scholarly journals Quantitative meat quality parameters of broilers from different rearing systems

2004 ◽  
Vol 20 (3-4) ◽  
pp. 113-119
Author(s):  
Snezana Bogosavljevic-Boskovic ◽  
Zlatica Pavlovski ◽  
Milun Petrovic ◽  
Vladimir Doskovic

Bearing in mind both certain established European Union regulations on the non-industrial poultry meat production and rearing specificities in our conditions, experimental investigations were conducted with the aim of examining the effect of two different rearing systems (outlet fattening and extensive rearing in the chicken-pen) on major quantitative characteristics of dressed broiler carcasses. The initial material used in the experiment consisted of one-day old chickens of the Hybro G strain. Following the 56-day fattening period, the shares of dressed carcasses, slaughter by-products, abdominal fat and basic carcass parts were determined by measuring at the slaughter line. Based upon the data mentioned, major quantitative meat parameters of trial broilers were calculated. The research results analyzed lead to the conclusion that there are no particularly significant differences between the outlet-reared broilers (one chick per square metre of the outlet area) and the extensively reared ones (12 broilers per square metre of the floor area) in terms of major slaughter characteristics.

2005 ◽  
Vol 21 (3-4) ◽  
pp. 133-140
Author(s):  
Snezana Bogosavljevic-Boskovic ◽  
Sreten Mitrovic ◽  
Vera Radovic ◽  
Milun Petrovic

Bearing in mind certain established European Union regulations on non-industrial poultry meat production, experimental investigations were conducted with the aim to examine the effect of two different rearing systems (free-range rearing and extensive rearing in the chicken pen) on some meat quality characteristics. Investigation results on the shares of muscular tissue, bones and skin in major carcass parts (breasts, thighs and drumsticks) were used as poultry meat quality parameters. Based upon the obtained study results, it could be concluded that a somewhat higher meat share in breasts and drumsticks was recorded with the free-range-reared broilers as compared to the extensively reared ones. A somewhat higher meat share in the drumsticks was registered with the hens whereas other differences from the point of view of the sex effect were small.


2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Antonia Albrecht ◽  
Martin Hebel ◽  
Maureen Mittler ◽  
Carola Hurck ◽  
Katharina Kustwan ◽  
...  

Production-specific factors, such as breeding, diet, and stress, are known to influence meat quality, but the effect of different husbandry systems on the development of quality parameters and shelf life has hardly been investigated. Thus, the aim of the study was the investigation of an alternative production system based on a slow-growing, corn-fed, and antibiotics-free chicken line compared with conventional poultry production. Additionally, the effect on meat quality, microbiology, and spoilage was analyzed. In total, 221 breast filets from a German poultry meat producer were investigated. Nutritional, biochemical, and cooking loss analyses were conducted on a subset of samples 24 h after storage. The rest of the samples were stored aerobically at 4°C, and the spoilage process was characterized by investigating pH, color, lipid oxidation, microbiology, and sensory attributes subsequently every two days during storage. The alternative production line showed a significantly healthier nutritional profile with a higher protein and lower fat content. Additionally, the amount of L-lactic acid and D-glucose was significantly higher than in the conventional production line. The color values differed between both production lines, with the corn-fed line displaying more yellowish filets. The lipid oxidation and microbial spoilage were not affected by the production line. The shelf life did not differ between the investigation groups and was deemed 7 days in both cases. Despite the highest severity of white striping being observed most in the conventional production line, there was no overall difference in the incidence among groups. The purchase decision was affected by the occurrence of white striping and showed a tendency for a higher acceptance for the alternative production line.


2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Agustín Nieto-Carmona ◽  
Jeny Aguilar-Acevedo ◽  
María De la Salud Rubio-Lozano ◽  
Pedro Antonio Alvarado-García ◽  
Graciela Tapia ◽  
...  

Commercial availability of a generic zilpaterol HCl (ZH) premix preparation for beef cattle in Mexico motivated a non-inferiority trial vs the reference preparation. The trial was conducted on zebu-type cattle (Bos indicus) under humid tropical conditions. Meat production and basic meat quality were assessed for 810 zebu bulls, aged 18-22 months and weighing 430 to 490 kg. Bulls were randomly assigned into one of three groups: ZHg, treated with the generic ZH (Zipamix®) preparation; ZHr, treated with the reference ZH (Zilmax®) preparation, and Cg, the untreated control group. Housing, shade surface, feeding and water availability were highly homogeneous between the animals’ pens. Results for the measured productive and meat quality parameters showed that both ZH-treated groups had higher values than the Cg (P < 0.05), and differences between the ZHg and ZHr groups were not statistically significant, thus fulfilling the criteria of a non-inferior ZH preparation. In this assay, ZH supplementation did not modify the amounts of moisture, fat, protein or ash in the Longissimus dorsi muscle compared with the meat from non-supplemented animals, and the overall meat acceptability was unaffected (P > 0.05).


Foods ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 418 ◽  
Author(s):  
Tersia Needham ◽  
Retha A. Engels ◽  
Daniel Bureš ◽  
Radim Kotrba ◽  
Berndt J. van Rensburg ◽  
...  

The effects of sex and production systems on carcass yield, meat quality and proximate composition of sub-adult impala were evaluated by culling 35 impala from intensive (12 males) and semi-extensive (12 males and 11 females) production systems within the same game farm. While no sexual dimorphism was found for carcass weights, male impala had a higher dressing percentage than females, indicating a higher meat production potential. Few differences were observed for yields between the male impala from the different production systems, but physical meat quality parameters indicated possible stress for those kept intensively. Minor differences existed in physiochemical parameters between various impala muscles for the two sexes and production systems, providing little motivation for these factors to be considered when processing sub-adult impala carcasses. Impala meat from both sexes, all muscles and all production systems produced meat with shear force values below 43 N, and thus may be considered as tender. Furthermore, the proximate composition of all impala meat in this study ranged from 74.7 to 77.0 g/100g moisture, 20.7 to 23.5 g/100g protein, 1.2 to 2.2 g/100g fat and 1.1 to 1.3 g/100g ash content. These values compare favorably to other game species, indicating that impala meat may serve as a lean protein source.


Author(s):  
Pavel Nevrkla ◽  
Eva Václavková ◽  
Pavel Horký ◽  
Vendula Kamanová ◽  
Zdeněk Hadaš ◽  
...  

The objective of the performed experiment was to evaluate growth performance and selected carcass traits and meat quality parameters in pigs of a native Czech breed Prestice Black-Pied pig (PB) and a commercial hybrid (H) used for meat production. The observation included 40 pigs, 20 pigs of the native breed PB and 20 pigs of the hybrid combination. The PB piglets showed higher (P ≤ 0.05) birth weight than the H piglets. The lifetime weight gain was higher (P ≤ 0.01) in the H pigs than in the PB pigs. The results also showed higher (P ≤ 0.01) backfat thickness in the PB breed than in the H pigs. Lean meat content was higher (P ≤ 0.01) in the hybrid pigs than in the PB breed. Higher (P ≤ 0.01) values of intramuscular fat content were found in the PB pigs than in the H pigs. Drip loss value was higher (P ≤ 0.01) in the H pigs by 1.3 % than in the PB pigs. The PB pigs showed more favourable (P ≤ 0.05) values of pH45,24 in comparison with the hybrid pigs.


2009 ◽  
Vol 54 (No. 11) ◽  
pp. 490-497 ◽  
Author(s):  
M. Lichovníková ◽  
J. Jandásek ◽  
M. Jůzl ◽  
E. Dračková

: In chick hatcheries, males of laying hybrids are considered to be “waste” and the majority of these males are killed just after hatching. On the other hand, the interest of consumers in products from alternative systems (organic, free-range) is increasing. The idea was to evaluate the meat quality of these males when they have access to free range because there is not such a study available. The aim of this study was to compare the physical and sensory quality of the meat of layer males with fast-growing broilers at the same age when they had both access to free range and when they were fed to 49 and 90 days of age. Slow-growing ISABROWN (IB) layer males and fast-growing Ross 308 (RS) chickens were kept in free-range conditions to evaluate carcass and meat quality at 49 days and 90 days of age. Live weight, carcass yield, breast meat yield and the proportion of abdominal fat were significantly higher (<I>P</I> < 0.001) in RS at both ages. The proportions of fat in the breast meat were significantly lower (<I>P</I> < 0.01) in IB at both ages. The value of pH 24 h was significantly higher in IB and the meat was darker (<I>P</I> < 0.001) in these chickens. The overall acceptability was significantly better (<I>P</I> < 0.01) in IB at 90 days of age. The laying males are acceptable for an alternative system of poultry meat production from the aspect of meat quality. The quality was comparable or even higher in comparison with fast-growing chickens.


2014 ◽  
Vol 77 (1) ◽  
pp. 127-132 ◽  
Author(s):  
INES BLACHA ◽  
CARSTEN KRISCHEK ◽  
GÜNTER KLEIN

Poultry meat is often stored in modified atmosphere packaging (MAP) or vacuum packaging to improve consumer acceptance and shelf life. The aim of this study was to determine how different packaging conditions influence meat quality. Therefore, in three independent experiments, turkey breast muscle cutlets were packaged either in vacuum or in different modified atmosphere mixtures (80% O2, 20% CO2 [MAP 1]; 80% N2, 20% CO2 [MAP 2]; and 20% O2, 20% CO2, 60% N2 [MAP 3]) and stored for 12 days at 3°C. Color, pH, electrical conductivity, total viable counts, and Pseudomonas species were determined on days 1, 4, 8, and 12 of storage. On the same days, samples were collected for analysis of thiobarbituric acid–reactive substance and total volatile basic nitrogen concentrations. Sensory parameters and liquid loss were determined on days 4, 8, and 12. Vacuum-packaged meat had the highest liquid loss and lowest sensory results. MAP 1–packaged meat showed the highest sensory, redness, and thiobarbituric acid–reactive substance values. MAP 2–packaged meat had lower sensory values. MAP 3–packaged meat had lower redness and sensory values, especially at the end of storage. The study showed an impact of the packaging condition on different quality parameters, with a small advantage for storage of turkey cutlets in high-oxygen packages.


2018 ◽  
Vol 20 (86) ◽  
pp. 57-61
Author(s):  
R.M. Muniv

Meat products are an important element of the diet of most European consumers. The most common types of meat consumed in the European Union (EU) are beef and veal, pork, poultry (from which chicken and turkey are the most common), as well as young lamb. Moderate growth of meat production is forecast in the EU countries, which in 2030 will attain 47.5 million tons, that on 0.5% anymore by comparison to 2017 year. An increase will take place, above all things, due to the increase of volumes of poultry meat («plus» 4.6% by comparison to 2017), a small increase is expected on pork («plus» 0.4%). The production of beef will reduce on 7.4%. Basic pre-condition to the increase of production of meat in the EU countries of the expected increase of volumes of his export which will be stipulated world tendencies to growth demand on meat products. During the next 14 years EU plans to grow the volumes of meat export almost on 9% to 4.7 million tons, and it will remain net exporters. Thus, if both pork and poultry meat a general export will exceed an import substantially, balance on a beef is expected negative, and the volumes of its import to EU for indicated period will grow on 22%. In the EU, beef production continues to decrease slightly. The general decline was less than 1%, which is due to the conservation of animals in order to increase the size of the dairy herd, as a result of an increase in milk quotas. The EU has a high degree of self-sufficiency in relation to pork and therefore imports little. Import quotas are not used, because the import of some licensed countries does not meet veterinary standards. Thus, imports are effectively prohibited, although tariff quotas would be favorable. The EU does not interfere in the domestic pork market, nor does it play a leading role and export subsidies. The poultry meat is represented by a very diverse group of meat varieties from chickens, turkeys, geese, ducks to cesarocks. The production of chicken meat accounts for 70% of the total poultry production in the EU, while the production of turkey meat is 20%. The remaining 10% are distributed among other poultry in the EU. Internal consumption of meat in European Union by the populations beginning from 2018 year will have a tendency to the unimportant (within the limits of 1%) decrease. In 2030 an index of meat consumption per inhabitant in EU will be at high level and will make 85.3 kg per person in for slaughter weight. In the pattern of consumption in the nearest decades, as well as today, will championship be kept after pork (almost 48%), farther poultry meat (32%), beef (18%) and other kinds (2%). For the European experts forecast, during 2017–2030 price tendencies on the world and European markets of meat will look thus: on a beef – costs of EU-28 will decline on 1%; is a world price a decline on 19%; on the pork – costs of EU-28 a decline is on 5%; global price a decline on 4%; on a poultry meat are costs of EU-28 a decline is on 4% and global price will increase on 15%.


2011 ◽  
Vol 51 (No. 1) ◽  
pp. 31-38 ◽  
Author(s):  
S. Bogosavljevic-Boskovic ◽  
V. Kurcubic ◽  
Petrovic MD ◽  
V. Radovic

The objective of this study is an analysis of meat quality in broilers of standard fast-growing hybrid Hybro G, reared in two different non-industrial systems (extensive rearing in a poultry house or &ldquo;extensive indoor&rdquo; system and rearing in a poultry house using a free range or &ldquo;free-range&rdquo; system). Quality parameters, i.e. proportions of basic carcass parts (breasts, drumsticks and thighs), abdominal fat, and proportions of basic tissues (muscles, bones and skin) in more valuable carcass parts, were investigated. The aim of the investigation was to analyse the effect of the two non-industrial rearing systems and broiler sex on the above-mentioned traits of broiler meat quality. The used rearing systems (free-range and extensive indoor ones) did not have a statistically significant effect on the proportions of major basic carcass parts and of abdominal fat in broiler chickens (P &gt; 0.05). Heavier carcasses at slaughter (on the 56<sup>th</sup> day of fattening) were recorded in the male broilers compared to the female ones, the differences being statistically significant (P &lt; 0.01). The drumstick proportion in the male broiler carcasses was statistically significantly higher (P &lt; 0.05) than the proportion in the female broilers. The interaction between the investigated effects (of sex and rearing system) did not exert a statistically significant effect on the proportions of major basic carcass parts and abdominal fat in broiler chickens (P &gt; 0.05). The rearing system (free-range and extensive indoor) and the interaction between the investigated effects (of sex and rearing system) did not affect statistically significantly the differences expressed in the meat, skin and bone proportions in breasts, drumsticks and thighs of the broilers (P &gt; 0.05). The sex effect on the skin proportions in breasts, drumsticks and thighs was not statistically significant (P &gt; 0.05). Average muscle proportions in drumsticks and thighs of the female broilers were statistically highly significantly (P &lt; 0.01) and significantly (P &lt; 0.05) higher compared to those in the male broilers. Average bone proportions in the breasts of the male broilers were statistically significantly higher (P &lt; 0.05) than those in the female ones, and statistically highly significantly higher (P &lt; 0.01) in drumsticks and thighs. &nbsp;


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