Measurement of lean meat on slaughter line and formation of price on the basis significantly contribute to the overall improvement of the quality and profitability of production and distribution of pork. The content of lean meat on live pigs was measured on farm using ultrasound device PIGLOG 105. While in slaughterhouse, the content of lean meat measured using Fat-O-Meater (FOM), two-point method (TP) and partial dissection. 59.30% of lean meat in vivo was estimated by the apparatus PIGLOG-105 one day before slaughter. It is 0.91% more then partial dissection and when compared to FOM and TP it is more 4.86% and 4.02%. Great deviation between PIGLOG-105 on one side and FOM and TP on other side indicated some error, and then partial dissection solved this mystery. After this study, slaughterhouse constructed new formulas for FOM in pig carcass classification. Regarding that, slaughterhouses which used FOM or similar equipment for measuring percentage of lean meat, should control results of the equipment described in this study, minimum twice a year.
Determining the post-mortem interval (PMI) is often a very demanding and delicate job which requires a good knowledge of postmortem changes. In this study, 20 domestic pig carcasses (Sus scrofa) whose death occurred within 8 h before the start of the study were simultaneously laid at the same geographical location, but in different environments (on the ground surfaceS ; buried in the ground-G; placed in a crate and buried in the ground-C; submerged in water-W; and hanging in the air-A). One carcass from each group was sampled on days 14, 28, 120 and 190 from the beginning of the experiment, and on that occasion, a detailed analysis of postmortem changes and an autopsy was carried out. The difference in the rate of decomposition among groups was statistically significant. The fastest decomposition occurred in carcasses placed in a crate and buried, because during the winter period the temperature in the air was below 0°C. At that time, the decomposition process and the insect activity were slowed or stopped on carcasses in groups S, A, W, and G to some extent, while the ground and wooden crate were good thermal insulators for group C carcasses and provided better conditions for insect activity.
Commercial, industrial pig production requires from manufacturer, to produce a large number of fattening pigs per sow per year, with most rational business, smaller losses in all production stages, greater growth and achievement the desired inal weight in the shortest possible time. To make production economically viable in the conditions present on most domestic commercial pig farms with regard to the accommodation and environmental conditions, the present technology and health status is important to allow such animal nutrition that will satisfy the nutritional and health requirements and allow the animals adequately respond to the physiological burdensome conditions of intensive production in the body and exert maximum existing genetic potential in farm conditions. In our study conducted on a large commercial farm, inclusion hepatoprotective preparation based on lavonoids from plant extracts and phosphoryl choline chloride as an feed additives several signi icant improvements in production are realized: reducing mortality, increased weight gain in fattening the higher meat yield in a shorter time and to improve health status of fattening pigs con irmed through lower losses (deaths and forced to slaughter. In the study followed the production parameters, metabolic pro iles of the test animals, the clinical observation of internal organs on the slaughter and histopathological examination of a sample of 90 fattening pigs. Based on these results we consider that the introduction of hepatoprotective preparation as a supplement in animal feed is fully justi ied and that further research in this direction can bring great bene its to domestic producers of pigs.
The aim of this research was to determine seroprevalence of infection caused by PCV2 in different categories of pigs on the territory of Vojvodina. The research was conducted on 6 pig farms placed in different locations on the territory of Vojvodina (two farms from the territory of Bačka, Banat and Srem, respectively), with the capacity from 500 to 2,500 sows with intensive management, closed type. Blood samples from brachiocephalic plexus were collected from 540 pigs in three different categories, in suckling piglets between 3 and 4 weeks of age, in weaned piglets from 8 to 9 weeks of age, and in fattening pigs between 20 and 22 weeks of age. Specific anti-PCV2 antibodies are determined by using indirect ELISA. Based on our results, we conclude that PCV2 infections are widely spread on the territory of Vojvodina, with total seroprevalence of 74.8%. The highest value of seroprevalence is determined in category of fattening pigs 86%, in suckling piglets this was 74.5%, while in weaned piglets seroprevalence was 65.3%.
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