scholarly journals Effects of reducing growth rate via diet dilution on bone mineralization, performance and carcass yield of coccidia-infected broilers

2019 ◽  
Vol 98 (11) ◽  
pp. 5477-5487 ◽  
Author(s):  
Idiegberanoise Oikeh ◽  
Panagiotis Sakkas ◽  
James Taylor ◽  
Ilias Giannenas ◽  
Damer P Blake ◽  
...  
Keyword(s):  
Growth Rate ◽  
Bone Mineralization ◽  
Carcass Yield ◽  
Diet Dilution

LIVE PERFORMANCE AND CARCASS CHARACTERISTICS OF BEEF BULLS IN RELATION TO SELECTION FOR YEARLING WEIGHT

1970 ◽  
Vol 50 (3) ◽  
pp. 491-497 ◽  
Author(s):  
A. H. MARTIN ◽  
H. T. FREDEEN ◽  
J. A. NEWMAN
Keyword(s):  
Growth Rate ◽  
Live Weight ◽  
Direct Selection ◽  
Control Line ◽  
Live Performance ◽  
Carcass Yield ◽  
Yield And Quality ◽  
Lean Growth ◽  
Kidney Fat ◽  
Selection For

Data over two years on a total of 149 Shorthorn bulls from a closed herd under direct selection for yearling weight were used to examine line differences in carcass yield and quality and to evaluate relationships between live performance and carcass yield and quality. No significant differences [Formula: see text] in performance or carcass data between control and selected lines were apparent in 1967. However, in 1968 bulls from the selected line were heavier at slaughter (470.5 kg vs. 441.8 kg), their carcasses contained more kidney fat (9.14 kg vs. 8.46 kg), and they had larger loin eye area but smaller weight-adjusted loin eye area. Rate of gain was superior for the selected line whether examined as live-weight, carcass weight, trimmed primal cut weight or lean weight per day of age. There were no significant differences between lines for percent fat, lean or bone in primal cuts, or for rib fat thickness, percent trimmed prime cuts, percent seam fat, muscle/bone and hind/front ratios, or for chemical composition or tenderness evaluations of the longissimus dorsi. Averaged over the two years and at the same averaged slaughter weights (418 days), selected-line bulls produced a significantly greater quantity of total carcass, of trimmed primal cuts and of total lean than did the control-line bulls; selection for yearling weight appeared to have been effective in increasing rate of lean growth. Phenotypic correlations indicated that liveweight/day of age was more highly related to variation in lean growth rate than growth rate of fat. From 20 to 60% of the variation in wholesale cut weights was associated with differences in rate of gain. Distribution of the gains was little influenced by rate of gain. Tenderness evaluations were not related to live performance.

Evaluation of specific populations of commercial pigs produced in Québec for feed performance, carcass yield and lean meat colour

1995 ◽  
Vol 75 (4) ◽  
pp. 517-524 ◽  
Author(s):  
K. L. Hammell ◽  
J. P. Laforest ◽  
J. J. Dufour
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Carcass Composition ◽  
The Body ◽  
Feed Consumption ◽  
Feed Conversion ◽  
Carcass Yield ◽  
Lean Meat ◽  
Key Words Pig ◽  
Meat Colour

Data from approximately 850 commercial pigs tested in 12 trials, from 1987 to 1990 at the Beaumont test station in Québec were used to determine the effect of growth rate and body composition on growth performance, carcass yield and lean meat colour. Pigs were housed four to a pen and were fed commercial diets. Feed intake and growth rate were measured during the test, and carcass measurements were taken at slaughter and at 24 or 72 h following slaughter. The different groups of pigs were defined according to a 2 × 2 factorial, with one factor being the growth rate [fast growth (FG) or slow growth (SG)] and the second factor being the body composition of the carcass [fat (F) or lean (L)]. The FG commercial pigs reach market weight at a younger age with lower overall feed consumption and generally a better feed conversion than SG pigs. Furthermore, FG pigs have more backfat, longer carcasses and a slightly darker meat. The L commercial pigs had similar growth performances with a better lean meat yield than the F commercial pigs. Growth variables and composition of the carcass had little effect on the meat characteristics measured. The proportion of barrows compared to gilts was higher in the FG and F groups than in the SG and L groups, which could account for some of the differences observed between groups. However, the rate of growth and the type of body composition affected the growth and feed consumption performances as well as the carcass yield in a similar way for both sexes. Overall, less than 3% and less than 2% of the pigs produced meat with a colour standard of 1 (extremely pale) or 5 (extremely dark), respectively. The SG-L group had a slightly higher proportion of pigs with a pale meat colour compared to the other groups. Key words: Pig, backfat, growth rate, carcass composition, meat colour

NUTRIENT INTAKE, GROWTH PERFORMANCE AND CARCASS YIELD OF WEANER RABBITS FED GRADED LEVELS OF DRIED CITRUS (C. sinensis) PULP

2016 ◽  
Vol 15 (1) ◽  
pp. 60-68
Author(s):  
O. O ONI ◽  
O. M.O, IDOWU ◽  
J. A. OLANITE ◽  
A. M. BAMGBOSE
Keyword(s):  
Growth Rate ◽  
Weight Gain ◽  
Nutrient Intake ◽  
Control Diet ◽  
Average Weight ◽  
Feed Conversion ◽  
Carcass Yield ◽  
Treatment Groups ◽  
Total Weight Gain ◽  
Dietary Treatments

A study was conducted to investigate the response of weaner rabbits to graded dietary replacement of wheat offal with dried citrus pulp (DCP) at 0, 10, 20 and 30% (weight/weight) respectively .A total of Sixty-four, male and female weaner rabbits of 56 days old, were randomly assigned to four dietary treatments with sixteen rabbits each and consisting of four rabbits per replicate in a completely ran- domized design. The study lasted for 112 days during which data was obtained on nutrient intake, performance characteristics and carcass yield. The crude protein intake of the rabbits decreased (P<0.05) significantly as the DCP inclusion in the diets increased. There were significant (P<0.01) differences in the values obtained for the final weight, total weight gain, average weight gain, meta- bolic weight gain and growth rate across the treatment groups. The growth rate was 10.29 g/d in the control fed rabbits but further decreased with increasing level of DCP in the diets with values of 11.29, 6.30 and 5.80g/d obtained respectively for rabbit fed with 10%, 20%, and 30% DCP inclusion level. The lowest feed conversion ratio was obtained at the 0% level of DCP inclusion. The retail cut parts indicated a significant (P<0.05) difference in the values for rack and ranged from 11.92 to 18.06g. It was concluded that although, rabbits fed with control diet had the highest overall performance, 10% dietary inclusion of DCP supported improved growth and better carcass yield.

Body composition of British and zebu × British cattle in northern Australia 1. Breed and growth rate effects on yield of carcass, dressed carcass composition and offal composition

1984 ◽  
Vol 39 (2) ◽  
pp. 177-193 ◽  
Author(s):  
R. M. Seebeck
Keyword(s):  
Growth Rate ◽  
Body Composition ◽  
Body Weight ◽  
Abdominal Fat ◽  
Lower Proportion ◽  
Carcass Composition ◽  
The Body ◽  
Carcass Yield ◽  
Rate Of Growth ◽  
Rate Effects

ABSTRACTComparative slaughter was used to assess the body composition of Shorthorn-Hereford (SH), Africander cross (A×), Brahman cross (B×), and late castrated Brahman cross (B×(late)) steers of the F, generation with respect to their yield of carcass, gross carcass composition and offal composition. Animals were slaughtered at pre-determined weights of 315, 355, 399, 449 and 505 kg.The B× animals had the highest carcass yield (expressed either as dressed carcass weight at the same fasted body weight or at the same empty body weight), while the A×, B×(late) and SH animals had similar carcass yield. Within a breed, rate of growth affected carcass yield, with faster growing animals having the lower carcass yield, particularly with respect to fasted body weight.The breeds were different in carcass composition but this was dependent on both size and growth rate. Brahman cross animals had a lower proportion of bone than A× and SH animals, particularly at the higher body weights. Faster growing animals tended to contain more muscle and bone and less fat, with the exception of the SH animals.The breeds were also significantly different in the composition of the offal components. A× were notable for high head weights and low tail weights, B× having high blood weights and low total gut tissue weights, and Bx(late) having high hide weights and low abdominal fat weights.Rate of growth had some effect on offal composition, the general trend being that the faster growing animals were characterized by a lower proportion of heart, blood and pancreas. However there was also evidence that the rate of growth differentially affected the offal composition with respect to breeds. This effect mainly arose because the faster growing B×(late) animals had lower weights of abdominal fat. Within the other breeds, the opposite trend was observed.

Effect of dietary supplements based on urea or whitefish meal on growth and fleece characteristics of siberian and australasian Crossbred cashmere goats

1994 ◽  
Vol 1994 ◽  
pp. 215-215
Author(s):  
H. Galbraith ◽  
Md. Shahjalal ◽  
J.H. Topps
Keyword(s):  
Growth Rate ◽  
Growth Performance ◽  
Dietary Supplements ◽  
Protein Supplementation ◽  
Carcass Yield ◽  
Animal Agriculture ◽  
Cashmere Goats ◽  
Angora Goats ◽  
The Uk ◽  
Fibre Characteristics

The growing need to diversify animal agriculture in the UK has increased interest in the production of fibre and meat from goats. Previous studies (e.g. Shahjalal, Galbraith & Topps 1992, Anim. Prod. 541, 405–412; Deaville & Galbraith 1992, Anim. Fd. Sci. Technol. 38, 127–133) have suggested that protein supplementation can influence growth rate and fibre characteristics of Angora goats. The aim of the work reported here was to provide more detailed infirmation on the effect of level of protein supplementation on growth performance, carcass yield and fibre characteristics of British crossbred Cashmere goats.

The threshold energy for atom displacement in fcc metals

1990 ◽  
Vol 48 (4) ◽  
pp. 530-531
Author(s):  
Wilfried Sigle ◽  
Matthias Hohenstein ◽  
Alfred Seeger
Keyword(s):  
Growth Rate ◽  
Elevated Temperatures ◽  
Threshold Energy ◽  
Dislocation Loops ◽  
Absolute Minimum ◽  
Voltage Electron ◽  
Atom Displacement ◽  
Electron Microscopes ◽  
Fcc Metal

Prolonged electron irradiation of metals at elevated temperatures usually leads to the formation of large interstitial-type dislocation loops. The growth rate of the loops is proportional to the total cross-section for atom displacement,which is implicitly connected with the threshold energy for atom displacement, Ed . Thus, by measuring the growth rate as a function of the electron energy and the orientation of the specimen with respect to the electron beam, the anisotropy of Ed can be determined rather precisely. We have performed such experiments in situ in high-voltage electron microscopes on Ag and Au at 473K as a function of the orientation and on Au as a function of temperature at several fixed orientations.Whereas in Ag minima of Ed are found close to <100>,<110>, and <210> (13-18eV), (Fig.1) atom displacement in Au requires least energy along <100>(15-19eV) (Fig.2). Au is thus the first fcc metal in which the absolute minimum of the threshold energy has been established not to lie in or close to the <110> direction.

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