HETEROSIS IN CROSSES BETWEEN THREE LINES OF YORKSHIRE SWINE SELECTED FOR FEED EFFICIENCY AND CARCASS QUALITY

1972 ◽  
Vol 52 (2) ◽  
pp. 444-447
Author(s):  
M. H. FAHMY ◽  
C. S. BERNARD
Keyword(s):  
Feed Efficiency ◽  
Carcass Quality

not available

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

THE EFFECTS OF SEX AND AGE OF MALE AT CASTRATION ON GROWTH AND CARCASS QUALITY OF YORKSHIRE SWINE

1961 ◽  
Vol 41 (1) ◽  
pp. 30-39 ◽  
Author(s):  
L. A. Charette
Keyword(s):  
Growth Rate ◽  
Iodine Number ◽  
Feed Efficiency ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Carcass Quality ◽  
Selection Of ◽  
Effect On Growth

The effects of sex and age of castration of males on growth rate, feed efficiency and carcass characteristics in bacon type swine were measured using 16 pigs each as gilts, entire boars, and boars castrated at birth, 6, 12, 16, and 20 weeks of age. Castration at 20 weeks was too late since some pigs reached 200 pounds live weight before that age. Boars consumed less feed daily than barrows and gilts, were thinner in loin fat, and yielded a higher percentage of shoulder than gilts. The carcasses of boars and gilts were longer, had less fat covering over the shoulder and back, a larger area of loin, and a higher iodine number than those castrated late. Acceptability tests showed that sex or age of castration did not affect the flavour, odour, or tenderness of the meat.Purebred breeders can delay castration for better selection of boars without any serious effect on growth, physical carcass characteristics, and feed requirements. Although the market discriminates against boars, it appears questionable whether castration is necessary when boars are slaughtered at 200 pounds before they reach the age of 150 days.

scholarly journals Non-invasive metabolomics biomarkers of production efficiency and beef carcass quality traits

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Virginia M. Artegoitia ◽  
J. W. Newman ◽  
A. P. Foote ◽  
S. D. Shackelford ◽  
D. A. King ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Production Efficiency ◽  
Average Daily Gain ◽  
Stepwise Logistic Regression ◽  
Carcass Quality ◽  
Physiological Mechanisms ◽  
Cattle Feed ◽  
Non Invasive ◽  
Fat Thickness ◽  
Stage 1

AbstractThe inter-cattle growth variations stem from the interaction of many metabolic processes making animal selection difficult. We hypothesized that growth could be predicted using metabolomics. Urinary biomarkers of cattle feed efficiency were explored using mass spectrometry-based untargeted and targeted metabolomics. Feed intake and weight-gain was measured in steers (n = 75) on forage-based growing rations (stage-1, 84 days) followed by high-concentrate finishing rations (stage-2, 84 days). Urine from days 0, 21, 42, 63, and 83 in each stage were analyzed from steers with the greater (n = 14) and least (n = 14) average-daily-gain (ADG) and comparable dry-matter-intake (DMI; within 0.32 SD of the mean). Steers were slaughtered after stage-2. Adjusted fat-thickness and carcass-yield-grade increased in greater-ADG-cattle selected in stage-1, but carcass traits did not differ between ADG-selected in stage-2. Overall 85 untargeted metabolites segregated greater- and least-ADG animals, with overlap across diets (both stages) and breed type, despite sampling time effects. Total 18-bile acids (BAs) and 5-steroids were quantified and associated with performance and carcass quality across ADG-classification depending on the stage. Stepwise logistic regression of urinary BA and steroids had > 90% accuracy identifying efficient-ADG-steers. Urine metabolomics provides new insight into the physiological mechanisms and potential biomarkers for feed efficiency.

The effects of nutrition on reproductive performance, lactation and carcass quality of once bred gilts

1995 ◽  
Vol 1995 ◽  
pp. 178-178
Author(s):  
A H Stewart ◽  
S A Edwards ◽  
V R Fowler
Keyword(s):  
Sugar Beet ◽  
Reproductive Performance ◽  
Feed Efficiency ◽  
Reproductive Physiology ◽  
Sugar Beet Pulp ◽  
Energy Sources ◽  
Carcass Quality ◽  
Beet Pulp ◽  
Ad Libitum

The once bred gilt system of production has a number of benefits in terms of feed efficiency and welfare, however the system relies on the production of a quality carcass and acceptable reproductive performance. Previous studies have indicated that welfare might be improved if gilts were ad-libitum fed a diet containing 60% Sugar beet pulp (Stewart et al 1993). There was a suggestion however that reproductive physiology may be put at risk using such a diet. The objective of this experiment was to identify differences in reproductive performance using two different energy sources in gestation and to manipulate nutrition during lactation to study the effect on carcass quality.

Gain, Feed Efficiency and Carcass Quality of Finishing Swine Fed Raw Soybeans

1987 ◽  
Vol 64 (1) ◽  
pp. 177-181 ◽  
Author(s):  
J. E. Pontif ◽  
L. L. Southern ◽  
D. F. Coombs ◽  
K. W. McMillin ◽  
T. D. Bidner ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Carcass Quality

THE EFFECT OF HORMONES, BUFFER SALTS, AND PROTEIN QUALITY ON THE FEEDING OF SPRING LAMBS

1964 ◽  
Vol 44 (2) ◽  
pp. 179-183 ◽  
Author(s):  
W. C. Woolfitt ◽  
W. E. Howell ◽  
J. M. Bell
Keyword(s):  
Sodium Bicarbonate ◽  
Feed Efficiency ◽  
Sodium Citrate ◽  
Fish Meal ◽  
Protein Quality ◽  
Linseed Oil ◽  
Carcass Quality ◽  
Significant Change ◽  
Better Than

Lambs treated with ear implants of estradiol–progesterone and diethylstilbestrol (DES) were similar to the control lambs in rate of gain, feed efficiency, and carcass grade. Lambs receiving diethylstilbestrol orally appeared to respond less favorably than the control lambs. The gains of lambs receiving sodium bicarbonate were somewhat better than controls, approaching significance at the 5% level. Feed efficiency was improved in the sodium bicarbonate group with no significant change in carcass quality. Lambs fed rations that contained 2% sodium citrate or 2% sodium bicarbonate plus 2% sodium citrate gained more slowly than the control lambs. In addition, feed efficiency was adversely affected. There was no advantage in feeding fish meal in lieu of linseed oil meal.

scholarly journals Non-Invasive Metabolomics Biomarkers of Production Efficiency and Beef Carcass Quality Traits

2021 ◽  
Author(s):  
Virginia M. Artegoitia ◽  
J. W. Newman ◽  
A. P. Foote ◽  
S. D. Shackelford ◽  
D.A. King ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Production Efficiency ◽  
Average Daily Gain ◽  
Stepwise Logistic Regression ◽  
Carcass Quality ◽  
Physiological Mechanisms ◽  
Cattle Feed ◽  
Non Invasive ◽  
Fat Thickness ◽  
Stage 1

Abstract The inter-cattle growth variations stem from the interaction of many metabolic processes making animal selection difficult. We hypothesized that growth could be predicted using metabolomics. Urinary biomarkers of cattle feed efficiency were explored using mass spectrometry-based untargeted and targeted metabolomics. Feed intake and weight-gain was measured in steers (n=75) on forage-based growing rations (stage-1, 84 d) followed by high-concentrate finishing rations (stage-2, 84 d). Urine from days 0, 21, 42, 63, and 83 in each stage were analyzed from steers with the greater (n = 14) and least (n = 14) average-daily-gain (ADG) and comparable dry-matter-intake (DMI; within 0.32 SD of the mean). Steers were slaughtered after stage-2. Adjusted fat-thickness and carcass-yield-grade increased in greater-ADG-cattle selected in stage-1, but carcass traits did not differ between ADG-selected in stage-2. Overall 85 untargeted metabolites segregated greater- and least-ADG animals, with overlap across diets (both stages) and breed type, despite sampling time effects. Total 18-BAs and 5-steroids were quantified and associated with performance and carcass quality across ADG-classification depending on the stage. Stepwise logistic regression of urinary BA and steroids had >90% accuracy identifying efficient-ADG-steers. Urine metabolomics provides new insight into the physiological mechanisms and potential biomarkers for feed efficiency.

EFFECTS OF LEVELS OF DRIED APPLE POMACE IN SWINE RATIONS ON GROWTH RATE, FEED EFFICIENCY, CARCASS QUALITY AND SIZE OF CERTAIN ORGANS

1959 ◽  
Vol 39 (1) ◽  
pp. 26-33 ◽  
Author(s):  
D. M. Bowden ◽  
J. C. Berry
Keyword(s):  
Growth Rate ◽  
Small Intestine ◽  
Large Intestine ◽  
Feed Efficiency ◽  
Crude Protein ◽  
Apple Pomace ◽  
Feed Consumption ◽  
Carcass Quality ◽  
Dressing Percentage ◽  
Daily Gain

Two experiments, involving 84 Yorkshire feeder pigs, were conducted to test rations containing various levels of dried apple pomace. In the first experiment dried apple pomace was used at levels of 0,10,20, and 30 per cent by weight of the ration and in the second experiment at 0,20, and 40 per cent.At pomace levels up to 20 per cent no significant change occurred in daily gain, dressing percentage, carcass quality or weight of heart, liver, spleen or small intestine, in either experiment. In the second experiment, there was significantly greater feed consumption per unit of gain, heavier large intestine and lighter stomach at the 20 per cent pomace level. Increasing the pomace level to 40 per cent resulted in significantly slower growth, lower dressing percentage, greater feed consumption per unit gain, leaner carcass, heavier liver, lighter stomach, and heavier large intestine.In the second experiment, an estimated difference of 2–3 per cent crude protein in the two rations fed at each pomace level had no significant effect on any of the characteristics or organs studied.

scholarly journals RAW SOYBEANS IN SWINE GROWING–FINISHING RATIONS

1967 ◽  
Vol 47 (3) ◽  
pp. 227-236 ◽  
Author(s):  
L. G. Young
Keyword(s):  
Growth Rate ◽  
Soybean Meal ◽  
Feed Efficiency ◽  
Carcass Characteristics ◽  
The Other ◽  
Carcass Quality ◽  
Live Performance ◽  
Eye Muscle ◽  
Supplemental Protein ◽  
Finisher Diets

Two trials involving a total of 120 Yorkshire SPF swine were conducted to evaluate the effect on live performance and carcass characteristics of replacing supplemental protein from 44% soybean meal (SM) with that from raw ground soybeans (RGS). Levels of 10.80, 16.45 and 22.15% RGS in the grower diets caused slower growth rates and reduced feed efficiency compared with those of pigs that did not receive RGS in their diets (P < 0.05). Although the results were not as consistent as in the grower phase, levels of 11.25 and 15.15% RGS in the finisher diets caused slower growth rate. Pelleting of a diet containing 3.65% RGS resulted in improved feed efficiency compared with that of the same diet unpelleted, when fed in the grower phase (P < 0.05). The area of the loin eye muscle tended to become smaller as the level of RGS in the diet increased. Treatment had no consistent effect on the other measures of carcass quality studied.

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