meal. Average daily DM intake (DMI) was affected linearly (P = 0.001), by urea level, as cattle fed the 33%) treatment consumed less than those fed the 67 or 100%> treatments from d 0 to 28. For the entire feeding period, DMI tended (P = 0.14) to increase linearly with increasing proportion of urea. There was a quadratic effect on gain:feed ratio from d 0 to end; steers fed the diet containing 67% urea:33%. cottonseed meal gained more efficiently (P = 0.09) than those fed the 33%) diet, whereas gain:feed by steers fed the 100%) treatment did not differ from that of steers in the other two treatments. Furthermore, there was a tendency for a quadratic effect (P = 0.14) of urea level relative to hot carcass weight (HCW). Average HCW was 393.0 kg for the 67% treatment, whereas the 33%) treatment averaged 384.3 kg, with an intermediate value of 390.5 kg for the 100%) treatment. Percentage of internal fat was least (P = 0.10, linear effect of urea level) for the 33%) diet. There were no treatment effects for yield grade, dressing percent, percentage of cattle grading USD A Choice, marbling score, backfat thickness, or longissimus muscle area. Incidence of liver abscess did not differ (P = 0.30) among the three treatments; however, the 33% treatment had a numerically higher rate (12.25%) than the 67% (8.26%)) and the 100% (7.50%) treatments. Results indicate that when feeding a finishing diet based on steam-flaked corn that contains 25%o (DM basis) Sweet Bran® WCGF, providing supplemental CP with a ratio of at least 67%) urea:33%o cottonseed meal improves ADG and feed efficiency compared with 33%) urea:67%> cottonseed meal.Item Factors associated with the variation in beef tenderness(Texas Tech University, 1985-12) Hawkins, Richard RodeheaverNot availableItem Fragmentation index as an early postmortem predictor of beef tenderness(Texas Tech University, 1983-12) Cable, James KennethNot availableItem Histological and histochemical variation of striated muscle from beef cattle which are homozygous, heterozygous and free of the gene for muscular hypertrophy(Texas Tech University, 1981-12) Fuller, Laura AnneNot availableItem Performance and carcass characteristics of finishing beef steers fed high-oil corn or normal corn plus added fat(Texas Tech University, 1999-12) Derington, Hart MichaelOne hundred twenty Angus steers with an initial body weight (BW) of 288 kg were fed for 165 d to evaluate the effects of a steam-flaked high-oil corn-based diet (HOC) vs a steam-flaked normal corn plus added fat-based (CON) diet. The two diets were balanced to be isocaloric and isonitrogenous. Steers were assigned randomly by weight to one of the two treatments and housed five per pen, with 12 pens per treatment. Steers were fed once daily and weighed every 28 d throughout the study. Performance records including average daily gain (ADG), dry matter intake (DMI), and feed:gain ratio were recorded for each 28-d period. Following the 165-d feeding period, the steers were shipped to a commercial slaughter facility where carcass data were collected and recorded. Initial BW did not differ between treatments, whereas final BW tended (P < .08) to be greater for steers fed the CON diet. Steers fed CON had increased ADG during d 0 to 28 (P< .03), d 0 to 84 (P < .02), and for the overall 165-d feeding period (P < .04). Daily DMI did not differ (P > . 10) between treatments for any of the cumulative periods; however, steers fed HOC averaged approximately .23 kg/d more DMI for the entire 165-d feeding period. Feed:gain ratio was superior for steers fed CON for each of the cumulative periods (P < .01 to P < .03). Moreover, for the 165-d feeding period feed:gain ratio was improved 7.5% (P < .01) for steers fed CON. Hot carcass weight, dressing percent, fat thickness, kidney, pelvic, and heart fat (KPH), and yield grade did not differ between treatments. Steers fed HOC tended (P < .07) to have a smaller longissimus muscle area as well as a lower (7.4% decrease; P < .01) marbling score than steers fed CON. Percentage of carcasses grading USDA Choice did not differ between treatments. These data contradict previous experiments with HOC, which showed improvements in performance and carcass characteristics with HOC diets; however, previous experiments involved shorter feeding periods than in the present study.Item The effect of frame size on feeder cattle performance and subsequent carcass characteristics(Texas Tech University, 1986-05) Gwayumba, Washington EseseNot availableItem Visual scores of feeder cattle as predictors of subsequent performances and carcass traits(Texas Tech University, 1980-05) Hembree, Thomas RogerNot available