scholarly journals  Growth performance, carcass traits and meat quality of bulls and heifers slaughtered at different ages

2012 ◽  
Vol 57 (No. 1) ◽  
pp. 34-43 ◽  
Author(s):  
D. Bureš ◽  
L. Bartoň
Keyword(s):  
Meat Quality ◽  
Dry Matter ◽  
Conversion Ratio ◽  
Carcass Composition ◽  
Feed Conversion ◽  
Sensory Panel ◽  
Longissimus Lumborum ◽  
Slaughter Age ◽  
Total Meat

The effects of sex and slaughter age on growth, feed intake, carcass composition and meat quality attributes of musculus longissimus lumborum were investigated in Charolais × Simmental bulls (n = 12) and heifers (n = 12) reared and finished under identical management conditions. The animals entered the experiment at similar age (251 days) and were slaughtered at 14 or 18 months of age. Bulls gained more rapidly (P  < 0.001), consumed more dry matter daily (P < 0.05), and had a higher killing-out proportion (P < 0.05). The sex × slaughter age interaction was significant (P < 0.01) for feed conversion ratio, which deteriorated markedly more in heifers than in bulls as slaughter age increased. Bulls produced leaner carcasses with a higher proportion of total meat (P < 0.001). While bulls contributed to high-priced meat by a higher proportion of meat from the shoulder (P < 0.01), heifers had higher proportions of meat from the rump and loin (P < 0.05). Older animals were generally fatter and their carcasses contained lower proportions of high-priced meat (P < 0.01) and bones (P < 0.05). Bulls exhibited lower contents of dry matter (P < 0.001), protein (P < 0.05) and intramuscular fat (P < 0.001), and a higher content of collagen (P < 0.001) in musculus longissimus lumborum than hei-fers. The meat from heifers was assessed by the sensory panel as more tender and, when aged for 11 days, more acceptable than the meat from bulls. Older animals obtained higher scores for beef flavour intensity (P < 0.01), tenderness (P < 0.001), juiciness (P < 0.05), and overall acceptance (P < 0.001).  

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.

Effect of hypothyroidism on growth performance, carcass composition and meat quality of fat-tailed Lori-Bakhtiari lambs

2015 ◽  
Vol 55 (10) ◽  
pp. 1324 ◽  
Author(s):  
Yousef Baghcheghi ◽  
Ahmad Zare Shahneh ◽  
Mahdi Ganjkhanlou ◽  
Mahdi Khodaei Motlagh ◽  
Ali Reza Yousefi
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Conversion Efficiency ◽  
Shear Force ◽  
Carcass Composition ◽  
Feed Conversion ◽  
Feed Conversion Efficiency ◽  
Mild Hypothyroidism ◽  
Plasma Triiodothyronine

The aim of the present study was to investigate the effects of induction hypothyroidism by propylthiouracil (PTU) on the growth performance and meat quality of fat-tailed Lori-Bakhtiari lambs. Eighteen Lori-Bakhtiari male lambs were randomly assigned to one of three groups (n = 6) and received daily treatments (gavage) consisting of 0 (Control: C), 10 (Low: L) or 20 (High: H) mg PTU/kg bodyweight/day for 60 days. PTU decreased plasma triiodothyronine and thyroxine concentration in both L and H (P < 0.0001). Lambs treated with PTU (L and H) had lower feed intake (P < 0.004), feed conversion efficiency (P < 0.003), and greater intramuscular fat than C lambs (P < 0.035). Meat from the L and H lambs had lower cooking loss and shear force, and also higher L* (lightness) than C lambs (P < 0.004, P < 0.015 and P < 0.025, respectively). The meat of H and L lambs was more tender than C lambs (P < 0.032). However, the meat of H lambs required fewer chews before swallowing than C lambs (P < 0.041). Generally, induction of mild hypothyroidism appeared to improve feed conversion efficiency and meat quality of lambs.

scholarly journals Comparison of growth performance and slaughter characteristics of Limousin and Charolais heifers

2010 ◽  
Vol 53 (5) ◽  
pp. 520-528 ◽  
Author(s):  
R. Zahrádková ◽  
L. Bartoň ◽  
D. Bureš ◽  
V. Teslík ◽  
V. Kudrna
Keyword(s):  
Growth Performance ◽  
Live Weight ◽  
Conversion Ratio ◽  
Carcass Composition ◽  
Feed Conversion Ratio ◽  
Average Weight ◽  
Production Traits ◽  
Feed Conversion ◽  
Slaughter Weight ◽  
Longissimus Lumborum

Abstract. The objective of this study was to determine the effects of breed and a diet containing linseed on the growth and carcass composition characteristics of heifers. A total of 48 Limousin (LI) and Charolais (CH) heifers with an average weight of 270 kg were assigned to two diets containing either extruded linseed (LIN) or no supplemental oilseed (CON). The target slaughter weight was set at 500 kg. The diet had no effect on any of the observed production traits. The CH heifers had higher live weight gains (P<0.001) and a lower feed conversion ratio (P<0.001). The LI heifers had a higher dressing percentage (P<0.001), higher meat to bone ratio (P<0.001), greater m. longissimus lumborum et thoracis area (P<0.05), and produced more internal and carcass fat (P<0.05). It was concluded that purebred LI heifers grew less rapidly and less efficiently but produced heavier carcasses with a more favourable meat to bone ratio compared to purebred CH heifers.

scholarly journals Effects of guavira fruit (Campomanesia adamantium) peel extract on performance and meat quality of broilers

2021 ◽  
Vol 51 (1) ◽  
Author(s):  
M.L. Lohmann ◽  
C. Eyng ◽  
R.V. Nunes ◽  
E.J.S. Argandona ◽  
C.A.C. Correia ◽  
...  
Keyword(s):  
Meat Quality ◽  
Conversion Ratio ◽  
Feed Conversion ◽  
Fruit Peel ◽  
Carcass Yield ◽  
Quadratic Effect ◽  
Hydroethanolic Extract ◽  
Water Holding ◽  
Peel Extract

This article assessed the performance, carcass yield, and meat quality of finishing broilers fed increasing levels of hydroethanolic extract of guavira fruit peel (HEGP) were assessed. A total of 480, three-weeks-old male broilers were randomly allocated to dietary levels of HEGP (0, 100, 200, 300, 400, and 500 mg/kg), with five replicates and 16 birds each. There was a quadratic effect of HEGP inclusion on weight gain (WG) and feed conversion ratio (FCR), with the greatest WG and FCR being calculated at levels of 314 and 219 mg/kg HEGP, respectively. Broilers fed diets containing the extract had better performance than those fed an extract-free diet. There was no effect of extract inclusion on carcass yield and cuts. There was a quadratic effect of HEGP inclusion on a* (redness) of thigh meat at 15 min post-mortem, and on water-holding capacity (WHC), with the lowest and highest values being calculated at 270 mg/kg and 263 mg/kg HEGP, respectively. There was a quadratic influence of HEGP inclusion on the malonaldehyde content at 30-day storage, with highest value being calculated at 218 mg/kg HEGP. Dietary inclusion of 219 mg/kg of HEGP resulted in better FCR for broilers in the finishing phase but without improvement in meat quality.

scholarly journals Performance and meat quality of Nordic Red and Aberdeen Angus bulls offered faba bean or field pea based whole crop legume-cereal silages

2016 ◽  
Vol 25 (1) ◽  
Author(s):  
Arto Kalevi Huuskonen ◽  
Maiju Pesonen ◽  
Markku Honkavaara
Keyword(s):  
Meat Quality ◽  
Faba Bean ◽  
Dry Matter ◽  
Carcass Characteristics ◽  
Field Pea ◽  
Feed Conversion ◽  
Grass Silage ◽  
Conversion Rates ◽  
Ad Libitum

The objective of this study was to determine the effects of silage plant species (faba bean and field pea based whole crop legume-cereals vs. grass) on performance and meat quality of growing Aberdeen Angus (AA) and Nordic Red (NR) bulls. A 2×3 factorial design was used. The experiment comprised 30 AA and 30 NR bulls. Both breeds were randomly allotted to the three feeding treatments. The compositions (g kg-1 dry matter) of diets were: 1) grass silage (650) plus rolled barley (350), 2) faba bean-wheat silage (650) plus rolled barley (350) and 3) pea-wheat silage (650) plus rolled barley (350). The experimental diets were offered as total mixed rations ad libitum. The AA bulls grew faster, had better feed conversion rates and superior dressing proportion and carcass conformation compared to the NR bulls. Replacing grass silage by whole crop legume-cereal silages in the diet did not have remarkable effects on animal performance, carcass characteristics or meat quality.

Growth paths for suckler bulls slaughtered at 19 months of age: a meat quality perspective

2017 ◽  
Vol 8 (s1) ◽  
pp. s60-s63
Author(s):  
L. Moran ◽  
M. G. O’Sullivan ◽  
J. P. Kerry ◽  
M. McGee ◽  
K. McMenamin ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Sensory Panel ◽  
Concentrate Supplementation ◽  
Grass Silage ◽  
Main Variable ◽  
Instrumental Texture

This experiment aimed to assess the effect of different indoor winter growth rates (WGR) followed by different concentrate supplementation levels at pasture on meat quality of 90 bulls. During the first winter, bulls were offered grass silage ad libitum and either 3 kg (WGR3) or 6 kg (WGR6) of concentrates. After turn-out to pasture, bulls were offered: grass without supplementation (PO), grass plus 0.2 predicted dry matter intake (DMI) as concentrates (PL) or grass plus 0.4 predicted DMI as concentrates (PH). After finishing, colour, chemical composition (unaged), instrumental texture and sensory characteristics (14 days of ageing) of longissimus thoracis were measured. WGR6 bulls had heavier carcasses than WGR3 bulls. There was an interaction between WGR and supplementation for instrumental texture and redness (a). Within WGR3, PO beef was the most tender, whereas within WRG6, PL was the most tender. However, these differences were not detected by the sensory panel. Within WGR3, redness was the lowest for PL, whereas within WRG6, PO was the least red. No differences were found for chemical composition. The multivariate analysis highlighted WGR as the main variable affecting meat quality characteristics. In conclusion, variations in growth path exerted minor effects on appearance and instrumental texture which did not affect the perception of bull beef by a trained sensory panel.

scholarly journals Productive Performance and Egg and Meat Quality of Two Indigenous Poultry Breeds in Vietnam, Ho and Dong Tao, Fed on Commercial Feed

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 408 ◽  
Author(s):  
Duy Nguyen Van ◽  
Nassim Moula ◽  
Evelyne Moyse ◽  
Luc Do Duc ◽  
Ton Vu Dinh ◽  
...  
Keyword(s):  
Meat Quality ◽  
Egg Quality ◽  
Growth Patterns ◽  
Carcass Composition ◽  
Egg Laying ◽  
Production Performance ◽  
Meat Production ◽  
Feed Conversion ◽  
Commercial Diet

The objective of this work was the evaluation of the meat production and laying performances, and the meat and egg quality of two breeds of Vietnamese broiler chickens, Ho and Dong Tao, fed on a commercial diet. In a survey, we continuously recorded for 28 weeks, the data on the production performance and meat quality of 250 chicks from each breed. We investigated egg laying and egg quality using 36 Ho and 32 Dong Tao hens during 52 weeks of laying. The growth patterns were similar for the two breeds. Feed conversion ratios were also similar, and demonstrated the low efficiency of these two breeds when compared to commercial broilers. Slaughter age proved to affect several carcass yield characteristics, showing that slaughtering between 16 and 20 weeks might be better than at the usual age of 28 weeks. Yield, carcass composition and meat quality differed between the two studied breeds. The eggs production and number of embryonated eggs were low for the two breeds when compared to other breeds, with a lower hatching performance in Ho than in Dong Tao. In summary, the production performances of Ho and Dong Tao chickens were low, even when birds were fed a commercial diet. The study demonstrates the need to find ways to improve the production and reproduction performances of these animals, in order to contribute to the program of conservation and exploitation of these two breeds.

scholarly journals Ducks’ Growth, Meat Quality, Bone Strength, and Jejunum Strength Depend on Zeolite in Feed and Long-Term Factors

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1015
Author(s):  
Jakub Biesek ◽  
Mirosław Banaszak ◽  
Marek Adamski
Keyword(s):  
Body Weight ◽  
Meat Quality ◽  
Body Weight Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Water Holding Capacity ◽  
Feed Conversion ◽  
Water Holding

The safety of production and the high quality of meat are important aspects of rearing poultry, especially when natural solutions are used. Because of the increasing popularity of duck meat, the aim of the present study was to assess the effect of a diet with an inclusion of zeolite on the growth performance, meat quality, and strength of the bones and jejunum in ducks of different origin, sex, and age at slaughter. The study was conducted on 320 Orvia and Cherry Valley ducks. Birds were allocated to eight groups, according to their sex and origin. Half of the birds received feed with a 4% inclusion of zeolite. Body weight gain, feed intake, and feed conversion ratio per kilogram of gain were calculated. After six or seven weeks, five birds from each group were selected and slaughtered. After dissection, meat quality (pH, water-holding capacity, colour) and the strength of the bones and gut were analysed. The analysis revealed that zeolite was associated with reduced body weight gains and increased feed conversion ratio, but with a higher water-holding capacity of breast muscles in seven-week-old ducks, and with a higher yellowness and water-holding capacity of leg muscles in six-week-old ducks. A positive effect of long-term factors (age, sex, origin) and the interaction with zeolite was found for most of the analysed traits. Findings on the effect of 4% inclusion of zeolite in duck diet were inconclusive. The study implies the need for further research, since zeolite has potential as a natural sanitizing agent and can improve the quality of produced duck meat.

scholarly journals Effect of chronological age and sex on tenderness and juiciness of beef from cattle raised in Puerto Rico

2021 ◽  
Vol 101 (1) ◽  
pp. 35-49
Author(s):  
Katherine Domenech ◽  
Aixa Rivera ◽  
Américo Casas ◽  
Melvin Pagán ◽  
Danilo Cianzio ◽  
...  
Keyword(s):  
Meat Quality ◽  
Lower Proportion ◽  
Chronological Age ◽  
Sensory Panel ◽  
General Acceptance ◽  
Longissimus Lumborum ◽  
Water Holding ◽  
Ph Variations ◽  
Age And Sex

Effects of chronological age (0, 2, 4, 6, and 8 permanent Incisors [PI]) and sex were evaluated on meat quality of the Longissimus lumborum muscle using 130 beef-type animals. Hot carcass weight (HCW), intramuscular fat (IF), pH, tenderness (WBS), color (L*, a*, and b*), water holding capacity and sensory properties (tenderness, juiciness, and general acceptance) were evaluated. Females had lower HCW (178 vs. 252 kg; P<0.0001), greater IF (6.48 vs. 3.87%; P<0.0001), and higher pH (5.74 vs. 5.59; P=0.0179). As age increased, IF decreased in males, while the opposite occurred in females (P=0.0153). Younger animals had lighter, redder, and yellower meat (greater L*, a* and b*, respectively; P<0.05). Higher pH resulted in lower L*, a* and b* values (P<0.05) and a lower proportion of water liberated evident by a negative correlation of -0.57 (P<0.0001). Females had more tender meat (8.06 vs. 9.08 kg; P<0.05). An interaction between sex and age (P=0.0011) resulted from females with 6 and 8 PI and males with 8 PI having lower WBS. Although unexpected, these results could have been influenced by greater pH and IF within these age categories. The sensory panel found no differences in any of the attributes tested (P>0.05). To better understand how age and sex affect meat quality, pH variations must be addressed.

scholarly journals Effect of Fresh Citrus Pulp Supplementation on Animal Performance and Meat Quality of Feedlot Steers

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3338
Author(s):  
Santiago Luzardo ◽  
Georgget Banchero ◽  
Virginia Ferrari ◽  
Facundo Ibáñez ◽  
Gonzalo Roig ◽  
...  
Keyword(s):  
Meat Quality ◽  
Block Design ◽  
Average Daily Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Animal Performance ◽  
Feed Conversion ◽  
Feedlot Steers ◽  
Citrus Pulp

The use of fruit by-products such as citrus pulp represents a feeding ingredient that deserves to be evaluated as an energy source in animal rations. Thirty-six British breed steers were allotted to one of the three feeding treatments (12 steers/treatment): 0%, 15% and 30% of fresh citrus pulp inclusion in the ration in a randomized complete block design to evaluate animal performance and carcass and meat quality traits. In the present study, the inclusion of fresh citrus pulp up to 30% of the diet did not affect the animal average daily gain (p > 0.05) but steers that were fed the pulp consumed less feed (p < 0.05) and presented a lower feed conversion ratio (p < 0.05) than their counterparts without citrus pulp in their diet. No effect of fresh citrus pulp was observed on carcass and meat quality (p > 0.05). A greater lipophilic antioxidant capacity (p < 0.05) in meat was observed when fresh citrus pulp was offered at 15% of the diet. Fresh citrus pulp used up to 30% as a feed ingredient in feedlot rations does not negatively affect animal performance or meat quality but, rather, has a positive effect on dry matter intake and a better feed conversion ratio.

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