The effect of age, live-weight and rate-of-gain on dressing percentage and non-saleable fat content of Israel-Friesian bull calves

1967 ◽  
Vol 9 (1) ◽  
pp. 115-119 ◽  
Author(s):  
D. Levi ◽  
M. Soller ◽  
A. Shilo
Keyword(s):  
Genetic Correlation ◽  
Live Weight ◽  
Fat Content ◽  
Carcass Weight ◽  
Bull Calves ◽  
Kidney Fat ◽  
Dressing Percentage ◽  
Highly Correlated ◽  
Effect Of Age

Data were collected during 1961–2 on the live-weight, age and warm carcass weights of 83 lots of Israel-Friesian bull calves, 525 animals in all, the offspring of 26 sires. For varying numbers of these animals weight of various non-saleable fat components, including ruminal fat, kidney fat, inguinal fat and scapular fat were also obtained. Ruminal fat alone and ruminal fat plus kidney fat were found to be highly correlated with total non-saleable fat (r = 0·84 and 0·94, respectively). Heritability of dressing percentage was 0·20, of live-weight rate-of-gain 0·92, and of carcass rate-ofgain 0·49. The genetic correlation between live-weight and carcass weight was 0·7. Between-lot correlations indicated that increased rate-of-gain achieved through management will be accompanied by decreased dressing percentage and increased non-saleable fat content.

scholarly journals Effect of age on slaughterhouse by-products of indigenous cattle of Bangladesh

2013 ◽  
Vol 42 (1) ◽  
pp. 62-66 ◽  
Author(s):  
MM Ali ◽  
MM Hossain ◽  
S Akhter ◽  
MS Islam ◽  
MA Hashem
Keyword(s):  
Chemical Composition ◽  
Live Weight ◽  
Carcass Weight ◽  
Average Weight ◽  
Meat Industry ◽  
Age Group ◽  
Indigenous Cattle ◽  
Dressing Percentage ◽  
Effect Of Age ◽  
By Products

The present study was conducted to investigate the effect of age on slaughterhouse by-products and their chemical composition of indigenous cattle of Bangladesh. Live weight, warm carcass weight and dressing percentage of different age group (T1= 0 Tooth, T2= 2 Teeths, T3= 4 Teeths, T4= 6 Teeths and T5= 8 Teeths) of indigenous cattle were estimated. Average live weight and warm carcass weight of indigenous cattle was 167.64±79.93 kg and 84.83±47.88 kg, respectively on which age has significant effect. The average dressing percentage of indigenous cattle was 48.99±4.84. The average weight (kg) of inedible by-products eg. blood, hide, tail, scrotum, penis, cannon, horn, ear and tail was 6.35±0.69, 14.02±1.66, 0.34±0.03, 0.27±0.02, 0.28±0.03, 2.74±0.22, 0.33±0.04 and 0.17±0.02, respectively on which age has significant effect. The average weight (kg) of edible by-products eg. liver, heart, kidney, lung, brain, spleen, empty stomach, empty intestine, head and tongue was 2.40±0.22, 0.55±0.06, 0.35±0.04, 1.43±0.14, 0.33±0.01, 0.46±0.04, 6.32±0.74, 4.77±0.52, 8.21±0.78 and 0.48±0.04, respectively on which age has significant effect. The chemical composition of edible by-products was more or less similar to the main products of meat industry. DOI: http://dx.doi.org/10.3329/bjas.v42i1.15784 Bang. J. Anim. Sci. 2013. 42 (1): 62-66

Effects of the percentage of Texel or Rouge de ľOuest genes in lambs on carcass characteristics and meat quality

1999 ◽  
Vol 69 (1) ◽  
pp. 81-92 ◽  
Author(s):  
A. F. Carson ◽  
B. W. Moss ◽  
R. W. J. Steen ◽  
D. J. Kilpatrick
Keyword(s):  
Meat Quality ◽  
Subcutaneous Fat ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Fat Content ◽  
Carcass Weight ◽  
Ewe Lambs ◽  
Bone Content ◽  
Intermuscular Fat ◽  
Ram Lambs

AbstractThis study investigated the effects of the percentage of Texel or Rouge de l’Ouest (Rouge) genes in lambs (0, 50, 75 or 100%; the remainder being Greyface (Border Leicester × Scottish Blackface)) on lamb carcass characteristics and meat quality. Ewe lambs were slaughtered at 34, 40, 46 and 52 kg and ram lambs were slaughtered at 40, 46, 52 and 58 kg live weight. Dressing proportion increased (P < 0·001) by 0·53 and 0·27 g carcass weight per kg live weight for each 1% increase in Texel or Rouge genes respectively. Carcass conformation classification increased (P < 0·001) by 0·016 and 0·007 units (on a five-point scale) for each 1% increase in Texel or Rouge genes respectively. Carcass fat depth measures were reduced by Texel and Rouge genes such that at a constant fat depth end point, carcass weight could be increased by 0·029 and 0·023 kg for each 1% increase in Texel or Rouge genes. Carcass lean content increased (P < 0·001) by 0·99 and 0·27 g/kg for each 1% increase in Texel or Rouge genes. Subcutaneous fat content was reduced (P < 0·001) by 0·36 and 0·29 g/kg for each 1% increase in Texel or Rouge genes. Intermuscular fat content was reduced (P < 0·01) by 0·38 g/kg per 1% increase in Texel genes, whereas Rouge genes had no effect. Similarly, bone content was reduced (P < 0·01) by Texel genes only (0·31 g/kg per 1% increase in Texel genes). Warner-Bratzler shear force values showed a quadratic effect with increasing Texel and Rouge genes, with an initial decrease from 0 to 50% followed by an increase to 100%. Cooking loss increased (P = 0·05) as the percentage of Rouge genes in lambs increased. Increasing the percentage of Texel or Rouge genes significantly increased L* values (P < 0·01 and P < 0·05 respectively), b* values (P = 0·05 and P< 0·05 respectively) and H° values (P < 0·001).

Carcass composition and tissue weight distribution in purebred lambs from six breeds

1984 ◽  
Vol 8 ◽  
pp. 103-103
Author(s):  
A. J. Brown ◽  
B. W. Butler-Hogg ◽  
J. D. Wood
Keyword(s):  
Weight Distribution ◽  
Live Weight ◽  
Fat Content ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Carcass Quality ◽  
Quality Changes ◽  
Tissue Weight ◽  
Mature Size

Future improvements in British lamb sales depend on increasing the lean to fat ratio in cuts and joints offered for sale, since numerous surveys have shown an aversion to fat on the part of consumers. This ratio can be changed by manipulating breed and live weight at slaughter, since breeds of large mature size slaughtered at light weights are considerably leaner than those of small mature size slaughtered at heavy weights. However, there are other aspects of carcass value than overall lean and fat content. These include factors such as the proportions of individual joints and their composition. This study was carried out to examine carcass composition and carcass quality changes between 12 and 24 kg cold carcass weight (CCW) in 317 castrated males and 238 females from six pure breeds.

scholarly journals Feed efficiency and carcass metrics in growing cattle1

2019 ◽  
Vol 97 (11) ◽  
pp. 4405-4417 ◽  
Author(s):  
David N Kelly ◽  
Craig Murphy ◽  
Roy D Sleator ◽  
Michelle M Judge ◽  
Stephen B Conroy ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Production Efficiency ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
Live Weight ◽  
Residual Energy ◽  
Feedlot Cattle ◽  
Carcass Weight ◽  
Research Perspective ◽  
Dressing Percentage

Abstract Some definitions of feed efficiency such as residual energy intake (REI) and residual gain (RG) may not truly reflect production efficiency. The energy sinks used in the derivation of the traits include metabolic live-weight; producers finishing cattle for slaughter are, however, paid on the basis of carcass weight, as opposed to live-weight. The objective of the present study was to explore alternative definitions of REI and RG which are more reflective of production efficiency, and quantify their relationship with performance, ultrasound, and carcass traits across multiple breeds and sexes of cattle. Feed intake and live-weight records were available on 5,172 growing animals, 2,187 of which also had information relating to carcass traits; all animals were fed a concentrate-based diet representative of a feedlot diet. Animal linear mixed models were used to estimate (co)variance components. Heritability estimates for all derived REI traits varied from 0.36 (REICWF; REI using carcass weight and carcass fat as energy sinks) to 0.50 (traditional REI derived with the energy sinks of both live-weight and ADG). The heritability for the RG traits varied from 0.24 to 0.34. Phenotypic correlations among all definitions of the REI traits ranged from 0.90 (REI with REICWF) to 0.99 (traditional REI with REI using metabolic preslaughter live-weight and ADG). All were different (P < 0.001) from one suggesting reranking of animals when using different definitions of REI to identify efficient cattle. The derived RG traits were either weakly or not correlated (P > 0.05) with the ultrasound and carcass traits. Genetic correlations between the REI traits with carcass weight, dressing difference (i.e., live-weight immediately preslaughter minus carcass weight) and dressing percentage (i.e., carcass weight divided by live-weight immediately preslaughter) implies that selection on any of the REI traits will increase carcass weight, lower the dressing difference and increase dressing percentage. Selection on REICW (REI using carcass weight as an energy sink), as opposed to traditional REI, should increase the carcass weight 2.2 times slower but reduce the dressing difference 4.3 times faster. While traditionally defined REI is informative from a research perspective, the ability to convert energy into live-weight gain does not necessarily equate to carcass gain, and as such, traits such as REICW and REICWF provide a better description of production efficiency for feedlot cattle.

scholarly journals EFFECTS OF BREED OF SIRE AND BREED OF DAM OF COW ON CARCASS CHARACTERISTICS OF THREE-WAY CROSS BEEF CATTLE REARED AT TWO LOCATIONS

1983 ◽  
Vol 63 (4) ◽  
pp. 791-802 ◽  
Author(s):  
G. W. RAHNEFELD ◽  
H. T. FREDEEN ◽  
G. M. WEISS ◽  
J. A. NEWMAN ◽  
J. E. LAWSON
Keyword(s):  
Beef Cattle ◽  
Key Words ◽  
Carcass Characteristics ◽  
Carcass Weight ◽  
Cattle Breeds ◽  
Kidney Fat ◽  
Dressing Percentage ◽  
Carcass Cuts

Carcass characteristics of 3673 steers and heifers born over a 6-yr period 1973–1978 at Brandon, Manitoba (farm conditions) and Manyberries, Alberta (range conditions) were compared. Calves weaned at Manyberries were fed and evaluated at Lacombe. The progeny were out of 10 specific F1 crosses of dams mated to bulls of the Charolais (C), Simmental (S), Limousin (L) and Chianina (Chi) breeds. Dam crosses included the Hereford × Angus (HA) and crosses sired by C, S and L sires out of H, A and Shorthorn (N) dams. Breed of sire of dam effects indicated that progeny from S cross cows generally had the heaviest carcasses S = C > L, the greatest carcass weight per day of age S = C > L, the highest percentage of dissected bone of the round S > C > L and rib S > C = L, the highest proportions of brisket S > L > C and flank S > L = C, and carried more kidney fat (percent liveweight) S > C = L and average rib fat S > C = L. Progeny from Limousin and Charolais cross cows had the highest dressing percentage [Formula: see text] and rib eye area/100 kg carcass wieght L > C > S while those from Limousin cross cows had the highest proportion of long loin and the combined lean cuts (rib, round and long loin) a higher percentage of dissected lean in the round L > C > S and the highest lean-to-bone ratio L > C > S. Progeny from dams of Shorthorn breeding generally had the heaviest carcasses, the greatest carcass weight per day of age, the highest percentage kidney fat and at Brandon the greatest proportions of plate and brisket. Hereford cross dams consistently produced progeny with the highest percentage head H = A > N, hide [Formula: see text], feet H > A = N, percentage bone in the long loin [Formula: see text], round [Formula: see text], and rib [Formula: see text], and the highest percentage lean in the long loin H > N (Brandon) and chuck H > N (Brandon). The progeny from Angus cross dams carried the greatest average rib fat [Formula: see text], had the greatest rib eye area/100 kg carcass weight [Formula: see text], the highest percentage lean in the round [Formula: see text], and the highest lean to bone ratio A > H = N. Key words: Cattle, breeds, carcass, cuts, composition

GENETIC AND PHENOTYPIC PARAMETERS OF CARCASS TRAITS IN RAM LAMBS REARED ARTIFICIALLY IN A CONTROLLED ENVIRONMENT

1986 ◽  
Vol 66 (4) ◽  
pp. 905-914 ◽  
Author(s):  
J. N. B. SHRESTHA ◽  
A. FORTIN ◽  
D. P. HEANEY
Keyword(s):  
Carcass Traits ◽  
Genetic Correlations ◽  
Carcass Weight ◽  
Research Centre ◽  
Controlled Environment ◽  
Kidney Fat ◽  
Genetic And Phenotypic Correlations ◽  
Ram Lambs ◽  
Dressing Percentage ◽  
Retail Cuts

Genetic and phenotypic relationships among carcass traits were calculated for 654 ram lambs from 210 sires of three synthetic strains developed at the Animal Research Centre. Lambs were housed indoors in a controlled environment on expanded metal floors and reared artificially with milk replacer and solid diets. Paternal half-sib estimates of heritability at 36-kg body weight and 116 of age were moderate to high ranging from 0.38 to 0.67 for shoulder and leg (trimmed and lean), total trimmed retail cuts, total lean, chilled carcass weight and lean weight per day (P < 0.01). Estimates of phenotypic and genetic correlations between the above traits showed a significantly favorable relationship indicating their usefulness as criteria in selection for meatiness. Heritability estimates for front, back and total in rough retail cuts, trimmed loin cuts, lean in rack and loin, kidney fat weight and dressing percentage ranged from −0.19 to 0.27 (P > 0.05). Estimates involving loin, rack, front, back, total retail cuts, kidney fat wt, dressing percentage and chilled carcass weight per day showed lower and nonsignificant relationships with total trimmed retail cuts or total lean. Key words: Sheep, heritability, genetic and phenotypic correlations, lamb carcass traits

Path analysis and robust prediction of lamb carcass composition

1989 ◽  
Vol 48 (1) ◽  
pp. 139-148 ◽  
Author(s):  
G. L. Bennett
Keyword(s):  
Path Analysis ◽  
Live Weight ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Direct Effects ◽  
Management Group ◽  
Kidney Fat ◽  
Fat Composition ◽  
Group Relationships ◽  
Robust Prediction

ABSTRACTPath analysis was applied to correlations among lamb carcass measurements. Correlations were obtained from lamb carcasses averaging 15·7 kg and 270 g fat per kg carcass weight. Correlations were adjusted to represent within breed, sex and management group relationships. The purpose of the analysis was to study the relationships of carcass weight with carcass measurements and to identify carcass measurements that are independent other than through their relationships with carcass chemical fat concentration and carcass weight. The direct effect of live weight on all carcass measurements was positive. Thus, heavier carcasses with the same fat concentration had larger fat and tissue depths, muscle measurements, leg measurements and kidney fat weights. The results of correlations among the residuals suggest that fat depths C and J, specific gravity, muscle width A and kidney fat weight are nearly independent estimates of carcass composition in the sense that they are only correlated through their relationships with carcass weight and carcass fat composition. Robust predictors of carcass composition were developed by first adjusting carcass measurements for the direct effects of carcass weight and then computing regressions on the adjusted measurements. These predictors appeared to be better predictors of environmental and genetic differences than least-squares multiple regression yet reduced the accuracy of within group prediction only slightly.

scholarly journals Carcass value of the progeny of tested beef bulls

2011 ◽  
Vol 49 (No. 7) ◽  
pp. 315-322 ◽  
Author(s):  
P. Polách ◽  
J. Šubrt ◽  
M. Bjelka ◽  
K. Uttendorfský ◽  
R. Filipčík
Keyword(s):  
Czech Republic ◽  
Beef Cattle ◽  
Fat Content ◽  
Carcass Weight ◽  
Control Groups ◽  
The Czech Republic ◽  
Dressing Percentage ◽  
Beef Bulls

In the study focused on the estimation of the efficiency of beef cattle in the conditions of the Czech Republic, 361 half-carcasses of the offspring of crossbred bulls of tested young beef sires were dissected. The bulls were fattened together and slaughtered at the age of 500 &plusmn; 30 days. The tested breeds were Aberdeen Angus (AA), Blonde d&rsquo;Aquitaine (BA), Belgian Blue (BB), Charolais (CH), Hereford (HE), Limousine (LI), and Piemontese (PI). The control groups were bulls of the Czech Pied (C) and Holstein (H) breeds. The best commercial class according to the SEUROP system was found in the offspring of Charolais sires (3.17). The fat content was the highest in the BB group (2.45) and the lowest (P &lt; 0.01) in the PI group (1.50). The average hot carcass weight was 332.54 kg and was significantly (P &lt; 0.05) the lowest in bulls of the HE group (290.50 kg). After dissection the dressing percentage of meat, bone, separable fat, and the meat/bone ratio were calculated. The average meat percentage in the carcass was 78.47%. The dressing percentage of meat of PI group was 80.33% and was the highest of all the groups (P &lt; 0.01). H group showed the highest proportion of bones (19.79%), which was by 2% higher than in PI group. The content of separable fat ranged between 1.29 and 3.68%. &nbsp;

scholarly journals Estimation of carcass characteristics in young beef cattle

1975 ◽  
Vol 47 (5) ◽  
pp. 385-444
Author(s):  
Hilkka Ruohomäki
Keyword(s):  
Stepwise Regression ◽  
Least Squares Method ◽  
Age Groups ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Accurate Estimation ◽  
Carcass Quality ◽  
Bull Calves

In the present study the main objectives were to determine whether sufficiently accurate estimation of live weight, carcass weight and carcass composition with live measurements is possible, and whether an accurate estimation of carcass composition with any other procedure than total carcass dissection is possible. The material consisted of 205 1-year old steers and bulls and 174 bull calves. Within experiment each trait of each animal was corrected for age, breed and feeding with a correction factor obtained with the least squares method. In the stepwise regression analysis the results for both age groups were analysed separately. From live measurements the best estimators in both age groups were width of chest, heart girth and natural length. The most reliable predictor of meat quantity was carcass weight. Revalue was 96 % for both age groups. In estimation of meat percentage the Revalue obtained for the olds with cutting results of fore shanks was 56 %, the respective value for the 1-year olds was considerably lower. With 1-yearolds the carcass weight and some byproducts gave the highest estimations for the quantity and percentage of fat, R2 were 62 % and 50 % respectively, and for the 14-yearolds the kidney fats and the cutting results of flanks gave the highest estimations, R2 were 70 % and 59 % respectively. For the quantity and percentage of bone the R2 for the 1-yearolds obtained with cutting results of shanks were 68 % and 55 % respectively, and for the 14-year olds 82 % and 70 % respectively. When the cutting results of the fore and hind quarters were used as estimators the R2 obtained for all the traits were higher in both age groups than with any other estimator, R2 obtained with carcass quality scores remained lower.

scholarly journals Response of supplemental cassava root sievate - cassava leaf meal based diets on carcass and cost benefits of kano brown goats Capra aegagrus

2018 ◽  
Vol 3 (2) ◽  
pp. 60-68
Author(s):  
Ahaotu E. Obioha ◽  
Okorie Kennedy ◽  
Akinfemi Abayomi ◽  
Emeribe E. Okechukwu
Keyword(s):  
Live Weight ◽  
Cost Benefit ◽  
Basal Diet ◽  
Carcass Weight ◽  
Pennisetum Purpureum ◽  
Cost Benefits ◽  
Leaf Meal ◽  
Cassava Root ◽  
Feed Cost ◽  
Dressing Percentage

The experiment was conducted to determine the organ weight characteristics, carcass yield and cost benefits of Kano Brown goats fed cassava root sievate and cassava leaf meal (CRSCLM) based diets as supplement to (Pennisetum  purpureum) using 36 Kano Brown goats of 8 to 10 months of age.Four diets T1, T2, T3,and T4, were formulated at the levels of 0%, 20%, 40% and 60% CRSCLM respectivelyin a completely randomized design. Each animal received a designated treatment diet in the morning for 97 days. Feed offered was based on 3.5% body weight per day; the animals in addition were fed a kg wilted chopped P. purpureum later in the day as basal diet to enhance rumination and fine chewing. Results on  carcass indices showed significant (p<0.05) response on live weight at slaughter, empty carcass weight, warm carcass weight, dressing percentage, shoulder, leg, loin, end and shank with T4having relatively best results. The dressing percentage was numerically (49.59%) best at T4. On the offal weights, head and full guts were significantly (p<0.05) improved for T4and T1goats. The organ characteristic proved the safety of using CRSCLM through the significantly (p<0.05) lower organ weights at T4goats. Cost per kg feed, feed cost/weight gainand cost/benefit ratio were positively influenced (p<0.05) at T4with expected income of 4.79 / 1 invested. It could therefore be concluded that Kano Brown goats fed 60% CRSCLM had the best carcass and organ yields at a reduced feed cost. Keywords: Pennisetum purpureum, Kano brown goats, Cassava leaf meal, Cassava root sievate, 

Sign in / Sign up

Export Citation Format

Share Document