Meat quality of rabbits reared with two different feeding strategies: with or without fresh alfalfa ad libitum

This study aimed at evaluating carcass traits and meat quality of Nellore steers on pasture submitted to different dietary supplementation strategies. The 32 Nellore animals tested (8 ± 0.6 months) were raised under rotational grazing on Brachiaria brizantha cv. Piatã (syn. Urochloa brizantha cv. Piatã) pasture and distributed in four treatments: supply of mineral salt ad libitum in the growth and finishing phases (MSGF); concentrate supplementation only during the growth phase (CG); concentrate supplementation only during the finishing phase (CF) and concentrate supplementation the growth and finishing phases (CGF). The concentrated supplement was supplied at 0.5% of body weight and mineral ad libitum. The steers were slaughtered when more than 50% of the lot of each treatment reached 450 kg body weight. The mean the hot and cold carcass weight and subcutaneous fat thickness did not differ between treatments (P > 0.05). The calves the treatment CF and CGF showed a larger rib-eye area and higher ether extract levels in the Longissimus dorsi muscle than in MSGF and CG (P < 0.05). Mean shearing force was similar between treatments (P > 0.05). The use of feeding strategies on pasture with concentrate supplementation in the growth and finishing phases of Nellore cattle anticipates slaughter in 92 days and produces carcasses and meat with satisfactory traits.

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The Effect of Feeding System on the Carcass Quality of Crossbred Lambs with Texel

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun202068010017 ◽

2020 ◽

Vol 68 (1) ◽

pp. 17-24

Author(s):

Angela Cividini ◽

Dušan Terčič ◽

Mojca Simčič

Keyword(s):

Growth Rate ◽

Meat Quality ◽

Carcass Quality ◽

Quality Traits ◽

Feeding System ◽

Ad Libitum ◽

Daily Gain ◽

Effect Of Feeding ◽

Carcass Cuts

The aim of this study was to estimate the effect of feeding system on the growth rate and carcass quality of crossbred Improved Jezersko-Solčava x Texel (JSRT) lambs and to evaluate the effect of sex on these traits. The trial was conducted in nature according to the traditional rearing systems. The trial included 44 crossbred lambs, which were born and reared until the slaughter in three different flocks. In the age of 10 days suckled lambs were offered with ad libitum corresponding diets according to the feeding system. All lambs were slaughtered in seven consecutive days by the same procedure. The effect of feeding system significantly affected daily gain from birth to slaughter, EUROP carcass conformation and shoulder width. Likewise, the effect of sex significantly affected daily gain from birth to slaughter and internal fatness of carcasses. According to carcass cuts the feeding system significantly affected only the proportion of neck and leg. Considering meat quality traits, feeding system had a significant effect on the pH 45 and CIE a* values. In this study, we could speculate that more than the feeding system the growth and the carcass traits as well as meat traits were affected by the amount of the supplement.

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Effect of alfalfa hay on growth performance, carcass characteristics, and meat quality of growing lambs with ad libitum access to total mixed rations

Revista Brasileira de Zootecnia ◽

10.1590/s1806-92902016000600004 ◽

2016 ◽

Vol 45 (6) ◽

pp. 302-308 ◽

Cited By ~ 7

Author(s):

Ibrahim A. Alhidary ◽

Mutassim M. Abdelrahman ◽

Abdullah H. Alyemni ◽

Rifat Ullah Khan ◽

Mohamed Y. Al-Saiady ◽

...

Keyword(s):

Growth Performance ◽

Meat Quality ◽

Carcass Characteristics ◽

Alfalfa Hay ◽

Ad Libitum

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Feed efficiency and meat quality of crossbred beef heifers classified according to residual feed intake

Revista Brasileira de Saúde e Produção Animal ◽

10.1590/s1519-99402015000300014 ◽

2015 ◽

Vol 16 (3) ◽

pp. 632-642 ◽

Cited By ~ 3

Author(s):

Simone Frotas dos REIS ◽

Daiane Aparecida FAUSTO ◽

Sergio Raposo de MEDEIROS ◽

Pedro Veiga Rodrigues PAULINO ◽

Sebastião de Campos VALADARES FILHO ◽

...

Keyword(s):

Meat Quality ◽

Feed Intake ◽

Feed Efficiency ◽

Residual Feed Intake ◽

Beef Heifers ◽

System A ◽

Fat Thickness ◽

Ad Libitum ◽

Sorghum Silage

AbstractThis study aimed to evaluate feed efficiency and meat quality of 31 three-crossbred beef heifers during 84 days in a feedlot system. A 60:40 concentrate and sorghum silage ration on DM basis (ME = 2.73Mcal/kg of DM, CP = 11.90% DM) was fed ad libitum. Based on residual feed intake (RFI) calculations, the heifers were ranked in three groups of feed efficiency: High RFI (average mean = 0.776; n = 9), medium RFI (average mean = -0.010; n = 11), and low RFI (average mean = - 0.624; n = 11). High RFI heifers consumed 4.56% more DM per day than low RFI heifers (P <0.05). The ADG did not differ (P> 0.05) among RFI groups (1.40kg/day). No differences (P>0.05) were detected for digestibility of the nutrients: DM (64.00%), CP (60.01%), crude fat (72.90%), NDF (54.80%) and non-fibrous carbohydrate (NFC) (78.91%). There were no differences between low and high RFI groups for slaughter weight (475.00 vs. 479.55kg), hot carcass weight (259.09 vs. 261.44kg), Longissimus dorsi (LD) area (69.02 vs. 68.11 cm2), back-fat thickness (5.74 vs. 6.26 cm), shear force (5.45 vs. 5.19kg), sensorial traits of LD muscle, LD color (intensities L=40.47 a*=24.74 and b*=16.13) or commercial cuts yield. Low RFI heifers presented similar meat quality and carcass traits as high RFI heifers, however low RFI heifers consumed less DM (kg/d).

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Immunocastration and its effects on carcass and meat traits of male pigs

Semina Ciências Agrárias ◽

10.5433/1679-0359.2018v39n6p2531 ◽

2018 ◽

Vol 39 (6) ◽

pp. 2531

Author(s):

Nayara Andreo ◽

Ana Maria Bridi ◽

Caio Abércio da Silva ◽

Louise Manha Peres ◽

Barbara De Lima Giangareli ◽

...

Keyword(s):

Meat Quality ◽

Correlation Coefficients ◽

Point Of View ◽

Backfat Thickness ◽

Carrier Protein ◽

Swine Farm ◽

Protein Conjugate ◽

Ad Libitum ◽

The Moment

To compose the experiment, 160 male Topgen pigs - 80 surgically castrated (treatment 1) and 80 immunocastrated (treatment 2) - were randomly selected from a commercial swine farm at the moment of slaughter. Surgical castration was performed when the animals were seven days of age and immunocastration was performed by administering two doses (2 mL each) of immunocastration vaccine (analogue of GnRF linked to a carrier protein, development of anti-GnRF antibodies, 200 mg of a GnRF-protein conjugate/mL) when they were 104 and 132 days of age. Animals from both treatments were maintained in masonry stalls, where they received water and ad libitum diet (the same feed for both groups). The animals were slaughtered at 160 days of age, and the length and width of the testicles of immunocastrated animals were evaluated, along with the degree and number of carcass lesions, carcass traits and meat quality of both treatments. The means of these measurements were calculated and compared by Student´s t-test. For the immunocastrated treatment, Pearson´s correlation coefficients were also calculated for testicle length and width with backfat thickness. Approximately 80% of the immunocastrated animals had testicle widths of 11 cm or less. Immunocastrated animals showed higher degrees of lesions, pH (initial and 8 hours), hue, muscle depth and loin eye area and lower brightness, redness, chroma and backfat thickness than the surgically castrated animals. The correlation between testicle length and width with backfat thickness was inverse. Immunocastration can be an alternative to improve the proportion of lean meat (longissimus thoracis) instead of fat (backfat thickness) leading to better carcass and meat quality, since fat has become undesirable from a nutritional point of view in swine.

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Meat quality of Morada Nova lambs subjected to different feeding regimes

Semina Ciências Agrárias ◽

10.5433/1679-0359.2016v37n2p911 ◽

2016 ◽

Vol 37 (2) ◽

pp. 911 ◽

Cited By ~ 1

Author(s):

Antônio Clébio Ferreira da Silva ◽

Hélio Henrique Araújo Costa ◽

Maria Claudete Rodrigues Peres ◽

Adaílton Camelo Costa ◽

Diego Rodrigues de Sousa ◽

...

Keyword(s):

Fatty Acid ◽

Meat Quality ◽

Meat Product ◽

Live Weight ◽

Water Holding Capacity ◽

Feed Restriction ◽

Longissimus Dorsi Muscle ◽

Ad Libitum ◽

Water Holding

This study aimed to evaluate the effect of pre- and post-calving feed restriction on quantitative characteristics and lipid profile of meat from Morada Nova sheep. Twenty-four male lambs from single births only, with an initial weight of 10.0 ± 3.07 kg and at four months of age, were distributed in a randomized complete design, into three groups: pre-calving restriction (R-PRE; n=8) post-calving restriction (R-POS; n=8), and ad libitum feeding (ADLI; n=8). To make up the experimental treatments, the feeding regime applied previously on the sheep in the last third of pregnancy was considered. Treatments ADLI and R-POS were composed of lambs born from ewes fed ad libitum in the last third of pregnancy. Treatment R-PRE consisted of lambs born from ewes subjected to feed restriction in the last third of pregnancy at 60% of the recommended requirements for the group of ewes feeding ad libitum. For the lambs from treatments ADLI and R-PRE, the diet was supplied allowing 20% of the total supplied as refusals. For the animals from R-POS, a 30% restriction was imposed in relation to the animals feeding ad libitum. Animals were slaughtered with an average live weight of 25 kg. Afterwards, carcasses were chilled at 4 ºC for 24 h. Meat quality measurements were taken on the right side of each carcass; pH was determined immediately after slaughter and then again after chilling. Samples of the longissimus dorsi muscle were collected and frozen at -20 ºC. Moisture, ash, protein, total lipids, water-holding capacity, and cooking loss were determined in the meat samples, which were then subjected to the shear-force test. The sensory analysis was determined by the hedonic-scale test, in which sensory parameters of tenderness, juiciness, flavor, aroma, and overall acceptability and fatty acid profile were evaluated. There was a feed-restriction effect on protein, lipids, and water-holding capacity (P0.05). Saturated fatty acid contents were affected by the treatments (P0.05). Feed restriction does not compromise the physicochemical or sensory quality of Morada Nova lambs meat, but rather provides a meat product of good acceptance.

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Effects of early high nutrition related to metabolic imprinting events on growth, carcass characteristics, and meat quality of grass-fed Wagyu (Japanese Black cattle)

Journal of Animal Science ◽

10.1093/jas/skab123 ◽

2021 ◽

Author(s):

Sithyphone Khounsaknalath ◽

Kotaro Etoh ◽

Kaori Sakuma ◽

Kunihiko Saito ◽

Akira Saito ◽

...

Keyword(s):

Meat Quality ◽

Carcass Characteristics ◽

Milk Replacer ◽

Japanese Black Cattle ◽

Left Half ◽

Metabolic Imprinting ◽

Igf I ◽

Ad Libitum ◽

Imf Content

Abstract The study was conducted to clarify how early high plane of nutrition related to metabolic imprinting affected growth, carcass characteristics, and meat quality of grass-fed Wagyu (Japanese Black cattle). Wagyu steers were allocated randomly into two dietary groups: 1) steers fed milk replacer (crude protein 26.0%, crude fat 25.5%; maximum intake 0.6 kg/d) until 3 mo of age and then fed roughage (orchard grass hay) ad libitum from 4 to 10 mo of age (roughage group, RG; n = 11); 2) steers fed milk replacer (maximum intake of 1.8 kg per day) until 3 mo of age and then fed a high-concentrate diet from 4 to 10 mo of age (early high nutrition, EHN; n = 12). After 11 mo of age, all steers were fed roughage ad libitum until 31 mo of age and then slaughtered. Growth performance, carcass traits, longissimus muscle (LM) meat quality and intramuscular fat (IMF) content, plasma Insulin-like growth factor I (IGF-I) concentration, and bone mineral density were measured. Body weight was greater in EHN steers (571 kg) than RG steers (520 kg; P < 0.01). Plasma IGF-I levels were higher in EHN steers than in RG steers at 3, 10, and 14 mo of age (P < 0.01, P < 0.005, P < 0.001, respectively); however, plasma IGF-I levels were lower in EHN steers compared to RG steers at 30 mo of age (P < 0.01). The total weight of the muscles and bones of the left half of the carcass were not different between the two groups (P = 0.065). Five of the 19 muscles investigated (semimembranosus, P = 0.036; infraspinatus, P = 0.024; supraspinatus, P = 0.0019; serratus ventralis cervicis, P = 0.032; serratus ventralis thoracis, P = 0.027) were heavier in EHN steers. Total fat weight in the left half of the carcass was 30% greater (P = 0.025) in HNE carcasses. Subcutaneous and perirenal fat weights were 53% and 84% greater (P = 0.008, P = 0.002, respectively) in EHN carcasses. The LM IMF content was greater in EHN loins (13.2%) compared to RG loins (9.4%) at 31 mo of age (P = 0.038); however, no differences were found for shear force, tenderness, and cook loss. These results suggested early high-nutrition affected the growth and meat quality of livestock.

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

Agricultural and Food Science ◽

10.23986/afsci.52311 ◽

2016 ◽

Vol 25 (1) ◽

Cited By ~ 3

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.

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

Australian Journal of Agricultural Research ◽

10.1071/ar9770755 ◽

1977 ◽

Vol 28 (4) ◽

pp. 755 ◽

Cited By ~ 12

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.

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The Effect of Beef Production System on the Health, Performance, Carcass Characteristics, and Meat Quality of Holstein Bulls

Animals ◽

10.3390/ani10101922 ◽

2020 ◽

Vol 10 (10) ◽

pp. 1922

Author(s):

Naomi H. Rutherford ◽

Alan W. Gordon ◽

Gareth Arnott ◽

Francis O. Lively

Keyword(s):

Meat Quality ◽

Production System ◽

Production Systems ◽

Carcass Characteristics ◽

Concentrate Supplementation ◽

Grass Silage ◽

Health Performance ◽

Holstein Bulls ◽

Ad Libitum

The aim of this study was to evaluate the effect of production system on the health, performance, carcass characteristics, and meat quality of autumn born (AB) and spring born (SB) Holstein bulls. The study involved a total of 224 Holstein bulls and was conducted over two years (2017/18, 2018/19). The four production system treatments differed during the grower period and consisted of: (i) grazed with no concentrate supplementation (G), (ii) grazed with 2 kg concentrate supplementation per day (G2), (iii) grazed with ad libitum access to concentrates (GA) and (iv) housed with ad libitum access to concentrates and grass silage (HA). All bulls were finished on ad libitum concentrates and grass silage and were slaughtered at a mean age of 15.5 months. Total grower dry matter intake (DMI) (p < 0.001) and total finishing DMI (p < 0.001) differed between production systems for both AB and SB bulls, with that of GA bulls being the greatest in both cases. Average daily gain (ADG) during the grower period was greatest (p < 0.001) for the HA production system in the AB bulls and the GA and HA production systems for the SB bulls. However, during the finishing period, G bulls had the greatest (p < 0.001) ADG of the AB bulls, while that of the SB bulls was from the G2 production system (p < 0.001). For both AB and SB, bulls on the GA and HA production systems produced heavier cold carcass weights than the G and G2 bulls (p < 0.001). There was no significant difference (p > 0.05) in health, carcass conformation, fat classification, or meat quality between production systems.

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