Using sheep selection to improve the nutritional value of lambmeat

Relevance. The article provides a justification for the use of sheep selection taking into account the intra-breed type of Prekos ewes in purebred breeding and crossing with producers of semi-fine wool breeds Romney-Marsh and Kuibyshevskaya to improve the biological usefulness of meat in offspring.Methods: scientific and economic experiment in the use of different selection options, taking into account the productive type of sheep of the Precos breed.Results. The article presents the results of a study on the influence of the selection of sheep on the composition of lambmeat, increasing the usefulness and quality of meat and, thus, the efficiency of its production. It was found that the content of water in the meat of crossbred animalswas lower compared to purebred Precos. There is a lower water content in the meat of rams obtained from sheep of the Precos meat-wool type, both in purebred and crossbred animals. In terms of the protein content in meat, there is an advantage in rams with purebred breeding and crossing compared to meat obtained from the wool-meat type of queens. In the hip bran of purebred animals and crossbreeds with the Kuibyshev breed, this superiority was 1.1% (Р > 0.95), and in the lumbar bran of Romney-Marsh crossbreeds, this difference was 1.6% (Р > 0.95). Mutton from the offspring of the sheep of meat-wool type is characterized by a significantly high content of the essential amino acids threanine, lysine, leucine, phenylanin and isoleucine in comparison with meat from the offspring of the wool-meat type of sheep. A significant superiority was also established in the content of interchangeable amino acids — oxyproline, serine, tyrosine, proline, glycine, aspartic and glutamic acid, cystine and analin.

Gross, Microanatomical and Ultrastructural Studies of Interdigital Gland in Madras Red Sheep (Ovis aries)

Background: Madras Red sheep is a well-recognized meat type breed reared only on free range system to yield tasty meat. The aim of this study was to determine the gross, microanatomical and ultrastructural details of the interdigital gland in Madras Red sheep. Methods: The interdigital glands were removed immediately after slaughter and subjected for gross morphological, histological, immunohistochemical studies and ultrastructural observations. Result: The results revealed that a well-developed tobacco-pipe shaped interdigital gland was present in all the four limbs which was composed of an orifice, excretory duct, body and bent or flexure. Histologically, wall of the gland was composed of epidermis, dermis and capsule from within outward. Epidermis was made of stratified squamous keratinized epithelium. Dermis was composed of dense irregular connective tissue with sweat, sebaceous glands, arrectores pili muscle and hair follicles were embedded within. The sweat gland appeared as group of tortuous tubules under scanning electron microscope. The oily secretion of the gland helps in maintaining the healthiness of foot during movement of the animal.

Effect of different fattening period duration on meat productivity of domestic quails

The study was conducted with 224 domestic quails from the specialized meat-type WG line. The duration of fattening period and sex on productive traits, slaughter traits and meat quality of quails was evaluated. The study has shown that the longer duration of the fattening period in quails from the meat-type line WG was associated with lower production efficiency, with more reduction after the 35th day of life. The production efficiency in male quails was lower compared to that in females. The dispersion analysis demonstrated that the determination of 72.2% and 69.6% of dressed carcass weight and deboned meat weight, respectively, depended on fattening period duration (p<0.001). When fattening increased from 28 to 42 days, the amount of feed necessary for one bird increased by 73% and 87%, corresponding to increased costs by 64.5% and 77%. For production of 1 kg dressed quail carcasses, the necessary feed increased by 42.3-45.8% on a weight basis and by 35-37.7% on a cost basis. For production of 1 kg deboned quail meat, corresponding increases are by 42.1-49.5% and 34.8-41.2%, respectively. The period between 28 and 35 days of age was the most appropriate for planning slaughter of WG quails. During that period, the economic efficiency, although already declining, was still within acceptable limits and the increase in quantitative traits in both sexes – still relevant, making the produce more attractive for consumers. With age, the changes in colour characteristics of M. pectoralis superficialis result in darkening of meat (p<0.001). Thus, it assumes nuances specific rather for game meat. This effect is desirable, as it improves the commercial presentation of domestic quail meat in line with consumers’ attitudes.

Evaluation of Welfare in Commercial Turkey Flocks of Both Sexes Using the Transect Walk Method

The study was conducted between March and September 2019 in six meat-type turkey flocks with similar management standard procedures using the transect walk method. The concept of the method is based on visual observation of the birds while slowly walking across the entire farm in predetermined transects. Each flock was evaluated at three different times during the fattening cycle: at 3 to 4, 12 to 13, and 19 to 20 weeks of age, and total number of males and females that were immobile or lame, had visible head, vent, or back wounds, were small, featherless, dirty, or sick, had pendulous crop, or showed aggression toward birds or humans were recorded. At each visit, NH3 and CO2 were measured within the facilities. In the first assessment, the most frequently observed welfare indicators were small size (0.87%) and immobility (0.08%). Males showed a significantly higher prevalence of small size (p < 0.01), sickness (p < 0.05), and dirtiness (p < 0.1) compared to females. In the second assessment, the most common findings in both sexes were dirtiness (1.65%) and poor feather condition (1.06%), followed by immobility (0.28%). Males were significantly dirtier (p < 0.001), had more immobile birds (p < 0.01) and birds with vent wounds (p < 0.1), but had fewer sick birds (p < 0.05). In the last assessment, an increase in immobile, lame, sick, and dead birds was recorded, indicating an increase in health problems. Higher CO2 (3000 and 4433 ppm) and NH3 (40 and 27.6 ppm) values were noted only at the first assessment in two facilities. Further analyses showed that slightly elevated NH3 and CO2 levels did not influence the occurrence of welfare indicators. This study is the first description of the welfare of commercial turkey flocks in Slovenia.

Studying Chemical Composition of Myofibril and Sarcoplasmic Proteins Separated From Different Types of Meats

The present study was dealt with the estimation of the chemical composition (moisture, protein, fat, and ash) and physical properties (pH and water holding capacity) of camel, duck, and tuna meat purchased from local markets. Muscle proteins were separated, including myofibril and sarcoplasmic proteins from these meats, estimation of the yield and study of their content. have been studied. the results were as follows: 1. Statistical results disclosed that there was a significant difference at a probability level (P≤0.05) in the percentage of moisture, protein, fat, ash, pH, and values of water holding capability in each of camel, duck, and tuna's meat. 2. Statistical results made a clear reference that there were significant differences at a probability level (P≤0.05) in the percentage of yield, moisture, protein, fat, and ash of myofibril and sarcoplasmic proteins in each of camel, duck, and tuna's meat. Also, a dual interference between meat type and protein type was significant in its impact on percentages of yield and chemical composition. 3. It was observed the percentage of moisture and fat in tuna meat was higher than the percentage of moisture in duck meat. As to the lowest percentage of moisture, it was in the meat of tuna, while the tuna meat recorded the highest percentage in protein and ash, then followed by the percentage of protein and ash in duck meat, while camel's meat recorded the lowest percentage of protein and ash. Besides, results indicated that the values of pH and water holding capability of duck meat were higher than that in the meat of tuna meat and camel. 4. It was found that the percentage of the yield for proteins of a myofibril of duck meat was higher than that in the meat of tuna and camels, as the percentage of yield of sarcoplasmic proteins for tuna was higher than that in the meat of duck and camels. 5. It was found that the percentage of yield for myofibril of duck meat was higher than that in the meat of tuna and camels. As to the percentage of yield for sarcoplasmic proteins of tuna meat, it was higher than that in the meat of duck and camels. 6. The highest percentage of moisture for myofibril proteins was in the meat of camels, and the lowest percentage of it was registered in myofibril proteins in tuna meat, whilst the highest percentage of moisture for sarcoplasmic proteins was registered in the meat of duck, and the lowest of it registered in sarcoplasmic proteins in tuna meat. 7. It was observed that the highest percentage of protein and fat for myofibril and sarcoplasmic proteins was registered in tuna meat, as the lowest percentage of protein and fat for myofibril and sarcoplasmic proteins were observed in duck meat. 8. The study came up with a result revealing that the percentage of ash in proteins of myofibril proteins for duck meat was higher than that in myofibril proteins for camels and tuna meat, whilst, the percentage of ash in sarcoplasmic proteins for camel meat was higher than that in sarcoplasmic proteins for duck and tuna meat. 9. Results showed that the highest concentration of sarcoplasmic proteins was in tuna meat, followed by duck meat, and the lowest concentration for these proteins was in camel meat. The values of proteins (myosin, tropomyosin, reticulin, and collagen) in camel meat, then followed by duck meat, whilst the lowest values for these proteins were in tuna meat.

Breeding Strategy of Local Muscovy to Support the Development of Meat Type Duck Industry

<p>Muscovy duck is one of the genetic resources of waterfowl that spreads almost all over Indonesia. Muscovy duck is classified as meat-producer waterfowl, because of its relatively large body weight and better meat quality compared to other waterfowl. Therefore, cross breeding between Muscovy and ducks were often conducted by farmers to produce offspring with large body weight in order to anticipate the higher demand for duck meat. If this crossing pattern has been widely adopted by breeders, it will require a larger number of Muscovy duck. Whereas, currently the population of Muscovy is relatively low and no breeding system exists both at the community farm level or industrial level. Therefore, a development program of local Muscovy duck, especially its breeding program needs to be done immediately. As an information material to facilitate the preparation of the program, this paper describes factors that affect the breeding program including production performance and reproduction, as well as the breeding strategy of Muscovy duck as candidates of male line to form special type of meat type ducks through 3 groups of livestock breeds in the shape of a conical triangle at the top. The top position was the pure stock (nucleus), the middle was the parent stock (multiplier) and the bottom was the commercial stock. The genetic quality of livestock flows from the top position to the bottom and cannot be the other way around, because the breeding system is closed in the pure stock (nucleus).</p>

Economic Contribution of Wildlife to Bushmeat Market in Ikire, Osun State, Nigeria

This paper assessed the economic contribution of wildlife to bushmeat market in Ikire, Osun State, Nigeria. Primary data were collected using semi-structured questionnaire and in-depth interview of targeted respondents. Bush meat sellers in Irewole local government area, Ikire were sampled. Data were analyzed using descriptive statistics, budgetary analysis and likert scale analysis. The result showed that majority of the bushmeat sellers were females (55.9%) with a mean age of 41 years. Most of the bushmeat sellers strongly agreed (4.91±0.09) that they generate more income from bushmeat trade, 4.71±0.17 equally noted that customers prefer to purchase bushmeat than convectional meat type while 1.56±0.19 disagreed that seasonal change affects customer’s preferences for bushmeat in the markets. Also, 5.00±0.0, 4.82±0.13, 4.74±0.17 respectively believes that bushmeat are more delicious, better source of protein, more of medicinal value when compared with conventional meat type. Furthermore, an average of 3.70±0.2 had cultural sentiments for the consumption of bush meat. An average net profit per respondent yielded ₦3,565.53, while BCR and profitability index are 1.95 and 0.95 respectively. Conclusively, bushmeat trading is a profitable and very lucrative enterprise.