A COMPARISON OF SPECIFIC GRAVITY AND CARCASS MEASUREMENTS AS PREDICTORS OF BEEF CARCASS COMPOSITION

1985 ◽  
Vol 65 (1) ◽  
pp. 243-246 ◽  
Author(s):  
S. D. M. JONES ◽  
R. E. ROMPALA
Keyword(s):  
Specific Gravity ◽  
Key Words ◽  
Fat Content ◽  
Carcass Composition ◽  
Beef Carcass

Carcass specific gravity provided the best prediction of beef carcass fat content, and the best individual prediction of carcass lean content. The prediction of carcass lean content was improved by the addition of simple carcass measurements. However, carcass specific gravity offered only marginal improvements in predicting carcass composition over those provided by simple carcass measurements. Key words: Carcass composition, carcass grading, specific gravity, carcass measurements

THE EFFECT OF RIBBING SITE ON FAT THICKNESS MEASUREMENTS AND THE PREDICTION OF BEEF CARCASS COMPOSITION

1986 ◽  
Vol 66 (2) ◽  
pp. 541-545
Author(s):  
S. D. M. JONES ◽  
A. K. W. TONG ◽  
A. H. MARTIN ◽  
W. M. ROBERTSON
Keyword(s):  
Key Words ◽  
Fat Content ◽  
Carcass Composition ◽  
Prediction Equations ◽  
Beef Carcasses ◽  
Fat Thickness ◽  
Standard Deviations ◽  
Thickness Measurements ◽  
Beef Carcass

Over a 2-yr period, 409 beef carcasses were used to assess the differences of ribbing site (11/12th vs. 12/13th) on fat thickness measurements and the use of these measurements to predict carcass composition. Minimum fat thickness taken at the location specified for use under Canadian beef carcass grading procedures was 1.6 mm less, averaged over all carcasses at the 13th rib, compared with the same measurement taken at the 12th rib. Prediction equations for estimating carcass lean or fat content based on coefficients of determination and residual standard deviations had similar precision using fat thickness measurements from either ribbing site. These results are discussed in reference to National carcass grading procedures. Key words: Carcass grading, fat thickness, carcass composition

Growth of Lambs Offered a Fixed Amount of Roughage and Concentrate by Two Feeding Strategies

1986 ◽  
Vol 1986 ◽  
pp. 61-61
Author(s):  
R. G. Wilkinson ◽  
J. F. D. Greenhalgh
Keyword(s):  
Specific Gravity ◽  
Fat Content ◽  
Carcass Composition ◽  
Feeding Strategies ◽  
Mixed Diet ◽  
Fixed Amount ◽  
Maintenance Requirement ◽  
Significant Difference ◽  
Gravity Measurements ◽  
Similar Weight

Fixed amounts of roughage and concentrate can be allocated to growing ruminants in a number of different ways e.g. a) a mixed diet containing equal parts of roughage and concentrate b) split feeds, roughage being given alone until exhausted, then concentrate alone c) a mixture changing . progressively from all roughage to all concentrate d) half the animals given roughage and half concentrate. The results of these alternatives can be predicted from computer models based on current feeding standards. Recent evidence (Ørskov et al, 1981a; Williams et al, 1984) suggests that in cattle carcasses of similar weight and composition can be obtained by giving a fixed amount of roughage and concentrate as either a mixed diet, or as separate feeds, (i.e. alternatives (a) and (b), above)even though animals on (b) took significantly longer. (Ørskov et al (1981a) concluded that improved efficiency of energy utilisation in the split group could be accounted for by a decrease in the maintenance requirement of the animals, or an increase in the efficiency of energy utilisation during realimentation following a period of reduced nutrition. The results could also be explained by differences in carcass composition of the animals, since no measurement of the protein and fat content of the carcasses was made. Williams et al (1984) found no significant difference in carcass composition between the two groups, as determined by specific gravity measurements and concluded that associative effects caused a reduction in the energy available from straw when offered with barley in a mixed diet.

Quantitative Estimates of Beef Carcass Composition from Specific Gravity Measurements and Certain Carcass Traits of Feedlot Steers

1981 ◽  
Vol 53 (5) ◽  
pp. 1246-1255 ◽  
Author(s):  
A. Mata-Hernandez ◽  
J. A. Marchello ◽  
C. B. Roubicek ◽  
M. F. Ochoa ◽  
J. A. Bennett ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Carcass Traits ◽  
Carcass Composition ◽  
Feedlot Steers ◽  
Quantitative Estimates ◽  
Gravity Measurements ◽  
Beef Carcass

Some indices of the carcass composition of Dorset Horn Top Cross lambs. II. Specific gravity as an index of the fat content of the carcass and of various joints

1965 ◽  
Vol 65 (2) ◽  
pp. 155-158
Author(s):  
V. N. Khandekar ◽  
W. R. McManus ◽  
C. L. Goldstone
Keyword(s):  
Specific Gravity ◽  
Fat Content ◽  
Carcass Composition ◽  
Total Fat ◽  
The Relationship

An experiment was conducted to investigate the relationship between specific gravity and total fat content of the half-carcass. Specific gravity was found to be highly but negatively correlated with the percentage of fat in the half-carcass(r = −0·9841, P < 0·001).It was also found that the sample joint is a satisfactory index of fatness of joint as well as that of the half-carcass.

PATTERNS OF MUSCLE, BONE, AND FAT ACCRETION IN THREE BIOLOGICAL TYPES OF FEEDLOT BULLS FED THREE DIETARY ENERGY LEVELS

1985 ◽  
Vol 65 (2) ◽  
pp. 351-361 ◽  
Author(s):  
D. L. PATTERSON ◽  
M. A. PRICE ◽  
R. T. BERG
Keyword(s):  
Key Words ◽  
Energy Levels ◽  
Subcutaneous Fat ◽  
Body Cavity ◽  
Tissue Growth ◽  
Carcass Composition ◽  
Dietary Energy ◽  
Actual Weight ◽  
Age Range ◽  
Tissue Accretion

The effect of three types of diet on the carcass composition of 71 feedlot bulls of three biological types (Dairy Cross (DX), Hereford Cross (HX), and Beef Cross (BX)) was studied over a 2-yr period. Diets consisted of pelleted alfalfa with 0, 35 or 85% grain. Serial slaughter and carcass dissection into eight wholesale cuts and component tissues were carried out over an age range of 392–636 days. Interactions of biological type with diet-year were generally not significant for actual weight of muscle, bone and fat, or for weight of these tissues at a constant side subcutaneous fat weight of 16 kg. There were few significant effects of biological type or diet-year on the ratio of actual weight of subcutaneous to intermusclar plus body cavity fat. HX bulls had significantly less muscle and less bone than BX or DX, based on actual weights, but the rate of tissue accretion relative to side subcutaneous fat was the same for the three biological types. Animals on the lowest level of dietary energy had less weight of fat than did those on an 85% grain diet, but diet-year growth coefficients of tissue weights relative to side subcutaneous fat weight were generally homogeneous. It was concluded that effects of dietary energy were consistent over the biological types studied and for most of the wholesale cuts. Key words: Feedlot bulls, diet, biological types, tissue growth

Estimation of Lamb Carcass Composition by Use of Specific Gravity Measurements

1970 ◽  
Vol 31 (6) ◽  
pp. 1081-1088 ◽  
Author(s):  
Nelson J. Adams ◽  
Z. L. Carpenter ◽  
C. W. Spaeth
Keyword(s):  
Specific Gravity ◽  
Carcass Composition ◽  
Gravity Measurements

An examination of sample joint dissection and specific gravity techniques for assessing the carcass composition of steers slaughtered in commercial abattoirs

1973 ◽  
Vol 80 (3) ◽  
pp. 381-392 ◽  
Author(s):  
H. P. Ledger ◽  
B. Gilliver ◽  
J. M. Robb
Keyword(s):  
Specific Gravity ◽  
Carcass Composition ◽  
Estimation Technique ◽  
Prediction Efficiency ◽  
Gravity Estimation

SummaryThe relationships between joint and carcass specific gravities and composition are examined and the prediction efficiency of equations relating these parameters tabulated. The problems of assessing carcass composition in large abattoirs are indicated. The use of the tenth rib sample joint in conjunction with a specific gravity estimation technique is recommended.

Beef: Carcass Composition and Quality

2004 ◽  
pp. 58-60
Author(s):  
Mark F. Miller ◽  
Dale R. Woerner
Keyword(s):  
Carcass Composition ◽  
Beef Carcass

scholarly journals Influence of production system, age an sex on carcass parameters and some biochemical meat quality characteristics of reindeer (Rangifer tarandus tarandus L.)

Rangifer ◽  
2005 ◽  
Vol 25 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Sabine Sampels ◽  
Jana Pickova ◽  
Eva Wiklund
Keyword(s):  
Lipid Class ◽  
Animal Studies ◽  
Rangifer Tarandus ◽  
Fat Content ◽  
Carcass Composition ◽  
Adult Males ◽  
Lipid Class Composition ◽  
Class Composition ◽  
Significant Difference ◽  
Carcass Parameters

Carcass composition in reindeer is affected by feed intake and the age and sex of the animal. Studies have also shown that age, sex, carcass trim fat content and total intramuscular fat content (IMF) influence lipid class composition. The aim of this study was to compare lipid class composition and IMF in relation to carcass weight, conformation and trim fat content, and to investigate how these parameters are affected by age, sex and different feed sources. Five groups of reindeer were studied. Two groups of calves were fed two grain-based pelleted feeds with different lipid compositions for approximately two months before slaughter. One of these groups was fed with conventional pellets, and the other with pellets enriched with linseed cake to increase the amount of n-3 fatty acids in the diet. Three groups of grazing reindeer were also included in the study, consisting of adult males, adult females or calves. Reindeer calves fed pellets had higher slaughter weights, higher trim fat content and better carcass conformation scores compared to the grazing calves. However, there was no significant difference in IMF between pellet-fed and grazing calves. Adult female reindeer had the highest and grazing calves the lowest slaughter weights, trim fat and IMF. There was no difference in lipid class composition in meat from calves fed with the two pelleted feeds, whereas grazing calves had a higher amount of phospholipids. Squalene was identified and quantified as a component of intramuscular lipids in reindeer meat. Effekt av produktionssystem, ålder och kön på slaktkroppskvalitet och några biokemiska egenskaper hos renköttAbstract in Swedish / Sammandrag: Slaktkroppssammansättningen hos renar påverkas av både foderintag, fodersammansättning och djurens ålder och kön. Tidigare har vi visat att renens kön, ålder, mängden intramuskulärt fett (IMF) och putsfett på slaktkroppen påverkar sammansättningen av lipidklasser. Syftet med denna studie var att jämföra lipidklassammansättningen och IMF i relation till slaktkroppens vikt, form och mängden putsfett och att undersöka hur dessa parametrar påverkas av renarnas kön, ålder och olika typer av foder (bete och pellets). Fem grupper renar ingick i studien (totalt 38 djur). Två grupper kalvar utfodrades med två sorters pellets med olika fettsammansättning under två månader före slakt. Den ena gruppen fick normala pellets (CPD) (Renfor Bas) medan den andra gruppen fick pellets som hade en tillsats av linfrökaka (LPD) för att öka mängden n-3 fettsyror i fodret. Dessutom ingick tre grupper betesdjur i studien: vajor, sarvar och kalvar. Utfodring med pellets gav slaktkroppar med bättre klassning, högre slaktvikter och mer putsfett jämfört med slaktkroppar från betande kalvar. Vajorna hade de högsta och betande kalvar de lägsta slaktvikterna, minst putsfett och lägst halt av IMF. Utfodringen med pellets gav ingen signifikant skillnad i IMF mellan betande och utfodrade renkalvar. Vi fann ingen skillnad i lipidklassammansättning mellan de två utfodrade kalvgrupperna, men köttet från de betande kalvarna hade en högre halt av fosfolipider. Vi kunde också identifiera och kvantifiera squalen som en komponent i intramuskulärt fett i renkött.

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