Sustained growth promotion, carcass characteristics, and meat quality of steers treated with oestradiol-17b

2000 ◽  
Vol 51 (1) ◽  
pp. 133 ◽  
Author(s):  
R. A. Hunter ◽  
T. Magner ◽  
P. G. Allingham
Keyword(s):  
Meat Quality ◽  
Growth Promotion ◽  
Animal Health ◽  
Bos Indicus ◽  
Carcass Characteristics ◽  
Experimental Period ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Tropical Pastures

The experiment measured the effect of 2 hormonal growth promotion strategies on growth rate, carcass characteristics, and some objective measurements of meat quality of steers. Bos indicus × Bos taurus crossbred steers grazing improved tropical pastures were divided into 3 treatment groups: unimplanted controls, implantation once with a long-acting formulation containing 45 mg oestradiol-17β (Compudose 400, Elanco Animal Health, West Ryde, NSW), implantation every 105 days with a shorter acting formulation containing 20 mg oestradiol-17β (Compudose 100) (4 implantations). Over a 420-day experimental period, steers implanted several times with oestradiol gained significantly (P < 0.001) more weight (279 kg) than those implanted once (251 kg) and the controls (230 kg). Respective carcass weights were 270, 255, and 244 kg. At the same carcass weight, oestradiol treatment had no significant effect on beef yield or carcass fatness. Increased total beef yields from implanted steers were associated with increased carcass weight, rather than significant modification of carcass composition. Treatment had no significant effect on any of the objective measures of meat quality studied, including ultimate pH, peak force, compression, and adhesion.

An evaluation of beef carcass quality 2. Influence of variation in grazing intensity and the level of barley supplementation with silage on the carcass and meat quality of Friesian steers

1972 ◽  
Vol 15 (3) ◽  
pp. 229-237
Author(s):  
C. E. Hinks ◽  
J. H. D. Prescott
Keyword(s):  
Meat Quality ◽  
Compensatory Growth ◽  
Live Weight ◽  
Grazing Intensity ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Eating Quality ◽  
Winter Period ◽  
Carcass Quality

SUMMARYTwo experiments concerning the effects, on the carcass and meat characteristics of 18-months-old Friesian steers, of variation in grazing intensity and the level of barley feeding with silage are reported.Groups of 12 steers were grazed at different intensities over 5-month grazing periods, such that live-weight differences of 38 kg and 16 kg were recorded at housing. No compensatory growth was recorded during the subsequent winter feeding period.Whilst the grazing treatments had little effect on carcass or meat quality, higher levels of barley feeding with silage over the winter period (710 v. 410 kg/steer) had significant effects on live-weight gain, and increased carcass weight by 21 kg at slaughter. The higher yield of carcass weight was reflected in significant differences in carcass composition, joint proportions and retail cut-out value. Sixty per cent of the carcass weight difference was removed as trim fat. Differences in carcass fatness were not associated with any differences in eating quality.

scholarly journals Sustained growth promotion, carcass and meat quality of steers slaughtered at three liveweights

2001 ◽  
Vol 41 (7) ◽  
pp. 1033 ◽  
Author(s):  
R. A. Hunter ◽  
H. M. Burrow ◽  
G. J. McCrabb
Keyword(s):  
Growth Rate ◽  
Meat Quality ◽  
Growth Promotion ◽  
Domestic Market ◽  
Carcass Composition ◽  
Eating Quality ◽  
Japanese Market ◽  
Sustained Growth ◽  
Feedlot Steers

The experiment measured the effect of a sustained growth promotion strategy on growth rate, carcass characteristics, and meat quality of Brahman and F 1 Brahman crossbred steers. Meat quality was assessed objectively by laboratory measurement and a subset of samples evaluated subjectively by consumer taste panels. Steers were allocated to one of 12 treatment groups; 2 implant strategies × 3 liveweights at slaughter × 2 nutritional finishing strategies. The 2 implant strategies were unimplanted controls and implantation with 20 mg oestradiol-17β (Compudose) every 100 days. The target carcass weights at slaughter were about 220 kg (Australian domestic market), about 280 kg (Korean market) and about 320 kg (Japanese market). Steers were finished either at pasture or on a grain-based diet in a feedlot. For every treatment group except where steers were finished in a feedlot for the domestic market, the implant strategy resulted in significantly (P<0.01) heavier final liveweights, significantly (P<0.01) greater cumulative liveweight gains and significantly (P<0.05) heavier carcass weights. The magnitudes of the significant liveweight responses ranged from 30 kg for pasture fed steers for the domestic market to 47 kg for pasture fed steers for the heavier weight Japanese market. Repeated treatment with oestradiol-17β had no significant effect on carcass composition as determined by indices of carcass lean and carcass fat. The additional yield of retail beef from implanted steers was principally associated with increased carcass weight. The magnitude of the increase in beef yield was 8 kg (n.s.) for domestic, feedlot steers; 15 kg (P<0.01) for Korean, feedlot steers and 18 kg (P<0.001) for Japanese, feedlot steers. In steers finished in the feedlot for the Korean and Japanese markets, sustained growth promotion was associated with a significant (P<0.01) decrease in meat tenderness as measured by peak force. In contrast there was no such effect in other groups measured (domestic market, feedlot finished and Japanese market, pasture finished). Consumer assessment of eating quality was conducted on steaks from steers, finished in a feedlot for the Korean and Japanese markets. At both slaughter weights there was no significant effect of treatment on tenderness, juiciness, flavour, overall acceptability or meat quality score which combined tenderness, juiciness, flavour and overall quality. However, mean preference scores from implanted steers were consistently lower than those from control steers. It was concluded that the aggressive implant strategy resulted in substantial increases in weight gain that were more pronounced during periods of moderate growth rate relative to periods of very low rates of gain. During periods of low weight gains or weight stasis there was little advantage from implantation. Carcass composition was not significantly modified by treatment with oestradiol. The effect of the aggressive implantation strategy on eating quality of the beef was equivocal and further investigation is certainly warranted.

scholarly journals Effects of different energy source diets, as corn substitutes, on carcass characteristics and meat quality of feedlot lambs

2021 ◽  
Vol 53 (2) ◽  
pp. 243-251
Author(s):  
Leticia Jalloul Guimarães ◽  
Isabella Guartieri da Silva ◽  
Ana Claudia Ambiel ◽  
Fabiola Cristine de Almeida Rego ◽  
Caliê Castilho ◽  
...  
Keyword(s):  
Meat Quality ◽  
Rice Bran ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Carcass Weight ◽  
Soybean Hulls ◽  
Citrus Pulp ◽  
Ram Lambs ◽  
Dietary Treatments

This study evaluated the effects of different energy sources, as corn substitutes, on the carcass characteristics and meat quality of lambs. Twenty-four intact ram lambs were identified, weighed, and assigned to one of four dietary treatments: corn, citrus pulp, rice bran, and soybean hulls. The ram lambs were confined in feedlots, and when they reached 30 kg of live weight, they were slaughtered. A  completelyrandomized design with different replicates was used for the analysis, along with the Tukey-5% test. For hot and cold carcass weight, rice bran produced lower values than the other dietary treatments. For the red color content of the meat, citrus pulp presented superior values when compared to corn, whereas meat and fat color, loin eye area, and objective tenderness did not differ between treatments. Different energetic sources used to replace corn in ram lambs finishing diets did not affect the proximate composition and quality of the meat. Highlights:  • Addition of rice bran to the lambs' diet resulted in lower hot and cold carcass weight.• Animals fed soybean hulls presented the highest carcass compactness index values.• Rice bran extended the feedlot period of lambs in 59.33 days, been longer than the others energies sources.• Corn, rice bran, citrus pulp and soybean hulls did not change the quality of meat but the inclusion of rice bran should be carefully evaluated.

Continued studies on the effect of grain or pasture on the carcass composition and meat quality of Friesian steers

1977 ◽  
Vol 28 (4) ◽  
pp. 755 ◽  
Author(s):  
HL Davies
Keyword(s):  
Growth Rate ◽  
Meat Quality ◽  
White Clover ◽  
High Energy ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Restricted Group ◽  
Ad Libitum ◽  
Dressing Percentage

Twenty-one Friesian steers were grown to a final fasted liveweight of 469 kg. Seven of the steers grazed irrigated ryegrass-white clover pastures, seven steers were fed on a high energy ration ad libitum, and seven were given a ration of the same composition as the second group but at a restricted amount such that the growth rate was similar to that of the grazing steers. There were no significant differences in carcass weight between the three groups. The dressing percentage of the grain ad libitum group was 58%, the restricted grain group 57% and the pasture group 55%. The dressing percentage was significantly lower (P < 0.05) in the pasture group. The grain ad libitum group had 51.5% more (P < 0.05) oaental fat than the pasture group, and the restricted group 28.9% more (P < 0.05) than the pasture group. In dissections of the 9th, 10th and 11th ribs the grain ad lib. group had 35.4% fat, the restricted grain group 32.8% and the pasture group 26.5%, the proportion of fat being significantly (P < 0.05) lower in the pasture group than in the grain ad lib. group. No significant differences were found in either tenderness, juiciness or flavour between the three groups.

scholarly journals Effects of Supplementing Crude Glycerin in Concentrated Diet and Castration on Carcass Characteristics and Meat Quality of Thai Native x Anglo Nubian Goats

2017 ◽  
Vol 16 (7) ◽  
pp. 477-486
Author(s):  
Anneke ANNEKE ◽  
Chaiyawan WATTANACHANT ◽  
Saowakon WATTANACHANT
Keyword(s):  
Meat Quality ◽  
Control Diet ◽  
Live Weight ◽  
Carcass Composition ◽  
Carcass Weight ◽  
Crude Glycerin ◽  
Fat Percentage ◽  
Intact Male ◽  
Randomized Design

The effects of feeding concentrate diet containing crude glycerin supplementation and castration on carcass composition and meat quality of Thai Native x Anglo-Nubian (TN-AN) goats were investigated. Twenty TN-AN goats at the age of 12 months old with 24.75±1.33 kg initial live weight were allotted into a 2x2 factorial arrangement in completely randomized design when factor A was assigned for sexes (intact and castrated male) and factor B was assigned for 2 types of concentrate diet (control diet and diet supplemented with 10 % crude glycerin). Goats were intensively raised in individual pens with ad libitum water and Atratum grass (Paspalum atratum), while 2 % of concentrate diets was provided. After 90 days of feeding, 3 goats from each treatment combination were randomly sampled and sacrificed for further examination. From the study, castrated male goats had significantly higher slaughter and carcass weight, carcass fat percentage and chemical fat percentage than those of the intact males (P < 0.01). In addition, muscle from castrated male goats was more tender and lighter in color as compared with intact male goats (P < 0.01). Goats receiving a diet with extra glycerin had significantly higher weight at slaughter, warm carcass weight, carcass fat, and chemical fat percentages than those on the control diet. Therefore, it could be concluded that feeding goats with a diet of 10 % supplementary glycerin and castration could lead to better slaughter and warm weight, whereas a higher fat content in the carcass and muscle are observed.

scholarly journals Effect of breed and diet on carcass parameters and meat quality of spent hens

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Márcio Vargas-Ramella ◽  
Mirian Pateiro ◽  
Diego Rois ◽  
Anisia Arias ◽  
José Ramón Justo ◽  
...  
Keyword(s):  
Meat Quality ◽  
Meat Products ◽  
Carcass Characteristics ◽  
Live Weight ◽  
Quality Parameters ◽  
Carcass Weight ◽  
Spent Hen ◽  
Laying Performance ◽  
Carcass Parameters

Abstract Two spent hen breeds (Mos and Isa Brown) fed with three different diets [commercial feeding (CF); corn, pea, and triticale (CPT); and corn and wheat (CW)] were studied to assess their laying performance, carcass characteristics, and meat quality parameters (breast and drumstick). A total of 48 hens reared in a traditional free-range system were used. Birds were slaughtered at 72 weeks of age after the moulting in an accredited abattoir, and measurements (for each bird) of carcass and meat started at 24h post-mortem. The results demonstrated a breed and diet effect (P < 0.05) on laying performance, carcass, and meat quality. The Mos breed showed lower laying performance, higher live weight (P < 0.001), carcass weight (P < 0.001), dressing percentage (P < 0.001), and carcass fat (P < 0.001) than Isa Brown. The breed also affected physicochemical parameters of drumstick and breast (P < 0.05). Concerning the diet effect, spent hens fed with commercial feeding shown heavier live weight (P <0.01) and carcass weight (P <0.01). Diet significantly affected most of meat quality parameters, being CPT the formulation that most affected (P < 0.05) drumstick composition, while in the breast was CF (P <0.001). Significant (P ≤ 0.005) effect in breast colour, cooking loss and hardness were observed in animals fed with alternative diets to CF. Regarding nutritional quality, no breed or diet effect (P < 0.05) was observed in MUFAs, PUFAs and n-6 contents of meat. Overall, both breeds showed a high protein and low-fat content in the breast, showing these hens as an opportunity for the development of meat products as well as an economic purpose for spent hens that reach the end of their productive lives.

scholarly journals Effect of feeding different forage and concentrate levels on carcass characteristics and meat quality of Aceh cattle

2019 ◽  
Vol 387 ◽  
pp. 012080
Author(s):  
H Koesmara ◽  
I G S Budisatria ◽  
E Baliarti ◽  
T S M Widi ◽  
A Ibrahim ◽  
...  
Keyword(s):  
Meat Quality ◽  
Carcass Characteristics ◽  
Effect Of Feeding

scholarly journals Carcass Composition, Meat Quality and Sensory Quality of Gentile di Puglia Light Lambs: Effects of Dietary Supplementation with Oregano and Linseed

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 607
Author(s):  
Giuseppe Scarpa ◽  
Simona Tarricone ◽  
Marco Ragni
Keyword(s):  
Meat Quality ◽  
Control Diet ◽  
Saturated Fatty Acids ◽  
Total Content ◽  
Carcass Composition ◽  
Origanum Vulgare ◽  
Growth Performances ◽  
Longissimus Lumborum ◽  
Dietary Treatments

There is a growing demand by the modern consumer for meat containing less fat and lower levels of saturated fatty acids, which are considered to increase the risk of coronary heart disease. In southern Italy, the Gentile di Puglia breed is one of the most common on farms, and the light lambs are often consumed. The study evaluates the effect of a diet containing extruded linseed (Linum usitatissimum) on growth performances, carcass traits, and meat quality in Gentile di Puglia light lambs. Thirty-six male lambs are weaned at about 20 days of age, and divided into three groups—each group is either fed a control diet (C), a diet containing 3% extruded linseed (L), or a diet containing 3% extruded linseed and 0.6% oregano (Origanum vulgare) (L + O). The lambs’ growth performances and the slaughtering and dissection data did not differ between groups. Dietary treatments have no significant effect on the quality and chemical composition of Longissimus lumborum (Ll). The mount of linoleic acid in Ll meat is significantly higher in the L group, and this positively affected the total content of n-3 Polyunsaturated Fatty Acid, as well as the n-6/n-3 ratio. The good results obtained concerning the sensory traits meet the requirements of the market’s consumer.

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