scholarly journals Dressing percentage and meat yield of Hybro G+ provenance broilers

2021 ◽  
Vol 854 (1) ◽  
pp. 012052
Author(s):  
Slobodan Lilic ◽  
Jelena Babic Milijasevic ◽  
Tamara Geric
Keyword(s):  
Abdominal Fat ◽  
Ambient Conditions ◽  
Meat Yield ◽  
Average Percentage ◽  
Ad Libitum ◽  
Dressing Percentage

Abstract The goal of this paper was to examine the slaughter characteristics of meat from Hybro G+ provenance broilers. Characteristics studied were dressing percentage, breast, leg (thigh and drumstick) and abdominal fat in chilled carcass, and percentage of meat, bones and skin in breast and leg. In this trial, one-day broilers of Hybro G+ provenance were raised under the same zoohygienic and ambient conditions that met the technological requirements for this provenance and were provided with feed and water ad libitum. After 42 days’ fattening, broilers were slaughtered and the resultant carcasses were air chilled. The average dressing percentage was 73.15%, and in carcasses, the average percentage of breast was 34.33%, leg was 27.91% and abdominal fat was 1.13%. The percentage in breast and leg of meat was 72.61% and 70.38%, of skin was 8.00% and 9.45% and of bones was 19.79% and 19.59%, respectively. The meat:bone ratio was 0.27 for breast and 0.28 for leg.

Productivity of early-weaned lambs fed high-grain diets of wheat, oats or barley with or without lupin grain

1986 ◽  
Vol 26 (3) ◽  
pp. 279 ◽  
Author(s):  
PA Kenney
Keyword(s):  
Weight Gain ◽  
Daily Intake ◽  
Abdominal Fat ◽  
Barley Grain ◽  
Gain Ratio ◽  
Whole Wheat ◽  
Wool Growth ◽  
Ad Libitum ◽  
Dressing Percentage ◽  
Slight Rise

Poll Dorset x (Border Leicester x Merino) lambs were weaned at 6 weeks and fed ad libitum diets of whole wheat, oat or barley grain with 0, 15, 30, 45,60 or 75% lupin grain, or all lupin grain, for 11 weeks. All diets included 10% hay. The lambs adapted to diets containing barley and wheat more quickly than to diets containing oats. Digestibilities of grain DM with hay alone were: wheat 83%, oats 73%, barley 75%, and lupins 83%. Inclusion of lupins in wheat-based diets had no effect on digestibility or intake of feed or weight gain of lambs. Inclusion of lupins with oats increased digestibility ( P < 0.05) and intake of feed (P< 0.05) and caused a slight rise in feed intake:liveweight gain ratio, but greatly reduced feed intake:carcass gain ratio (P< 0.05). Inclusion of lupins with barley increased digestibility and intake of feed (P< 0.05), and caused a slight fall in the feed intake:liveweight gain ratio (P<0.05) and a large fall in the feed intake:carcass gain ratio (P<0.05). Responses to lupins were generally most pronounced as lupin content increased from 0 to 30%. Liveweight, carcass weight, wool growth, abdominal fat and muscle depth at rib 12 were all linearly related to intake of digestible DM (P<0.05). Dressing percentage increased up to a maximum as daily intake of digestible DM increased to 0.55 kg/sheep and then fell (P<0.05). Liveweight was greater, but dressing percentage less, for lambs fed oats than for those fed barley or wheat (P<0.05). Carcass weights of lambs fed different grains were therefore similar at the same intakes of digestible DM.

scholarly journals Inactivity induces increases in abdominal fat

2007 ◽  
Vol 102 (4) ◽  
pp. 1341-1347 ◽  
Author(s):  
Matthew J. Laye ◽  
John P. Thyfault ◽  
Craig S. Stump ◽  
Frank W. Booth
Keyword(s):  
Caloric Intake ◽  
Cell Number ◽  
Abdominal Fat ◽  
Cell Diameter ◽  
Fat Pad ◽  
Voluntary Running ◽  
Old Rats ◽  
Ad Libitum ◽  
Running Wheels ◽  
Omental Fat

Previously, inducing inactivity for 53 h after 21 days of voluntary running resulted in a 25 and 48% increase in epididymal and omental fat pad weights, respectively, while rats continued to eat more than a group that never had access to a running wheel ( J Physiol 565: 911–925, 2005). We wanted to test the hypothesis that inactivity, independent of excessive caloric intake, could induce an increase in fat pad mass. Twenty-one-day-old rats were given access to voluntary running wheels for 42–43 days so that they were running ∼9 km/day in the last week of running, after which wheels were locked for 5, 53, or 173 h (WL5, WL53, WL173) before the rats were killed. During the 53 and 173 h of inactivity, one group of animals was pair fed (PF) to match sedentary controls, whereas the other continued to eat ad libitum (AL). Epididymal and retroperitoneal fat masses were significantly increased in the WL173-PF vs. the WL5 group, whereas epididymal, perirenal, and retroperitoneal fat masses were all significantly increased in the WL173-AL group compared with the WL5 group. Additionally, hyperplasia, and not hypertrophy, of the epididymal fat mass was responsible for the increase at WL173-AL as demonstrated by a significant increase in cell number vs. WL5, with no change in cell diameter or volume. Thus two important findings have been elucidated: 1) increases in measured abdominal fat masses occur in both AL and PF groups at WL173, and 2) adipocyte expansion via hyperplasia occurred with an ad libitum diet following cessation of voluntary running.

Glucose transport with brief dietary restriction: heterogenous responses in muscles

1994 ◽  
Vol 266 (6) ◽  
pp. E946-E952 ◽  
Author(s):  
G. D. Cartee ◽  
D. J. Dean
Keyword(s):  
Glucose Transport ◽  
Dietary Restriction ◽  
Time Course ◽  
Abdominal Fat ◽  
Transport Activity ◽  
Fischer 344 ◽  
Flexor Digitorum Brevis ◽  
Ad Libitum ◽  
Ad Libitum Intake ◽  
Flexor Digitorum

The time course (1, 5, or 20 days) for the effect of dietary restriction (DR; approximately 25% reduction below ad libitum intake) on epitrochlearis and flexor digitorum brevis (FDB) muscle glucose transport activity was studied in female Fischer 344 rats (8 mo old). Epitrochlearis glucose transport activity with 100 microU/ml insulin was increased by 38% after 5 days of DR (P < 0.05) despite no change in glucose transport activity with 0 or 20,000 microU/ml insulin. The increase with 100 microU/ml insulin was not further enhanced by 20 days of DR. DR did not result in a significant increase in the glucose transport activity of the FDB with 0, 100, or 20,000 microU/ml insulin. Abdominal fat content was significantly (P < 0.01) reduced below ad libitum levels only after 20 days of DR. These results demonstrate that DR-induced improvement in epitrochlearis glucose transport activity with a physiological insulin concentration can occur very rapidly, preceding detectable changes in basal or maximal insulin-stimulated glucose transport activity or abdominal fat pad mass, and the enhancement of insulin action does not occur simultaneously in all muscles.

Exogenous growth hormone releasing factors and cottonseed meal improve growth performance and composition of gain in lambs fed lucerne chaff ad libitum

1994 ◽  
Vol 45 (6) ◽  
pp. 1111 ◽  
Author(s):  
RD Sainz ◽  
BJ Hosking ◽  
FJ Hart ◽  
BR Schricker
Keyword(s):  
Growth Hormone ◽  
Growth Performance ◽  
Cottonseed Meal ◽  
Conversion Efficiency ◽  
Meat Tenderness ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Reduced Fat ◽  
Ad Libitum ◽  
Dressing Percentage

Forty-eight crossbred wether lambs (38 kg) were randomly assigned to two dietary groups (LUC, chaffed lucerne ad libitum; CSM, LUC plus 300 g cottonseed meal/lday) and two hormone treatment groups (rGRF, recombinant growth hormone-releasing factor (GRF); sGRF, synthetic GRF) plus controls (CON, excipient only), and slaughtered after treatment for 28 (n = 36) or 30 (n = 12) days. An initial slaughter group (n = 12) was killed on day 0. CSM reduced intake of lucerne chaff, but increased total feed intake. CSM also increased liveweight gain and wool growth, with no effect on feed conversion efficiency. CSM increased carcass weight and decreased subcutaneous fat depth, with no effect on dressing percentage or longissimus dorsi (LD) area. Meat tenderness tended to decrease with CSM supplementation. CSM increased carcass protein accretion ( P < 0.01), with no significant change in fat gain or final composition (P > 0.05). CSM increased weights of the pelt, liver and empty body, and decreased the proportion of digesta in liveweight. Weights of blood, forestomachs and small intestine tended to increase as well (P < 0.10). Both sources of GRF had similar effects. Intakes were not significantly affected by GRF, but feed conversion efficiency improved (P < 0.01) with GRF treatment (6.4 v. 9.2 feed:gain for GRF and CON respectively). Liveweight gains and final weights of the whole body and carcass were increased additively by CSM and GRF. GRF reduced fat depth and increased LD area, with no effect on dressing percentage, carcass length or meat tenderness. These changes reflected increased carcass protein and reduced fat contents, brought about by increased accretion of protein and water and reduced fat gain due to GRF. GRF increased weights of blood and liver beyond the general increase in body size. Cottonseed meal and GRF additively produced significant improvements in growth performance and carcass quality of young wether lambs fed a roughage diet. GRF may be a useful tool to improve livestock production under extensive and intensive conditions.

Fattening steers on hay and oats

1973 ◽  
Vol 13 (64) ◽  
pp. 487 ◽  
Author(s):  
LR Corah ◽  
IE Saxton ◽  
AH Bishop ◽  
SA Jackson
Keyword(s):  
Daily Intake ◽  
Late Summer ◽  
Seasonal Distribution ◽  
Economic Implications ◽  
Market Requirements ◽  
Fat Thickness ◽  
The Mean ◽  
Ad Libitum ◽  
Dressing Percentage

Hereford steers aged 18 to 20 months were confined in feedlots and given rations of baled pasture hay and whole oat grain during late summer in two successive years. Mid-season hay ad libitum plus 1.4, 2.7, or 4.1 kg of oats a day were used in experiment 1 and early hay with 1.4, 2.7, or 4.1 kg of oats and mid-season hay with 2.7, 4.1, or 5.4 kg of oats in experiment 2. Steers were slaughtered when they had reached liveweights of approximately 370 kg in the first experiment or 41 6 kg in the second experiment. As the level of oats in the ration increased, the liveweight gain of the steers increased. Those receiving the highest oat rations gaining at 0.8 to 1.1 kg per day. The addition of grain to the diet reduced the time to slaughter, lowered the daily intake of hay, and reduced the quantity of fodder required per unit of liveweight gain. The mean conversion ratios declined by 1.8 units for each additional ten per cent of oats in the ration. The higher levels of grain tended to increase dressing percentage, fat thickness and the quantity of fat in the carcase. The results are discussed in relation to market requirements, availability and relative costs of ration components and the economic implications of fattening in late summer on the price and seasonal distribution on the production of meat. It is concluded that the system would have application in southern Australia for properties raising steers on pasture.

Growth and carcass characteristics of ram, cryptorchid and wether Border Leicester x Merino lambs: effects of increasing carcass weight.

1986 ◽  
Vol 26 (2) ◽  
pp. 153 ◽  
Author(s):  
GJ Lee
Keyword(s):  
Growth Rate ◽  
Carcass Characteristics ◽  
The Other ◽  
Carcass Weight ◽  
Consumer Acceptability ◽  
Cross Border ◽  
Ad Libitum ◽  
Dressing Percentage ◽  
Fat Score ◽  
Score Distributions

The growth and carcass characteristics of first-cross Border Leicester x Merino ram, cryptorchid and wether lambs were compared over a range of slaughter weights (35-55 kg). Lambs were offered feed ad libitum after weaning. The growth rate of wether lambs (221 g/day) was less (P< 0.01) than that of rams and cryptorchids (308 and 280 g/day respectively, P = 0.076). The dressed carcasses of the wether lambs were approximately 2 percentage units heavier than those of the ram and cryptorchids, but this difference was partly due to the weight of the testes. Across all sex groups, dressing percentage increased by 0.46 percentage units per kg increase in carcass weight. The carcasses of rams and cryptorchid lambs tended to be leaner than those of wethers. Fat score distributions, based on export standards, were such that wethers scored higher (fatter) than rams and cryptorchids (P< 0.05). There was a significant sexx carcass weight interaction with GR tissue depths. Above 17 kg carcass weight, tissue depth of wether lambs was greater than those of the other sex types. Of 12 families assessing consumer acceptability (taste, smell, size, fatness and tenderness) of leg roasts, the majority showed no preference for any of the sexes.

scholarly journals Effects of L-carnitine supplementation of diets differing in energy levels on performance, abdominal fat content, and yield and composition of edible meat of broilers

1998 ◽  
Vol 80 (4) ◽  
pp. 391-400 ◽  
Author(s):  
Mahmoud H. Rabie ◽  
Mihály Szilágyi
Keyword(s):  
Significant Interaction ◽  
Body Weight Gain ◽  
Energy Levels ◽  
Abdominal Fat ◽  
Metabolizable Energy ◽  
Dietary Energy ◽  
Carnitine Supplementation ◽  
Feed Conversion ◽  
Ad Libitum ◽  
Different Levels

Responses to supplemental dietaryl-carnitine of broilers fed on diets with different levels of metabolizable energy (ME) were investigated using growth performance and some carcass measurements. Three isonitrogenous diets containing 13.5, 12.8 or 12.2 MJ ME/kg were formulated, with or without supplementall-carnitine (50mg/kg) and fedad libitumfrom 18 to 53 d of age. Supplementall-carnitine increased body-weight gain (BWG) and improved feed conversion (FC) during the first 2 weeks of study. FC was also improved during the fourth week of the experiment. Weights of breast yield and thigh meat yield were significantly increased, whereas quantity and percentage of abdominal fat were reduced by supplementall-carnitine. A significant interaction between supplemental dietaryl-carnitine and dietary energy level was noted for BWG and FC during the second week of study.

scholarly journals Effect of Different Levels of Local Concentrated Protein Manufactured from Slaughterhouse Wastes on some Carcasses Traits of Broiler

2021 ◽  
Vol 34 (1) ◽  
pp. 60-67
Author(s):  
Zaman K.F. Al-Mhsenawi ◽  
Majid H.A. Alasadi ◽  
Qutiba J.G. Al khfaji
Keyword(s):  
Protein Concentration ◽  
Protein Extraction ◽  
Relative Weight ◽  
Basal Diet ◽  
Abdominal Fat ◽  
Animal Protein ◽  
Carcass Weight ◽  
Efficient Alternative ◽  
Dressing Percentage ◽  
Different Levels

This study was conducted to determine the effect of different levels of local concentrated protein extracted from slaughterhouse wastes on some carcasses traits of broiler. A total of 225 female broiler Ross 308 chicks, one day, were used, randomized distributed into five treatments, with three replicates per treatment (15 chicks each replicate). The treatments were as follows: T1; basal diet contains 4% imported protein. T2; basal diet contains 2% imported protein+2% local manufactured protein. T3; basal diet contains 4% local manufactured protein. T4; basal diet contains 6% local manufactured protein. T5; basal diet contains 8% local manufactured protein. The results showed that there were no significant differences between the treatments on the carcass weight, dressing percentage, relative weights of the thigh and breast, as well as the relative weight of the abdominal fat. There were no significant differences among all treatments for the sensory traits of the thigh and breast. In conclusion, the locally manufactured animal protein extraction had no negative significant effect on the characteristics of carcasses and could be used as an efficient alternative to imported protein concentration used in broiler diets.

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