Estimation De La Qualité De La Carcasse Des Agneaux De Boucherie

-The influence of concentrate or feed blocks with or without Polyethylene glycol (PEG, molecular weight 4000) on the carcass characteristics and weight of offal components of 25 Barbarine ram lambs offered Acacia cyanophylla Lindl. foliage was studied. The animals were divided into 5 equal groups and housed in individual pens for 74 days. All of the animals received 400 g oat hay and air-dried foliage of acacia ad libitum. Two groups were supplemented with 300 g concentrate with (C PEG ) or without (C) 20 g PEG. The other groups had free access to urea-containing feed blocks with (BU PEG ) or without (BU) PEG. One other treatment was a PEG-containing feed block without urea (B PEG ). PEG was used to preferentially bind A. cyanophylla condensed tannins (CT). At the end of the growth trial, the animals were slaughtered, offal components were weighed, left half carcasses were dissected and carcass tissues were weighed. At slaughter, body weight (BW) was the highest (P < 0.01) in the group receiving concentrate and PEG (35.4 kg). The animals on diets C, B PEG and BU PEG were slaughtered at similar BW (33.4, 31.8 and 32.1 kg, respectively) and those on BU had the lowest BW (27.8 kg). Dressing percentage was not affected by diet treatments. The weights of the head, feet, lungs, heart and abomasum were not affected by the diet. The diet significantly influenced the skin, testes, liver, kidneys and rumen weights. The animals fed concentrate had heavier skin (4485 g) and rumen (812 g) than those fed blocks (3773 and 720 g for the skin and rumen, respectively). The animals receiving BU had the smallest organs. On contrasting treatments plus/minus PEG, it was observed that PEG administration significantly increased the weight of all organs. PEG supply significantly increased (P < 0.01) testis weight (196 vs. 127 g with/without PEG). Due to treatment effects on slaughter BW and hence carcass weight, muscle, bone and fat weights were lower in the BU group compared to those in the other groups. In C, C PEG , B PEG and BU PEG groups, there was no significant difference in body muscle weight. Indeed, the animals fed A. cyanophylla with feed blocks with PEG and without urea (B PEG group) produced the same amount of muscle as those produced with PEG and urea-containing feed blocks or conventional diets (concentrate). The animals given feed blocks (more protein and less energy than the concentrate) were less fat (20.0%) than those receiving concentrate (24.7%). The use of acacia foliage and feed blocks without urea but containing PEG may be a useful solution to produce lean lamb in a more economic manner. lamb / Acacia cyanophylla Lindl. / tannins / concentrate / feed blocks / polyethylene glycol / carcass quality / offal weight Résumé -Incorporation dans le concentré ou les blocs alimentaires de polyéthylène glycol : effets sur la composition de la carcasse et le poids des abats chez les agneaux de race Barbarine nourris avec des feuilles d'Acacia cyanophylla Lindl. Les effets de la complémentation ou non de l'aliment co...

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“…The increase in these parameters resulted from a BW increase. Numerous authors [1,14,18,29,30,36] reported such a relationship.…”

Section: Discussionmentioning

confidence: 95%

Effects of polyethylene glycol in concentrate or feed blocks on carcass composition and offal weight of Barbarine lambs fed Acacia cyanophylla Lindl. foliage

2003

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“…In suckling lambs, internal types of adipose deposits represent an important quantity of total fat and are used as indicators of carcass fatness (Flamant & Boccard ), which is influenced by breed under steady intrinsic and productive factors (such as sex, weight, age and feeding systems). In this context, the comparative RNA‐seq analysis between suckling lambs from Assaf and Churra sheep presented here provides a list of DEGs and functional enriched GO terms that may underlie carcass characteristics of both breeds.…”

Section: Discussionmentioning

confidence: 99%

“…The quantity and composition of adipose deposits have a clear influence on the quality of ruminant carcasses. In lambs, internal types of adipose deposits, such as perirenal and pelvic fat, represent a notable proportion of the total fat during the first weeks of life (Vezinhet & Prud'Hon ) and are used as indicators of total carcass fatness (Flamant & Boccard ). According to Miguélez et al .…”

Section: Introductionmentioning

confidence: 99%

Early adipose deposits in sheep: comparative analysis of the perirenal fat transcriptome of Assaf and Churra suckling lambs

et al. 2018

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Adipose deposits influence the quality of ruminant carcasses, and in suckling lambs, internal types of adipose deposits represent a notable proportion of total fat. The aim of this study was to perform a comparative analysis of the perirenal fat transcriptomes of suckling lambs from two breeds with different growth and carcass characteristics. The perirenal fat tissue from 14 suckling lambs (Assaf, n = 8; Churra, n = 6) was used for the RNA-seq analysis. The functional enrichment analysis of the 670 highly expressed genes (>150 fragments per kilobase of exon per million fragments mapped) in the perirenal fat transcriptome of both breeds revealed that the majority of these genes were involved in energy processes. The expression of the UCP1 gene, a classical biomarker of brown fat, and the presence of multilocular adipocytes in the two breeds supported the presence of brown fat at the transition stage towards white fat tissue. The differential expression analysis performed identified 373 differentially expressed genes (DEGs) between the two compared breeds. Brown/white fat gene biomarkers were not included in the list of DEGs. In Assaf lambs, DEGs were enriched in Gene Ontology (GO) biological processes related to fatty-acid oxidation, whereas in Churra lambs, the majority of the significantly enriched GO terms were related to cholesterol synthesis, which suggests that upregulated DEGs in Assaf lambs are implicated in fat burning, whereas the Churra upregulated DEGs are linked to fat accumulation. These results can help to increase knowledge of the genes controlling early fat deposition in ruminants and shed light on fundamental aspects of adipose tissue growth.

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“…The conformation score is an important parameter for carcass quality assessment (Flamant and Boccard, 1966). In our study the average value of 2.39, with 28.1% in R-conformation and 71.9% in O-conformation, reflected a fair to good muscle development.…”

Section: Subjective Carcass Characteristicsmentioning

confidence: 49%

Quality characteristics of the carcass of Beni-Guil sheep, a Protected Geographical Indication certified product of Eastern Morocco: Preliminary study

Belhaj

Mansouri

Tikent

et al. 2020

Rev. Elev. Med. Vet. Pays Trop.

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The objective of the study was to evaluate, for the first time, the qualitative, objective and subjective characteristics of the carcass and meat of the Beni-Guil sheep breed, originating in Eastern Morocco. The study was conducted with 105 ewes and ewe lambs with a mean age of 21.5 months (8–36 months), and a mean weight of 32.55 kg. pH measurements were taken one hour and 24 hours after slaughter. The mean values obtained were 6.76 and 5.78, respectively. The mean hot (HCW) and cold (CCW) carcass weights and corresponding yields were 15.82 kg (48.6%) and 15.52 kg (47.7%), respectively. Shrinkage loss was 1.9%. Linear measurements showed that the Beni-Guil had a mean carcass length (K) and width (G) of 63.7 and 17.3 cm, respectively, with a carcass compactness index 1 (G/K) and 2 (CCW/K) of 0.27 and 243.60 g/cm, respectively. Finally, according to the EUROP sheep carcass classification grid, the carcasses examined showed conformations between fairly good (O) and good (R), a bright red color, a firm white fat cover, and a fatness score of 3.42. The results highlighted the characteristics of the Beni-Guil ewe carcass, which are sought by professionals and consumers.

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Estimation De La Qualité De La Carcasse Des Agneaux De Boucherie

Cited by 9 publications

References 19 publications

Effects of polyethylene glycol in concentrate or feed blocks on carcass composition and offal weight of Barbarine lambs fed Acacia cyanophylla Lindl. foliage

Effects of polyethylene glycol in concentrate or feed blocks on carcass composition and offal weight of Barbarine lambs fed Acacia cyanophylla Lindl. foliage

Early adipose deposits in sheep: comparative analysis of the perirenal fat transcriptome of Assaf and Churra suckling lambs

Quality characteristics of the carcass of Beni-Guil sheep, a Protected Geographical Indication certified product of Eastern Morocco: Preliminary study

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