scholarly journals Prediction of Carcass Traits of Santa Inês Lambs Finished in Tropical Pastures through Biometric Measurements

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2329
Author(s):  
Antonio Leandro Chaves Gurgel ◽  
Gelson dos Santos Difante ◽  
João Virgínio Emerenciano Neto ◽  
Cynthia Gabriela Fernandes de Araújo ◽  
Marcone Geraldo Costa ◽  
...  
Keyword(s):  
Carcass Traits ◽  
Live Weight ◽  
Carcass Weight ◽  
Panicum Maximum ◽  
Leg Length ◽  
Brachiaria Brizantha ◽  
Tropical Pastures ◽  
Thigh Circumference ◽  
Biometric Measurements ◽  
Santa Inês

The aim of this study was to predict carcass traits of Santa Inês lambs finished in tropical pastures by using biometric measurements. Data originated from two experiments involving 56 lambs (32 in experiment I and 24 in experiment II). In both experiments, the sheep were finished in that were finished in pastures of Panicum maximum and Brachiaria brizantha, experiment I being conducted in the rainy season and experiment II in the dry season. The following biometric measurements were recorded before slaughter: body length (BL), withers height (WH), rump height (RH), thorax width (TW), rump width (RW), chest width (CW), heart girth (HG), thigh circumference (TC), rump circumference (RC) and leg length (LL), in addition to live weight at slaughter (SW). After slaughter, hot carcass weight (HCW), cold carcass weight (CCW) and the weights of primal cuts (shoulder, neck, loin, leg and rib) were recorded. In the equations generated to predict SW, HCW and CCW, R2 ranged from 0.58 to 0.91 and the measurements of WH, TC, CW, HG and RW were the most relevant. In the equations developed to predict the weight of primal cuts, in turn, R2 ranged from 0.26 to 0.99. In these models, SW, BL, CW, TC, LL and HG explained most of the variation in the weight of primal cuts. Biometric measurements can be used to accurately and precisely predict HCW, CCW and the weight of primal cuts from the carcass of Santa Inês sheep finished in tropical pastures, since the equations presented R2 and correlation coefficient and agreement above 0.8.

scholarly journals Effects of type of tropical pasture and concentrate supplementation level on the carcass traits of grazing lambs

2020 ◽  
Vol 63 (2) ◽  
pp. 283-291
Author(s):  
Gustavo Daniel Vega Britez ◽  
Fernando Miranda Vargas Junior ◽  
Marciana Retore ◽  
Marcelo Corrêa Silva ◽  
Luana Liz Medina Ledesma ◽  
...  
Keyword(s):  
Body Weight ◽  
Discriminant Analysis ◽  
Carcass Traits ◽  
Panicum Maximum ◽  
Factorial Experimental Design ◽  
Brachiaria Brizantha ◽  
Tropical Pastures ◽  
Concentrate Supplementation ◽  
Weight Yield

Abstract. The nutritional requirements can be met, and carcass quality can be achieved by using concentrate supplementation in the diets of grazing lambs. This study evaluated the effects of different concentrate supplementation rates (0 %, 1.5 %, and 3 % of body weight) and tropical pastures (Panicum maximum cv. `Aruana' and Brachiaria brizantha cv. `Marandu') on lamb carcass traits. Thirty-six male Suffolk lambs, with an initial body weight of 22.54 ± 2.72 kg, were evaluated in a 3 × 2 factorial experimental design. The concentrate used consisted of milled soybean, maize, and oat grains. The pasture species affected empty body weight and commercial cuts. The use of concentrate supplementation affected carcass weight, yield, indexes, and commercial cuts. Also, the use of concentrate supplementation improved the weight of muscle and fat content. Based on discriminant analysis it is possible to identify the rearing systems, when all variables where used, or the level of concentrate supplementation when variables of weight were used. Carcasses of animals on grass-only diets were different and easier to discriminate. The use of concentrate supplementation on rearing lambs improves the quality of carcass traits. The period of finishing can be shorted with supplementation of 3 % of body weigh in Aruana and Marandu grass. The discriminant analysis can identify the differences between rearing systems based on all carcass traits. This analysis can be used to develop carcass traceability systems.

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 Influence of Crossbreeding of Ghezel Ram With Grey Shirazi Ewe on Growth Performance, Feed Efficiency and Carcass Traits of Fattening Lambs

2021 ◽  
Author(s):  
Abdolhamid Karimi ◽  
Mohammad Javad Abarghuei ◽  
Alidad Boostani
Keyword(s):  
Body Weight ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Live Weight ◽  
Carcass Weight ◽  
Feed Conversion ◽  
Final Body Weight ◽  
Group 12

Abstract In this investigation, performance, feed efficiency and carcass traits of 48 weaned crossbred Grey Shirazi × Ghezel and purbred Grey Shirazi fattening lambs (mean live weight, 28.5 ± 0.5 kg and age, 115 ± 5 days) were evaluated. Lambs were divided into 4 groups contain the GM group (12 purebred male lambs of Grey Shirazi ewe × Grey Shirazi ram), the GF group (12 purebred female lambs of Grey Shirazi ewe × Grey Shirazi ram), the CM group (12 crossbred male lambs of Grey Shirazi ewe × Ghezel ram) and the CF group (12 crossbred female lambs of Grey Shirazi ewe × Ghezel ram). The dry matter intakes (DMI), average daily gain (ADG) and carcass traits in the lambs were determined. The DMI was greater in CF lambs compared to GF lambs (P < 0.001). Feed conversion ratio (FCR) was higher in male lambs comparing to female lambs (P = 0.001). The final body weight, ADG, live weight at the slaughtering and hot carcass weight (HCW) were lower in GF lambs compared to another lambs (P < 0.001, P = 0.003). Cold carcass weight (CCW) in CM lambs was higher than in other groups. The Longissimus dorsi (LD) area was higher in crossbreed male lambs (P = 0.001). Crossbreeding improved grow performance (final body weight and ADG) in male and female lambs. Carcass trait was improved by crossbreeding especially in male lambs. Sex effect on growth performance and carcass traits was noticeable and male lambs had superior growth.

Evaluation of eleven cattle breeds for crossbred beef production: carcass data from males slaughtered at two ages

1990 ◽  
Vol 50 (1) ◽  
pp. 79-92 ◽  
Author(s):  
C. A. Morris ◽  
R. L. Baker ◽  
A. H. Carter ◽  
S. M. Hickey
Keyword(s):  
Carcass Traits ◽  
Genetic Correlations ◽  
Live Weight ◽  
High Energy ◽  
Carcass Weight ◽  
Standard Errors ◽  
Slaughter Weight ◽  
Random Samples ◽  
Slaughter Age ◽  
Sire Breed

ABSTRACTAn experiment was carried out to compare sire breeds for carcass traits and to estimate heritabilities and phenotypic and genetic correlations. There were 1908 male cattle from 5 birth years. The sire breeds, each evaluated over three locations, were Blonde d'Aquitaine, Charolais, Chianina, Limousin, Maine Anjou, Simmental (four strains: Austrian, French (Pie Rouge), Swiss and West German) and South Devon (i.e. seven imported breeds) and Angus, Friesian, Hereford and Jersey (four local breeds), with a total of 161 sires represented. Each location contained Angus cows and additionally one location contained Hereford cows. Proportionally 0·72 of the cattle were slaughtered at about 20 months of age, whilst random samples from each of the first 4 years were retained for slaughter at about 31 months of age.Sire breeds ranked similarly for live weight at 13 months of age and for pre-slaughter weights at both 20 and 31 months of age. Relative to the Hereford-cross, the seven imported breeds were proportionally 0·054 to 0·072 heavier at slaughter (depending on slaughter age) and they had 0-065 to 0·077 heavier carcasses. Dressing proportions for the Blonde d'Aquitaine, Chianina and Limousin sire breeds were higher by at least 0007 units than for the Hereford-cross. The seven imported breeds were all leaner and had larger areas of m. longissimus than the Hereford-cross cattle. Friesian-crosses also had high live or carcass weights although they were intermediate for fat depth.The interaction of sire and dam breeds were only significant for fat depth (both slaughter ages) and for pre-slaughter and hot carcass weights (31-month slaughter age only). Interactions between sire breed and location were not important.Heritability estimates on data adjusted to a slaughter age of 595 days were: pre-slaughter weight 0·29, hot carcass weight 0·28, dressing proportion 0·14, fat depth 0·03 and m. longissimus area 0·30. Corresponding values on cattle whose records were adjusted to an age of 935 days were 0·56, 0·44, 0·39, 0·37 and 0·29. These values were from cattle grazed on pasture, and were generally lower than those from America (from cattle offered high energy rations). Phenotypic correlations among all pairs of traits were positive, whilst genetic correlations were positive for all pairs except those involving fat depth (where standard errors were large).

scholarly journals Performance, carcass characteristics, and centesimal composition of meat from Santa Inês lambs and Texel crossbred lambs (Santa Inês × Texel)

2019 ◽  
Vol 99 (2) ◽  
pp. 228-236
Author(s):  
Iolanda Aparecida Nunes ◽  
Ricardo Alessandro Martins Brito ◽  
Letícia Aparecida de Morais ◽  
Vanessa Souza Silva ◽  
Marco Antônio Pereira da Silva ◽  
...  
Keyword(s):  
Weight Gain ◽  
Average Daily Gain ◽  
Carcass Traits ◽  
Great Influence ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Feed Conversion ◽  
Significant Difference ◽  
Santa Inês ◽  
Daily Gain

This study evaluated the performance, carcass characteristics, and centesimal composition of the meat of intact and castrated lambs of the Santa Inês breed and of the crossbred animals: one-half Santa Inês × one-half Texel. Thirty-four lambs were used, nine intact and nine castrated males of the Santa Inês breed, and seven intact and nine castrated crossbred males, all aged between 6 and 7 mo and with an average live weight of 18.2 kg. The design was completely randomized in a 2 × 2 factorial (two crossing and two sexual conditions), with statistical analyses performed in the STAT version 9.4 program. There was a significant difference the Santa Inês and the Texel and Santa Inês crossbred animals in feed conversion and average daily gain, with superiority of the latter group. Castration of animals aged <12 mo had no significant effect on the performance and on the carcass traits of the Texel and Santa Inês crossbred animals, whereas the genotype had a great influence on weight gain and on subjective and quantitative carcass characteristics, demonstrating that crosses in sheep are needed to explore the complementarity of breeds, and heterosis is needed to achieve better performances and carcass characteristics.

A note on the response of wether lambs to treatment with trenbolone acetate combined with oestradiol-17β or zeranol

1981 ◽  
Vol 32 (3) ◽  
pp. 337-340 ◽  
Author(s):  
A. R. M. Yasin ◽  
H. Galbraith
Keyword(s):  
Weight Gain ◽  
Live Weight ◽  
Carcass Weight ◽  
Leg Length ◽  
Kidney Weight ◽  
Plasma Urea ◽  
Trenbolone Acetate ◽  
Mesenteric Fat ◽  
Kidney Fat ◽  
Hormonal Treatments

ABSTRACTTwenty-five Greyface wether lambs were allocated at approximately 40 kg live weight to be slaughtered, to be untreated controls, or to be implanted with 57·5 mg trenbolone acetate plus 8·1 mg oestradiol-17β (treatment To8), 60mg trenbolone acetate plus lOmg oestradiol-17β (treatment To10) or 70mg trenbolone acetate plus 12 mg zeranol (treatment TZ). The control and treated lambs were slaughtered after 63 days. Effects on live-weight gain were small and not significant. On average, hormonal treatments resulted in: (a) significant increases in dressing percentage, gain in carcass weight and carcass protein, kidney weight (g/kg live weight), depth of thorax and in the activity of liver tyrosine amino transferase; and (b) variable reductions in hind leg length, concentration of plasma urea and (g/kg live weight) kidney fat, mesenteric fat and fleece. Significant differences recorded between treatments included the conversion of food into carcass protein (treatments To8 and TO10 v. TZ) and mesenteric fat (g/kg live weight) and fat cover at the 12th rib (treatment To8v To10).

scholarly journals Effect of Genotype and Slaughter Age on Carcass Traits and Meat Quality of the Celta Pig Breed in Extensive System

2016 ◽  
Vol 16 (1) ◽  
pp. 259-273 ◽  
Author(s):  
Daniel Franco ◽  
Javier Carballo ◽  
Roberto Bermñudez ◽  
José M. Lorenzo
Keyword(s):  
Meat Quality ◽  
Profile Analysis ◽  
Carcass Traits ◽  
Live Weight ◽  
The Other ◽  
Carcass Weight ◽  
Texture Parameters ◽  
Slaughter Age ◽  
Colour Parameters

Abstract The objective of this study was to investigate the effects of genotype and slaughter age on carcass traits and meat quality of the Celta pig breed. Samples from 95 pigs of three lines (Barcina, Santiaguesa and Carballina) slaughtered at two different ages (12 and 16 months) were analysed. Pigs’ slaughter at 16 months showed significantly (P<0.001) higher live weight (157.2 vs. 178.9 kg), cold carcass weight (122.9 vs. 141.9 kg) and killing out percentage (77.7 vs. 79.5%; P<0.001) compared to those slaughtered at 12 months. Genotype also affected the live weight and cold carcass weight, both of which were highest in the Santiaguesa line. Changes in meat quality in relation to slaughter age and genotype were observed. The fat content increased with slaughter age, but did not vary with genotype. Regarding colour parameters, the L* values (48.53) were lower and a* values (11.55) were higher in samples of the Barcina line, indicating that the meat was darker and redder than in the other two lines. Both slaughter age and genotype had significant effects on texture parameters measured by the Warner Bratzler test, whereas textural profile analysis revealed significant differences mainly due to genotype.

scholarly journals Feed and production efficiency of young crossbred beef cattle stratified on a terminal total merit index1

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
David N Kelly ◽  
Stephen B Conroy ◽  
Craig P Murphy ◽  
Roy D Sleator ◽  
Donagh P Berry
Keyword(s):  
Beef Cattle ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Production Efficiency ◽  
Carcass Traits ◽  
Live Weight ◽  
Carcass Weight ◽  
Genetic Merit ◽  
Validation Population ◽  
Carcass Conformation

Abstract Few studies have attempted to quantify the association between a terminal total merit index with phenotypic feed and production efficiency in beef cattle, particularly when feed efficiency is itself explicitly absent as a goal trait in the index. The objective of the present study was to quantify the differences in phenotypic performance for feed intake, feed efficiency, and carcass traits of crossbred bulls, steers, and heifers differing in a terminal total merit index. A validation population of 614 bulls, steers, and heifers that were evaluated for feed intake and efficiency in the same feedlot and subsequently slaughtered at the end of their test period was constructed. The Irish national genetic evaluations for a terminal index of calving performance, docility, feed intake, and carcass traits were undertaken with the phenotypic records of animals present in the validation population masked. The validation population animals were subsequently stratified into four groups, within sex, according to their terminal index value. Mixed models were used to quantify the association between terminal genetic merit and phenotypic performance; whether the associations differed by sex were also investigated. The regression coefficient of phenotypic feed intake, carcass weight, carcass conformation, or carcass fat on its respective estimated breeding values was 0.86 kg dry matter 0.91 kg, 1.01 units, and 1.29 units, respectively, which are close to the expectation of one. On average, cattle in the very high terminal index stratum had a 0.63 kg DM/d lower feed intake, a 25.05 kg heavier carcass, a 1.82 unit better carcass conformation (scale 1 to 15), and a 1.24 unit less carcass fat score (scale 1 to 15), relative to cattle in the very low terminal index stratum. Cattle of superior total genetic merit were also more feed efficient (i.e., had a lower energy conversion ratio, lower residual feed intake, and greater residual gain), had a greater proportion of their live-weight as carcass weight (i.e., better dressing percentage) and were slaughtered at a younger age relative to their inferior total genetic merit counterparts. This study provides validation of an all-encompassing total merit index and demonstrates the benefits of selection on a total merit index for feed and production efficiency, which should impart confidence among stakeholders in the contribution of genetic selection to simultaneous improvements in individual animal performance and efficiency.

scholarly journals In vivo prediction of live weight and carcass traits using body measurements in indigenous guinea fowl

2012 ◽  
Vol 28 (1) ◽  
pp. 137-146
Author(s):  
D.M. Ogah
Keyword(s):  
Body Weight ◽  
Carcass Traits ◽  
Live Weight ◽  
Guinea Fowl ◽  
Chest Circumference ◽  
Carcass Weight ◽  
Meat Production ◽  
Body Measurements ◽  
Weight Prediction ◽  
Breast Weight

The objectives of this study were to evaluate the relationship between live measurements and carcass traits, and develop linear regression models to predict live weight and set of carcass traits in an indigenous guinea fowl. Twenty eight adult indigenous birds of both sexes were used for the study. Live weight and body measurements were obtained before slaughter while carcass traits were taken on hot carcass. Result obtained from descriptive statistics showed that, mean performance were 1208?6.86g, 22.17?0.13 cm, 8.94?0.07cm, 2.96?0.03cm, 34.23?0.19cm, 850.15?7.18g, 267.23?1.69g, 72.39?0.64g and 70.38% for body weight, body length, thigh length, keel length, chest circumference, carcass weight, breast weight, thigh weight and dressing percentage. All the traits except for keel length were positively (P<0.001) correlated to body weight. Chest circumference had the highest predictive power in live weight estimate (R2.558), while body weight stand out as the single most important variable in carcass weight and breast weight prediction (R2.820 and .902) This suggest that carcass weight and breast weight prediction can best be obtained using body weight, providing direction in developing model for selection and improvement of guinea fowl for meat production.

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