Repeatability and variation caused by the operator in pigs
2013
Sprysl,, M., Czech University of Life Sciences, Prague (Czech Republic). Faculty of Agrobiology, Food and Natural Resources | Stupka, R., Czech University of Life Sciences, Prague (Czech Republic). Faculty of Agrobiology, Food and Natural Resources | Citek, J., Czech University of Life Sciences, Prague (Czech Republic). Faculty of Agrobiology, Food and Natural Resources
The aim of the study was to determine the repeatability and operator variability, which estimate the backfat thicknes (S-FOM), muscle depth (M-FOM) and lean meat share (LMP) measured twice in one pig with one instrument (FOM). The observed LMP-FOM estimations was also compared with the ZP method. 180 total hybrid pigs of common genotypes, using in the Czech Republic was measured at the abbatoir. For the lean meat share prediction and its comparison the FOM and ZP equations were used. Calculation and the results comparison was performed by mathematical-statistical program SAS Propriety Software Release 6.04. Significance of differences was tested by analysis of variance. The results showed that: - there are minimal differences in the LMP estimation between FOM and ZP, - ZP method, compared to FOM, LMP estimate overstates, - considerable differences between LMP estimates of operators are caused by punctures in the wrong place, - repeatability S and M for the first and repeated injection is high, the accuracy of the estimate LMP-FOM/LMP-ZP are 0.98351/0.838, - accuracy of M-FOM determination is affected by operator, - repeatability accuracy of LMP estimates is for all operators practically identical.
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